CN111917429A

CN111917429A - Radio frequency front end architecture, antenna device and communication terminal

Info

Publication number: CN111917429A
Application number: CN202010722985.4A
Authority: CN
Inventors: 胡自洁; 倪建兴; 曹原; 倪楠
Original assignee: Radrock Shenzhen Technology Co Ltd
Current assignee: Radrock Shenzhen Technology Co Ltd
Priority date: 2020-07-24
Filing date: 2020-07-24
Publication date: 2020-11-10
Anticipated expiration: 2040-07-24
Also published as: WO2022017404A1; CN113225095A; CN111917429B; CN113225095B

Abstract

In order to solve the problem that the architecture formed by a radio frequency front end module in the prior art is relatively complex, the invention provides a radio frequency front end architecture, an antenna device and a communication terminal. The invention provides a radio frequency front end architecture, which is provided with more than two broadband radio frequency processing links; the broadband radio frequency processing link comprises an amplifier unit and a multi-band adjustable filtering unit. An amplifier unit and a multi-band adjustable filtering unit are arranged in more than two broadband radio frequency processing links in a radio frequency front end framework of an antenna module; therefore, in 5G application, for example, the system can work in different working modes, can support signal transmission of various different modes, can further simplify the structure of the radio frequency front end architecture, simplifies the structure, reduces the complexity of design and reduces the area of the radio frequency front end architecture.

Description

Radio frequency front end architecture, antenna device and communication terminal

Technical Field

The invention relates to the field of wireless communication systems of communication terminals, in particular to an antenna device on a communication terminal, and further relates to a radio frequency front end architecture in the antenna device.

Background

With the development and application of the fifth generation mobile communication technology (5G), the smart device, especially the 5G technology in the mobile terminal, faces new challenges. The realization of the technical advantages of faster network transmission speed, greater network capacity and lower network delay in the 5G technology requires further optimization of the 5G antenna technology. As shown in fig. 1, communication terminal 1000 implements wireless communication with antenna device 200 of base station 2000 through built-in antenna device 100. In general, antenna device 100 of communication terminal 1000 includes a plurality of antennas, and a multiple-input multiple-output (MIMO) technique is used to form an antenna system having a plurality of channels between transmission and reception using a plurality of antennas at both transmission and reception ends of antenna device 100. In 5G communication of a mobile terminal, data transmission of a plurality of frequency bands (such as N77 and N79) needs to be realized by 1T4R, 2T4R and the like. The antenna device 100 on the communication terminal 1000 may receive N77 and transmit N77, and in order to support the implementation of 1T4R, 2T4R, etc., additional antennas and corresponding transmit and/or receive chains need to be added, which increases the complexity of circuit design and inevitably increases the area of the rf front-end architecture.

As shown in fig. 2, the conventional antenna apparatus generally includes a baseband module 4, an rf transceiver module 2, an rf front-end architecture, and an antenna link module 3; the baseband module 4 is used for performing digital baseband signal processing and performing encoding and decoding of digital baseband signals; the radio frequency transceiver module 2 is used for performing conversion between a digital base frequency and an analog radio frequency signal, processing the digital base frequency signal sent by the base band module into a radio frequency analog signal and then sending the radio frequency analog signal to the radio frequency front end architecture, or receiving the radio frequency analog signal transmitted by the radio frequency front end architecture, converting the radio frequency analog signal into a digital base frequency signal and sending the digital base frequency signal to the base band module 4; the radio frequency front end architecture selects to send radio frequency analog signals to the antenna link module 3 or receive radio frequency analog signals from the antenna link module 3, and amplification, filtering and other processing of the radio frequency analog signals are achieved. The antenna link module 3 includes an external antenna to receive or transmit the radio frequency analog signal.

At present, a plurality of radio frequency processing links are arranged in an existing radio frequency front end architecture, and in each radio frequency processing link, a specific frequency segment, for example, a radio frequency signal of N77 or N79, can be processed by selecting the specific frequency segment in the radio frequency processing link, but in this way, a module of the radio frequency front end architecture needs a complex architecture formed by a plurality of radio frequency front end modules, so as to realize the round sending and receiving of signals of the plurality of frequency segments. The rf front end architecture is relatively complex and requires further refinement.

Disclosure of Invention

In order to solve the problem that the architecture formed by a radio frequency front end module in the prior art is relatively complex, the invention provides a radio frequency front end architecture, an antenna device and a communication terminal.

The invention provides a radio frequency front end architecture, which is provided with more than two broadband radio frequency processing links;

the broadband radio frequency processing link comprises an amplifier unit and a multi-band adjustable filtering unit;

the amplifier unit supports signal amplification of at least two frequency bands in the same communication standard, and the multi-band adjustable filtering unit is used for filtering radio-frequency signals transmitted in the broadband radio-frequency processing link; the multi-band adjustable filtering unit comprises at least three working modes, in each working mode, the multi-band adjustable filtering unit supports the signal passing in a frequency band, wherein each frequency band at least partially corresponds to at least one frequency band supported by the amplifier unit.

Another aspect of the present invention provides an antenna apparatus, which includes a baseband module, a radio frequency transceiver module, a radio frequency front end frame, and an antenna link module.

In another aspect, the present invention provides a communication terminal, which includes the above antenna device.

In the communication terminal provided by the embodiment of the invention, the amplifier unit and the multi-band adjustable filtering unit are arranged in more than two broadband radio frequency processing links in the radio frequency front end architecture of the antenna module; therefore, in 5G application, for example, the system can work in different working modes, can support signal transmission of various different modes, can further simplify the structure of the radio frequency front end architecture, simplifies the structure, reduces the complexity of design and reduces the area of the radio frequency front end architecture.

Drawings

Fig. 1 is a schematic diagram of a communication terminal in which an internal antenna device communicates with an internal antenna device of a base station;

fig. 2 is a schematic diagram of a frame of the antenna device;

FIG. 3 is a schematic diagram of a radio frequency front end module framework provided in an embodiment of the present invention;

FIG. 4 is a schematic diagram of a multi-band tunable filter unit provided in an embodiment of the present invention;

fig. 5 is a schematic diagram of a preferred antenna assembly frame provided in an embodiment of the present invention;

fig. 6 is a schematic diagram of a frame of another preferred antenna arrangement provided in an embodiment of the present invention;

FIG. 7 is a schematic diagram of a frequency spectrum of a multi-band tunable filter unit provided in an embodiment of the present invention;

FIG. 8 is a diagram illustrating a manner of selecting a frequency spectrum of a multi-band adjustable filtering unit to reduce interference according to an embodiment of the present invention;

FIG. 9 is a diagram illustrating a second method for selecting a frequency spectrum of a multi-band adjustable filtering unit to reduce interference according to an embodiment of the present invention;

fig. 10 is a detailed schematic diagram of an rf front end architecture according to an embodiment of the present invention;

fig. 11 is a detailed schematic diagram of a further preferred rf front end architecture provided in the embodiments of the present invention.

1000, a communication terminal; 2000. a base station; 100. an antenna device (within a communication terminal); 200. an antenna device (within a base station);

1. a radio frequency front end module; 2. a radio frequency transceiver module; 3. an antenna link module; 4. a baseband module;

19. a broadband radio frequency processing link; 19a, a multi-band adjustable filtering unit; 19b, an amplifier unit; 191. a first wideband radio frequency processing link; 19N, an Nth broadband radio frequency processing link; 10. a switch selection module; 19a1, multiband band-pass filter; 19a2, a first switch; 19a3, a first frequency adjustment module; 19a4, second switch; 19a5, a second frequency adjustment module;

1A, a first radio frequency front end module; 1B, a second radio frequency front end module; 1C, a third radio frequency front end module;

11. a radio frequency power amplifier module; 12. a radio frequency transmit-receive switch; 13. a main antenna switch selection module; 14. a multi-band main filter; 15. a port selection module; 16. a secondary antenna switch selection module; 17. a secondary low noise amplifier; 18. a multi-band secondary filter;

11a, a first radio frequency power amplifier module; 11b, a second radio frequency power amplifier module; 12a, a first radio frequency transceiving switch; 12b, a second radio frequency transceiving switch; 14a, a first main filter; 14b, a second main filter;

111. a main low noise amplifier; 112. a power amplifier; 113. a matching network;

