CN114124141B

CN114124141B - Radio frequency system and communication device

Info

Publication number: CN114124141B
Application number: CN202111444226.7A
Authority: CN
Inventors: 王国龙
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2021-11-30
Filing date: 2021-11-30
Publication date: 2023-03-17
Anticipated expiration: 2041-11-30
Also published as: CN114124141A

Abstract

In the radio frequency system, a radio frequency transceiver, a transmitting amplifying circuit, a filter circuit and a first antenna can form a transmitting channel to realize transmitting processing of a preset low-frequency signal; the radio frequency transceiver, the transmitting amplifying circuit, the filter circuit and the second antenna can form another transmitting channel to realize the transmitting processing of the preset low-frequency signal; the first antenna, the filter circuit and the first receiving circuit can form a first receiving path to support the receiving of the preset low-frequency signal; the second antenna, the filter circuit and the first receiving circuit can form a second receiving path to support the receiving of the preset low-frequency signal; the third antenna and the second receiving circuit can form a third receiving path to support the receiving of the preset low-frequency signal, and the fourth antenna and the second receiving circuit can form a fourth receiving path to support the receiving of the preset low-frequency signal, so that the radio frequency system supports the two-way transmitting and downlink 4 x 4MIMO receiving functions of the preset low-frequency signal.

Description

Radio frequency system and communication device

Technical Field

The present application relates to the field of radio frequency technologies, and in particular, to a radio frequency system and a communication device.

Background

With the development and progress of the technology, mobile communication technology is gradually beginning to be applied to communication devices such as mobile phones and the like. With the development and progress of the technology, the 5G mobile communication technology is gradually beginning to be applied to electronic devices. The 5G mobile communication technology communication frequency is higher than that of the 4G mobile communication technology. The conventional radio frequency system has poor receiving performance and transmitting performance for 5G low-frequency signals (e.g., N28 frequency band signals) in poor signal areas such as cell edges, building depths or elevators.

Disclosure of Invention

The embodiment of the application provides a radio frequency system and communication equipment, which can realize 4 x 4MIMO reception of preset low-frequency signals and have better receiving performance.

An embodiment of the present application provides a radio frequency system, including:

a radio frequency transceiver;

the transmitting and amplifying circuit is connected with the radio frequency transceiver and is used for amplifying and transmitting the preset low-frequency signal output by the radio frequency transceiver;

the filter circuit is respectively connected with the transmitting amplification circuit, the first antenna and the second antenna and is used for filtering the preset low-frequency signal amplified by the transmitting amplification circuit and outputting the preset low-frequency signal to the first antenna and the second antenna and filtering the preset low-frequency signal received by the first antenna and the second antenna;

the first receiving circuit is respectively connected with the radio frequency transceiver and the filter circuit and is used for receiving a main set of the preset low-frequency signals received by the first antenna and filtered by the filter circuit and receiving a main set MIMO (multiple input multiple output) of the preset low-frequency signals received by the second antenna and filtered by the filter circuit;

and the second receiving circuit is respectively connected with the radio frequency transceiver, the third antenna and the fourth antenna and is used for diversity reception of the preset low-frequency signal received by the third antenna and diversity MIMO reception of the preset low-frequency signal received by the fourth antenna.

The embodiment of the application provides communication equipment, which comprises the radio frequency system.

The radio frequency system comprises a radio frequency transceiver, a transmitting amplifying circuit, a filtering circuit, a first receiving circuit and a second receiving circuit. The radio frequency transceiver, the transmitting amplifying circuit, the filter circuit and the first antenna can form a transmitting channel to realize transmitting processing of a preset low-frequency signal; the radio frequency transceiver, the transmitting amplifying circuit, the filter circuit and the second antenna can form another transmitting path to realize transmitting processing of the preset low-frequency signal; the first antenna, the filter circuit and the first receiving circuit can form a first receiving path to support the main set receiving of the preset low-frequency signal; the second antenna, the filter circuit and the first receiving circuit can form a second receiving path to support the main set MIMO receiving of the preset low-frequency signals; the third antenna and the second receiving circuit may form a third receiving path to support diversity reception of the preset low-frequency signal, and the fourth antenna and the second receiving circuit may form a fourth receiving path to support diversity MIMO reception of the preset low-frequency signal. The radio frequency system provided by the embodiment of the application can support the two-way transmission and downlink 4 x 4MIMO receiving functions of the preset low-frequency signal, and compared with the radio frequency system which can only support the reception of 2 x 2MIMO of the low-frequency signal in the related technology, the downlink speed can be doubled, the downlink coverage distance can be doubled, and the channel capacity and the receiving performance of the radio frequency system can be doubled.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a block diagram of an exemplary RF system;

FIG. 2 is a circuit schematic of a transmit amplifier circuit in one embodiment;

FIG. 3 is a second block diagram of the RF system according to one embodiment;

FIG. 4 is a third block diagram illustrating an exemplary RF system;

FIG. 5 is a circuit schematic of a first integrated circuit in one embodiment;

FIG. 6 is a circuit schematic of a second integrated circuit in one embodiment;

FIG. 7 is a block diagram of an RF system in accordance with an embodiment;

FIG. 8 is a circuit schematic of a third integrated circuit in one embodiment;

FIG. 9 is a fifth block diagram of the RF system in one embodiment;

FIG. 10 is a schematic circuit diagram of a fourth integrated circuit in one embodiment;

FIG. 11 is a circuit schematic of a first receive circuit in one embodiment;

FIG. 12 is a circuit schematic of a second receive circuit in one embodiment;

FIG. 13 is one embodiment of a circuit schematic of a radio frequency system;

FIG. 14 is a second schematic circuit diagram of an RF system according to an embodiment;

FIG. 15 is a third schematic diagram of an RF system in accordance with an embodiment;

fig. 16 is a block diagram of a communication device in one embodiment.

Detailed Description

To facilitate understanding of the present application, the present application will be described in detail with reference to the accompanying drawings. In the following description, numerous specific details are set forth to provide a thorough understanding of the present application, and in the accompanying drawings, preferred embodiments of the present application are set forth. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete. This application is capable of implementation in many other ways than those herein described and of similar modifications by one of ordinary skill in the art without departing from the spirit and scope of the present application and is therefore not limited to the specific embodiments disclosed below.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise. In the description of the present application, "a number" means at least one, such as one, two, etc., unless specifically limited otherwise.

The radio frequency system according to the embodiment of the present application may be applied to a communication device having a wireless communication function, where the communication device may be a handheld device, a vehicle-mounted device, a wearable device, a computing device or other processing devices connected to a wireless modem, and various forms of User Equipment (UE) (e.g., a Mobile phone), a Mobile Station (MS), and the like. For convenience of description, the above-mentioned devices are collectively referred to as a communication device. The network devices may include base stations, access points, and the like.

In one embodiment, as shown in fig. 1, a radio frequency system provided in an embodiment of the present application includes: the radio frequency transceiver 10, the transmission amplifying circuit 20, the filter circuit 30, the first receiving circuit 40 and the second receiving circuit 50.

In this embodiment, the transmission amplifying circuit 20 is connected to the radio frequency transceiver 10, and is configured to amplify and transmit the predetermined low frequency signal output by the radio frequency transceiver 10. The transmitting and amplifying circuit 20 includes two transmitting paths, and the two transmitting paths are respectively connected to the radio frequency transceiver 10 and the filter circuit 30, so as to respectively perform power amplification on the preset low-frequency signal output by the radio frequency transceiver 10, and respectively output the preset low-frequency signal after the power amplification to the first antenna ANT1 and the second antenna ANT2 after the filtering processing of the filter circuit 30.

The preset low-frequency signal may include a radio-frequency signal in a low-frequency band, or may include radio-frequency signals in a plurality of low-frequency bands. The radio frequency signal may include at least one of a 4G LTE low frequency signal and a 5G NR low frequency signal. For example, when the predetermined low frequency signal includes a radio frequency signal in a low frequency band, the predetermined low frequency signal may include a radio frequency signal in any one of the frequency bands N5, N8, N20, N28, N71, B8, B26, and B28.

Alternatively, the transmitting Amplifier circuit 20 may be a multi-mode multi-band Power Amplifier (MMPA). The transmission amplifying circuit 20 may also amplify the power of the preset intermediate frequency signal and the preset high frequency signal. The preset intermediate frequency signal may include a radio frequency signal of an intermediate frequency band signal, or may include radio frequency signals of a plurality of intermediate frequency band signals; the preset high frequency signal may include a radio frequency signal of one high frequency band signal, or may include radio frequency signals of a plurality of high frequency band signals. The radio frequency signal may include at least one of a 4G LTE low frequency signal and a 5G NR low frequency signal. The frequency division of the low frequency signal, the intermediate frequency signal and the high frequency signal is shown in table 1.

TABLE 1 frequency division table for low frequency signal, intermediate frequency signal and high frequency signal

It should be noted that, in the 5G network, the frequency band used by 4G is used, only the identifier before the serial number is changed, and the plurality of low frequency bands of the low frequency signal are not limited to the above example.

