RF L-DRX devices, RF transceiver systems and communication equipment

Abstract

The present application provides a radio frequency L-DRX device, a radio frequency transceiver system and a communication device, wherein the radio frequency L-DRX device is configured with a receiving port and a transmitting port for connecting a radio frequency transceiver and an antenna port for connecting an antenna, and the radio frequency L-DRX device includes: a first switch unit, connected to the antenna port and the transmitting port, respectively, for selectively conducting a receiving path where the antenna port is located and a transmitting path where the transmitting port is located; a first filter unit, arranged in the receiving path or the transmitting path, for filtering a received radio frequency signal; a first low noise amplifier, the first low noise amplifier is arranged in the receiving path and the output end of the first low noise amplifier is connected to the receiving port, for amplifying the filtered radio frequency signal for output through the receiving port, which can save the area occupied by the substrate, improve the integration and reduce the cost.

Description

Technical Field

[0001] The present application relates to the field of radio frequency technology, and in particular to a radio frequency L-DRX device, a radio frequency transceiver system and a communication device. Background Art

[0002] With the development and progress of technology, 5G mobile communication technology has gradually begun to be applied to electronic devices. The communication frequency of 5G mobile communication technology is higher than that of 4G mobile communication technology. Generally, multiple discrete switches are set in the receiving path and transmitting path in the frequency system to support the switching between the transmission and reception of RF signals, which is costly and occupies a large area of ​​the substrate. Summary of the invention

[0003] The embodiments of the present application provide a radio frequency L-DRX device, a radio frequency transceiver system and a communication device, which can save the area occupied by the substrate, improve the integration and reduce the cost.

[0004] A radio frequency L-DRX device is configured with a receiving port and a transmitting port for connecting to a radio frequency transceiver and an antenna port for connecting to an antenna, the device comprising:

[0005] A first switch unit is connected to the antenna port and the transmission port, respectively, and is used to selectively conduct the receiving path where the antenna port is located and the transmitting path where the transmission port is located;

[0006] A first filtering unit, arranged in the receiving path or the transmitting path, for filtering the received radio frequency signal;

[0007] A first low noise amplifier is arranged in the receiving path and an output end of the first low noise amplifier is connected to a receiving port, and is used for amplifying the filtered radio frequency signal to output it through the receiving port.

[0008] A radio frequency transceiver system, comprising:

[0009] An antenna group, comprising at least a first antenna and a second antenna, for transmitting and receiving radio frequency signals;

[0010] As in the above-mentioned RF L-DRX device, the antenna port of the RF L-DRX device is connected to the first antenna;

[0011] A radio frequency PA Mid device, used to support amplification, transmission and reception control of the radio frequency signal;

[0012] A multi-channel selection switch includes a first end and multiple second ends, wherein the first end is connected to the RF PA Mid device, one second end is connected to the second antenna, and one second end is connected to the transmission port of the RF L-DRX device, and is used to selectively turn on the transmission paths of the first antenna and the second antenna to support the SRS function.

[0013] A communication device, comprising:

[0014] RF transceiver, and

[0015] The above-mentioned radio frequency transceiver system connected to the radio frequency transceiver.

[0016] The above-mentioned RF L-DRX device, RF transceiver system and communication equipment, the first switch unit, the first filter unit and the first low noise amplifier in the RF L-DRX device are integrated and packaged in the same chip, which can save the area of ​​the substrate occupied by each device, free up physical space for other modules to optimize performance, and reduce costs. At the same time, by configuring the RF L-DRX device with a round-robin port to realize the transmission and reception control of the RF signal, the additional power supply layout and logic control routing can be reduced, which is more conducive to the signal integrity on the substrate, reduces the mutual interference between signals, and also reduces the difficulty of substrate layout and wiring. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 This is one of the structural schematic diagrams of a radio frequency L-DRX device according to an embodiment;

[0019] Figure 2 This is a second structural schematic diagram of a radio frequency L-DRX device according to an embodiment;

[0020] Figure 3a This is a third structural diagram of a radio frequency L-DRX device according to an embodiment;

[0021] Figure 3b This is a fourth structural diagram of a radio frequency L-DRX device according to an embodiment;

[0022] Figure 4 A schematic diagram of the package pins of a radio frequency L-DRX device according to an embodiment;

[0023] Figure 5A schematic diagram of the packaging structure of a radio frequency L-DRX device according to an embodiment;

[0024] Figure 6a This is one of the structural schematic diagrams of a radio frequency transceiver system according to an embodiment;

[0025] Figure 6b This is a second structural diagram of a radio frequency transceiver system according to an embodiment;

[0026] Figure 7 This is one of the structural schematic diagrams of a radio frequency PA Mid device according to an embodiment;

[0027] Figure 8 This is a second structural diagram of a radio frequency PA Mid device according to an embodiment;

[0028] Figure 9a This is a third structural diagram of a radio frequency PA Mid device according to an embodiment;

[0029] Figure 9b This is a fourth structural diagram of a radio frequency PA Mid device according to an embodiment;

[0030] Fig.10a This is one of the schematic diagrams of a transmission application scenario in which a communication device feeds back channel information according to an embodiment;