111a, a first low noise amplifier; 111b, a second low noise amplifier; 112a, a first power amplifier; 112b, a second power amplifier; 113a, a first matching network; 113b, a second matching network;

171. a third low noise amplifier; 172. a fourth low noise amplifier; 181. a first secondary filter; 182. a second secondary filter;

31. a first main antenna; 32. a second main antenna; 33. a first secondary antenna; 34. a second secondary antenna;

311. a first external duplexer; 321. a second external duplexer; 331. a third external duplexer; 341. a fourth external duplexer;

RX1, a first receive port; RX2, a second receive port; RX3, third receive port; RX4, fourth receive port; TX1, a first transmit port; TX2, a second transmit port;

t11, a first primary antenna port; t12, a second primary antenna port; t13, a third primary antenna port; t14, fourth primary antenna port; t15, fifth primary antenna port; RT11, a first primary transceiving port; RT12 and a second main transceiving port; AUX1, a first peripheral port;

t21, a first secondary antenna port; t22, a second secondary antenna port; t23, a third secondary antenna port; r21, a first secondary receive port; r22, a second secondary receive port; RT21, a first secondary transceiving port; RT22, second secondary transceiving port.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, it is to be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Examples

The present embodiment specifically explains the communication terminal 1000, the antenna device 100 and the rf front end architecture disclosed in the present invention.

As shown in fig. 1, a communication terminal 1000 according to the present embodiment is provided that realizes wireless communication with an antenna device 200 in a base station 2000 through an internal antenna device 100. The antenna device 100 in the communication terminal 1000 implements, through its internal modules, external transmission of radio frequency signals in a relevant frequency band, and reception of radio frequency signals in a relevant frequency band transmitted by the antenna device 200 on the base station 2000. Of course, the communication terminal 1000 may include not only the antenna apparatus 100, but also other modules, such as a processor, a user interface, a memory, and the like. The communication terminal is, for example, a Personal Digital Assistant (PDA), a cellular phone, a card in a notebook computer, a wireless tablet computer, or the like. In this example, antenna device 100 will be described below only with respect to the angle of view of communication terminal 1000.

As shown in fig. 2, the antenna apparatus 100 in this example also includes a baseband module 4, an rf transceiver module 2, an rf front-end architecture and an antenna link module 3; the baseband module 4 is used for performing digital baseband signal processing and performing encoding and decoding of digital baseband signals; the radio frequency transceiver module 2 is configured to perform conversion between a digital baseband signal and an analog radio frequency signal, process the digital baseband signal sent by the baseband module 4 into a radio frequency analog signal, and send the radio frequency analog signal to a radio frequency front end architecture (the radio frequency front end architecture generally includes the radio frequency front end module 1 indicated in one or more legends), or receive the radio frequency analog signal transmitted by the radio frequency front end architecture, convert the radio frequency analog signal into a digital baseband signal, and send the digital baseband signal to the baseband module 4; the radio frequency front end architecture selects to send radio frequency analog signals to the antenna link module 3 or receive radio frequency analog signals from the antenna link module 3, and amplification, filtering and other processing of the radio frequency analog signals are achieved. The antenna link module 3 includes an external antenna to receive or transmit the radio frequency analog signal. The key point in this example is to improve the wideband rf processing link 19 in the rf front-end architecture, and the filter thereof adopts a multiband filtering processing unit, which will be described in detail below, and the application thereof is specifically explained by the specific rf front-end architecture.

As shown in fig. 3, this example discloses a radio frequency front end architecture, which is provided with more than two wideband radio frequency processing links 19; it is to be understood that the rf front-end architecture in this example may also include other existing conventional rf processing links; the conventional radio frequency processing unit also comprises various amplifying units, filters and other devices; it should be considered as falling within the scope of the present application as long as the rf front-end architecture includes more than 2 improved wideband rf processing links 19 of the present application. The radio frequency front end architecture comprises more than one radio frequency front end module; the two or more wideband rf processing links 19 may be distributed in one rf front-end module, or may be respectively included in a plurality of rf front-end modules. As shown in fig. 3, a rf front-end module includes N wideband rf processing links 19, which are respectively referred to as first wideband rf processing links 191, … …, nth wideband rf processing link 19N;

the broadband radio frequency processing link 19 comprises an amplifier unit 19b and a multiband adjustable filtering unit 19 a;

the amplifier unit 19b supports signal amplification of at least two frequency bands (or called frequency bands) in the same communication standard, and the multiband adjustable filter unit 19a is configured to perform filtering processing on the radio frequency signal transmitted in the wideband radio frequency processing link 19; the multi-band adjustable filtering unit 19a comprises at least three operation modes, in each of which the multi-band adjustable filtering unit 19a supports the passing of signals within a frequency band, wherein each of the frequency bands at least partially corresponds to at least one frequency band supported by the amplifier unit 19 b.

The same communication standard, such as 5G/NR (global 5G standard for brand new aperture design), LTE (Long Term Evolution), CDMA (Code Division multiple access), etc., is not described herein again. Preferably, the same communication standard supported by the amplifier unit 19b is 5G/NR. The amplifier unit supports signal amplification of at least two frequency bands (N77 and N79 or N78 and N79), for example. At least two frequency bands of different frequency bands supported by the amplifier unit are frequency bands without frequency overlapping or covering.

The multi-band adjustable filtering unit is used for filtering the radio frequency signal transmitted in the broadband radio frequency processing link; the multi-band adjustable filtering unit comprises at least three working modes, in each working mode, the multi-band adjustable filtering unit supports the signal passing in a frequency band, wherein each frequency band at least partially corresponds to at least one frequency band supported by the amplifier unit. In particular, the different operating modes of the multiband adjustable filter unit are matched to the corresponding amplifier units. For example, if the amplifier unit supports signal amplification of two frequency bands (a first frequency band and a second frequency band) in the same communication standard, the multi-band adjustable filtering unit includes three operation modes: the multi-band adjustable filtering unit supports the signal in a first frequency band to pass through; the multi-band adjustable filtering unit supports the signal in the second frequency band to pass through; and in a third working mode, the multi-band adjustable filtering unit supports the signals in the first frequency band and the second frequency band to pass through. I.e. the frequency band supported in each mode of operation in the multi-band adjustable filtering unit corresponds at least partly to at least one frequency band supported by said amplifier unit. It is to be understood that the frequency band supported in each operating mode of the multi-band adjustable filter unit only needs to comprise at least one frequency band supported by said amplifier unit. For example, if the first frequency band supported by the amplifier unit is the N77 frequency band (3.3GHz to 4.2GHz), the frequency band supported by the filter corresponding to the operating mode may be a frequency band at least including the N77 frequency band, for example: 3.3 GHz-4.2 GHz, 3.3 GHz-4.3 GHz or 3.3 GHz-4.4 GHz and the like.

For example, if the frequency bands supported by the amplifier unit are N77 and N79, the frequency bands supported by the three operation modes of the multi-band adjustable filter unit may be:

3.3 GHz-4.2 GHz, 4.4 GHz-5.0 GHz and 3.3 GHz-5.0 GHz;

or 3.3 GHz-4.3 GHz, 4.4 GHz-5.0 GHz and 3.3 GHz-5.0 GHz;

or 3.3 GHz-4.2 GHz, 4.3 GHz-5.0 GHz, 3.3 GHz-5.0 GHz and the like.

In one embodiment, if the frequency bands supported by the amplifier unit are N77, N78, and N79, the multi-band adjustable filter unit may include four operation modes: a first working mode, wherein the multi-band adjustable filtering unit supports the signal passing in the N77 frequency band; a second working mode, wherein the multi-band adjustable filtering unit supports the signal passing in the N78 frequency band; a third working mode, wherein the multi-band adjustable filtering unit supports the signal passing in the N79 frequency band; in a fourth operation mode, the multi-band adjustable filtering unit supports the signal passing in the N77+ N79 frequency band.

