CN115118297A - Radio frequency front end module, radio frequency transceiving system and communication equipment - Google Patents
Radio frequency front end module, radio frequency transceiving system and communication equipment Download PDFInfo
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- CN115118297A CN115118297A CN202110292724.8A CN202110292724A CN115118297A CN 115118297 A CN115118297 A CN 115118297A CN 202110292724 A CN202110292724 A CN 202110292724A CN 115118297 A CN115118297 A CN 115118297A
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Abstract
The embodiment of the application relates to a radio frequency front end module, radio frequency receiving and dispatching system and communications facilities, and radio frequency front end module, radio frequency front end module includes: the receiving and sending circuit is respectively connected with the input port and a receiving port and is used for selectively supporting the receiving processing of the first radio-frequency signal received by the antenna port and selectively supporting the transmission of the first radio-frequency signal received by the input port to the antenna port for emission; the receiving circuit is connected with the other receiving port and is used for supporting receiving processing of a second radio frequency signal, and the frequency band of the second radio frequency signal is different from that of the first radio frequency signal; the antenna port is connected with the receiving circuit, the receiving circuit is connected with the antenna port, and the first switch component is used for selectively conducting a path between the antenna port and at least one of the receiving circuit and the receiving circuit.
Description
Technical Field
The embodiment of the application relates to the technical field of antenna radio frequency, in particular to a radio frequency front-end module, a radio frequency transceiving system and communication equipment.
Background
With the continuous development of communication technologies, communication devices need to implement a function of transceiving signals of multiple different standards or different frequency bands, so as to support the function of transceiving signals under multiple different conditions, and improve the communication capability of the communication devices. However, the transceiving function of signals of different systems or different frequency bands can be realized only by a plurality of radio frequency transceiving devices, which results in a larger volume of communication radio frequency and insufficient integration level.
Disclosure of Invention
The embodiment of the application provides a radio frequency front end module, a radio frequency transceiving system and a communication device, which can be compatible with a transmitting function of a radio frequency signal in one frequency band and a receiving function of a radio frequency signal in another frequency band simultaneously, thereby improving the integration level of the radio frequency front end module and further reducing the volumes of the radio frequency transceiving system and the communication device.
A radio frequency front end module configured with an antenna port for connecting to an antenna, two receive ports for connecting to a radio frequency transceiver, and an input port for receiving a first radio frequency signal, the radio frequency front end module comprising:
the receiving and transmitting circuit is respectively connected with the input port and the receiving port and is used for selectively supporting the receiving processing of the first radio-frequency signal received by the antenna port and selectively supporting the transmission of the first radio-frequency signal received by the input port to the antenna port for transmission;
the receiving circuit is connected with the other receiving port and is used for supporting receiving processing of a second radio frequency signal, and the frequency band of the second radio frequency signal is different from that of the first radio frequency signal;
the antenna port is connected with the receiving circuit, the receiving circuit is connected with the antenna port, and the first switch component is used for selectively conducting a path between the antenna port and at least one of the receiving circuit and the receiving circuit.
A radio frequency transceiving system comprising:
a radio frequency transceiver;
an antenna group comprising a first antenna, a second antenna, a third antenna and a fourth antenna;
as mentioned above, the two receiving ports of the rf front-end module are respectively connected to the rf transceiver, and the antenna port of the first rf device is connected to the first antenna;
a first radio frequency device to support transmission of the first radio frequency signal;
the first end of the third switch assembly is connected with the first radio frequency device, one second end of the third switch assembly is connected with the input port of the radio frequency front end module, the other three second ends of the third switch assembly respectively correspond to the second antenna, the third antenna and the fourth antenna one to one, and the third switch assembly is used for selectively outputting the first radio frequency signal to any antenna.
A communication device comprises the radio frequency transceiving system.