[0031] Fig.10b This is a second schematic diagram of a transmission application scenario in which a communication device feeds back channel information according to an embodiment;

[0032] Fig.11 A schematic diagram of a mode structure of an SRS antenna transmitting in turn according to an embodiment;

[0033] Fig.12a The third structural diagram of the radio frequency transceiver system of an embodiment;

[0034] Figure 12b This is a fourth structural diagram of a radio frequency transceiver system according to an embodiment;

[0035] Fig.13a This is a fifth structural diagram of a radio frequency transceiver system according to an embodiment;

[0036] Fig.13b This is a sixth structural diagram of a radio frequency transceiver system according to an embodiment;

[0037] Fig.14 A schematic diagram of the structure of a communication device according to an embodiment. DETAILED DESCRIPTION

[0038] In order to facilitate the understanding of the present application, in order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application, and the preferred embodiments of the present application are given in the accompanying drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thoroughly understood. The present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In the description of the present application, the meaning of "several" is at least one, such as one, two, etc., unless otherwise clearly and specifically defined.

[0040] The radio frequency transceiver system involved in the embodiment of the present application can be applied to a communication device with a wireless communication function, and the communication device can be a handheld device, a vehicle-mounted device, a wearable device, a computing device, or other processing devices connected to a wireless modem, as well as various forms of user equipment (UE) (e.g., a mobile phone), a mobile station (MS), etc. For the convenience of description, the above-mentioned devices are collectively referred to as communication devices. Network devices may include base stations, access points, etc.

[0041] In an embodiment of the present application, a radio frequency L-DRX device is provided. Figure 1 As shown, in one embodiment, the RF L-DRX device 10 is configured with a receiving port RXOUT for connecting to a RF transceiver, a transmitting port SRS, and an antenna port ANT for connecting to an antenna. The RF L-DRX device 10 is understood as a diversity receiving low noise amplifier (Low Noise Amplifier-Diversity RX). In one embodiment, the RF L-DRX device 10 is a single-band L-DRX device, which can realize the reception and transmission control of a RF signal.

[0042] In one of the embodiments, the RF L-DRX device 10 can be understood as a packaged chip, and the receiving port RXOUT, the transmitting port SRS and the antenna port ANT configured in the device can be understood as the RF pin terminals of the RF L-DRX device 10, which are used to connect with various external devices. Specifically, the receiving port RXOUT and the transmitting port SRS can be used to connect with the RF transceiver. The antenna port ANT can be used to connect with the antenna. Exemplarily, the antenna port ANT can input the RF signal received by the antenna to the RF L-DRX device 10, and can also transmit the RF signal processed by the RF L-DRX device 10 through the antenna. The receiving port RXOUT can process the RF signal received by the RF L-DRX device 10 through the antenna port ANT and output it to the RF transceiver to realize the reception control of the RF signal, and the transmitting port SRS can receive the RF signal output by the RF transceiver, so that the RF L-DRX device 10 can realize the transmission control of the received RF signal.

[0043] The radio frequency signal can be a 5G signal, such as a 5G signal in the N41 frequency band, a radio frequency signal in the N77 (N78) frequency band, a radio frequency signal in the N79 frequency band, etc. Specifically, the operating frequency band of N41 is 496MHz-2690MHz, the operating frequency band of N77 is 3.3GHz-4.2GHz, the operating frequency band of N78 is 3.3GHz-3.8GHz, and the operating frequency band of N79 is 4.4GHz-5.0GHz. It should be noted that the operating frequency band of N77 covers the operating frequency band of N78. That is, when the radio frequency L-DRX device 10 can support the transmission and reception of radio frequency signals in the N77 frequency band, it can also support the transmission and reception of radio frequency signals in the N78 frequency band.

[0044] In one of the embodiments, the radio frequency signal may also be an LTE signal, a WiFi signal, etc. In the embodiment of the present application, no further limitation is made to the working frequency band of the radio frequency signal.

[0045] In one embodiment, the RF L-DRX device 10 includes a first switch unit 110, a first filter unit 120 and a first low noise amplifier 130. The first switch unit 110 is connected to the antenna port ANT and the transmission port SRS, respectively, and is used to receive and send RF signals through the antenna port ANT, and is also used to transmit RF signals transmitted by the RF transceiver through the transmission port SRS, so as to selectively conduct the connection between the antenna port ANT and the receiving path of the RF L-DRX device 10, or selectively conduct the connection between the antenna port ANT and the transmitting path of the RF L-DRX device 10. The receiving path of the RF L-DRX device 10 can be understood as the path between the antenna port ANT and the receiving port RXOUT, and the transmitting path of the RF L-DRX device 10 can be understood as the path between the antenna port ANT and the transmission port SRS.

[0046] In one embodiment, reference Figure 1 The first filter unit 120 can be arranged in the receiving path for filtering the received RF signal. The first filter unit 120 arranged in the receiving path can be understood as being arranged in the receiving path at the front end of the first switch unit 110, that is, the first filter unit 120 is arranged between the first switch unit 110 and the receiving port RXOUT.