By configuring the rf front-end architecture in this example, a plurality of different modes of signal transmission can be implemented, for example: the communication terminal 1000 supports dual-card dual-standby mode, wherein one amplifier unit 19b in one of the wideband rf processing links 19a supports N77/N78 band, and one amplifier unit 19b in the other wideband rf processing link 19a supports N79 band. In this operation mode, the multiband adjustable filter unit 19a corresponding to the amplifier unit 19b supporting N77/N78 is in an operation mode supporting the passing of radio frequency signals in the N77/N78 band. The multi-band adjustable filtering unit 19a corresponding to the amplifier unit 19b supporting N79 is in another operation mode, which supports passing of radio frequency signals in the N79 frequency band. In MTNR (multiple round-robin, multiple receive) mode, two amplifier units 19b support the same band of signal transmission to support MTNR mode, for example, both amplifier units support the transmission of N77 band signals, and then the corresponding filter supports the signal passing in N77 band. Further, when the amplifier unit 19b transmits a signal, if no interference occurs at this time, the filter can be put in the all-pass mode (N77/N78+ N79), and thus, the number of components connected to the circuit can be reduced, and the insertion loss can be reduced.

For example, the multiband adjustable filtering unit 19a in this example is configured to perform filtering processing on a radio frequency signal transmitted in the wideband radio frequency processing link 19; the multi-band adjustable filtering unit 19a may comprise a band-pass filter with adjustable bandwidth, and the frequency range of the bandwidth comprises at least a first frequency band and a second frequency band; the multi-band adjustable filtering unit 19a may be selected to support at least a first frequency band and/or a second frequency band.

In this example, since there are more than two wideband rf processing links 19, and the filter in each wideband rf processing link 19 is a multiband adjustable filtering unit 19a, as a preferable mode, in this example, the involved rf processing links are all wideband rf processing links 19a, and the filters in all the rf processing links adopt multiband adjustable filtering units 19 a.

The multi-band adjustable filtering unit 19a is a band-pass filter whose bandwidth can be adjusted. Since a plurality of frequency bands are supported, in other words, at least a first frequency band and a second frequency band are included, but the present invention is not limited to the above two frequency bands, and a third frequency band, a fourth frequency band, and the like can also be included. The frequency bins described above may also be selected to support a third frequency bin, a fourth frequency bin, and so on. The adjustable-bandwidth band-pass filter allows signals in a certain frequency band to pass through, and suppresses signals, interference and noise below or above the frequency band.

As shown in fig. 3, in general, the rf front-end module includes a switch selection module 10; more than two broadband radio frequency processing links 19 are connected to the switch selection module 10; the switch selection module 10 is configured to selectively switch on an antenna link module outside the rf front-end module. The antenna in the antenna link module can select the first wideband rf processing link 191, the second wideband rf processing link, or the … … nth wideband rf processing link 19N through the switch selection module 10. Further, the antennas in the antenna link module may select, through the switch selection module 10, to connect different wideband rf processing links (at least two) in the wideband rf processing links 19 to different antennas, respectively, so as to implement that the rf signals are processed by each wideband rf processing link 19 and then selectively transmitted to the outside through the antennas, or after the rf signals are received through the antennas, the switch selection module 10 selects the relevant wideband rf processing links 19 to process.

As shown in fig. 4, as an implementation manner, the multiband adjustable filtering unit 19a includes a multiband band-pass filter 19a1, a first switch 19a2, a first frequency adjusting module 19a3, a second switch 19a4, and a second frequency adjusting module 19a 5;

wherein the first frequency adjustment module 19a3 is connected to the multiband band-pass filter 19a1 through the first switch 19a2 to enable the multiband adjustable filtering unit 19a to support filtering of a first frequency band by gating the first switch 19a 2;

the second frequency adjustment block 19a5 is connected to the multiband band-pass filter 19a1 through the second switch 19a4 to enable the multiband adjustable filtering unit 19a to support filtering of the second frequency band by gating the second switch 19a 4.

In this example, the first switch 19a2 and the second switch 19a4 are responsible for accessing the first frequency adjustment module 19a3 and the second frequency adjustment module 19a 5. The multiband band-pass filter 19a1 is incorporated in the main circuit of the wideband radio frequency processing link 19. The first frequency adjustment block 19a3, the second frequency adjustment block 19a5 are used in combination with the multiband band-pass filter 19a1, so that it can be provided with the option of using a first frequency band, a second frequency band, or a combination of a first frequency band + a second frequency band.

The first frequency adjustment module 19a3 and the second frequency adjustment module 19a5 may be implemented by a chopper filter circuit, which is well known to those skilled in the communication field and will not be described in detail.

It can be understood that the multiband adjustable filter unit 19a may further be connected in parallel with more switches and corresponding branches of the frequency adjusting module in series to implement more different operating modes, which is not described herein again.

As shown in fig. 5, the rf front-end architecture in this example includes a first rf front-end module 1A and a second rf front-end module 1B; alternatively, as shown in fig. 6, the rf front end architecture may include a first rf front end module 1A, a second rf front end module 1B and a third rf front end module 1C.

Preferably, in this example, two broadband rf processing links 19 are disposed on the rf front-end architecture; the first broadband radio frequency processing link comprises a first amplifier unit and a first multiband adjustable filtering unit, and the second broadband radio frequency processing link comprises a second amplifier unit and a second multiband adjustable filtering unit;

the first amplifier unit and the second amplifier unit both support signal amplification of a first frequency band and a second frequency band in the same communication standard;

the first multiband adjustable filtering unit and the second multiband adjustable filtering unit both comprise three working modes, each working mode supports the signal passing in a frequency band, wherein each frequency band at least partially corresponds to at least one of the first frequency band and the second frequency band.

For example, as shown in fig. 7, it is assumed that the multi-band bandpass filter in the first broadband rf processing link 191 (referred to as the first link for short) supports passing signals with a frequency range between 3.3GHz and 5.0GHz, and includes a first frequency band (referred to as the first frequency band) N77(3.3GHz to 4.2GHz) and a second frequency band (referred to as the second frequency band) N79(4.4GHz to 5.0 GHz); the frequency range of the signals supported by the multi-frequency band-pass filter in the second broadband radio frequency processing link (for short, the second link) is also between 3.3GHz and 5.0GHz, and the second broadband radio frequency processing link comprises a first frequency band N77(3.3GHz to 4.2GHz) and a second frequency band N79(4.4GHz to 5.0 GHz). The above-mentioned N77 and N79 may be selectively used. For example, when the first switch 19a2 is turned on and the first frequency adjustment module 19a3 is connected to the broadband rf processing link 19, the multiband bandpass filter 19a1 combines with the first frequency adjustment module 19a3 to realize the selection of the N77 frequency band. Or when the second switch 19a4 is turned on and the second frequency adjustment module 19a5 is connected to the broadband rf processing link 19, the multiband bandpass filter 19a1 combines with the first frequency adjustment module 19a3 to realize the selection of the N79 frequency band. When the first switch 19a2 and the second switch 19a4 are both non-conductive, they can support a bandwidth range that includes the N77+ N79 frequency bin. Alternatively, the first frequency bin may be N78, the second frequency bin may be N79, in this example, the first frequency bin is N78, and the second frequency bin is N79.

As shown in fig. 8, when a signal of N77 band is transmitted in the first link, the bandwidth supported by the multi-band adjustable filter unit 19a in the first link can be adjusted to N77, and a signal of N79 band is transmitted in the second link, the bandwidth supported by the multi-band adjustable filter unit 19a in the second link is adjusted to N79. Alternatively, as shown in fig. 9, when the signal of N79 band is transmitted in the first link, the bandwidth supported by the multiband adjustable filter unit 19a in the first link may be adjusted to N79, and when the signal of N77 is transmitted in the second link, the bandwidth supported by the multiband adjustable filter unit 19a in the second link may be adjusted to N77 band.

Certainly, the rf front-end architecture includes a link frequency detection module and a frequency selection control module, the link frequency detection module is configured to detect the rf signal in each of the wideband rf processing links 19, and the frequency selection control module is configured to control on/off of the first switch 19a2 and the second switch 19a4 in the multiband adjustable filter unit 19a in each of the wideband rf processing links 19. In this way, the link frequency detection module detects the frequency of the rf signal in the wideband rf processing link 19 to switch the frequency of the multi-band filtering unit in each wideband rf processing link 19, so as to reduce the interference between the wideband rf processing links 19. Specifically, when detecting that the frequency of the rf signal in the wideband rf processing link 19 is the first frequency band, the first switch 19a2 is controlled to be turned on, so that the main circuit of the multiband bandpass filter 19a1 is connected to the first frequency adjusting module 19a3, and the combination of the two modules realizes the selection of the first frequency band. When detecting that the frequency of the rf signal in the wideband rf processing link 19 is the second frequency band, the second switch 19a4 is controlled to be turned on, so that the second frequency adjusting module 19a5 is connected to the main circuit of the multiband bandpass filter 19a1, and the combination of the two modules realizes the selection of the second frequency band.