In this embodiment, the filter circuit 30 is respectively connected to the transmitting amplifier circuit 20, the first antenna ANT1, and the second antenna ANT2, and is configured to perform filtering processing on the preset low-frequency signal amplified by the transmitting amplifier circuit 20 and output the preset low-frequency signal to the first antenna ANT1 and the second antenna ANT2, and perform filtering processing on the preset low-frequency signal received by the first antenna ANT1 and the second antenna ANT2.

The filter circuit 30 includes two transmission paths and two reception paths, so as to implement two-path transmission and two-path reception. The two transmitting paths of the filter circuit 30 respectively correspond to the two transmitting paths of the transmitting and amplifying circuit 20, so that preset low-frequency signals output by the two transmitting paths of the transmitting and amplifying circuit 20 are filtered and then respectively output to the first antenna ANT1 and the second antenna ANT2; the two receiving paths of the filter circuit 30 correspond to the two receiving paths of the first receiving circuit 40, respectively, so that the preset low-frequency signals received by the first antenna ANT1 and the second antenna ANT2 are filtered and then output to the two receiving paths of the first receiving circuit 40, respectively.

Alternatively, the filter circuit 30 may also perform filtering processing on the preset intermediate frequency signal and the preset high frequency signal. The related descriptions of the preset intermediate frequency signal and the preset high frequency signal refer to the above related descriptions, which are not described herein again. Alternatively, the filter circuit 30 may further perform amplification processing and filtering processing on the 2G low-frequency signal and the 2G high-frequency signal, and output the signals to the first antenna ANT1.

In this embodiment, the first receiving circuit 40 is respectively connected to the radio frequency transceiver 10 and the filter circuit 30, and is configured to receive a main set of the preset low frequency signals received by the first antenna ANT1 and filtered by the filter circuit 30, and receive a main set MIMO of the preset low frequency signals received by the second antenna ANT2 and filtered by the filter circuit 30; the second receiving circuit 50 is connected to the rf transceiver 10, the third antenna ANT3, and the fourth antenna ANT4, respectively, and is configured to receive the preset low frequency signal received by the third antenna ANT3 in a diversity mode and receive the preset low frequency signal received by the fourth antenna ANT4 in a diversity MIMO mode.

The first receiving circuit 40 implements dominant set reception and dominant set MIMO reception of preset low-frequency signals through a first antenna ANT1 and a second antenna ANT2, respectively, to implement a dual-path receiving function; the second receiving circuit 50 implements diversity reception and diversity MIMO reception of a preset low frequency signal through the third antenna ANT3 and the fourth antenna ANT4, respectively, to implement a two-way receiving function. Specifically, the first receiving circuit 40 amplifies preset low-frequency signals received by the master set and the master set MIMO, respectively, and outputs the amplified preset low-frequency signals to the radio frequency transceiver 10; the second receiving circuit 50 performs filtering and amplification processing on the preset low-frequency signals received by the diversity reception and the diversity MIMO respectively, and outputs the filtered and amplified preset low-frequency signals to the radio frequency transceiver 10.

The first receiving circuit 40 and the second receiving circuit 50 cooperate together to implement four-path receiving processing on the preset low-frequency signal, and further, a4 x 4mimo receiving function of the low-frequency signal can be preset. The MIMO (Multiple Input Multiple Output, multiple transmission and Multiple reception) technology is to use Multiple transmitting antennas and Multiple receiving antennas at a transmitting port and a receiving port, respectively, to make full use of space resources, and implement Multiple transmission and Multiple reception through Multiple antennas, so as to improve the channel capacity of the system by Multiple times without increasing spectrum resources and antenna transmitting power. For example, if the predetermined low frequency signal is an N28 band signal, the rf system may transmit the N28 band signal and perform a downlink 4 x 4mimo receiving function. If the low frequency signals include N5, N8, N20, N28, and N71 band signals, the rf system may transmit the N5, N8, N20, N28, and N71 band signals and perform a downlink 4 x 4mimo receiving function.

In the present embodiment, the radio frequency transceiver 10 may be configured with a plurality of ports to realize the connection with the transmission amplifying circuit 20, the first receiving circuit 40, and the second receiving circuit 50. Alternatively, the radio frequency transceiver 10 includes a transmitter for transmitting the radio frequency signal to the transmission amplifying circuit 20 and a receiver for receiving the radio frequency signal output from the first receiving circuit 40 and the second receiving circuit 50.

In this embodiment, the first antenna ANT1, the second antenna ANT2, the third antenna ANT3, and the fourth antenna ANT4 can transmit and receive radio frequency signals. The radio frequency signals can comprise low, medium and high frequency signals of a 4G network and a 5G network, and can also comprise low and high frequency signals of a 2G network. Each branch antenna may be formed using any suitable type of antenna. For example, each branch antenna may include an antenna with a resonating element formed from the following antenna structure: at least one of an array antenna structure, a loop antenna structure, a patch antenna structure, a slot antenna structure, a helical antenna structure, a strip antenna, a monopole antenna, a dipole antenna, and the like. Different types of antennas may be used for different frequency bands and frequency band combinations. In the embodiment of the present application, the types of the first antenna ANT1, the second antenna ANT2, the third antenna ANT3, and the fourth antenna ANT4 are not further limited.

The radio frequency system provided by the embodiment includes a radio frequency transceiver 10, a transmission amplifying circuit 20, a filtering circuit 30, a first receiving circuit 40, and a second receiving circuit 50. The radio frequency transceiver 10, the transmitting and amplifying circuit 20, the filter circuit 30 and the first antenna ANT1 may form a transmitting path to transmit a preset low frequency signal; the radio frequency transceiver 10, the transmission amplifying circuit 20, the filter circuit 30 and the second antenna ANT2 may form another transmission path to implement transmission processing of the preset low frequency signal; the first antenna ANT1, the filter circuit 30 and the first receiving circuit 40 may form a first receiving path to support a dominant set receiving of a preset low frequency signal; the second antenna ANT2, the filter circuit 30 and the first receiving circuit 40 may form a second receiving path to support dominant set MIMO reception of a preset low frequency signal; the third antenna ANT3 and the second receiving circuit 50 may form a third receiving path to support diversity reception of the preset low frequency signal, and the fourth antenna ANT4 and the second receiving circuit 50 may form a fourth receiving path to support diversity MIMO reception of the preset low frequency signal. The radio frequency system provided by the embodiment of the application can support the two-way transmission and downlink 4 x 4MIMO receiving functions of the preset low-frequency signal, and compared with the radio frequency system which can only support the reception of 2 x 2MIMO of the low-frequency signal in the related technology, the downlink speed can be doubled, the downlink coverage distance can be doubled, and the channel capacity and the receiving performance of the radio frequency system can be doubled.

In one embodiment, as shown in fig. 2, the transmitting and amplifying circuit 20 is configured with a first low frequency input port, a second low frequency input port, a first low frequency output port, and a second low frequency output port, the first low frequency input port and the second low frequency input port are respectively connected to the radio frequency transceiver 10, the first low frequency output port and the second low frequency output port are respectively connected to the filter circuit 30, the transmitting and amplifying circuit 20 includes:

the input end of the first power amplification module 210 is connected to the first low-frequency input port, and the output end of the first power amplification module 210 is connected to the first low-frequency output port, and is configured to perform power amplification on a preset low-frequency signal; an input end of the second power amplifying module 220 is connected to the second low-frequency input port, and an output end of the second power amplifying module 220 is connected to the second low-frequency output port, and configured to perform power amplification on the preset low-frequency signal.

The first power amplifying module 210 and the second power amplifying module 220 are both configured to perform power amplification on the preset low-frequency signal output by the radio frequency transceiver 10, and output the preset low-frequency signal after power amplification to the filter circuit 30. The first low-frequency input port, the first power amplification module 210, the first low-frequency output port, the filter circuit 30, and the first antenna ANT1 form a first transmit path of the transmit amplifier circuit 2020, so as to perform power amplification and filtering on a preset low-frequency signal output by the radio frequency transceiver 10, and finally output to the first antenna ANT1 for transmission; the second low-frequency input port, the second power amplification module 220, the second low-frequency output port, the filter circuit 30, and the second antenna ANT2 form a second transmission path of the transmission amplification circuit 20, so as to perform power amplification and filtering on the preset low-frequency signal output by the radio frequency transceiver 10, and finally output the preset low-frequency signal to the second antenna ANT2 for transmission. Thereby, the transmission amplifying circuit 20 is made to have a two-way transmission function.

By integrating the first power amplification module 210 and the second power amplification module 220, the occupied area of the transmission amplification circuit 20 can be reduced; meanwhile, the integration level of the device is improved, and the cost is reduced by only once packaging; moreover, matching among all parts can be realized in the device, the mismatching of ports is reduced, and the performance is improved.