[0047] In one embodiment, if Figure 2 As shown, the first filter unit 120 can be arranged in the transmission path for filtering the received RF signal. The first filter unit 120 being arranged in the transmission path can be understood as the first filter unit 120 being arranged at the rear end of the first switch unit 110, that is, the first filter unit 120 is arranged between the first switch unit 110 and the transmission port SRS.

[0048] The 3GPP protocol has clear requirements for the emitted radiated spurious signals, and a filter can be used to filter out the out-of-band spurious signals. Figure 1 In the RF L-DRX device 10 shown, the first filtering unit 120 in this embodiment is arranged between the first switching unit 110 and the transmission port SRS. On the premise of ensuring that the receiving path only allows the RF signal of the preset frequency band to pass through, it also takes into account that the transmitting path also only allows the RF signal of the preset frequency band to pass through, and at the same time, it can also filter out spurious waves other than the preset frequency band.

[0049] In one embodiment, the first filtering unit 120 includes a bandpass filter or a low-pass filter. It should be noted that the type of the first filtering unit 120 can be selected according to the working frequency band of the radio frequency signal supported by the radio frequency L-DRX device 10. Exemplarily, when the RF signal supported by the RF L-DRX device 10 is a 5G signal in the N41 frequency band, its first filtering unit 120 may be a low-pass filter that only allows RF signals in the N41 frequency band to pass through, while also filtering out spurious waves other than the N41 frequency band; when the RF signal supported by the RF L-DRX device 10 is a 5G signal in the N77 frequency band, its first filtering unit 120 may be a band-pass filter that only allows RF signals in the N77 frequency band to pass through, while also filtering out spurious waves other than the N77 frequency band; when the RF signal supported by the RF L-DRX device 10 is a 5G signal in the N79 frequency band, its first filtering unit 120 may be a band-pass filter that only allows RF signals in the N79 frequency band to pass through, while also filtering out spurious waves other than the N79 frequency band.

[0050] The first low noise amplifier 130 is disposed in the receiving path, and an output end of the first low noise amplifier 130 is connected to the receiving port RXOUT, for amplifying the filtered RF signal and outputting it through the receiving port RXOUT.

[0051] It should be noted that the first filter unit 120, the first low noise amplifier 130 and the first switch unit 110 in the RF L-DRX device 10 can all support the control of receiving and transmitting RF signals of a preset frequency band. Exemplarily, the RF signal of the preset frequency band can be a 5G signal of the N41 frequency band, a 5G signal of the N77 frequency band or a 5G signal of the N79 frequency band.

[0052] The above-mentioned RF L-DRX device 10 can integrate the first switch unit 110 and the first filter unit 120 into the device, thereby improving the integration of the RF L-DRX device 10 and saving the resources of the substrate (such as a PCB board) occupied by the first switch unit 110 and the first filter unit 120; at the same time, by configuring a round-robin port SRS on the RF L-DRX device 10 and connecting the first switch unit 110 to the round-robin port SRS, the RF L-DRX device 10 has the functions of receiving and transmitting RF signals at the same time, which simplifies the power supply, logic control and PCB layout and wiring of the RF L-DRX device 10 and saves costs.

[0053] In one embodiment, the first switch unit 110 includes a control end and a plurality of selection ends, the control end is connected to the antenna port ANT, and a selection end is connected to the round-robin port SRS. When the first filter unit 120 is set in the receiving path, a selection end of the first switch unit 110 is connected to the first filter unit 120. That is, one end of the first filter unit 120 is connected to the input end of the first low-noise amplifier 130, and the other end of the filter unit is connected to a selection end of the first switch unit 110, for filtering the RF signal received by the receiving channel.

[0054] Specifically, the first switch unit 110 may be a radio frequency SPDT switch. That is, the control end of the radio frequency SPDT switch is connected to the antenna port ANT, the first selection end of the radio frequency SPDT switch is connected to the first filtering unit 120, and the second selection end of the radio frequency SPDT switch is connected to the transmission port SRS to selectively conduct the receiving path and the transmitting path of the radio frequency L-DRX device 10.

[0055] Exemplarily, taking the first switch unit 110 as a radio frequency SPDT switch as an example, the radio frequency L-DRX device 10 controls the reception and transmission of radio frequency signals:

[0056] Receiving control: The RF signal received by the antenna is received through the antenna port ANT, that is, the RF signal enters the RF SPDT switch through the antenna port ANT, and the RF SPDT switch is switched to the selection end connected to the first filtering unit 120 to turn on the receiving path, through the first low-noise amplifier 130 to the receiving port RXOUT, and the receiving port RXOUT outputs the received RF signal to the RF transceiver to complete the receiving control of the RF signal.

[0057] Transmission control: When the RF L-DRX device 10 needs to implement SRS transmission, the RF signal output by the RF transceiver is received through the transmission port SRS, that is, the RF signal is input from the transmission port SRS to the RF SPDT switch, and the RF SPDT switch is switched to the selection end connected to the transmission port SRS to turn on the transmission path (also called SRS path), which is radiated and output by the antenna through the antenna port ANT to complete the transmission control of the RF signal.