The concepts of the present application are further explained below in conjunction with specific rf front end architectures.

As shown in fig. 10, the rf front-end architecture in this example includes a first rf front-end module 1A and a second rf front-end module 1B; the first radio frequency front end module 1A is a main radio frequency front end module, and the second radio frequency front end module 1B is an auxiliary radio frequency front end module;

the main radio frequency front end module comprises two main signal transceiving links and a main antenna switch selection module 13; the two main signal transceiving links are connected with the main antenna switch selection module 13; (but not limited to only two main signal transceiving links, there may be more main signal transceiving links)

Each main signal transceiving link comprises a radio frequency power amplifier module 11, a radio frequency transceiving switch 12 and a multi-band main filter 14 which are arranged in sequence;

the radio frequency power amplifier module 11 comprises a main low noise amplifier 111 and a power amplifier 112; the power amplifier 112 and the main low noise amplifier 111 are connected to the rf transceiving switch 12; the main low noise amplifier 111 is configured to receive the radio frequency signal transmitted from the radio frequency transceiving switch 12, amplify the radio frequency signal, and output the amplified radio frequency signal to the radio frequency transceiving module 2; the power amplifier 112 is configured to receive a radio frequency signal sent by the radio frequency transceiver module 2, amplify the radio frequency signal, and output the amplified radio frequency signal to the radio frequency transceiver switch 12; when the radio frequency power amplifier module 11 is implemented, the radio frequency power amplifier module 11 in each signal transceiver circuit may be packaged into a single chip, or the main low noise amplifiers 111 in the two radio frequency power amplifier modules 11 are integrated into a single chip, and the power amplifiers 112 in the two radio frequency power amplifier modules 11 are integrated into a single chip. It is also possible to consider that the two rf power amplifier modules 11 are integrated in one chip.

Because the radio frequency signal power output by the radio frequency transceiver module 2 is very small, it needs to obtain enough radio frequency power through a series of amplifications before being fed to the antenna for radiation. In order to obtain a sufficient rf output power, the power amplifier 112 must be used, and the power amplifier 112 is also well known to those skilled in the art and will not be described in detail.

The radio frequency transceiving switch 12 is arranged between the radio frequency power amplifier module 11 and the multiband main filter 14, and is used for switching the connection between the multiband main filter 14 and the main low noise amplifier 111 or the power amplifier 112 so as to selectively connect the multiband main filter 14 with the main low noise amplifier 111 or the power amplifier 112;

the rf transceiver switch 12 (generally referred to as T/R switch) mainly controls the switching of the receiving and transmitting states of the whole main rf front-end module, and is a key module of the main rf front-end module. The conventional rf transceiver switch 12 has many manufacturing processes, and most of the products in the market currently adopt discrete devices such as III-V processes or PIN diodes. The advantage of this type of switch is that the power consumption is lower and the isolation is better. The disadvantages are high cost, large power consumption and large occupied area. Alternatively, the rf transceiver switch 12 may be implemented by an SOI (Silicon-On-Insulator) process. With the continuous development of the process technology, the CMOS technology has the outstanding advantages of high integration level, low cost, low power consumption, etc., so that the implementation of the rf transceiver switch 12 by using the CMOS technology also becomes an alternative. As is well known to those skilled in the art.

The multiband main filter 14 is disposed between the antenna switch selection module 13 and the rf transceiver switch 12, and is configured to filter the rf signal amplified by the power amplifier 112 and transmit the filtered rf signal to the main antenna switch selection module 13, or filter the rf signal received from the main antenna switch selection module 13 and transmit the filtered rf signal to the main low noise amplifier 111; the multi-band main filter 14 is the multi-band adjustable filtering unit 19 a;

the main antenna switch selection module 13 is used for connecting and gating two main signal transceiving links and a main antenna or connecting an auxiliary radio frequency front end module;

the auxiliary radio frequency front end module comprises a port selection module 15, an auxiliary antenna switch selection module 16 and two auxiliary signal receiving links, wherein the two auxiliary signal receiving links are arranged between the port selection module 15 and the auxiliary antenna switch selection module 16;

the two secondary signal receiving links comprise a secondary low noise amplifier 17 and a multi-band secondary filter 18;

the auxiliary antenna switch selection module is used for connecting a gating auxiliary antenna or a main radio frequency front-end module and is used for receiving radio frequency signals of the main antenna or the auxiliary antenna or transmitting the radio frequency signals received by the auxiliary antenna to the main radio frequency front-end module; the multiband secondary filter 18 is used for filtering the radio frequency signal received by the secondary antenna switch selection module and then transmitting the radio frequency signal to the secondary low noise amplifier 17; the sub low noise amplifier 17 is used for receiving the radio frequency signal transmitted from the multi-band sub filter 18, amplifying the radio frequency signal and outputting the amplified radio frequency signal to the radio frequency transceiver module;

the multiband secondary filter 18 is the multiband adjustable filter unit 19 a.

It should be noted that it is not necessary to set all of the multiband main filter 14 and the multiband auxiliary filter 18 as the multiband adjustable filter unit 19 a. For example, the first sub-filter 181 is set to the adjustable bandwidth multi-band adjustable filtering unit 19a, and the second sub-filter 182 is set to a fixed bandwidth filter (N77+ N79). In this case, the first sub-filter 181 receives a control signal to adjust the bandwidth supported by the first sub-filter 181. If the first sub-signal receiving chain receives the signal of the N77 band at this time and the second sub-signal receiving chain receives the signal of the N79 band, in order to avoid signal interference, the first sub-filter 181 is controlled to be adjusted to a filter supporting the N77 band at this time. If the first sub-signal receiving chain receives the signal of the N79 band at this time and the second sub-signal receiving chain receives the signal of the N77 band, in order to avoid signal interference, the first sub-filter 181 is controlled to be adjusted to a filter supporting the N79 band at this time.

In this example, the multiband main filter and the multiband auxiliary filter 18 both adopt the multiband adjustable filter unit 19a described above in this application, and since the details have been described above, the multiband adjustable filter unit 19a is not described any more, and only the details of the structure and operation process of the rf front-end architecture described by way of example will be explained below.

The main low noise amplifier 111 and the sub low noise amplifier 17 in this example refer to amplifiers having a very low noise figure. The wideband low noise amplifier is capable of supporting transmission and amplification of a plurality of frequency band signals under the same communication standard, and the amplifier unit 19b in the foregoing can be adopted; for example, it may support transmission and amplification of N77/N78 and N79 frequency band signals. In the case of amplifying a weak signal, the noise of the amplifier itself may cause serious interference to the signal, and therefore it is desirable to reduce the noise of the amplifier itself to improve the signal-to-noise ratio of the output. Low noise amplifiers are well known to those skilled in the art and can further amplify the received rf signal and output the amplified rf signal.

The main antenna switch selection module 13 includes a main switch circuit, a plurality of main antenna ports, a plurality of peripheral ports, and a plurality of main transceiving ports;

the main switch circuit is used for connecting and gating the main antenna port and the main transceiving port or the peripheral port; the main switch circuit is internally provided with a plurality of switches so as to realize the gating between the main antenna port and the main receiving and transmitting port or between the main antenna port and the peripheral port.

The main receiving and transmitting port is connected with a multi-band main filter 14 of the main signal receiving and transmitting link; in this example, the number of the plurality of main transceiving ports is at least 2, which are respectively called as a first main transceiving port RT11 and a second main transceiving port RT 12; which are respectively used with a first main filter 14a connected to the first main signal transceiving link and a second main signal transceiving link, in particular to the first main signal transceiving link, and a second main filter 14b connected to the second main signal transceiving link, respectively (described in further detail below). Of course, the main transceiving ports are further expanded and added, and there is no limitation that only two main transceiving ports are provided.