Optionally, the transmitting and amplifying circuit 20 is further configured with an intermediate frequency input port, a high frequency input port, an intermediate frequency output port, and a high frequency output port, where the intermediate frequency input port and the high frequency input port are respectively connected to the radio frequency transceiver 10, the intermediate frequency output port and the high frequency output port are respectively connected to the filter circuit 30, the transmitting and amplifying circuit 20 further includes a third power amplifying module 230, an input end of the third power amplifying module 230 is connected to the intermediate frequency input port, an output end of the third power amplifying module 230 is connected to the intermediate frequency output port, and is configured to amplify a preset intermediate frequency signal, and selectively output the amplified signal in any intermediate frequency band; an input end of the fourth power amplification module 240 is connected to the high-frequency input port, and an output end of the fourth power amplification module 240 is connected to the high-frequency output port, and is configured to perform power amplification on the high-frequency signal and selectively output the amplified signal in any high-frequency band.

Optionally, the first power amplifying module 210 includes a first power amplifier PA1 and a first switch, an input end of the first power amplifier PA1 is connected to the first low-frequency input port, an output end of the first power amplifier PA1 is connected to a first end of the first switch, the first power amplifier PA1 can amplify a plurality of received preset low-frequency signals, and output the plurality of amplified preset low-frequency signals to the first switch, a plurality of first ends of the first switch are respectively connected to the plurality of first low-frequency output ports in a one-to-one correspondence manner, and are configured to connect a radio frequency path between the first power amplifier PA1 and any one of the first low-frequency output ports, so as to selectively transmit the plurality of low-frequency signals. Further, the first switch may be a SPmT switch, where m is greater than or equal to the total number of low frequency signals, e.g., the first switch is a single pole five throw switch SP5T #1.

Optionally, the number of the first low frequency input ports is two, and the first power amplification module 210 further includes a single-pole double-throw switch, where two first ends of the single-pole double-throw switch are respectively connected to the two low frequency input ports LB RFIN in a one-to-one correspondence, and a second end of the single-pole double-throw switch is connected to the input end of the first power amplifier PA 1. By arranging the two low-frequency input ports LB1 RFIN and LB2 RFIN and the single-pole double-throw switch SPDT #1, the control flexibility of the low-frequency signals can be correspondingly improved.

Optionally, the second power amplifying module 220 includes a second power amplifier PA2, an input terminal of the second power amplifier PA0 is connected to the second low frequency input port LB RFIN0, and an output terminal of the second power amplifier PA2 is connected to the second low frequency output port LB 0. The second power amplifier PA2 may amplify the received preset low frequency signal and output the amplified preset low frequency signal.

Optionally, the third power amplifying module 230 includes a third power amplifier PA3 and a third switch. The input end of the third power amplifier PA3 is connected to the intermediate frequency input port, the output end of the third power amplifier PA3 is connected to the first end of the third switch, and the third switch is configured to amplify the received multiple intermediate frequency signals and output the amplified multiple intermediate frequency signals to the third switch. A plurality of second ends of the third switch are respectively connected with the plurality of intermediate frequency transmitting ports in a one-to-one correspondence manner, and are used for conducting a radio frequency path between the third power amplifier PA3 and any intermediate frequency transmitting port so as to selectively transmit the plurality of intermediate frequency signals. Further, the third switch may be an SPnT switch, where n is greater than or equal to the total number of intermediate frequency signals. For example, as shown in fig. 2, the third switch is a single pole, five throw switch SP5T #2.

The fourth power amplifying module 240 includes a fourth power amplifier PA4 and a fourth switch, an input end of the fourth power amplifier PA4 is connected to the high-frequency input port HB RFIN, and an output end of the fourth power amplifier PA4 is connected to the fourth switch, and is configured to receive and amplify a plurality of preset high-frequency signals, and output the plurality of amplified high-frequency signals to the fourth switch.

The fourth switch is respectively connected to a plurality of transceiving ports (e.g., HB1, HB2, HB3, and HB 4) and a plurality of high frequency receiving ports (e.g., HBRX1, HBRX2, HBRX3, and HBRX 4) of the filter circuit 30, and is configured to selectively turn on a transmission path between the fourth power amplifier PA4 and any transceiving port, so that a plurality of preset high frequency signals amplified by the fourth power amplifier PA4 can be transmitted to the corresponding transceiving port through the corresponding transmission path and output. The fourth switch may also be configured to selectively turn on a receiving path between a transceiving port (e.g., HB 1) in any transceiving port group and a high-frequency receiving port (e.g., HBRX 1), so that the transceiving port HB1 may correspondingly receive a high-frequency signal in a corresponding frequency band, and output the received high-frequency signal through the receiving path and the high-frequency receiving port HBRX1, and transmit the received high-frequency signal to the corresponding first receiving circuit 40 for processing. Optionally, the fourth switch may comprise a plurality of single pole double throw switches (e.g., the fourth switch may comprise 5 single pole double throw switches).

In one embodiment, as shown in fig. 3, the filter circuit 30 includes:

the first filtering module 310, two first ends of the first filtering module 310 are respectively connected to the transmitting amplifying circuit 20 and the first receiving circuit 40 in a one-to-one correspondence manner, and a second end of the first filtering module 310 is connected to the first antenna ANT1, and is configured to filter the preset low-frequency signal amplified by the transmitting amplifying circuit 20 and output the signal to the first antenna ANT1, and filter the preset low-frequency signal received by the first antenna ANT1 and output the signal to the first receiving circuit 40; the second filtering module 320, two first ends of the second filtering module 320 are respectively connected to the transmitting amplifying circuit 20 and the first receiving circuit 40 in a one-to-one correspondence manner, and a second end of the second filtering module 320 is connected to the second antenna ANT2, and is configured to filter the preset low-frequency signal amplified by the transmitting amplifying circuit 20 and output the same to the second antenna ANT2, and filter the preset low-frequency signal received by the second antenna ANT2 and output the same to the first receiving circuit 40.

The first filtering module 310 is disposed on a radio frequency path between the transmission amplifying circuit 20 and the first antenna ANT1, and the second filtering module 320 is disposed on a radio frequency path between the transmission amplifying circuit 20 and the second antenna ANT2. Filtering the received preset low-frequency signals through the first filtering module 310 and the second filtering module 320 respectively to filter out signals except the low-frequency signals, and outputting only the preset low-frequency signals; meanwhile, signals of the transmitting amplifying circuit 20 and the first receiving circuit 40 can be isolated, for example, a transceiving path of a preset low-frequency signal is separated according to a signal direction of the preset low-frequency signal to achieve an isolation effect.

Optionally, the first filtering module 310 and the second filtering module 320 may be duplexers or filters, and when the preset low-frequency signal is a radio frequency signal in a single low-frequency band, for example, an N28-band signal, the first filtering module 310 and the second filtering module 320 may respectively filter stray waves outside the N28-band, and only output the N28-band signal; when the preset low-frequency signal is a radio frequency signal of a plurality of low-frequency bands, a plurality of first filtering modules 310 and second filtering modules 320 may be respectively arranged, or the first filtering module 310 and the second filtering module 320 respectively include a plurality of duplexers or filters, so as to respectively perform filtering processing on each low-frequency signal. Taking the first filtering module 310 as an example, when the first filtering module 310 includes a duplexer, two first ends of the duplexer are respectively connected to the output end of the transmitting amplifying circuit 20 and the first receiving circuit 40, and a second end of the duplexer is connected to the first antenna ANT1; when the first filtering module 310 includes filters, the first filtering module 310 may specifically include two filters and a switch device, first ends of the two filters are respectively connected to two first ends of the switch device, second ends of the two filters are respectively connected to the transmitting and amplifying circuit 20 and the first receiving circuit 40 in a one-to-one correspondence manner, and a second end of the switch device is connected to the first antenna ANT1.

In one embodiment, as shown in fig. 3, the filter circuit 30 further includes:

the first coupling module 330, an input end of the first coupling module 330 is connected to the first filtering module 310, an output end of the first coupling module 330 is connected to the first antenna ANT1, and the first coupling module is configured to couple a preset low-frequency signal in a radio frequency path between the first filtering module 310 and the first antenna ANT1 to output a first coupling signal; the input end of the second coupling module 340 is connected to the second filtering module 320, and the output end of the second coupling module 340 is connected to the second antenna ANT2, and is configured to couple a preset low-frequency signal in a radio frequency path between the second filtering module 320 and the second antenna ANT2 to output a second coupled signal; two first ends of the first gating module 350 are respectively connected to the coupling output end of the first coupling module 330 and the coupling output end of the second coupling module 340 in a one-to-one correspondence manner, a second end of the first gating module 350 is connected to the rf transceiver 10, and is configured to selectively conduct a radio frequency path between the first coupling module 330 and the rf transceiver 10 to output the first coupled signal to the rf transceiver 10, and selectively conduct a radio frequency path between the second coupling module 340 and the rf transceiver 10 to output the second coupled signal to the rf transceiver 10.