The above-mentioned radio frequency front end module, radio frequency transceiving system and communications facilities, the radio frequency front end module is configured with the antenna port that is used for connecting the antenna, is used for connecting two receiving ports of radio frequency transceiver, and is used for receiving the input port of first radio frequency signal, the radio frequency front end module includes: the receiving and transmitting circuit is respectively connected with the input port and the receiving port and is used for selectively supporting the receiving processing of the first radio-frequency signal received by the antenna port and selectively supporting the transmission of the first radio-frequency signal received by the input port to the antenna port for transmission; the receiving circuit is connected with the other receiving port and is used for supporting receiving processing of a second radio frequency signal, and the frequency band of the second radio frequency signal is different from that of the first radio frequency signal; the antenna port is connected with the receiving circuit, the receiving circuit is connected with the antenna port, and the first switch component is used for selectively conducting a path between the antenna port and at least one of the receiving circuit and the receiving circuit. In the embodiment of the application, based on the first switch component capable of selectively conducting at least one path, the radio frequency front end module can not only selectively receive or transmit a single-frequency-band radio frequency signal, but also can simultaneously receive and transmit a dual-frequency-band signal through one antenna port on the premise of not interrupting the radio frequency signal path of any frequency band, so that the radio frequency front end module with high integration level and the function of simultaneously receiving and transmitting the dual-frequency-band signal is provided.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions 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 embodiment of a rf front-end module;
FIG. 2 is a second block diagram of an RF front-end module according to an embodiment;
FIG. 3 is a block diagram of a first switch assembly according to one embodiment;
FIG. 4 is a third block diagram illustrating a structure of an RF front-end module according to an embodiment;
FIG. 5 is a block diagram of an embodiment of an RF transceiver system;
fig. 6 is a second block diagram of an rf transceiver system according to an embodiment;
fig. 7 is a third block diagram of an exemplary rf transceiving system.
Element number description:
radio frequency front end module: 10; a transceiver circuit: 100, respectively; a first receiving unit: 110; a first radio frequency switch: 120 of a solvent; a receiving circuit: 200 of a carrier; a first switch assembly: 300, respectively; a signal frequency dividing unit: 310; a first impedance adjuster: 311; a second impedance adjuster: 312; a second radio frequency switch: 320, a first step of mixing; a first filter: 410; a second filter: 420; a multi-channel selection switch: 500, a step of; a radio frequency transceiver: 20; a first radio frequency device: 30, of a nitrogen-containing gas; a third switch assembly: 40; a fourth radio frequency switch: 41; a fifth radio frequency switch: 42; a sixth radio frequency switch: 43; the second radio frequency device: 50; the third radio frequency switch: 60; the third radio frequency device: 70.
Detailed Description
To facilitate an understanding of the embodiments of the present application, the embodiments of the present application will be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the present application are shown in the drawings. The embodiments of the present 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.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the embodiments of this application belong. The terminology used herein in the description of the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the embodiments of the present application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
It will be understood that, as used herein, the terms "first," "second," and the like may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, a first radio frequency signal may be referred to as a second radio frequency signal, and similarly, a second radio frequency signal may be referred to as a first radio frequency signal, without departing from the scope of the present application. The first and second radio frequency signals are both radio frequency signals, but they are not the same radio frequency signal.
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 such 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 front end module 10 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.
In this embodiment, the rf front-end module 10 may support receiving and transmitting signals in one frequency band and receiving signals in another frequency band, so as to implement receiving switching control, transmitting switching control, and switching control between transmitting and receiving of signals. Further, the rf front-end module 10 may be understood as a package structure, fig. 1 is a block diagram of the rf front-end module 10 according to an embodiment, and referring to fig. 1, in the embodiment, the rf front-end module 10 is configured with an antenna port for connecting an antenna, two receiving ports for connecting an rf transceiver, and an input port for receiving a first rf signal, and the rf front-end module 10 includes a transceiver circuit 100, a receiving circuit 200, and a first switch assembly 300.
The transceiver circuit 100 is respectively connected to the input port and the receiving port, and is configured to selectively support receiving processing of the first radio frequency signal received by the antenna port, and selectively support transmitting the first radio frequency signal received by the input port to the antenna port for transmission. Specifically, the transceiver circuit 100 may select to transmit the first radio frequency signal from the antenna port to the receiving port or select to transmit the first radio frequency signal from the input port to the antenna port based on the internal control structure according to the transceiving requirements of the device, and when the transceiver circuit 100 transmits the first radio frequency signal, the transceiver circuit may also amplify, filter, and the like the first radio frequency signal, so as to improve the transceiving quality of the first radio frequency signal.
The receiving circuit 200 is connected to another receiving port, and is configured to support receiving processing of a second radio frequency signal, where a frequency band of the second radio frequency signal is different from a frequency band of the first radio frequency signal. The receiving circuit 200 may include a low noise amplifier. It should be noted that the first radio frequency signal refers to a radio frequency signal in a first frequency band, the second radio frequency signal refers to a radio frequency signal in a second frequency band, and the first radio frequency signal and the second radio frequency signal are not specifically referred to as a received radio frequency signal or a transmitted radio frequency signal, but are only used for distinguishing signals in different frequency bands. Further, the first rf signal may be a 5G standard rf signal, such as an N41 band rf signal. The second rf signal may be a 4G standard rf signal, such as a B3 band rf signal. In other embodiments of the present application, the first rf signal is a signal in the N41 band, and the second rf signal is a signal in the B3 band.