The main antenna port is used for connecting a main antenna or an auxiliary antenna switch selection module 16 of an auxiliary radio frequency front end module so as to selectively communicate the main antenna or the auxiliary antenna to two paths of main signal receiving links; in this example, the plurality of main antenna ports are preferably 3 main antenna ports, specifically, the first main antenna port T11, the second main antenna port T12, and the third main antenna port T13 listed in the figure; the 3 main antenna ports are used to connect a main antenna or to a secondary radio frequency front end module (specifically, to a secondary antenna switch selection module 16, and to a secondary antenna through the secondary antenna switch selection module 16), where a first main antenna port T11 is connected to the first main antenna 31, a second main antenna port T12 is connected to the second main antenna 32, and a third main antenna port T13 is connected to one of ports (referred to as a first secondary transceiving port RT21, described later) of the secondary antenna switch selection module 16, where the port can selectively communicate with the first secondary antenna 33 or the second secondary antenna 34 through the secondary antenna switch selection module 16; i.e. to the first secondary antenna 33 or the second secondary antenna 34 through the third primary antenna port T13. The main rf front-end module can not only receive and transmit rf signals through the first main antenna 31 and the second main antenna 32, but also receive and transmit rf signals through the first auxiliary antenna 33 or the second auxiliary antenna 34. In this example, as shown in fig. 6, in this example, the fourth main antenna port T14 and the fifth main antenna port T15 are left for standby, so as to leave for subsequent extension connection of the antenna or connection of the remaining rf front-end modules.

As shown in fig. 11, the peripheral port is configured to be connected to an auxiliary rf front-end module, communicate the main antenna to an auxiliary antenna switch selection module 16 of the auxiliary rf front-end module, and transmit a signal received by the main antenna to two auxiliary signal receiving links. In this example, the number of the peripheral ports may be 1, for example, referred to as a first peripheral port AUX1, and the first peripheral port AUX1 selects to turn on the first main switch or the second main switch through the switch of the main switch circuit. The first peripheral port AUX1 is externally connected to a third secondary antenna port T23 of the secondary radio frequency front end module; in the secondary rf front-end module, the third secondary antenna port T23 and the first secondary signal receiving link or the second secondary signal receiving link may be gated by a secondary switching circuit (described in detail later), so that it may transmit the signal of the first main antenna 31 or the second main antenna 32 to the secondary rf front-end module through the peripheral port for reception. Preferably, the number of peripheral ports can be further increased.

The auxiliary antenna switch selection module 16 includes an auxiliary switch circuit, a plurality of auxiliary receiving ports, a plurality of auxiliary antenna ports, and a plurality of auxiliary transceiving ports; in this example, the secondary antenna ports include 3, referred to as a first secondary antenna port T21, a second secondary antenna port T22, and a third secondary antenna port T23, respectively; wherein the first secondary antenna port T21 is for connecting the first secondary antenna 33; the second secondary antenna port T22 is for connection to the second secondary antenna 34. The third sub antenna port T23 is used to communicate with the first peripheral port AUX1 described above, so that the sub receiving port can communicate with the first sub antenna 33, the second sub antenna 34, or be connected to the first main antenna 31 or the second main antenna 32 through the third sub antenna port T23, respectively.

The secondary switching circuit is used for gating the secondary antenna port and the secondary receiving port or the secondary transceiving port; that is, the secondary antenna port may be gated to the secondary receiving interface, or the secondary antenna port may be gated to the secondary transceiving interface;

the auxiliary receiving port is connected with a multi-band auxiliary filter 18 of the auxiliary signal receiving link and is used for being connected with an auxiliary antenna or a main antenna switch selection module 13 of a main radio frequency front-end module so as to selectively communicate the auxiliary antenna or the main antenna to two paths of auxiliary signal receiving links; in this example, the sub-receiving ports include a first sub-receiving port R21 and a second sub-receiving port R22; the first and second sub-receiving ports R21 and R22 gate the first and second sub-antenna ports T21, T22, or T23 through an internal sub-switch circuit.

The auxiliary receiving and transmitting port is used for being connected to the main radio frequency front end module, communicating the auxiliary antenna to the main antenna switch selection module 13 of the main radio frequency front end module, and connecting the auxiliary antenna to the two main signal receiving links. In this example, the secondary transceiving port is designed to be used for connecting a primary rf front-end module, so that the primary rf front-end module can use the first secondary antenna 33 and the second secondary antenna 34; one auxiliary transceiving port is arranged and is called as a first auxiliary transceiving port RT 21; as a preferable mode, a secondary transceiving port can be added for standby; referred to as a second secondary transceiving port RT 22.

In this example, the modulated rf signal is preferably amplified to a sufficient power by a power amplifier 112, passed through a matching network 113, and transmitted by the antenna. Therefore, a matching network 113 is connected in series between the power amplifier 112 and the rf transceiving switch 12; the matching network 113 is configured to perform impedance matching on the amplified radio frequency signal and output the radio frequency signal to the radio frequency transceiving switch 12. As for the matching network 113, it is known to satisfy a specific matching relationship between the load impedance and the impedance in the source during signal transmission. The output impedance of a device and the impedance of the connected load should satisfy a certain relationship so as not to have obvious influence on the working state of the device after the load is connected. Impedance matching is related to the overall performance of the system, and the matching can be realized to optimize the system performance. The concept of impedance matching has a wide application range, and impedance matching is commonly found between each stage of amplifying circuit, between the amplifying circuit and a load, between a signal and a transmission circuit, and in the design of a microwave circuit and a system, the matching problem has to be considered no matter whether the microwave circuit is active or passive. Those skilled in the art will be able to obtain content regarding the matching network 113 without additional inventive effort. And therefore will not be described again in this example.

The two main signal transceiving links comprise a first main signal transceiving link and a second main signal transceiving link;

the first main signal transceiving link comprises a first radio frequency power amplifier module 11a, a first radio frequency transceiving switch 12a and a first main filter 14 a;

the first radio frequency power amplifier module 11a comprises a first low noise amplifier 111a, a first power amplifier 112a and a first matching network 113 a; a first matching network 113a is connected in series between the first power amplifier 112a and the first rf transceiving switch 12 a; the first low noise amplifier 111a is configured to receive the radio frequency signal transmitted from the first radio frequency transceiving switch 12a, amplify the radio frequency signal, and output the amplified radio frequency signal to the radio frequency transceiving module 2; the first power amplifier 112a is configured to receive a radio frequency signal sent by the radio frequency transceiver module 2, amplify the radio frequency signal, and output the radio frequency signal to the first matching network 113a, where the first matching network 113a is configured to perform impedance matching on the amplified radio frequency signal and output the radio frequency signal to the first radio frequency transceiver switch 12 a;

the first main filter 14a is disposed between the main antenna switch selection module 13 and the first radio frequency transceiver switch 12a, and is configured to filter the radio frequency signal amplified by the first power amplifier 112a and transmit the filtered radio frequency signal to the main antenna switch selection module 13, or filter the radio frequency signal received from the main antenna switch selection module 13 and transmit the filtered radio frequency signal to the first low noise amplifier 111 a;

the second main signal transceiving link comprises a second radio frequency power amplifier module 11b, a second radio frequency transceiving switch 12b and a second main filter 14 b;

the second radio frequency power amplifier module 11b comprises a second low noise amplifier 111b, a second power amplifier 112b and a second matching network 113 b; a second matching network 113b is connected in series between the second power amplifier 112b and the second rf transceiving switch 12 b; the second low noise amplifier 111b is configured to receive the radio frequency signal transmitted from the second radio frequency transceiving switch 12b, amplify the radio frequency signal, and output the amplified radio frequency signal to the radio frequency transceiving module 2; the second power amplifier 112b is configured to receive a radio frequency signal sent by the radio frequency transceiver module 2, amplify the radio frequency signal, and output the radio frequency signal to the second matching network 113b, where the second matching network 113b is configured to perform impedance matching on the amplified radio frequency signal and output the radio frequency signal to the second radio frequency transceiver switch 12 b;

the second main filter 14b is disposed between the main antenna switch selection module 13 and the second radio frequency transceiver switch 12b, and is configured to filter the radio frequency signal amplified by the second power amplifier 112b and transmit the filtered radio frequency signal to the main antenna switch selection module 13, or filter the radio frequency signal received from the main antenna switch selection module 13 and transmit the filtered radio frequency signal to the second low noise amplifier 111 b;

the first low noise amplifier 111a and the second low noise amplifier 111b are multi-band amplifiers. For example, the first power amplifier 112a is a power amplifier supporting N77 frequency band or N79, and the second power amplifier 112b is a power amplifier supporting N79 frequency band or N77; the first low noise amplifier 111a and the first low noise amplifier 111a can both support amplification of radio frequency signals in N77 and N79 frequency bands;

the first and second

main filters

14a, 14b are band pass filters supporting the N77 and N79 frequency bands.