The first coupling module 330 is disposed on a radio frequency path between the first filtering module 310 and the first antenna ANT1, and is configured to couple a radio frequency signal (a preset low frequency signal, a preset intermediate frequency signal, or a preset high frequency signal) on the radio frequency path to detect power information of the radio frequency signal to generate a first coupling signal, and output the first coupling signal to the radio frequency transceiver 10 through the coupling output terminal. Specifically, the first coupled signal includes a forward coupled signal and a backward coupled signal, and forward power information of the low frequency signal can be detected based on the forward coupled signal; based on the reverse coupling signal, reverse power information of the low frequency signal can be correspondingly detected.

The second coupling module 340 is disposed on the rf path between the second filtering module 320 and the second antenna ANT2, and is configured to couple an rf signal (a preset low frequency signal, a preset intermediate frequency signal, or a preset high frequency signal) on the rf path to detect power information of the rf signal to generate a second coupling signal, and output the second coupling signal to the rf transceiver 10 through the coupling output terminal. Specifically, the second coupled signal includes a forward coupled signal and a backward coupled signal, and forward power information of the low frequency signal can be detected based on the forward coupled signal; based on the reverse coupling signal, reverse power information of the low frequency signal can be correspondingly detected.

The first gating module 350 selectively switches on the rf path between the first coupling module 330 and the rf transceiver 10 to output the first coupled signal to the rf transceiver 10, and selectively switches on the rf path between the second coupling module 340 and the rf transceiver 10 to output the second coupled signal to the rf transceiver 10. Therefore, the first gating module 350 can selectively output the first coupling signal or the second coupling signal to the rf transceiver 10, so that the rf transceiver 10 can obtain the power information of the rf path between the first coupling module 330 and the rf transceiver 10 and the power information of the rf path between the second coupling module 340 and the rf transceiver 10 at different times. Optionally, the first gating module 350 is a single-pole double-throw switch, two first ends of the single-pole double-throw switch are respectively connected to the coupling output end of the first coupling module 330 and the coupling output end of the second coupling module 340 in a one-to-one correspondence manner, and a second end of the single-pole double-throw switch is connected to the radio frequency transceiver 10.

In one embodiment, based on the embodiment shown in fig. 3, as shown in fig. 4, the filter circuit 30 further includes:

a second gating module 360, wherein a first end of the second gating module 360 is connected to the second end of the first filtering module 310, another first end of the second gating module 360 is connected to the second end of the second filtering module 320, a second end of the second gating module 360 is connected to the input end of the first coupling module 330, and another second end of the second gating module 360 is connected to the input end of the second coupling module 340, and is used for selectively connecting a radio frequency path between the first filtering module 310 and the first coupling module 330 and a radio frequency path between the second filtering module 320 and the second coupling module 340; and is further configured to selectively turn on the rf path between the first filtering module 310 and the second coupling module 340 and the rf path between the second filtering module 320 and the first coupling module 330.

The second gating module 360 is respectively connected to the first filtering module 310, the second filtering module 320, the first coupling module 330, and the second coupling module 340, so as to selectively connect the rf path between the first filtering module 310 and the first coupling module 330 and the rf path between the second filtering module 320 and the second coupling module 340; and selectively turning on the rf path between the first filtering module 310 and the second coupling module 340 and the rf path between the second filtering module 320 and the first coupling module 330. Therefore, the path for filtering the preset low-frequency signal can be increased through the second gating module 360, and the insertion loss of the filter circuit can be reduced, so as to improve the output power of the filter circuit. When the radio frequency path between the first filtering module 310 and the second coupling module 340 and the radio frequency path between the second filtering module 320 and the first coupling module 330 are selected to be turned on, the receiving functions of the first antenna ANT1 and the second antenna ANT2 may also be switched, so that the receiving function of the first antenna ANT1 is switched to the master set MIMO receiving function, and the receiving function of the second antenna ANT2 is switched to the master set receiving function. Optionally, the second gating module 360 is a double pole, multiple throw switch.

Optionally, the first coupling module 330 includes a first coupler Co1, a first switch DPDT #1, and a first resistor R1 (please refer to fig. 5 and fig. 6), wherein an input end of the first coupler Co1 and a first end (contact 1) of the first switch DPDT #1 are connected to serve as an input end of the first coupling module 330, an output end of the first coupler Co1 and a second end (contact 3) of the first switch DPDT #1 are connected to serve as an output end of the first coupling module 330, another first end (contact 2) of the first switch DPDT #1 serves as a coupling output end of the first coupling module 330, another second end (contact 4) of the first switch DPDT #1 is connected to a first end of the first resistor R1, and a second end of the first resistor R1 is grounded. When detecting forward power, contact 1 of the first switch DPDT #1 is tangent to contact 2, contact 3 is tangent to contact 4; when detecting reverse power, contact 1 of the first switch DPDT #1 is directed to contact 4 and contact 3 is directed to contact 2.

Optionally, the second coupling module 340 includes a second coupler Co2, a second switch DPDT #2, and a second resistor R2 (please refer to fig. 5 and fig. 6), wherein an input terminal of the second coupler Co2 is connected to a first terminal (contact 1) of the second switch DPDT #2 to serve as an input terminal of the second coupling module 340, an output terminal of the second coupler Co2 is connected to a second terminal (contact 3) of the second switch DPDT #2 to serve as an output terminal of the second coupling module 340, another first terminal (contact 2) of the second switch DPDT #2 serves as a coupling output terminal of the second coupling module 340, another second terminal (contact 4) of the second switch DPDT #2 is connected to the first terminal of the first resistor R1, and the second terminal of the first resistor R1 is grounded. When detecting forward power, contact 1 of the second switch DPDT #2 is tangent to contact 2, and contact 3 is tangent to contact 4; when detecting reverse power, contact 1 of the second switch DPDT #2 is directed towards contact 4 and contact 3 is directed towards contact 2.

In one embodiment, based on the embodiment of fig. 4, as shown in fig. 5, the second gating module 360, the first coupling module 330, and the second coupling module 340 form a first integrated circuit 301; wherein:

the first integrated circuit 301 is configured with a plurality of transceiving ports (e.g., TRX0, TRX1, TRX 4.), a first antenna port LB ANT1, a second antenna port LB ANT2, a first coupling port CPLOUT1, and a second coupling port CPLOUT2, the plurality of transceiving ports TRX are respectively connected to the second end of the first filter module 310 and the second end of the second filter module 320 in a one-to-one correspondence manner, the first antenna port LB ANT1 is connected to the first antenna ANT1, the second antenna port LB ANT2 is connected to the second antenna ANT2, the first coupling port CPLOUT1 is connected to a first end of the first gating module 350, and the second coupling port CPLOUT2 is connected to another first end of the first gating module 350; a plurality of first ends of the second gating module 360 are respectively connected to a plurality of transceiving ports TRX in a one-to-one correspondence manner, an output end of the first coupling module 330 is connected to the first antenna port LB ANT1, a coupling output end of the first coupling module 330 is connected to the first coupling port CPLOUT1, an output end of the second coupling module 340 is connected to the second antenna port LB ANT2, and a coupling output end of the second coupling module 340 is connected to the second coupling port CPLOUT2.

The second gating module 360, the first coupling module 330 and the second coupling module 340 form the first integrated circuit 301, so that the integration level of the device can be improved, and the occupied area of the filter circuit 30 can be reduced; meanwhile, the integration level of the device is improved, and the cost is reduced by only once packaging; moreover, matching among all parts can be realized in the device, the mismatching of ports is reduced, and the performance is improved.

In one embodiment, based on the embodiment of fig. 4, as shown in fig. 6, the first gating module 350, the second gating module 360, the first coupling module 330, and the second coupling module 340 form the second integrated circuit 302; wherein:

the second integrated circuit 302 is configured with a plurality of transceiving ports TRX (e.g., TRX0, TRX1, TRX 4.), a first antenna port LB ANT1, a second antenna port LB ANT2, and a third coupling port CPLOUT3, the plurality of transceiving ports TRX are respectively connected to the second end of the first filter module 310 and the second end of the second filter module 320 in a one-to-one correspondence, the first antenna port LB ANT1 is connected to the first antenna ANT1, the second antenna port LB ANT2 is connected to the second antenna ANT2, and the third coupling port CPLOUT3 is connected to the radio frequency transceiver 10; a plurality of first ends of the second gating module 360 are respectively connected to a plurality of transceiving ports TRX in a one-to-one correspondence manner, an output end of the first coupling module 330 is connected to the first antenna port LB ANT1, an output end of the second coupling module 340 is connected to the second antenna port LB ANT2, and a second end of the first gating module 350 is connected to the third coupling port CPLOUT3.

By forming the first gating module 350, the second gating module 360, the first coupling module 330, and the second coupling module 340 into the second integrated circuit 302, the occupied area of the filter circuit 30 can be further reduced compared to fig. 5; meanwhile, the integration level of the device is improved, and the cost is reduced by only once packaging; moreover, matching among all parts can be realized in the device, the mismatching of ports is reduced, and the performance is improved.