[0058] refer to Figure 2 In one embodiment, the first filter unit 120 can also be set in the transmission path, that is, the first filter unit 120 is set at the rear end of the first switch unit 110. The control end of the first switch unit 110 is connected to the antenna port ANT through the first filter unit 120, a selection end of the first switch unit 110 is connected to the transmission port SRS, and a selection end of the first switch unit 110 is connected to the input end of the first low noise amplifier 130. One end of the first filter unit 120 is connected to the control end of the first switch unit 110, and the other end of the first filter unit 120 is connected to the antenna port ANT, that is, the first filter unit 120 is set between the first switch unit 110 and the antenna port ANT, which can realize filtering processing of the radio frequency signals transmitted by the receiving path and the transmitting path, and can improve the out-of-band suppression capability of the transmitting path, and thus can take into account the transmission performance of the transmitting path and the receiving path at the same time.

[0059] Exemplarily, taking the first switch unit 110 as a radio frequency SPDT switch as an example, the radio frequency L-DRX device 10 controls the reception and transmission of radio frequency signals:

[0060] Receiving control: The RF signal is input to the RF L-DRX device 10 through the antenna port ANT, and is transmitted to the RF SPDT switch through the first filter. The RF SPDT switch switches to the selection end connected to the first low-noise amplifier 130 to turn on the receiving path, and then passes through the first low-noise amplifier 130 to the receiving port RXOUT, and outputs the received RF signal to the RF transceiver to complete the receiving control of the RF signal.

[0061] Transmission control: When the RF L-DRX device 10 needs to implement SRS transmission, the RF signal output by the RF transceiver is received through the transmission port SRS, that is, the RF signal is input from the transmission port SRS to the RF SPDT switch, and the RF SPDT switch is switched to the selection end connected to the first filtering unit 120 to turn on the transmission path (also called the SRS path), through the first filtering unit 120 to the antenna port ANT, and finally radiated and output through the antenna to complete the transmission control of the RF signal.

[0062] The RF L-DRX device 10 in the above embodiment integrates the first switch unit 110, the first filter unit 120, and the first low noise amplifier 130 into the same chip, which can save the area of ​​the substrate occupied by each device (for example, at least a total of 21mm is saved). 2 The area of ​​the first switching unit 110 is reduced to free up physical space for other modules to optimize performance, thereby reducing costs. At the same time, by configuring the radio port in the RF L-DRX device 10 to realize the control of the reception and transmission of the RF signal, the additional power supply layout and logic control routing can be reduced, which is more conducive to the signal integrity on the substrate, reduces the mutual interference between signals, and also reduces the difficulty of substrate layout and wiring. At the same time, the first filter is set at the rear end of the first switching unit 110, which can improve the out-of-band suppression capability of the transmission path, thereby taking into account the transmission performance of the transmission path and the receiving path at the same time.

[0063] like Figure 3a and 3b As shown, in one embodiment, the RF L-DRX device 10 further includes a control unit 140 connected to the first low noise amplifier 130 and the first switch unit 110 respectively. The control unit 140 is used to adjust the gain coefficient of the first low noise amplifier 130 to reduce the link loss of the receiving path, and the control unit 140 is also used to control the first switch unit 110 to select to conduct the receiving path or the transmitting path.

[0064] Specifically, the control unit 140 can be a mobile industry processor interface (MIPI)-RF Front End Control Interface (RFFE) unit. When the control unit 140 is a MIPI-RFFE control unit, its RF L-DRX device 10 is also configured with a clock signal input pin CLK, a unidirectional / bidirectional data signal input or bidirectional pin SDATAS, a power pin VDD, a reference voltage pin VIO, etc.

[0065] For example, the MIPI-RFFE control unit may output clock and data signals to corresponding pins of the RF SPDT switch to realize on / off control of the receiving path or the transmitting path. Accordingly, the MIPI-RFFE control unit may output clock and data signals to the first low noise amplifier 130 to realize gain adjustment control of the first low noise amplifier 130.

[0066] In one embodiment, each device included in the RF L-DRX device 10 can be integrated into the same chip through a packaging process. Figure 4 As shown, each pin in the chip corresponds to a plurality of ports configured by the RF L-DRX device 10, and is integrated through packaging, such as Figure 5 As shown, the integration level of the RF L-DRX device 10 can be improved.

[0067] The first switch unit 110 in the embodiment of the present application may also be an electronic switch tube, a MIPI interface switch and / or a general-purpose input / output (GPIO) interface switch, or other switch units that can be integrated in the RF L-DRX device 10. The control unit 140 may be set according to the type of the first switch unit 110, for example, it may also be a GPIO control unit, etc. It should be noted that the embodiment of the present application does not further limit the types of the first switch unit 110 and the control unit 140.

[0068] It should be noted that the RF L-DRX device 10 provided in the embodiment of the present application can support the transmission and reception control of 5G signals in the N41, N77, N79 frequency bands, etc.

[0069] The present application also provides a radio frequency transceiver system. Figure 6a and Figure 6b As shown, in one embodiment, the RF transceiver system includes an antenna group 20, a RF PA Mid device 30, a multi-channel selection switch 40 and the RF L-DRX device 10 in any of the above embodiments.