Two first ends of the first switch component 300 are respectively connected with the transceiver circuit 100 and the receiver circuit 200 in a one-to-one correspondence manner, a second end of the first switch component 300 is connected with the antenna port, and the first switch component 300 is configured to selectively conduct a path between the antenna port and at least one of the transceiver circuit 100 and the receiver circuit 200. The first switch component 300 may select to only conduct a path between the antenna port and the transceiver circuit 100, so as to implement receiving or transmitting of the first frequency band signal; the first switch component 300 may also selectively only conduct a path between the antenna port and the receiving circuit 200, so as to implement receiving of the second frequency band signal; the first switch component 300 may further select to simultaneously conduct a path between the antenna port and the transceiver circuit 100 and a path between the antenna port and the receiving circuit 200, so as to simultaneously implement transceiving of the first frequency band signal and receiving of the second frequency band signal. Based on the structure, the receiving and sending functions of signals in different frequency bands can be integrated in the same radio frequency device, so that the integration level of the radio frequency front-end module 10 is improved. Further, the first switch module 300 is configured with an isolation structure for signals in different frequency bands, so as to prevent interference between signals in different frequency bands when two paths are conducted simultaneously, thereby improving the quality of signal transceiving of the rf front-end module 10.
In this embodiment, the rf front-end module 10 is configured with an antenna port for connecting an antenna, two receiving ports for connecting the rf transceiver 20, and an input port for receiving a first rf signal, and the rf front-end module 10 includes: a transceiver circuit 100, connected to the input port and the receiving port respectively, for selectively supporting receiving processing of the first radio frequency signal and transmission of the first radio frequency signal received by the input port; a receiving circuit 200, connected to another receiving port, for supporting a receiving process of a second radio frequency signal, where a frequency band of the second radio frequency signal is different from a frequency band of the first radio frequency signal; two first ends of the first switch component 300 are respectively connected with the transceiver circuit 100 and the receiver circuit 200 in a one-to-one correspondence manner, a second end of the first switch component 300 is connected with the antenna port, and the first switch component 300 is configured to selectively turn on a path between the antenna port and at least one of the transceiver circuit 100 and the receiver circuit 200. In the embodiment of the present application, based on the first switch component 300 capable of selectively turning on at least one path, the radio frequency front end module 10 may not only select to receive or transmit a single-band radio frequency signal, but also realize simultaneous receiving and transmitting of a dual-band signal through one antenna port on the premise of not interrupting a radio frequency signal path of any frequency band, thereby providing the radio frequency front end module 10 with a high integration level and a dual-band simultaneous receiving and transmitting function.
Fig. 2 is a second block diagram of the rf front-end module 10 according to an embodiment, and referring to fig. 2, in the embodiment, the transceiver circuit 100 includes a first receiving unit 110 and a first rf switch 120.
The first receiving unit 110 is connected to one of the receiving ports, and is configured to receive and amplify the first radio frequency signal. Specifically, the first receiving unit 110 may include a Low Noise Amplifier (LNA), and the LNA may amplify an effective signal without increasing Noise, so as to improve a signal-to-Noise ratio of the received radio frequency signal, and further improve the signal processing quality of the radio frequency front end module 10. It is understood that in other embodiments, the first receiving unit 110 may further include a filter, a radio frequency switch, a power divider, and the like, so as to implement a richer signal receiving function. In the embodiments of the present application, the first receiving unit 110 includes a low noise amplifier as an example.
Two first ends of the first rf switch 120 are respectively connected to the input port and the first receiving unit 110 in a one-to-one correspondence manner, a second end of the first rf switch 120 is connected to a first end of the first switch component 300, and the first rf switch 120 is configured to select to transmit the first rf signal from the first switch component 300 to the first receiving unit 110 or to transmit the first rf signal from the input port to the first switch component 300. In the embodiment shown in fig. 2, the first rf switch 120 is a single-pole double-throw switch, and it is understood that in other embodiments, the first rf switch 120 may be configured with other numbers of first terminals and second terminals to achieve other path switching functions.