The main radio frequency front end module is provided with a first receiving port RX1, a second receiving port RX2, a first transmitting port TX1 and a second transmitting port TX2 which are used for being connected to the radio frequency transceiving module 2;

the first receiving port RX1 is disposed at the output end of the first low noise amplifier 111 a; the second receiving port RX2 is disposed at the output end of the second low noise amplifier 111 b; the first transmitting port TX1 is arranged at the input end of the first power amplifier 112 a; the second transmitting port TX2 is provided at the input of the second power amplifier 112 b.

Specifically, as shown in fig. 10-11, the two secondary signal receiving links include a first secondary signal receiving link and a second secondary signal receiving link;

the first secondary signal receiving chain comprises a fourth low noise amplifier 171 and a first secondary filter 181;

the first sub-filter 181 is configured to filter the radio frequency signal received by the sub-antenna switch selection module 16 and transmit the filtered radio frequency signal to the fourth low noise amplifier 171; the fourth low noise amplifier 171 is configured to receive the radio frequency signal transmitted from the first sub-filter 181, amplify the radio frequency signal, and output the amplified radio frequency signal to the radio frequency transceiver module 2;

the second secondary signal receive chain includes a fourth low noise amplifier 172 and a second secondary filter 182;

the second sub-filter 182 is configured to filter the radio frequency signal received by the sub-antenna switch selection module 16 and transmit the filtered radio frequency signal to the fourth low noise amplifier 172; the fourth low noise amplifier 172 is configured to receive the radio frequency signal transmitted from the second sub-filter 182, amplify the radio frequency signal, and output the amplified radio frequency signal to the radio frequency transceiver module 2.

In this example, the first sub-filter 181 and the second sub-filter 182 are also band-pass filters supporting N77 and N79 frequency bands; the fourth low noise amplifier 171 and the fourth low noise amplifier 172 may each support amplification of radio frequency signals in N77 and N79 frequency bands.

Preferably, as shown in fig. 10 to 11, the secondary rf front-end module further includes a port selection module 15; the port selection module 15 comprises a built-in selection switch, a third receiving port RX3 and a fourth receiving port RX 4;

the built-in selection switch is used for selectively switching on a third receiving port RX3, a fourth receiving port RX4 and the first secondary signal receiving link and the second secondary signal receiving link;

the third receiving port RX3 and the fourth receiving port RX4 are used for connecting to the radio frequency transceiver module 2.

As shown in fig. 10 to 11, in this example, the first main antenna 31 is connected to the first main antenna port T11 through a first external duplexer 311; the second main antenna 32 is connected to the second main antenna port T12 through a second external duplexer 321;

the first secondary antenna 33 is connected to the first secondary antenna port T21 through a third external duplexer 331, and the second secondary antenna 34 is connected to the second secondary antenna port T22 through a fourth external duplexer 341;

the third main antenna port T13 of the main antenna switch selection module 13 is connected to one of the secondary transceiving ports (the first secondary transceiving port RT21) on the secondary antenna switch selection module 16; one of the peripheral ports (first peripheral port AUX1) of the main antenna switch selection module 13 is connected to the third sub antenna port T23 of the sub antenna switch selection module 16.

In this example, the first external duplexer 311, the second external duplexer 321, the third external duplexer 331, and the fourth external duplexer 341 are well known, and may be formed by two sets of band-stop filters, for example, N77 band or N79 band. The function is to isolate the transmitting and receiving signals, filter the interference and ensure the normal operation of both receiving and transmitting. Preventing transmission of the local transmit signal to the receiver.

In this example, the first main antenna 31, the second main antenna 32, the first sub-antenna 33, and the second sub-antenna 34 are SRS (Sounding Reference Signal) antennas. By adopting the SRS antenna, the radio frequency signal can be sent in turn, and the SRS sending in turn refers to which physical antenna the communication terminal 1000 sends SRS information. The terminal transmits SRS information is one of the ways for the base station to probe the terminal position and channel quality. The more the number of antennas capable of participating in transmitting the reference signal is, the more accurate the channel estimation is, and the higher the rate can be obtained; if the antenna is only used for transmitting, other antenna information is lost, the antenna is not fully utilized, and the highest rate is difficult to obtain. The radio frequency front end module architecture in this example can complete the signal transmission and reception of various frequency bands on 4 antennas.

For example, in this example, the first power amplifier 112a in the first main signal transceiver circuit in the main rf front-end module realizes transmission of the rf signal in the N77 frequency band, and the second power amplifier 112b in the second main signal transceiver circuit realizes transmission of the rf signal in the N79 frequency band. The radio frequency signal of the N77 frequency band may pass through the first matching network 113a, the first radio frequency transceiving switch 12a, and the first main filter 14a in the first main signal transceiving circuit, and then pass through the main antenna switch selection module 13 to select the first main antenna 31, the second main antenna 32, the first auxiliary antenna 33, and the second auxiliary antenna 34 for transmission. Similarly, the radio frequency signal in the N79 frequency band may pass through the second matching network 113b, the second radio frequency transceiver switch 12b, and the second main filter 14b in the second main signal transceiver circuit, and then pass through the main antenna switch selection module 13 to select the first main antenna 31, the second main antenna 32, the first auxiliary antenna 33, and the second auxiliary antenna 34 for transmission in turn.

When receiving radio frequency signals, after receiving the radio frequency signals through the first main antenna 31, the second main antenna 32, the first sub-antenna 33, and the second sub-antenna 34, the radio frequency signals may be received through various links, and finally received into the radio frequency transceiver module 2 through the first receiving port RX1, the second receiving port RX2, the third receiving port RX3, and the fourth receiving port RX 4.

Hereinafter, the operation state of the present application will be specifically explained with reference to the above drawings. And the receiving or sending of each radio frequency signal is realized by gating each signal link in the main radio frequency front-end module and the auxiliary radio frequency front-end module.

The receive path of the rf signal is described as follows:

a first receiving path: the radio frequency signal is received from the first main antenna 31, enters from the first main antenna port T11, is gated by the main switch circuit at the first main transceiving port RT11, is filtered by the first main filter 14a, is transmitted to the first low noise amplifier 111a by the first radio frequency transceiving switch 12a, is amplified, and is output from the first receiving port RX1 to the radio frequency receiving module.

A second receiving path: the radio frequency signal is received from the first main antenna 31, enters from the first main antenna port T11, passes through the main switch circuit to gate the second main transceiving port RT12, is filtered by the second main filter 14b, passes through the second radio frequency transceiving switch 12b, is transmitted to the second low noise amplifier 111b, is amplified, and is output from the second receiving port RX2 to the radio frequency receiving module.

Third and fourth receiving paths: the rf signal is received from the first main antenna 31, enters from the first main antenna port T11, and is gated by the main switch circuit to the first peripheral port AUX1, and is then gated by the sub switch circuit to the first sub receiving port R21 from the third sub antenna port T23, and is then filtered by the first sub filter 181, amplified by the fourth low noise amplifier 171, and output from the third receiving port RX3 or the fourth receiving port RX4 to the rf receiving module.

Fifth and sixth receiving paths: a radio frequency signal is received from the first main antenna 31, enters from the first main antenna port T11, and is gated by the main switch circuit to the first peripheral port AUX1, and is then gated by the sub switch circuit to the second sub receiving port R22 from the third sub antenna port T23, and is then filtered by the second sub filter 182, amplified by the fourth low noise amplifier 172, and output from the third receiving port RX3 or the fourth receiving port RX4 to the radio frequency receiving module.