[0070] In one embodiment, the antenna group 20 includes at least a first antenna Ant0 and a second antenna Ant1. The first antenna Ant0 and the second antenna Ant1 are both antennas that can support radio frequency signals with different operating frequency bands, such as LTE signals, WiFi signals, and 5G NR signals. Among them, the first antenna Ant0 can be used to receive and transmit (referred to as transceiver) radio frequency signals of different frequency bands, and the second antenna Ant1 can be used to transmit and receive radio frequency signals of different frequency bands.

[0071] In one embodiment, the first antenna Ant0 and the second antenna Ant1 may be directional antennas or non-directional antennas. Exemplarily, the first antenna Ant0 and the second antenna Ant1 may be formed using any suitable type of antenna. For example, the first antenna Ant0 and the second antenna Ant1 may include an antenna having a resonant element formed by the following antenna structures: an array antenna structure, a loop antenna structure, a patch antenna structure, a slot antenna structure, a spiral antenna structure, a strip antenna, a monopole antenna, a dipole antenna, etc. Different types of antennas may be used for frequency band combinations of different RF signals.

[0072] The antenna group 20 may further include a third antenna and a fourth antenna. In the embodiment of the present application, the number and type of antennas included in the antenna group 20 are not further limited and may be set according to actual needs.

[0073] The RF PA Mid (Power Amplifier Modules including Duplexers) device 30 is used to support the amplification, transceiver and control of RF signals. That is, the RF PA Mid device 30 can realize the reception and transmission control of a single RF signal. Exemplarily, the RF PA Mid device 30 is also a packaged chip, which is configured with a receiving path for receiving RF signals and a transmitting path for transmitting RF signals to realize the transceiver and control of RF signals.

[0074] The antenna port ANT of the RF L-DRX device 10 is connected to the first antenna Ant0. When the RF L-DRX device 10 is connected to the first antenna Ant0, the reception control of the RF signal received by the first antenna Ant0 can be realized through the switching control of the first switch unit 110, and the transmission control of the RF signal can also be realized, and then output through the first antenna Ant0.

[0075] The multi-channel selection switch 40 includes a first end and multiple second ends, the first end is connected to the RF PA Mid device 30, a second end is connected to the second antenna Ant1, and a second end is connected to the transmission port SRS of the RF L-DRX device 10, and is used to selectively turn on the transmission paths of the first antenna Ant0 and the second antenna Ant1 to support the SRS function.

[0076] It should be noted that the number of the second ends of the multi-channel selection switch 40 can be set according to the number of antennas included in the antenna group 20. Exemplarily, when the number of antennas in the antenna group 20 is two, the number of the second ends of the multi-channel selection switch 40 is also two, and the multi-channel selection switch 40 can be a radio frequency SPDT switch; when the number of antenna groups 20 is four, the number of the second ends of the multi-channel selection switch 40 is also four, and the multi-channel selection switch 40 can be a radio frequency SP4T switch.

[0077] The RF system in the above embodiment can realize the round-robin transmission of RF signals between the first antenna Ant0 and the second antenna Ant1 based on the round-robin port SRS and the first switch unit 110 configured by the RF L-DRX device 10, by cooperating with the multi-channel selection switch 40, and can also realize the dual-channel reception of the two RF signals received by the first antenna Ant0 and the second antenna Ant1 based on the receiving path of the RF L-DRX device 10 and the receiving path of the RF PA Mid device 30. At the same time, the RF system provided in the embodiment of the present application can realize the round-robin transmission of RF signals between the first antenna Ant0 and the second antenna Ant1 based on the packaging setting of the RF L-DRX device 10, the RF PA Mid device 30 and a multi-channel selection switch 20, without the need to set up multiple independent cascade switches, thereby reducing the cost and the area of ​​the substrate occupied by each device in the RF system.

[0078] like Figure 7 As shown, in one embodiment, the RF PA Mid device 30 is configured with an RF transmission port RFIN, an RF receiving port RXOUT, and an RF antenna port ANT. The RF PA Mid device 30 can be understood as a packaged chip, and the RF transmission port RFIN, the RF receiving port RXOUT, and the RF antenna port ANT configured in the device can be understood as the RF pin terminals of the RF PA Mid device 30, which are used to connect with various external devices. Specifically, the RF transmission port RFIN and the RF receiving port RXOUT can be used to connect with the RF transceiver. The RF antenna port ANT can be used to connect with the first antenna Ant0.

[0079] Exemplarily, the RF antenna port ANT can input the RF signal received by the first antenna Ant0 to the RF PA Mid device 30, and can also transmit the RF signal processed by the RF PA Mid device 30 through the first antenna Ant0. The RF receiving port RXOUT can process the RF signal received by the RF PA Mid device 30 through the RF antenna port ANT and output it to the RF transceiver to achieve reception control of the RF signal, and the RF transmitting port can receive the RF signal output by the RF transceiver, so that the RF PA Mid device 30 can achieve transmission control of the received RF signal.

[0080] In one embodiment, the radio frequency PA Mid device 30 includes a power amplifier 310 , a second filtering unit 320 and a second switching unit 330 .