In one embodiment, based on the embodiment in fig. 5 and/or fig. 6, the preset low-frequency signal includes radio-frequency signals in a plurality of low-frequency bands; wherein:

the number of the first filtering modules 310 is multiple, two first ends of each first filtering module 310 are respectively connected with the transmitting and amplifying circuit 20 and the first receiving circuit 40 in a one-to-one correspondence manner, a second end of each first filtering module 310 is connected with a transceiving port TRX, and frequency bands of preset low-frequency signals output by each first filtering module 310 are different; and/or the number of the second filtering modules 320 is multiple, two first ends of each second filtering module 320 are respectively connected to the transmitting and amplifying circuit 20 and the first receiving circuit 40 in a one-to-one correspondence manner, a second end of each second filtering module 320 is connected to another transceiving port TRX, and frequency bands of preset low-frequency signals output by each second filtering module 320 are different.

The number of the first filtering modules 310 is multiple, and the frequency bands of the preset low-frequency signals output by each first filtering module 310 are different, so that the radio frequency path between the radio frequency transceiver 10 and the first antenna ANT1 can amplify and filter the low-frequency signals of multiple different frequency bands, thereby implementing transceiving of the low-frequency signals of multiple different frequency bands. The number of the first filtering modules 310 may be the same as the number of the preset low frequency signals. For example, each first filtering module 310 includes one duplexer, for example, the preset low-frequency signal includes five signals of different frequency bands N5, N8, N20, N28, and N71, and five duplexers may be correspondingly disposed to implement filtering processing on the five low-frequency signals. It should be noted that, when the correlation processing of the low-frequency signals of multiple different frequency bands is required, one first filtering module 310 may also be provided, for example, the first filtering module 310 is provided to include multiple duplexers.

The number of the second filtering modules 320 is multiple, and the frequency bands of the preset low-frequency signals output by each second filtering module 320 are different, so that the radio frequency path between the radio frequency transceiver 10 and the second antenna ANT2 can amplify and filter the low-frequency signals of multiple different frequency bands, thereby implementing transceiving of the low-frequency signals of multiple different frequency bands. The number of the second filtering modules 320 may be the same as the number of the preset low frequency signals. For example, each second filtering module 320 includes one duplexer, for example, the preset low-frequency signal includes five signals of different frequency bands N5, N8, N20, N28, and N71, and five duplexers may be correspondingly disposed to implement filtering processing on the five low-frequency signals. It should be noted that, when the low-frequency signals of multiple different frequency bands need to be processed in a correlated manner, one second filtering module 320 may also be provided, for example, the second filtering module 320 includes multiple duplexers.

In one embodiment, based on the embodiment shown in fig. 3, as shown in fig. 7 (only one first filtering module 310 is shown in the figure), the preset low-frequency signal includes radio-frequency signals in a plurality of low-frequency bands; the number of the first filtering modules 310 is multiple, two first ends of each first filtering module 310 are respectively connected with the transmitting and amplifying circuit 20 and the first receiving circuit 40 in a one-to-one correspondence manner, and the frequency bands of the preset low-frequency signals output by each first filtering module 310 are different; the filter circuit 30 further includes:

a third gating module 370, wherein a plurality of first ends of the third gating module 370 are respectively connected to second ends of the plurality of first filtering modules 310 in a one-to-one correspondence manner, and a second end of the third gating module 370 is connected to an input end of the first coupling module 330, and is configured to gate a radio frequency path between the first filtering module 310 and the first antenna ANT1.

The number of the first filtering modules 310 is multiple, and the frequency bands of the preset low-frequency signals output by each first filtering module 310 are different. For the description of the first filtering module 310, reference may be made to the related description of the above embodiments, and details are not repeated herein.

The first ends of the third gating module 370 are respectively connected to the second ends of the first filtering modules 310 in a one-to-one correspondence manner, and the second end of the third gating module 370 is connected to the input end of the first coupling module 330, so that the third gating module 370 can implement a selective on function of a radio frequency path between the first filtering module 310 and the first antenna ANT1, and further enable the radio frequency path between the radio frequency transceiver 10 and the first antenna ANT1 to amplify and filter low frequency signals of multiple different frequency bands, thereby implementing transceiving of low frequency signals of multiple different frequency bands. In addition, the third gating module 370 can also reduce the insertion loss of the filter circuit, so as to improve the output power of the filter circuit. Optionally, the third gating module 370 is a multi-channel selection switch.

In one embodiment, on the basis of fig. 7, as shown in fig. 8, the first coupling module 330 and the third gating module 370 form a third integrated circuit 303, the third integrated circuit 303 is configured with a plurality of transceiving ports TRX (e.g., TRX0, TRX1, TRX 4.), the first antenna port LB ANT1 and the first coupling port CPLOUT1, the plurality of transceiving ports TRX are respectively connected to the second ends of the plurality of first filtering modules 310 in a one-to-one correspondence manner, the first antenna port LB ANT1 is connected to the first antenna ANT1, and the first coupling port CPLOUT1 is connected to a first end of the first gating module 350; wherein:

the first ends of the third gating module 370 are respectively connected to the transceiver ports TRX in a one-to-one correspondence manner, and the coupling output end of the first coupling module 330 is connected to the first coupling port CPLOUT1.

The third integrated circuit 303 is formed by the first coupling module 330 and the third gating module 370, so that the occupied area of the filter circuit 30 can be reduced, and the device integration level is improved.

In one embodiment, based on the embodiment shown in fig. 3, as shown in fig. 9 (only one second filtering module 320 is shown in the figure), the preset low-frequency signal includes a plurality of radio-frequency signals in a low-frequency band; the number of the second filtering modules 320 is multiple, two first ends of each second filtering module 320 are respectively connected to the transmitting and amplifying circuit 20 and the first receiving circuit 40 in a one-to-one correspondence manner, and the frequency bands of the preset low-frequency signals output by each second filtering module 320 are different; the filter circuit 30 further includes:

a fourth gating module 380, wherein a plurality of first ends of the fourth gating module 380 are respectively connected to the second ends of the plurality of second filtering modules 320 in a one-to-one correspondence manner, and a second end of the fourth gating module 380 is connected to the input end of the second coupling module 340, and is configured to gate a radio frequency path between the second filtering module 320 and the second antenna ANT2.

The number of the second filtering modules 320 is multiple, and the frequency bands of the preset low-frequency signals output by each second filtering module 320 are different. For the description of the second filtering module 320, reference may be made to the related description of the above embodiments, and details are not repeated herein.

The first ends of the fourth gating module 380 are respectively connected to the second ends of the second filtering modules 320 in a one-to-one correspondence manner, and the second end of the fourth gating module 380 is connected to the input end of the second coupling module 340, so that the fourth gating module 380 can implement a selective switch-on function of a radio frequency path between the second filtering module 320 and the second antenna ANT2, and further enable the radio frequency path between the radio frequency transceiver 10 and the second antenna ANT2 to amplify and filter low frequency signals of multiple different frequency bands, thereby implementing transceiving of low frequency signals of multiple different frequency bands. In addition, the fourth gating module 380 can also reduce the insertion loss of the filter circuit, thereby increasing the output power of the filter circuit. Optionally, the fourth gating module 380 is a multi-channel selection switch.

In one embodiment, on the basis of fig. 9, as shown in fig. 10, the second coupling module 340 and the fourth gating module 380 form a fourth integrated circuit 304, the fourth integrated circuit 304 is configured with a plurality of transceiving ports TRX, e.g., TRX0, TRX1, TRX 4.), a second antenna port LB ANT2 and a second coupling port CPLOUT2, the plurality of transceiving ports TRX are respectively connected to the second ends of the plurality of second filtering modules 320 in a one-to-one correspondence manner, the second antenna port LB ANT2 is connected to the second antenna ANT2, and the second coupling port CPLOUT2 is connected to a first end of the fourth gating module 380; wherein:

the first ends of the fourth gating module 380 are respectively connected to the plurality of transceiving ports TRX in a one-to-one correspondence manner, and the coupling output end of the second coupling module 340 is connected to the second coupling port CPLOUT2.

The fourth integrated circuit 304 is formed by the second coupling module 340 and the fourth gating module 380, so that the occupied area of the filter circuit 30 can be reduced, and the device integration level is improved.

It should be noted that the first integrated circuit 301, the second integrated circuit 302, the third integrated circuit 303, and the fourth integrated circuit 304 IN the above embodiments may also be configured with a 2G high frequency input port 2G HB IN and a 2G low frequency input port 2G LB IN, respectively. The first integrated circuit 301, the second integrated circuit 302, the third integrated circuit 303, and the fourth integrated circuit further include: 2G power amplifier 2G HB PA, first filter F1,2G power amplifier 2G LB PA, second filter F2.