A seventh reception path: the radio frequency signal is received from the second main antenna 32, enters from the second main antenna port T12, passes through the main switch circuit to gate the first main transceiving port RT11, is filtered by the first main filter 14a, passes through the first radio frequency transceiving switch 12a, is transmitted to the first low noise amplifier 111a, is amplified, and is output from the first receiving port RX1 to the radio frequency receiving module.

Eighth receiving path: the radio frequency signal is received from the second main antenna 32, enters from the second main antenna port T12, is gated by the main switch circuit at the second main transceiving port RT12, is filtered by the second main filter 14b, is transmitted to the second low noise amplifier 111b by the second radio frequency transceiving switch 12b, is amplified, and is output from the second receiving port RX2 to the radio frequency receiving module.

Ninth and tenth receiving paths: the rf signal is received from the second main antenna 32, enters from the second main antenna port T12, and is gated by the main switch circuit to the first peripheral port AUX1, and is then gated by the sub switch circuit to the first sub receiving port R21 from the third sub antenna port T23, and is then filtered by the first sub filter 181, amplified by the fourth low noise amplifier 171, and output from the third receiving port RX3 or the fourth receiving port RX4 to the rf receiving module.

Eleventh and twelfth receiving paths: the rf signal is received from the second main antenna 32, enters from the second main antenna port T12, and is gated by the main switch circuit to the first peripheral port AUX1, and is then gated by the sub switch circuit to the second sub receiving port R22 from the third sub antenna port T23, and is then filtered by the second sub filter 182, amplified by the fourth low noise amplifier 172, and then output from the third receiving port RX3 or the fourth receiving port RX4 to the rf receiving module.

Thirteenth, fourteenth reception path: a radio frequency signal is received from the first sub antenna 33, enters from the first sub antenna port T21, passes through the sub switching circuit to gate the first sub receiving port R21, is filtered by the first sub filter 181, is amplified by the fourth low noise amplifier 171, and is output to the radio frequency receiving module from the third receiving port RX3 or the fourth receiving port RX 4.

Fifteenth and sixteenth receiving paths: a radio frequency signal is received from the first sub-antenna 33, enters from the first sub-antenna port T21, is gated at the second sub-reception port R22 by the sub-switching circuit, is filtered by the second sub-filter 182, is amplified by the fourth low noise amplifier 172, and is output to the radio frequency reception module from the third reception port RX3 or the fourth reception port RX 4.

Seventeenth and eighteenth receiving paths: a radio frequency signal is received from the second sub-antenna 34, enters from the second sub-antenna port T22, is gated by the sub-switching circuit at the first sub-reception port R21, is filtered by the first sub-filter 181, is amplified by the fourth low noise amplifier 171, and is output to the radio frequency reception module from the third reception port RX3 or the fourth reception port RX 4.

Nineteenth and twentieth receiving paths: a radio frequency signal is received from the second sub-antenna 34, enters from the second sub-antenna port T22, is gated at the second sub-reception port R22 by the sub-switching circuit, is filtered by the second sub-filter 182, is amplified by the fourth low noise amplifier 172, and is output to the radio frequency reception module from the third reception port RX3 or the fourth reception port RX 4.

Twenty-first receive path: the radio frequency signal is received from the first auxiliary antenna 33, enters from the first auxiliary antenna port T21, passes through the auxiliary switch circuit to gate the first auxiliary transceiving port RT21, enters from the third main antenna port T13 into the main radio frequency front end module, passes through the main switch circuit to gate the first main transceiving port RT11, is filtered by the first main filter 14a, passes through the first radio frequency transceiving switch 12a, is transmitted to the first low noise amplifier 111a, is amplified, and is output from the first receiving port RX1 to the radio frequency receiving module.

Twenty-second receive path: the radio frequency signal is received from the first auxiliary antenna 33, enters from the first auxiliary antenna port T21, passes through the auxiliary switch circuit to gate the first auxiliary transceiving port RT21, enters from the third main antenna port T13 into the main radio frequency front end module, passes through the main switch circuit to gate the second main transceiving port RT12, is filtered by the second main filter 14b, passes through the second radio frequency transceiving switch 12b, is transmitted to the second low noise amplifier 111b, is amplified, and is output from the second receiving port RX2 to the radio frequency receiving module.

Twenty-third receive path: the rf signal is received from the second secondary antenna 34, enters from the second secondary antenna port T22, passes through the secondary switch circuit to gate the first secondary transceiving port RT21, enters from the third primary antenna port T13 into the primary rf front-end module, passes through the primary switch circuit to gate the first primary transceiving port RT11, is filtered by the first primary filter 14a, passes through the first rf transceiving switch 12a, is transmitted to the first low noise amplifier 111a, is amplified, and is output from the first receiving port RX1 to the rf receiving module.

Twenty-fourth receive path: the rf signal is received from the second secondary antenna 34, enters from the second secondary antenna port T22, passes through the secondary switch circuit to gate the first secondary transceiving port RT21, enters from the third primary antenna port T13 into the primary rf front-end module, passes through the primary switch circuit to gate the second primary transceiving port RT12, is filtered by the second primary filter 14b, passes through the second rf transceiving switch 12b, is transmitted to the second low noise amplifier 111b, is amplified by the second rf transceiving switch 12b, and is output from the second receiving port RX2 to the rf receiving module.

The above-mentioned receiving path shows that 4 antennas thereof can be used as receiving antennas of radio frequency signals, and it can realize that multiple paths receive radio frequency signals through the selection of the main radio frequency switch selection module, the sub radio frequency switch selection module and the radio frequency transceiving switch, and finally select one of the first receiving port RX1, the second receiving port RX2, the third receiving port RX3 and the fourth receiving port RX4 to receive the radio frequency signals into the radio frequency transceiving module 2.

The transmission path of the radio frequency signal is described as follows:

first transmission path: the radio frequency signal of N77 frequency band sent by the radio frequency transceiving module 2 enters the main radio frequency front end module through the first radio frequency sending port, is amplified by the first power amplifier 112a, is subjected to impedance matching by the first matching network 113a, enters the first main filter 14a through the first radio frequency transceiving switch 12a for filtering, passes through the main antenna switch to gate the first main antenna port T11, and is sent from the first main antenna 31.

A second transmission path: the radio frequency signal of N77 frequency band sent by the radio frequency transceiving module 2 enters the main radio frequency front end module through the first radio frequency sending port, is amplified by the first power amplifier 112a, is subjected to impedance matching by the first matching network 113a, enters the first main filter 14a through the first radio frequency transceiving switch 12a for filtering, passes through the main antenna switch to gate the second main antenna port T12, and is transmitted from the second main antenna 32.

Third transmission path: the radio frequency signal of N77 frequency band sent by the radio frequency transceiving module 2 enters the main radio frequency front end module through the first radio frequency sending port, is amplified by the first power amplifier 112a, is subjected to impedance matching by the first matching network 113a, enters the first main filter 14a through the first radio frequency transceiving switch 12a for filtering, passes through the main antenna switch to gate the third main antenna port T13, enters the auxiliary radio frequency front end module from the first auxiliary transceiving port RT21, passes through the auxiliary switching circuit to gate the first auxiliary antenna port T21, and sends the radio frequency signal from the first auxiliary antenna 33.

Fourth transmission path: the radio frequency signal of N77 frequency band sent by the radio frequency transceiving module 2 enters the main radio frequency front end module through the first radio frequency sending port, is amplified by the first power amplifier 112a, is subjected to impedance matching by the first matching network 113a, enters the first main filter 14a through the first radio frequency transceiving switch 12a for filtering, passes through the main antenna switch to gate the third main antenna port T13, enters the auxiliary radio frequency front end module from the first auxiliary transceiving port RT21, passes through the auxiliary switching circuit to gate the second auxiliary antenna port T22, and sends the radio frequency signal from the second auxiliary antenna 34.

The 4 transmission paths can realize the alternate transmission of the radio frequency signals in the N77 frequency band.

Fifth transmission path: the radio frequency signal of N79 frequency band sent by the radio frequency transceiving module 2 enters the main radio frequency front end module through the second radio frequency sending port, is amplified by the second power amplifier 112b, is subjected to impedance matching by the second matching network 113b, enters the second main filter 14b through the second radio frequency transceiving switch 12b for filtering, passes through the main antenna switch to gate the first main antenna port T11, and is sent from the first main antenna 31.