[0081] The power amplifier 310, the input end of the power amplifier 310 is connected to the RF transmission port RFIN, and is used to receive the RF signal transmitted by the RF transceiver and perform power amplification processing on the RF signal; the second filter unit 320 is connected to the RF antenna port ANT, and is used to filter the received RF signal; the second switch unit 330 is respectively connected to the output end of the power amplifier 310, the RF receiving port RXOUT, and the filter unit. Among them, the receiving path of the RF PA Mid device 30 can be understood as the path between the RF antenna port ANT and the RF receiving port RXOUT, and the transmitting path of the RF PA Mid device 30 can be understood as the path between the RF antenna port ANT and the RF transmitting port RFIN.

[0082] In one embodiment, the second filter unit 320 includes a low-pass filter or a band-pass filter. It should be noted that the type of the second filter unit 320 can be selected according to the operating frequency band of the RF signal that the RF PA Mid device 30 can support. Exemplarily, the filtering type of the second filter unit 320 can be the same as the type of the first filter unit 120, and both can implement filtering processing of the RF signal received and transmitted by the RF system.

[0083] The second switch unit 330 can be used to select and conduct the receiving path where the RF receiving port RXOUT is located and the transmitting path where the RF transmitting port RFIN is located. Specifically, the second switch unit 330 can be a RF SPDT switch. That is, the control end of the RF SPDT switch is connected to the second filtering unit 320, the first selection end of the RF SPDT switch is connected to the RF receiving port RXOUT, and the second selection end of the RF SPDT switch is connected to the output end of the power amplifier 310 to selectively conduct the receiving path and the transmitting path of the RF PA Mid device 30.

[0084] In one embodiment, the RF PA Mid device 30 is configured with a coupled output port CPLOUT, and the RF PAMid device 30 also includes a coupling module 340. The coupling module 340 includes a coupling unit 341 and a coupling switch 343. The coupling unit 341 is used to couple the RF signal in the transmission path so as to achieve coupled output of the RF signal, and can be used to measure the coupled power of the RF signal. Specifically, the coupling unit 341 includes an input terminal a, an output terminal b, a first coupling terminal c, and a second coupling terminal d. At the same time, the coupling unit 341 also includes a main line extending between the input terminal a and the output terminal b, and a secondary line extending between the first coupling terminal c and the second coupling.

[0085] The input end a of the coupling unit 341 is connected to the second filtering unit 320, the output end b of the coupling unit 341 is connected to the RF antenna port ANT, the first coupling end c is used to couple the RF signal received by the input end a and output a forward coupling signal; the second coupling end d is used to couple the reflected signal of the RF signal received by the output end b and output a reverse coupling signal. Based on the forward coupling signal output by the first coupling end c, the forward power information of the RF signal can be detected; based on the reverse coupling signal output by the second coupling end d, the reverse power information of the RF signal can be detected, and the detection mode is defined as a reverse power detection mode.

[0086] The coupling switch 343 is respectively connected to the first coupling end c, the second coupling end d and the coupling output port CPLOUT, and is used to selectively conduct the first coupling path between the first coupling end c and the coupling output port CPLOUT to detect the forward power of the RF signal, and define the detection mode as a reverse power detection mode, or conduct the second coupling path between the second coupling end d and the coupling output port CPLOUT to detect the reverse power of the RF signal, and define the detection mode as a reverse power detection mode. That is, the coupling switch 343 is used to switch between the forward power detection mode and the reverse power detection mode. Specifically, the coupling unit 341 includes two directional couplers connected in reverse series.

[0087] In this embodiment, the RF PA Mid device 30 is only provided with one coupling output port CPLOUT. Since the RF signals of multiple frequency bands are not transmitted simultaneously, one coupling output port CPLOUT can also meet the communication requirements, and also reduce the complexity of the RF routing inside the RF PA Mid device 30, and also can improve the isolation performance of each routing of the RF PA Mid device 30.

[0088] Exemplarily, taking the second switch unit 330 as a radio frequency SPDT switch and the radio frequency signal as a 5G signal of the N41 frequency band as an example, the radio frequency PA Mid device 30 controls the reception and transmission of the radio frequency signal:

[0089] Transmission control: The RF signal output by the RF transceiver is received through the RF transmission port RFIN, that is, the RF signal is transmitted from the RF transmission port RFIN through the power amplifier 310 and the RF SPDT switch, and is switched to the second filter unit 320 through the RF SPDT switch to turn on the transmission path, and is radiated and output by the antenna through the second filter unit 320, the coupling unit 341, and the RF antenna port ANT to complete the transmission control of the RF signal.

[0090] Receiving control: The RF signal is received by the receiving antenna through the RF antenna port ANT, that is, the RF signal enters the coupling unit 341 through the RF antenna port ANT, and enters the control end of the RF SPDT switch through the second filtering unit 320, and the RF SPDT switch is switched to the RF receiving port RXOUT, and the RF signal is output to the RF transceiver through the RF receiving port RXOUT to complete the receiving control of the RF signal.

[0091] like Figure 8 As shown, in one embodiment, when the RF PA Mid device 30 is used to support the transceiver control of RF signals in the N77 or N97 frequency band, the RF PA Mid device 30 further includes: a second low noise amplifier 350, the input end of the second low noise amplifier 350 is connected to the second switch unit 330, and the output end of the second low noise amplifier 350 is connected to the RF receiving port RXOUT, which is used to amplify the RF signal in the receiving path. That is, the second low noise amplifier 350 is set in the receiving path of the RF PA Mid device 30 to achieve amplification of the RF signal to meet the communication requirements of the receiving path.