In this embodiment, based on the integration of the first rf switch 120 in the rf front-end module 10, the switching of the transceiving function of the first rf signal can be achieved without the need of supporting other external path switching devices, so as to effectively reduce the number of devices in the rf transceiving system, thereby improving the overall integration of the rf transceiving system and reducing the volume of the communication device.
Fig. 3 is a block diagram illustrating a first switch assembly 300 according to an embodiment, and referring to fig. 3, in this embodiment, the first switch assembly 300 includes a signal dividing unit 310 and a second rf switch 320.
Two first ends of the second rf switch 320 are respectively connected to the signal frequency dividing unit 310, a second end of the second rf switch 320 is connected to the antenna port, and the second rf switch 320 is configured to select to turn on a signal transmission path corresponding to a frequency band of a transmitted rf signal when one of the first rf signal and the second rf signal is transmitted; and when the first radio frequency signal and the second radio frequency signal are transmitted simultaneously, the first signal transmission channel and the second signal transmission channel are selected to be conducted simultaneously. The signal frequency dividing unit 310 is respectively connected to the second end of the first rf switch 120, the receiving circuit 200, and the second rf switch 320, and is configured to control the first rf signal to be transmitted to the first signal transmission path and control the second rf signal to be transmitted to the second signal transmission path when the first rf signal and the second rf signal are transmitted simultaneously.
Wherein the signal frequency dividing unit 310 may implement frequency division by means of impedance adjustment, and with continued reference to fig. 3, the signal frequency dividing unit 310 may include a first impedance adjuster 311 and a second impedance adjuster 312. The first impedance adjuster 311 is respectively connected to a first end of the second rf switch 320 and a second end of the first rf switch 120, and is configured to adjust an impedance of the first signal transmission path, so that the first rf signal is transmitted to the second end of the first rf switch 120; the second impedance adjuster 312 is respectively connected to another first end of the second rf switch 320 and the receiving circuit 200, and is configured to adjust the second signal transmission path, so that the second rf signal is transmitted to the receiving circuit 200.
Specifically, when radio frequency signals of two different frequency bands are received, through the first impedance adjuster 311 and the second impedance adjuster 312, the signal frequency dividing unit 310 may selectively increase the impedance of one signal transmission path for a signal of one preset frequency band, and/or decrease the impedance of another signal of the preset frequency band, so that the signal transmission path can only transmit a signal of one preset frequency band. For example, the signal frequency dividing unit 310 may selectively increase the impedance of the first signal transmission path to the B3 frequency band signal and decrease the impedance to the N41 frequency band signal, so that the first signal transmission path only transmits the first radio frequency signal in the N41 frequency band, and blocks the second radio frequency signal in the B3 frequency band, so that when one input end of the signal frequency dividing unit 310 receives two signals in different frequency bands at the same time, the frequency bands of the signals are screened, and the signals in different frequency bands are output through different output ends. Furthermore, it can be understood that when the impedance of a signal transmission path is adjusted to be extremely small, the path can be regarded as a wire, and therefore, the quality of the radio frequency signal flowing through the signal transmission path is not affected.
Fig. 4 is a third structural block diagram of the rf front-end module 10 according to an embodiment, and referring to fig. 4, in one embodiment, the rf front-end module 10 further includes a first filter 410 and a second filter 420. The first filter 410 is respectively connected to a first terminal of the first switch element 300 and the transceiver circuit 100, and is configured to filter the first radio frequency signal. It is understood that in some other embodiments, a first filter 410 may be disposed between a first end of the first rf switch 120 and the input port, and another first filter 410 may be disposed between another first end of the first rf switch 120 and the receiving port, but because the receiving path and the transmitting path of the first rf signal are not turned on at the same time under the control of the first rf switch 120, based on the manner in which the first filter 410 of the embodiment of fig. 4 is disposed, the first filter 410 may be time-division multiplexed to support the transmission or reception of the first rf signal, thereby improving the integration level of the rf front-end module 10. The second filter 420 is respectively connected to the other first terminal of the first switch assembly 300 and the receiving circuit 200, and is configured to filter the second radio frequency signal. The filter only allows the radio frequency signal in the preset frequency band to pass through, and the filter may be a band pass filter, a low pass filter, or the like. It should be noted that, in the embodiment of the present application, the type of each filter is not further limited, and an appropriate filter may be selected according to the frequency band of the radio frequency signal to be filtered. Illustratively, the rf front-end module 10 of the present embodiment may be an rf LFEM device, which may be understood as an rf device integrating an rf switch, a low noise amplifier and a filter.