The input end of the 2G power amplifier 2G HB PA is connected to the 2G high-frequency input port 2G HB IN, the output end of the 2G power amplifier 2G HB PA is connected to the input end of the first filter F1, the input end of the first filter F1 is connected to a first end of the second gating module 360, the 2G power amplifier 2G HB PA is configured to receive and amplify a 2G high-frequency signal, and the first filter F1 is configured to perform filtering processing on the amplified 2G high-frequency signal. The input end of the 2G power amplifier 2G LB PA is connected to the 2G low frequency input port 2G LB IN, the output end of the 2G power amplifier 2G LB PA is connected to the input end of the second filter F2, the input end of the second filter F2 is connected to the other first end of the second gating module 360, the 2G power amplifier 2G LB PA is configured to receive and amplify the 2G low frequency signal, and the second filter F2 is configured to perform filtering processing on the amplified 2G low frequency signal.

It should be noted that, in the above embodiment, the first filtering module 310 and the second filtering module 320 may also be integrated in the first integrated circuit 301, the second integrated circuit 302, the third integrated circuit 303 and the fourth integrated circuit 304, so as to further reduce the area occupied by the radio frequency system, achieve the purpose of improving the device integration level, and provide a space for performance optimization of the peripheral device.

In one embodiment, as shown in fig. 11, the first receiving circuit 40 is configured with a first lf receiving port, a second lf receiving port, a first lf output port and a second lf output port, wherein the first lf receiving port is connected to a first end of the first filtering module 310, the second lf receiving port is connected to a first end of the second filtering module 320, the first lf output port and the second lf output port are respectively connected to the rf transceiver 10, and the first receiving circuit 40 includes:

a first receiving and amplifying module 410, respectively connected to the first low-frequency receiving port and the first low-frequency output port, for receiving and amplifying the preset low-frequency signal filtered by the first filtering module 310 to implement the main set receiving; the second receiving and amplifying module 420 is connected to the second low-frequency receiving port and the second low-frequency output port, respectively, and is configured to receive and amplify the preset low-frequency signal filtered by the second filtering module 320, so as to implement the main set MIMO receiving. Thus, the first reception amplification module 410 and the second reception amplification module 420 can realize the main set reception and the main set MIMO reception of the first reception circuit 40.

Optionally, the first receiving circuit 40 is further configured with an intermediate frequency receiving port, a high frequency receiving port, an intermediate frequency output port, and a high frequency output port, and accordingly, the filter circuit 30 may further perform filtering processing on the preset intermediate frequency signal and the preset high frequency signal and output the signals to the intermediate frequency receiving end and the high frequency receiving port of the first receiving circuit 40, where the intermediate frequency output port and the high frequency output port are respectively connected to the radio frequency transceiver 10, and the first receiving circuit 40 further includes:

the third receiving and amplifying module 430 is respectively connected to the intermediate frequency receiving port and the intermediate frequency output port, and is configured to receive and amplify the preset intermediate frequency signal filtered by the filter circuit; the fourth receiving and amplifying module 440 is respectively connected to the high-frequency receiving port and the high-frequency output port, and is configured to receive and amplify the preset high-frequency signal filtered by the filter circuit. Thus, the third receiving amplifying module 430 and the fourth receiving amplifying module 440 can receive the preset intermediate frequency signal and the preset high frequency signal of the first receiving circuit 40. The first receiving circuit 40 may be understood as an External Low Noise Amplifier (ela).

Optionally, the first receiving and amplifying module 410, the second receiving and amplifying module 420, the third receiving and amplifying module 430, and the fourth receiving and amplifying module 440 may each include a low noise amplifier and a multi-channel selection switch, and the multi-channel selection switch may be configured to connect a radio frequency path between the low noise amplifier and each of the filtering modules connected thereto.

Optionally, the number of the third receiving and amplifying modules 430 and the fourth receiving and amplifying modules 440 may also be set to be multiple, so as to further implement the receiving of multiple preset intermediate frequency signals and multiple preset high frequency signals. Accordingly, the number of intermediate frequency receiving ports (e.g., MB0 IN0, MB0 IN1, MB 1IN 0, MB1 in1.), intermediate frequency output ports (e.g., MB0 OUT0, MB0 OUT1, MB1 OUT0, MB1 OUT 1.), high frequency receiving ports (e.g., HB0 IN0, HB0 IN1, HB1IN 0, hb1in1.) and high frequency output ports (e.g., HB0 OUT0, HB0 OUT1, HB1 OUT0, HB1 OUT 1.) may each be plural. The plurality of high-frequency receiving ports are respectively connected to a plurality of high-frequency receiving ports (e.g., HBRX1, HBRX2, HBRX3, and HBRX 4) of the transmission amplification circuit 20, and are used for receiving and amplifying a plurality of preset high-frequency signals.

In one embodiment, as shown in fig. 12, the second receiving circuit 50 includes:

the third filtering module 510 is respectively connected to the radio frequency transceiver 10 and the third antenna ANT3, and configured to perform filtering processing on the low-frequency signal received by the third antenna ANT 3; an input end of the fifth receiving and amplifying module 520 is connected to the third filtering module 510, and an output end of the fifth receiving and amplifying module 520 is connected to the radio frequency transceiver 10, for amplifying the low frequency signal after filtering.

The fourth filtering module 530 is respectively connected to the radio frequency transceiver 10 and the fourth antenna ANT4, and configured to perform filtering processing on the low-frequency signal received by the fourth antenna ANT 4; an input end of the sixth receiving and amplifying module 540 is connected to the fourth filtering module 530, and an output end of the sixth receiving and amplifying module 540 is connected to the radio frequency transceiver 10, and is configured to amplify the low-frequency signal after filtering.

The third filtering module 510 and the fourth filtering module 530 may each be a filter, and the fifth receiving and amplifying module 520 and the sixth receiving and amplifying module 540 may each include a low noise amplifier and a multi-channel selection switch. The third filtering module 510 and the fifth receiving and amplifying module 520 may perform filtering processing and amplifying processing on the low-frequency signal received by the third antenna ANT3, and output the low-frequency signal after the filtering processing and amplifying processing to the radio frequency transceiver 10, so as to implement diversity reception; the fourth filtering module 530 and the sixth receiving and amplifying module 540 may perform filtering processing and amplifying processing on the low frequency signal received by the fourth antenna ANT4, and output the low frequency signal after the filtering processing and amplifying processing to the radio frequency transceiver 10, thereby implementing diversity MIMO reception.

Optionally, the fifth receiving and amplifying module 520 and the sixth receiving and amplifying module 540 form an integrated circuit 500, the integrated circuit 500 is configured with a first low frequency receiving port, a second low frequency receiving port, a first low frequency output port and a second low frequency output port, wherein the first low frequency receiving port is connected to the third filtering module 510, the second low frequency receiving port is connected to the fourth filtering module 530, the first low frequency output port and the second low frequency output port are respectively connected to the radio frequency transceiver 10, and the fifth receiving and amplifying module 520 is respectively connected to the first low frequency receiving port and the first low frequency output port; the sixth receiving and amplifying module 540 is connected to the second low frequency receiving port and the second low frequency output port, respectively. By integrating the fifth receiving amplifying module 520 and the sixth receiving amplifying module 540, the integration level of the device can be improved, and the purposes of reducing cost, reducing area and improving performance can be achieved.

Optionally, the integrated circuit 500 is further configured with an intermediate frequency receiving port, a high frequency receiving port, an intermediate frequency output port, and a high frequency output port, and accordingly, the second receiving circuit 50 further includes a plurality of external filtering modules, inputs of the plurality of filtering modules are respectively connected to the antennas, outputs of the plurality of filtering modules are respectively connected to the intermediate frequency receiving port and the high frequency receiving port in a one-to-one correspondence, the intermediate frequency output port and the high frequency output port are respectively connected to the radio frequency transceiver 10, and the integrated circuit 500 further includes:

a seventh receiving and amplifying module 550, respectively connected to the intermediate frequency receiving port and the intermediate frequency output port, for receiving and amplifying the preset intermediate frequency signal filtered by the filtering module; the eighth receiving and amplifying module 560 is respectively connected to the high-frequency receiving port and the high-frequency output port, and is configured to receive and amplify the preset high-frequency signal filtered by the filtering module. Thus, the seventh receiving and amplifying module 550 and the eighth receiving and amplifying module 560 can receive the preset intermediate frequency signal and the preset high frequency signal of the second receiving circuit 50. The second receiving circuit 50 may be an External Low Noise Amplifier (ela).

Optionally, the fifth receiving and amplifying module 520, the sixth receiving and amplifying module 540, the seventh receiving and amplifying module 550, and the eighth receiving and amplifying module 560 may each include a low noise amplifier and a multi-channel selection switch, and the multi-channel selection switch may be configured to connect a radio frequency path between the low noise amplifier connected thereto and each of the filtering modules.