[0092] like Figure 9a and 9b As shown, in one embodiment, the multi-channel selection switch 40 is integrated in the RF PA Mid device 30, wherein the integrated RF PA Mid device 30 is configured with multiple RF antenna ports (SRS1-SRS4), and the second ends of the multi-channel selection switch 40 are connected to the RF antenna ports (SRS1-SRS4) one by one.

[0093] Exemplarily, the multi-channel selection switch 40 is taken as an example of a radio frequency SPDT switch. Among them, the first end of the radio frequency SPDT switch is connected to the output end of the coupling unit 341, and the second end of the radio frequency SPDT switch is connected to the first antenna Ant0 via the first radio frequency antenna port SRS1, and the second end of the radio frequency SPDT switch is connected to the second antenna Ant1 via the second radio frequency antenna port ANT and the round-robin port SRS of the radio frequency L-DRX device 10, so as to realize the round-robin transmission of the radio frequency signal between the first antenna Ant0 and the second antenna Ant1, thereby improving the integration of the radio frequency PA Mid device 30, reducing the cost, and reducing the area of ​​the substrate occupied by each device in the radio frequency system.

[0094] In one embodiment, the RF PA Mid device 30 further includes at least one control unit 360. Figure 7 When the RF PA Mid device 30 supports the control of receiving and transmitting RF signals in the N41 frequency band, the number of its control unit 360 is one, and the control unit 360 is respectively connected to the power amplifier 310, the second switch unit 330, and the coupling switch 343, and is used to control the gain coefficient of the power amplifier 310, and also to control the selected conduction state of the first switch unit 110 and the coupling switch 343. Figure 8 When the RF PA Mid device 30 supports the control of receiving and transmitting RF signals in the N77 or N79 frequency band, a control unit 360 connected to the second low noise amplifier 350 may be further provided. The control unit 360 is used to adjust the gain coefficient of the second low noise amplifier 350 to adjust the insertion loss of the receiving link in the RF PA Mid device 30, thereby improving the sensitivity of its RF system.

[0095] With the development and progress of technology, 5G mobile communication technology has gradually begun to be applied to communication devices. 5G networks support beamforming technology, which can transmit in a directional manner to communication devices. In order for a base station to transmit in a directional manner, it must first detect the location of the communication device, the quality of the transmission path, etc., so that the base station's resources can be more accurately allocated to each communication device.

[0096] At present, communication equipment feedback channel information has two different modes: Precoding Matrix Indicator (PMI) and Channel Sounding Reference Signal (SRS). The signal transmission is respectively Fig.10a and 10bAs shown. From the standard definition, PMI is a function that all 5G communication devices must support, while SRS is an optional function. PMI is a pre-set mechanism used by the base station to estimate channel information and resource requirements through terminal measurements and various quantization algorithms, and report them to the base station; while SRS uses channel reciprocity to allow the terminal to directly report channel information to the base station. Obviously, the latter is more accurate.

[0097] The communication device sends SRS information, which is used by the base station to detect the terminal location and channel quality. Fig.11 The specific instructions are as follows:

[0098] First, 1T1R: Fixedly feeds information back to the base station through the first antenna Ant0, and does not support SRS round-robin transmission;

[0099] First, 1T4R: The first antenna Ant0 to the fourth antenna Ant3 transmit SRS information in turn, and only one antenna is selected for transmission each time. Currently, non-standalone networking (NSA) adopts this mode;

[0100] Third, 2T4R: the first antenna Ant0 to the fourth antenna Ant3 transmit SRS information in turn, and two antennas are selected to transmit simultaneously each time. Currently, this mode is adopted in standalone networking (SA).

[0101] In SRS mode, the more antennas that can participate in sending reference signals, the more accurate the channel estimation, and the higher the rate that can be obtained; when the number of antennas is the same, SA mode completes channel estimation faster than NSA mode, thereby improving the network channel estimation speed.

[0102] At present, all major operators have put forward the functional requirements of 5G NR supporting SRS. For example, China Mobile clearly stated in its "China Mobile 5G Terminal Product White Paper" that N41 / 79 must support SRS function (1T2R or 2T4R); China Unicom clearly required in its "China Unicom 5G Terminal White Paper" that N78 must support SRS1T4R and 2T4R antenna rotation; China Telecom proposed in its "China Telecom 5G All-Netcom Terminal Requirements White Paper" to support 1-port and 2-port SRS transmission, support antenna switching, and recommend support for 4-antenna rotation in the n78 frequency band, namely SRS1T4R and 2T4R.

[0103] like Fig.12aAs shown, in one embodiment, the antenna group 20 includes a first antenna Ant0, a second antenna Ant1, a third antenna Ant2 and a fourth antenna Ant3, and the number of RF L-DRX devices 10 is three, which are respectively recorded as a first RF L-DRX device 11, a second RF L-DRX device 12, and a third RF L-DRX device 13. Among them, the first RF L-DRX device 11, the second RF L-DRX device 12, and the third RF L-DRX device 13 are the same, and the first filtering unit 120 in each RF L-DRX device 10 is arranged at the front end of the first switch unit 110.