In one embodiment, with reference to fig. 4, the rf front-end module 10 further includes a multi-channel selection switch 500, two first terminals of the multi-channel selection switch 500 are connected to the two receiving ports in a one-to-one correspondence, two second terminals of the multi-channel selection switch 500 are connected to the transceiver circuit 100 and the receiving circuit 200 in a one-to-one correspondence, specifically, two second terminals of the multi-channel selection switch 500 are connected to the first receiving unit 110 and the receiving circuit 200 in a one-to-one correspondence, and the multi-channel selection switch 500 is configured to selectively output the first rf signal to any one of the receiving ports and output the second rf signal to the other receiving port. As can be seen from a comparison between fig. 2 and fig. 4, the multi-channel selection switch 500 can autonomously select the receiving ports corresponding to the first rf signal and the second rf signal, thereby effectively improving the control flexibility of the rf front-end module 10.
Fig. 5 is a block diagram of a radio frequency transceiving system according to an embodiment, and referring to fig. 5, in this embodiment, the radio frequency transceiving system includes a radio frequency transceiver 20, an antenna group, the radio frequency front end module 10, the first radio frequency device 30, and the third switch element 40, and in this embodiment, the radio frequency front end module 10 provided in the embodiment of fig. 4 is taken as an example for description.
The antenna group includes a first antenna ANT1, a second antenna ANT2, a third antenna ANT3 and a fourth antenna ANT 4. The antennas are used for transceiving radio frequency signals, wherein each antenna can be a directional antenna or a non-directional antenna. Illustratively, each antenna may be formed using any suitable type of antenna. For example, each 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.
The first radio frequency device 30 is for supporting transmission of said first radio frequency signal. The two receiving ports of the rf front-end module 10 are respectively connected to the rf transceiver 20, and the antenna port of the first rf device 30 is connected to the first antenna ANT 1. The first end of the third switch element 40 is connected to the first rf device 30, a second end of the third switch element 40 is connected to the input port SRS IN of the rf front-end module 10, the other three second ends of the third switch element 40 are respectively IN one-to-one correspondence with the second antenna ANT2, the third antenna ANT3, and the fourth antenna ANT4, and the third switch element 40 is configured to selectively output the first rf signal to any one of the antennas.
Further, based on the antenna group structure of multiple antennas, a Multiple Input Multiple Output (MIMO) mode for signals and a diversity mode can be implemented.
The MIMO mode is a key technology for improving system capacity and spectrum utilization rate in the fifth generation mobile communication (5G), and means that a plurality of transmitting antennas and receiving antennas are respectively used at a transmitting end and a receiving end, and is different from the conventional signal processing mode in that the MIMO mode simultaneously studies signal processing problems from two aspects of time and space, so that the data rate of the system can be improved, the bit error rate can be reduced, and the transmission quality of wireless signals can be improved without increasing bandwidth and transmitting power. Under 2 x 2MIMO mode, two antennas of transmitting end transmit different data at the same time, two antennas of receiving end receive different data at the same time, thus have sent the double data in the same time, reflect to the user plane that the network speed is becoming fast.
The diversity mode may be used to receive two different signals carrying the same information, and the difference between the two signals may include at least one of transmission path, frequency, time, diversity mode, etc., and the signals from the two receiving ports are processed according to a preset rule, so as to obtain the final received information. Through the above arrangement mode, the accuracy of information transmission can be effectively improved, namely, the radio frequency front end module 10 with higher reliability is provided.
In this embodiment, the first antenna ANT1 is configured to support transceiving of a first radio frequency signal in an N41 band and receiving of a second radio frequency signal in a B3 band, and the second antenna ANT2, the third antenna ANT3, and the fourth antenna ANT4 are configured to support transceiving of the first radio frequency signal in an N41 band. It is understood that, in order to obtain better communication quality, the communication device may be configured with a Sounding Reference Signal (SRS) function to detect the communication quality of each Signal. When used in a Time Division Duplex (TDD) base station, the SRS sounding result can be used for uplink and downlink simultaneously, i.e., TDD has reciprocity of uplink and downlink channels. Therefore, the sounding result of the SRS directly affects the download rate of 5G.