Optionally, the number of the seventh receiving and amplifying module 550 and the eighth receiving and amplifying module 560 may also be set to be multiple, so as to further implement receiving of multiple preset intermediate frequency signals and multiple preset high frequency signals. Accordingly, the number of intermediate frequency receiving ports (e.g., MB0 IN0, MB0 IN1, MB 1IN 0, MB1 in1.), intermediate frequency output ports (e.g., MB0 OUT0, MB0 OUT1, MB1 OUT0, MB1 OUT 1.), high frequency receiving ports (e.g., HB0 IN0, HB0 IN1, HB1IN 0, hb1in1.) and high frequency output ports (e.g., HB0 OUT0, HB0 OUT1, HB1 OUT0, HB1 OUT 1.) may each be plural. The plurality of high-frequency receiving ports are respectively connected to a plurality of high-frequency receiving ports (e.g., HBRX1, HBRX2, HBRX3, and HBRX 4) of the transmission amplification circuit 20, and are used for receiving and amplifying a plurality of preset high-frequency signals.

Based on the rf system shown in fig. 13, the preset low frequency signal is taken as an example of an N28A frequency band signal, and the working principle thereof is explained:

first transmit TX1 link:

the transmission signal is output from the radio frequency transceiver 10, enters the low frequency power amplifier LB PA 1in the first power amplification module 210 through the port LB1 RFIN of the radio frequency line to the transmission amplification circuit 20, is amplified, and is output to the port LB1 through the SP5T #1 switch; the filtered signal is transmitted to the first filtering module 310 through the Path03, and then transmitted to the TRX7 port of the third gating module 370 through the Path02 and then output to the first antenna port LB ANT1 through the first coupling module 330; via Path01 to the first antenna ANT1.

Second transmit TX2 link:

the transmission signal is output from the radio frequency transceiver 10, enters the low frequency power amplifier LB PA2 in the second power amplification module 220 through the port LB0 RFIN of the radio frequency line to the transmission amplification circuit 20, and is output to the port LB0 after the signal is amplified; the Path of the Path06 is passed to the second coupling module 340, the Path of the Path05 is passed to the second antenna ANT2 after the filtering processing of the second filtering module 320.

The primary set receives the PRX link:

a received signal is input from the first antenna ANT1, transmitted to the third gating module 370 through the Path01 and the first coupling module 330, and transmitted to the first filtering module 310 of the filtering circuit 30 through the Path 02; via Path01 to the first receive amplifying module 410, after amplification, the amplified signal is output to the rf transceiver 10 through the port LB1 OUT.

Primary set MIMO receive (PRX MIMO) link:

a received signal is input from the second antenna ANT2 and is transmitted to the second filtering module 320 through a Path 05; after the filtering process, the signal is transmitted to the second receiving and amplifying module 420 through the Path07 for amplification, and then is output to the rf transceiver 10 through the port LB0 OUT.

Diversity reception DRX link:

the received signal is input from the third antenna ANT3, transmitted to the third filtering module 510 and the fifth receiving and amplifying module 520 through the Path08, and output to the radio frequency transceiver 10 through the port LB1 OUT after being filtered and amplified.

Diversity MIMO reception (DRX MIMO) link:

the received signal is input from the fourth antenna ANT4, transmitted to the fourth filtering module 530 and the sixth receiving and amplifying module 540 via the Path09, and output to the rf transceiver 10 via the port LB0 OUT after being filtered and amplified.

FBRX Link of first coupled Signal of N28 TX1

When the forward power is detected, in DPDT #1, contact 1 is tangent to contact 2, contact 3 is tangent to contact 4; when reverse power is detected, in DPDT #1, contact 1 is tangent to contact 4, and contact 3 is tangent to contact 2; via Path10 to a first gating module 350 (SPDT switch); the SPDT switch is tangential to the single port and the first coupled signal enters the if transceiver 10 via Path12 Path.

FBRX Link of the second coupled Signal of N28 TX2

When forward power is detected, in DPDT #2, a contact 1 is tangent to a contact 2, and a contact 3 is tangent to a contact 4; when the reverse power is detected, in the DPDT #2, the contact 1 is tangent to the contact 4, and the contact 3 is tangent to the contact 2; via Path11 to the first gating module 350 (SPDT switch); the SPDT switch is tangential to the single port and the second coupled signal enters the if transceiver 10 via Path 12.

Based on the rf system shown in fig. 14, the preset low frequency signal is taken as an example of an N28A frequency band signal, so as to explain the working principle:

first transmit TX1 link:

the transmission signal is output from the radio frequency transceiver 10, enters the low frequency power amplifier LB PA 1in the first power amplification module 210 through the port LB1 RFIN of the radio frequency line to the transmission amplification circuit 20, is amplified, and is output to the port LB1 through the SP5T #1 switch; the filtered signal is transmitted to the first filtering module 310 through the Path03 and then transmitted to the TRX7 port of the second gating module 360 through the Path02 and then output to the first antenna port LB ANT1 through the first coupling module 330; via Path01 to the first antenna ANT1.

Second transmit TX2 link:

the transmission signal is output from the radio frequency transceiver 10, enters the low frequency power amplifier LB PA2 in the second power amplification module 220 through the port LB0 RFIN of the radio frequency line to the transmission amplification circuit 20, and is output to the port LB0 after the signal is amplified; the Path of the Path06 is connected to the second filtering module 320, the TRX13 port of the second gating module 360, the second coupling module 340, and the Path of the Path05 is connected to the second antenna ANT2.

The primary set receives the PRX link:

a received signal is input from the first antenna ANT1, transmitted to the second gating module 360 through the Path01 and the first coupling module 330, and transmitted to the first filtering module 310 of the filtering circuit 30 through the Path 02; via Path01 to the first receive amplifying module 410, after amplification, the amplified signal is output to the rf transceiver 10 through the port LB1 OUT.

Primary set MIMO reception (PRX MIMO) link:

a received signal is input from a second antenna ANT2 and is transmitted to the second coupling module 320, the second gating module 360 and the second filtering module 320 through a Path 05; after the filtering process, the signal is transmitted to the second receiving and amplifying module 420 through the Path07 for amplification, and then is output to the rf transceiver 10 through the port LB0 OUT.

For the diversity reception DRX link, the diversity MIMO reception (DRX MIMO) link, the FBRX link for the first coupling signal of N28 TX1, and the FBRX link for the second coupling signal of N28 TX2 in the radio frequency system in fig. 14, reference is made to the relevant description in fig. 13, and details are not repeated here.

Based on the radio frequency system as shown in fig. 15, the first transmit TX1 link, the second transmit TX2 link, the primary set receive PRX link, the primary set MIMO receive (PRX MIMO) link, the diversity receive DRX link, the diversity MIMO receive (DRX MIMO) link, the FBRX link for the first coupled signal of N28 TX1, and the FBRX link for the second coupled signal of N28 TX2 refer to the related descriptions in fig. 13 and fig. 14, which are not repeated herein.

The embodiment of the application also provides communication equipment, and the communication equipment is provided with the radio frequency system in any embodiment. By arranging the radio frequency system on the communication equipment, 4 x 4MIMO reception of preset low-frequency signals can be realized, and the throughput of the low-frequency signals can be improved by times under the condition of not increasing frequency spectrum resources and antenna transmitting power; the download rate can be improved to improve the user experience, and meanwhile, when the communication equipment is positioned at the edge of a cell, deep in a building, in an elevator and other weak signal environments, the 4 x 4MIMO receiving mode is adopted, so that higher diversity gain and larger coverage distance are achieved; the device has high integration level, the area of the substrate occupied by each device in the radio frequency system is reduced, meanwhile, the layout and wiring can be simplified, and the cost is saved.

As shown in fig. 16, further taking the communication device as a mobile phone 11 for illustration, specifically, as shown in fig. 16, the mobile phone 11 may include a memory 21 (which optionally includes one or more computer-readable storage media), a processor 22, a peripheral interface 23, a radio frequency system 24, and an input/output (I/O) subsystem 26. These components optionally communicate over one or more communication buses or signal lines 29. Those skilled in the art will appreciate that the handset 11 shown in fig. 16 is not intended to be limiting and may include more or fewer components than shown, or some components may be combined, or a different arrangement of components. The various components shown in fig. 16 are implemented in hardware, software, or a combination of both hardware and software, including one or more signal processing and/or application specific integrated circuits.

The memory 21 optionally includes high-speed random access memory, and also optionally includes non-volatile memory, such as one or more magnetic disk storage devices, flash memory devices, or other non-volatile solid-state memory devices. Illustratively, the software components stored in memory 21 include an operating system 211, a communication module (or set of instructions) 212, a Global Positioning System (GPS) module (or set of instructions) 213, and the like.

The processor 22 and other control circuitry, such as control circuitry in the radio frequency system 24, may be used to control the operation of the handset 11. The processor 22 may be based on one or more microprocessors, microcontrollers, digital signal processors, baseband processors, power management units, audio codec chips, application specific integrated circuits, etc.

The processor 22 may be configured to implement a control algorithm that controls the use of the antenna in the handset 11. The processor 22 may also issue control commands for controlling various switches in the radio frequency system 24, and the like.