Sixth transmission path: the radio frequency signal of N79 frequency band sent by the radio frequency transceiving module 2 enters the main radio frequency front end module through the second radio frequency sending port, is amplified by the second power amplifier 112b, is subjected to impedance matching by the second matching network 113b, enters the second main filter 14b through the second radio frequency transceiving switch 12b for filtering, passes through the main antenna switch to gate the second main antenna port T12, and transmits the radio frequency signal from the second main antenna 32.

A seventh transmission path: the radio frequency signal of N79 frequency band sent by the radio frequency transceiving module 2 enters the main radio frequency front end module through the second radio frequency sending port, is amplified by the second power amplifier 112b, is subjected to impedance matching by the second matching network 113b, enters the second main filter 14b through the second radio frequency transceiving switch 12b for filtering, passes through the main antenna switch to gate the third main antenna port T13, enters the auxiliary radio frequency front end module from the first auxiliary transceiving port RT21, passes through the auxiliary switching circuit to gate the first auxiliary antenna port T21, and sends the radio frequency signal from the first auxiliary antenna 33.

Eighth transmission path: the radio frequency signal of N79 frequency band sent by the radio frequency transceiving module 2 enters the main radio frequency front end module through the second radio frequency sending port, is amplified by the second power amplifier 112b, is impedance matched by the second matching network 113b, enters the second main filter 14b through the second radio frequency transceiving switch 12b for filtering, passes through the main antenna switch to gate the third main antenna port T13, enters the auxiliary radio frequency front end module from the first auxiliary transceiving port RT21, passes through the auxiliary switching circuit to gate the second auxiliary antenna port T22, and sends the radio frequency signal from the second auxiliary antenna 34.

The 4 transmission paths can realize the alternate transmission of the radio frequency signals in the N79 frequency band.

In summary, the above transmission path indicates that all 4 antennas can be used as transmission antennas for rf signals, and the rf signals are transmitted into the main rf front-end module through the first transmission port TX1 or the second transmission port TX2, and are finally transmitted from the 4 antennas after being processed by amplification, impedance matching, filtering, and the like.

In the communication terminal provided in the embodiment of the present invention, the amplifier unit 19b and the multi-band adjustable filter unit 19a are disposed in two or more wideband rf processing links 19 in the rf front-end architecture of the antenna module, so that, for example, in 5G applications, the communication terminal can work in different working modes, can support signal transmission in multiple different modes, and can further simplify the structure of the rf front-end architecture, simplify the structure thereof, reduce the complexity of the design, and reduce the area of the rf front-end architecture.

In addition, it sets the filter in the wideband rf processing link 19 as the multiband adjustable filtering unit 19a, so that it supports multiple frequency bands in the same wideband rf processing link 19, and each frequency band can be selected, because of its range of frequency bands, it reduces the number of wideband rf processing links 19 or reduces the number of rf front-end modules. And since the frequency band can be selected, the bandwidth can be adjusted according to the signal transmission condition of other transmitting or receiving broadband radio frequency processing link 19. For example, the transmission or reception of signals in close frequency bands in other wideband rf processing links 19 is avoided, and the bandwidths supported by the multiband adjustable filter unit 19a are adjusted to effectively reduce the interference between wideband rf processing links 19.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. A radio frequency front end architecture is characterized in that more than two broadband radio frequency processing links are arranged on the radio frequency front end architecture;

2. The RF front-end architecture of claim 1, wherein two wideband RF processing links are provided on the RF front-end architecture; the first broadband radio frequency processing link comprises a first amplifier unit and a first multiband adjustable filtering unit, and the second broadband radio frequency processing link comprises a second amplifier unit and a second multiband adjustable filtering unit;

3. The RF front-end architecture of claim 1, wherein the RF front-end architecture comprises more than one RF front-end module;

more than two broadband radio frequency processing links are arranged in the radio frequency front-end module.

4. The RF front-end architecture of claim 3, wherein the RF front-end module includes a switch selection module; more than two broadband radio frequency processing links are connected to the switch selection module;

and the switch selection module is used for selectively switching on the antenna link module outside the radio frequency front-end module.

5. The radio frequency front end architecture of claim 1, wherein the multiband adjustable filtering unit comprises a multiband band-pass filter, a first switch, a first frequency adjustment module, a second switch, and a second frequency adjustment module;

the first frequency adjusting module is connected to the multi-band-pass filter through the first switch so as to enable the multi-band adjustable filtering unit to support filtering of a first frequency band by gating the first switch;

the second frequency adjusting module is connected to the multi-band-pass filter through the second switch so as to enable the multi-band adjustable filtering unit to support filtering of the second frequency band by gating the second switch.

6. The RF front-end architecture of claim 5, wherein the RF front-end architecture comprises a link frequency detection module and a frequency selection control module; the link frequency detection module is used for detecting radio frequency signals in each broadband radio frequency processing link; the frequency selection control module is used for controlling the on-off of a first switch and a second switch in a multi-band adjustable filtering unit in each broadband radio frequency processing link.

7. The radio frequency front end architecture of claim 1, wherein the first frequency bin is N77, the second frequency bin is N79; alternatively, the first frequency segment is N78 and the second frequency segment is N79.

8. The RF front-end architecture of claim 4, comprising a first RF front-end module and a second RF front-end module; the first radio frequency front end module is a main radio frequency front end module, and the second radio frequency front end module is an auxiliary radio frequency front end module;

the main radio frequency front end module comprises two main signal transceiving links and a main antenna switch selection module; the two main signal transceiving links are connected with the main antenna switch selection module;

each main signal transceiving link comprises a radio frequency power amplifier module, a radio frequency transceiving switch and a multi-band main filter which are arranged in sequence;

the radio frequency power amplifier module comprises a main low noise amplifier and a power amplifier; the power amplifier and the main low noise amplifier are connected with the radio frequency transceiving switch; the main low noise amplifier is used for receiving the radio frequency signal transmitted from the radio frequency transceiving switch, amplifying the radio frequency signal and outputting the amplified radio frequency signal to the radio frequency transceiving module; the power amplifier is used for receiving the radio frequency signal sent by the radio frequency transceiving module, amplifying the radio frequency signal and outputting the amplified radio frequency signal to the radio frequency transceiving switch;

the radio frequency transceiving switch is arranged between the radio frequency power amplifier module and the multi-band main filter and used for switching the connection between the multi-band main filter and the main low noise amplifier or the power amplifier so as to selectively connect the multi-band main filter with the main low noise amplifier or the power amplifier;

the multi-band main filter is arranged between the antenna switch selection module and the radio frequency transceiving switch and is used for filtering the radio frequency signal amplified by the power amplifier and then transmitting the radio frequency signal to the main antenna switch selection module or filtering the radio frequency signal received from the main antenna switch selection module and then transmitting the radio frequency signal to the main low noise amplifier; the multi-band main filter is the multi-band adjustable filtering unit;

the main antenna switch selection module is used for connecting and gating two main signal transceiving links and a main antenna or connecting an auxiliary radio frequency front end module;

the auxiliary radio frequency front end module comprises a port selection module, an auxiliary antenna switch selection module and two auxiliary signal receiving links, wherein the two auxiliary signal receiving links are arranged between the port selection module and the auxiliary antenna switch selection module;

the two secondary signal receiving links comprise secondary low noise amplifiers and multi-band secondary filters;

the auxiliary antenna switch selection module is used for connecting a gating auxiliary antenna or a main radio frequency front-end module and is used for receiving radio frequency signals of the main antenna or the auxiliary antenna or transmitting the radio frequency signals received by the auxiliary antenna to the main radio frequency front-end module; the multi-band secondary filter is used for filtering the radio frequency signal received by the secondary antenna switch selection module and then transmitting the radio frequency signal to the secondary low noise amplifier; the auxiliary low noise amplifier is used for receiving the radio frequency signals transmitted from the multi-band auxiliary filter, amplifying the radio frequency signals and outputting the amplified radio frequency signals to the radio frequency transceiver module;

the multi-band secondary filter is the multi-band adjustable filtering unit.

9. An antenna device comprises a baseband module, a radio frequency transceiver module, a radio frequency front end framework and an antenna link module; wherein the RF front-end architecture is the RF front-end architecture of any one of claims 1-8.

10. A communication terminal, characterized in that it comprises an antenna arrangement according to claim 9.