When the communication device has an SRS requirement of an N41 frequency band, the first antenna ANT1 needs to be switched to a path for diversity reception to N41, and the N41 round-trip signal output by the first rf device 30 needs to be transmitted to the first antenna ANT1 through the third antenna ANT2, the third antenna ANT3, and the fourth antenna ANT4, and also needs to be transmitted to the first antenna ANT1 through the third switch element 40, the input port SRS IN of the rf front-end module 10, the first rf switch 120, the first filter 410, and the first switch element 300, and then transmitted. At this time, the first antenna ANT1 transmits the received second rf signal in the B3 band to the rf transceiver 20 at the back end through the first switch module 300, the second filter 420 and the receiving circuit 200 to demodulate the signal. Furthermore, in the rf front-end module 10, when two paths connected to the first filter 410 and the second filter 420 operate simultaneously, the first switch module 300 performs multi-on operation to meet the CA combination requirement of B3+ N41, that is, the first switch module 300 ensures that the signals in the B3 band are switched to two paths of N41 and B3 simultaneously, and the signals in the B3 band only flow to the second signal transmission path corresponding to the second filter 420, and the signals in the N41 band only flow to the first signal transmission path corresponding to the first filter 410. Therefore, the two paths of signals cannot interfere with each other, and the receiving reliability of the radio frequency transceiving system for the second radio frequency signal in the B3 frequency band is effectively improved.
Fig. 6 is a second block diagram of the structure of the radio frequency transceiving system according to the first embodiment, and referring to fig. 6, in this embodiment, the antenna group further includes a fifth antenna ANT5, and the radio frequency transceiving system further includes a second radio frequency device 50 and a third radio frequency switch 60.
The second radio frequency device 50 is for supporting reception and transmission of said second radio frequency signal. Two first ends of the third rf switch 60 are respectively connected to the rf front-end module 10 and the second rf device 50 in a one-to-one correspondence manner, and two second ends of the third rf switch 60 are respectively connected to the first antenna ANT1 and the fifth antenna ANT5 in a one-to-one correspondence manner. In this embodiment, the fifth antenna ANT5 is configured to support transceiving of a first radio frequency signal in the N41 band and receiving of a second radio frequency signal in the B3 band, so that the second radio frequency signal in the B3 band can implement a dual-channel receiving function, and thus the MIMO mode or the diversity mode is selectively supported, so as to improve the receiving rate or accuracy of the radio frequency front end module 10 for the B3 band signal. Furthermore, by providing the third rf switch 60, one of the first antenna ANT1 and the fifth antenna ANT5 may be flexibly selected for main set reception and the other may be selected for diversity reception, so as to further improve the reliability thereof. Similarly to the embodiment of fig. 5, in this embodiment, no matter the B3 band of the communication device operates in the MIMO mode or the diversity mode, there is no phenomenon that the receiver demodulation is affected due to the data loss of the B3 band caused by the SRS of the N41 band.
Fig. 7 is a third structural block diagram of an rf transceiving system according to an embodiment, referring to fig. 7, in this embodiment, the rf transceiving system further includes two third rf devices 70, each of the third rf devices 70 is respectively configured to support receiving of the second rf signal, and the third switch assembly 40 includes a fourth rf switch 41, a fifth rf switch 42, and a sixth rf switch 43. Illustratively, the first rf device 30 may be an N41 band rf LPAF device (i.e., an rf device that integrates a low noise amplifier, a power amplifier, and a filter), and the second rf device 50 may be an rf device that supports multiple band reception functions, including the B3 band. Further, the structures of the two third rf devices 70 may not be identical, for example, one of the third rf devices 70 may be an LFEM device of N41 band, and the other third rf device 70 may be a low noise amplifier. It is to be understood that the above-described devices are illustrative only and are not intended to limit the scope of the present application.
A first terminal of the fourth rf switch 41 is connected to the third rf device 70, and a second terminal of the fourth rf switch 41 is connected to the second antenna ANT 2. A first terminal of the fifth rf switch 42 is connected to another third rf device 70, and a second terminal of the fifth rf switch 42 is connected to the third antenna ANT 3. A first end of the sixth rf switch 43 is connected to the first rf device 30, and four first ends of the sixth rf switch 43 are respectively connected to another first end of the fourth rf switch 41, another first end of the fifth rf switch 42, an input port SRS IN of the rf front-end module 10, and the fourth antenna ANT4 IN a one-to-one correspondence manner.
Based on the rf transceiving system as shown in fig. 7, the working principle of the rf transceiving system is specifically analyzed.