The I/O subsystem 26 couples input/output peripheral devices on the cell phone 11, such as a keypad and other input control devices, to the peripheral device interface 23. The I/O subsystem 26 optionally includes a touch screen, keys, tone generators, accelerometers (motion sensors), ambient and other sensors, light emitting diodes and other status indicators, data ports, and the like. Illustratively, a user may control the operation of the handset 11 by supplying commands through the I/O subsystem 26, and may receive status information and other output from the handset 11 using the output resources of the I/O subsystem 26. For example, a user pressing button 261 may turn the phone on or off.

The rf system 24 may be the rf system of any of the previous embodiments.

The above examples only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent application shall be subject to the appended claims.

Claims

1. A radio frequency system, comprising:

a radio frequency transceiver;

the first receiving circuit is respectively connected with the radio frequency transceiver and the filter circuit and is used for receiving the main set of the preset low-frequency signals received by the first antenna and filtered by the filter circuit and receiving the main set of the preset low-frequency signals received by the second antenna and filtered by the filter circuit;

the second receiving circuit is respectively connected with the radio frequency transceiver, the third antenna and the fourth antenna and is used for diversity reception of the preset low-frequency signal received by the third antenna and diversity MIMO reception of the preset low-frequency signal received by the fourth antenna;

wherein the filter circuit comprises:

the two first ends of the first filtering module are respectively connected with the transmitting amplifying circuit and the first receiving circuit in a one-to-one correspondence manner, and the second end of the first filtering module is connected with the first antenna and is used for filtering the preset low-frequency signal amplified by the transmitting amplifying circuit and outputting the signal to the first antenna, and filtering the preset low-frequency signal received by the first antenna and outputting the signal to the first receiving circuit;

the second filtering module is connected with the second antenna, and is used for filtering the preset low-frequency signal amplified by the transmitting amplifying circuit and outputting the preset low-frequency signal to the second antenna, and filtering the preset low-frequency signal received by the second antenna and outputting the preset low-frequency signal to the first receiving circuit;

the input end of the first coupling module is connected with the first filtering module, and the output end of the first coupling module is connected with the first antenna, so that the first coupling module is used for coupling the preset low-frequency signal in a radio frequency path between the first filtering module and the first antenna to output a first coupling signal to the radio frequency transceiver through a coupling output end;

the input end of the second coupling module is connected with the second filtering module, and the output end of the second coupling module is connected with the second antenna, so that the second coupling module is used for coupling the preset low-frequency signal in the radio frequency path between the second filtering module and the second antenna, and outputting a second coupling signal to the radio frequency transceiver through the coupling output end.

2. The radio frequency system of claim 1, wherein the filter circuit further comprises:

the first gating module is connected with the coupling output end of the first coupling module and the coupling output end of the second coupling module in a one-to-one correspondence mode, the second gating module is connected with the radio frequency transceiver and used for selectively conducting a radio frequency path between the first coupling module and the radio frequency transceiver so as to output the first coupling signal to the radio frequency transceiver and selectively conducting a radio frequency path between the second coupling module and the radio frequency transceiver so as to output the second coupling signal to the radio frequency transceiver.

3. The radio frequency system of claim 2, wherein the filter circuit further comprises:

a second gating module, a first end of which is connected to the second end of the first filtering module, another first end of which is connected to the second end of the second filtering module, a second end of which is connected to the input end of the first coupling module, and another second end of which is connected to the input end of the second coupling module, for selectively conducting the rf path between the first filtering module and the first coupling module and the rf path between the second filtering module and the second coupling module; and the radio frequency filter is also used for selectively conducting a radio frequency path between the first filtering module and the second coupling module and a radio frequency path between the second filtering module and the first coupling module.

4. The radio frequency system according to claim 3, wherein the second gating module, the first coupling module, and the second coupling module form a first integrated circuit; wherein:

the first integrated circuit is configured with a plurality of transceiving ports, a first antenna port, a second antenna port, a first coupling port and a second coupling port, the plurality of transceiving ports are respectively connected with a second end of the first filtering module and a second end of the second filtering module in a one-to-one correspondence manner, the first antenna port is connected with the first antenna, the second antenna port is connected with the second antenna, the first coupling port is connected with a first end of the first gating module, and the second coupling port is connected with another first end of the first gating module;

a plurality of first ends of second gating module are connected a plurality ofly respectively the one-to-one the receiving and dispatching port, the output of first coupling module is connected first antenna port, the coupling output of first coupling module is connected first coupling port, the output of second coupling module is connected the second antenna port, the coupling output of second coupling module is connected the second coupling port.

5. The radio frequency system according to claim 3, wherein the first gating module, the second gating module, the first coupling module, and the second coupling module form a second integrated circuit; wherein:

the second integrated circuit is configured with a plurality of transceiving ports, a first antenna port, a second antenna port and a third coupling port, the plurality of transceiving ports are respectively connected with the second end of the first filtering module and the second end of the second filtering module in a one-to-one correspondence manner, the first antenna port is connected with the first antenna, the second antenna port is connected with the second antenna, and the third coupling port is connected with the radio frequency transceiver;

the first ends of the second gating modules are respectively connected with the receiving and transmitting ports in a one-to-one correspondence mode, the output end of the first coupling module is connected with the first antenna port, the output end of the second coupling module is connected with the second antenna port, and the second end of the first gating module is connected with the third coupling port.

6. The radio frequency system according to claim 4 or 5, wherein the preset low frequency signal comprises radio frequency signals of a plurality of low frequency bands; wherein:

the number of the first filtering modules is multiple, two first ends of each first filtering module are respectively connected with the transmitting amplifying circuit and the first receiving circuit in a one-to-one correspondence manner, a second end of each first filtering module is connected with one transceiving port, and the frequency bands of the preset low-frequency signals output by each first filtering module are different; and/or

The number of the second filtering modules is multiple, two first ends of each second filtering module are respectively connected with the transmitting amplifying circuit and the first receiving circuit in a one-to-one correspondence mode, a second end of each second filtering module is connected with another receiving and transmitting port, and the frequency bands of the preset low-frequency signals output by the second filtering modules are different.

7. The radio frequency system according to claim 2, wherein the predetermined low frequency signal comprises a plurality of low frequency band radio frequency signals; the number of the first filtering modules is multiple, two first ends of each first filtering module are respectively connected with the transmitting amplifying circuit and the first receiving circuit in a one-to-one correspondence manner, and the frequency bands of the preset low-frequency signals output by each first filtering module are different; the filter circuit further includes:

and the first ends of the third gating module are respectively connected with the second ends of the first filtering modules in a one-to-one correspondence manner, and the second end of the third gating module is connected with the input end of the first coupling module and is used for gating a radio frequency path between the first filtering module and the first antenna.

8. The RF system according to claim 7, wherein the first coupling module and the third gating module form a third IC, the third IC is configured with a plurality of transceiving ports, a first antenna port and a first coupling port, the transceiving ports are respectively connected to the second ends of the first filtering modules in a one-to-one correspondence, the first antenna port is connected to the first antenna, and the first coupling port is connected to a first end of the first gating module; wherein:

the first ends of the third gating module are respectively connected with the receiving and transmitting ports in a one-to-one correspondence manner, and the coupling output end of the first coupling module is connected with the first coupling port.

9. The radio frequency system according to claim 1, wherein the preset low frequency signal comprises a plurality of low frequency band radio frequency signals; the number of the second filtering modules is multiple, two first ends of each second filtering module are respectively connected with the transmitting amplifying circuit and the first receiving circuit in a one-to-one correspondence manner, and the frequency bands of the preset low-frequency signals output by each second filtering module are different; the filter circuit further includes:

and the first ends of the fourth gating module are respectively connected with the second ends of the second filtering modules in a one-to-one correspondence manner, and the second end of the fourth gating module is connected with the input end of the second coupling module and is used for gating a radio frequency path between the second filtering module and the second antenna.

10. The rf system according to claim 9, wherein the second coupling module and the fourth gating module form a fourth integrated circuit, the fourth integrated circuit is configured with a plurality of transceiving ports, a second antenna port and a second coupling port, the transceiving ports are respectively connected to the second ends of the second filtering modules in a one-to-one correspondence, the second antenna port is connected to the second antenna, and the second coupling port is connected to a first end of the fourth gating module; wherein:

a plurality of first ends of the fourth gating module are respectively connected with the plurality of transceiving ports in a one-to-one correspondence manner, and a coupling output end of the second coupling module is connected with the second coupling port.

11. The rf system of claim 1, wherein the transmitting and amplifying circuit is configured with a first low frequency input port, a second low frequency input port, a first low frequency output port, and a second low frequency output port, the first low frequency input port and the second low frequency input port are respectively connected to the rf transceiver, the first low frequency output port and the second low frequency output port are respectively connected to the filter circuit, the transmitting and amplifying circuit comprising:

the input end of the first power amplification module is connected with the first low-frequency input port, and the output end of the first power amplification module is connected with the first low-frequency output port and used for performing power amplification on the preset low-frequency signal;

and the input end of the second power amplification module is connected with the second low-frequency input port, and the output end of the second power amplification module is connected with the second low-frequency output port and used for performing power amplification on the preset low-frequency signal.

12. A communication device comprising a radio frequency system according to any of claims 1-11.