B3 receives control: the radio frequency signal received by one of the first antenna ANT1 and the fifth antenna ANT5 is subjected to main set reception by the third radio frequency switch 60 and the second radio frequency device 50 to the radio frequency transceiver 20, and the radio frequency signal received by the other one of the first antenna ANT1 and the fifth antenna ANT5 is subjected to diversity reception by the third radio frequency switch 60, the first switch component 300, the second filter 420, the receiving circuit 200, the multi-channel selection switch 500 to the radio frequency transceiver 20.
N41 receives control: the rf signal received by the fourth antenna ANT4 passes through the sixth rf switch 43, the first rf device 30 and the rf transceiver 20 to implement the main set reception. The radio frequency signal received by the third antenna ANT3 passes through the fifth radio frequency switch 42 and the third radio frequency device 70 to the radio frequency transceiver 20 to implement the master set MIMO reception. The radio frequency signal received by one of the first antenna ANT1 and the fifth antenna ANT5 is diversity received by the radio frequency transceiver 20 through the third radio frequency switch 60, the first switch component 300, the first filter 410, the first radio frequency switch 120, the first receiving unit 110, the multi-channel selection switch 500. The rf signal received by the second antenna ANT2 passes through the fourth rf switch 41 and the third rf device 70 to the rf transceiver 20 to implement diversity MIMO reception.
N41 SRS round emission control: the first switch assembly 300 switches to two-channel conduction. The transmission signal is output from the rf transceiver 20, passes through the first rf device 30 and the sixth rf switch 43, enters the rf front-end module 10 through the input port SRS IN, passes through the first rf switch 120, the first filter 410 and the first switch component 300, and then passes through the third rf switch 60 to the first antenna ANT1 for SRS. The transmission signal is output from the rf transceiver 20, passes through the first rf device 30, the sixth rf switch 43, and passes through the fourth rf switch 41 to the second antenna ANT2, so as to implement SRS. The transmission signal is output from the rf transceiver 20, passes through the first rf device 30, the sixth rf switch 43, and passes through the fifth rf switch 42 to the third antenna ANT3, so as to implement SRS. The transmitting signal is output from the rf transceiver 20, and then output to the fourth antenna ANT4 through the first rf device 30, the sixth rf switch 43, so as to implement SRS.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express a few embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, variations and modifications can be made without departing from the concept of the embodiments of the present application, and these embodiments are within the scope of the present application. Therefore, the protection scope of the embodiments of the present application shall be subject to the appended claims.
Claims (11)
1. A radio frequency front end module configured with an antenna port for connecting to an antenna, two receive ports for connecting to a radio frequency transceiver, and an input port for receiving a first radio frequency signal, the radio frequency front end module comprising:
the receiving and transmitting circuit is respectively connected with the input port and the receiving port and is used for selectively supporting the receiving processing of the first radio-frequency signal received by the antenna port and selectively supporting the transmission of the first radio-frequency signal received by the input port to the antenna port for transmission;
the receiving circuit is connected with the other receiving port and is used for supporting receiving processing of a second radio frequency signal, and the frequency band of the second radio frequency signal is different from that of the first radio frequency signal;
the antenna port is connected with the receiving circuit, the receiving circuit is connected with the antenna port, and the first switch component is used for selectively conducting a path between the antenna port and at least one of the receiving circuit and the receiving circuit.
2. The rf front-end module of claim 1, wherein the transceiver circuit comprises:
the first receiving unit is connected with one receiving port and used for receiving and amplifying a first radio frequency signal;
two first ends of the first radio frequency switch are respectively connected with the input port and the first receiving unit in a one-to-one correspondence manner, a second end of the first radio frequency switch is connected with a first end of the first switch assembly, and the first radio frequency switch is used for selectively transmitting the first radio frequency signal from the first switch assembly to the first receiving unit or selectively transmitting the first radio frequency signal from the input port to the first switch assembly.
3. The rf front-end module of claim 2, wherein the first switch assembly comprises a signal divider and a second rf switch;
the signal frequency dividing unit is respectively connected with the second end of the first radio frequency switch, the receiving circuit and the second radio frequency switch, and is used for controlling the first radio frequency signal to be transmitted to the first signal transmission channel and controlling the second radio frequency signal to be transmitted to the second signal transmission channel when the first radio frequency signal and the second radio frequency signal are transmitted simultaneously;
two first ends of the second radio frequency switch are respectively connected with the signal frequency dividing unit, a second end of the second radio frequency switch is connected with the antenna port, and the second radio frequency switch is used for selecting to conduct a signal transmission path corresponding to a transmitted radio frequency signal when one of the first radio frequency signal and the second radio frequency signal is transmitted; and when the first radio frequency signal and the second radio frequency signal are transmitted simultaneously, the first signal transmission channel and the second signal transmission channel are selected to be conducted.
4. The RF front-end module of claim 3, wherein the signal dividing unit comprises:
the first impedance adjuster is respectively connected with a first end of the second radio frequency switch and a second end of the first radio frequency switch, and is used for adjusting the impedance on the first signal transmission path so as to enable the first radio frequency signal to be transmitted to the second end of the first radio frequency switch;
and the second impedance adjuster is respectively connected with the other first end of the second radio frequency switch and the receiving circuit and is used for adjusting the second signal transmission path so as to transmit a second radio frequency signal to the receiving circuit.
5. The rf front-end module of claim 1, further comprising:
the first filter is respectively connected with a first end of the first switch component and the transceiver circuit and is used for filtering the first radio-frequency signal;
and the second filter is respectively connected with the other first end of the first switch component and the receiving circuit and is used for filtering a second radio-frequency signal.
6. The rf front-end module of claim 1, further comprising:
the two first ends of the multi-channel selection switch are respectively connected with the two receiving ports in a one-to-one correspondence mode, the two first ends of the multi-channel selection switch are respectively connected with the transceiver circuit and the receiving circuit in a one-to-one correspondence mode, and the multi-channel selection switch is used for selectively outputting the first radio-frequency signals to any one receiving port and outputting the second radio-frequency signals to the other receiving port.
7. The RF front-end module of any one of claims 1 to 6, wherein the first RF signal is a signal in the N41 band and the second RF signal is a signal in the B3 band.
8. A radio frequency transceiver system, comprising:
a radio frequency transceiver;
an antenna group comprising a first antenna, a second antenna, a third antenna and a fourth antenna;
the RF front-end module as claimed in any one of claims 1 to 7, wherein two receiving ports of the RF front-end module are respectively connected to the RF transceiver, and an antenna port of the first RF device is connected to the first antenna;
a first radio frequency device to support transmission of the first radio frequency signal;
the first end of the third switch component is connected with the first radio frequency device, one second end of the third switch component is connected with the input port of the radio frequency front end module, the other three second ends of the third switch component are respectively in one-to-one correspondence with the second antenna, the third antenna and the fourth antenna, and the third switch component is used for selectively outputting the first radio frequency signal to any antenna.
9. The radio frequency transceiver system of claim 8, wherein the antenna group further comprises a fifth antenna, and wherein the radio frequency transceiver system further comprises:
a second radio frequency device for supporting reception and transmission of the second radio frequency signal;
and two first ends of the third radio frequency switch are respectively connected with the radio frequency front end module and the second radio frequency device in a one-to-one correspondence manner, and two second ends of the third radio frequency switch are respectively connected with the first antenna and the fifth antenna in a one-to-one correspondence manner.
10. The rf transceiver system of claim 8, further comprising two third rf devices, each of the third rf devices being configured to support receiving the second rf signal, the third switch assembly comprising:
a first end of the fourth rf switch is connected to the third rf device, and a second end of the fourth rf switch is connected to the second antenna;
a first end of the fifth radio frequency switch is connected with the other third radio frequency device, and a second end of the fifth radio frequency switch is connected with the third antenna;
and the first ends of the sixth radio frequency switch are connected with the first radio frequency device, and the four first ends of the sixth radio frequency switch are respectively connected with the other first end of the fourth radio frequency switch, the other first end of the fifth radio frequency switch, the input port of the radio frequency front-end module and the fourth antenna in a one-to-one correspondence manner.
11. A communication device comprising a radio frequency transceiver system according to any one of claims 8 to 10.
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| CN202110292724.8A CN115118297B (en) | 2021-03-18 | 2021-03-18 | Radio frequency front end module, radio frequency receiving and transmitting system and communication equipment |
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| CN202110292724.8A CN115118297B (en) | 2021-03-18 | 2021-03-18 | Radio frequency front end module, radio frequency receiving and transmitting system and communication equipment |
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| CN115118297B CN115118297B (en) | 2023-11-10 |
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| CN115441895A (en) * | 2022-11-10 | 2022-12-06 | 荣耀终端有限公司 | Radio frequency switch device, radio frequency front end module, radio frequency circuit and electronic equipment |
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| CN115118297B (en) | 2023-11-10 |
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