[0104] like Figure 12b As shown, in one embodiment, the first filtering units 120 in the first RF L-DRX device 11 , the second RF L-DRX device 12 , and the third RF L-DRX device 13 are all arranged at the rear end of the first switch unit 110 .

[0105] Among them, a first end of the multi-channel selection switch 40 is connected to the RF PA Mid device 30; a second end of the multi-channel selection switch 40 is connected to the second antenna Ant1, a second end of the multi-channel selection switch 40 is connected to the first antenna Ant0 via the round-robin port SRS of the first RF L-DRX device 11, a second end of the multi-channel selection switch 40 is connected to the third antenna Ant2 via the round-robin port SRS of the second RF L-DRX device 12, and a second end of the multi-channel selection switch 40 is connected to the fourth antenna Ant3 via the round-robin port SRS of the third RF L-DRX device 13 to support the SRS function of 1T4R.

[0106] In one embodiment, the multi-channel selection switch 40 is separately provided with the RF PA Mid device 30, and the multi-channel selection switch 40 can be a RF SP4T switch, wherein a first end (contact 1) of the RF SP4T switch is connected to the RF antenna port ANT of the RF PA Mid device 30, a second end (contact 2) of the RF SP4T switch is connected to the second antenna Ant1, a second end (contact 3) of the RF SP4T switch is connected to the first antenna Ant0 via the round-robin port SRS of the first RF L-DRX device 11, a second end (contact 4) of the RF SP4T switch is connected to the third antenna Ant2 via the round-robin port SRS of the second RF L-DRX device 12, and a second end (contact 5) of the RF SP4T switch is connected to the fourth antenna Ant3 via the round-robin port SRS of the third RF L-DRX device 13 to support the SRS function of 1T4R.

[0107] The radio frequency system based on this embodiment can support the SRS function of four antennas 1T4R. Figure 12b Take the N41 band as an example to analyze the working principle of SRS:

[0108] The RF signal is output from the RF antenna port ANT of the RF PA Mid device 30 via the RF transmitting port RFIN of the RF PA Mid device 30, the power amplifier 310, the second switch unit 330, the second filter unit 320, and the coupling unit 341, and is output from the RF antenna port ANT of the RF PA Mid device 30 via path 1 to the RF SP4T switch, the RF SP4T switch is switched to path 2, and is output from the second antenna Ant1ANT1; via path 1 to the RF SP4T switch, the RF SP4T switch is switched to path 3, and is switched to path 6 via the rotation port SRS of the first RF L-DRX device 11, and is output from the first antenna Ant0ANT1; via path 1 to the RF SP4T switch, the RF SP4T switch is switched to path 4, and is switched to path 7 via the rotation port SRS of the second RF L-DRX device 12, and is output from the third antenna Ant2ANT1; via path 1 to the RF SP4T switch, the RF SP4T switch is switched to path 5, and is switched to path 8 via the rotation port SRS of the third RF L-DRX device 13, and is output from the fourth antenna Ant3ANT1.

[0109] The SRS function transmitted by N77 and N79 is similar to that of N41 and will not be described in detail. The specific 1T4R SRS path configuration is shown in Table 1.

[0110] Table 1 1T4R SRS detailed path configuration table

[0111] N41 N77 N79 Channel0 Path 1 -> Path 2 Path 1 -> Path 2 Path 1 -> Path 2 Channel1 Path 1 -> Path 3 -> Path 6 Path 1 -> Path 3 -> Path 6 Path 1 -> Path 3 -> Path 6 Channel2 Path 1 -> Path 4 -> Path 7 Path 1 -> Path 4 -> Path 7 Path 1 -> Path 4 -> Path 7 Channel3 Path 1 -> Path 5 -> Path 8 Path 1 -> Path 5 -> Path 8 Path 1 -> Path 5 -> Path 8

[0112] In Table 1, Channel0, Channel1, Channel2, and Channel3 are transmission paths for antennas to transmit in turn.

[0113] like Fig.13a As shown, in one embodiment, the antenna group 20 includes a first antenna Ant0, a second antenna Ant1, a third antenna Ant2 and a fourth antenna Ant3; the number of RF PA Mid devices 30 is two, which are respectively recorded as a first RF PAMid device 31 and a second RF PA Mid device 32; the number of RF L-DRX devices 10 is three, which are respectively recorded as a first RF L-DRX device 11, a second RF L-DRX device 12, and a third RF L-DRX device 13.

[0114] Among them, the first RF L-DRX device 11 , the second RF L-DRX device 12 , and the third RF L-DRX device 13 are the same, and the first filtering unit 120 in each RF L-DRX device 10 is arranged at the front end of the first switching unit 110 .

[0115] like Fig.13bAs shown, in one embodiment, the first filtering units 120 in the first RF L-DRX device 11 , the second RF L-DRX device 12 , and the third RF L-DRX device 13 are all arranged at the rear end of the first switch unit 110 .

[0116] A first end of the multi-channel selection switch 40 is connected to the first RF PA Mid device 31, and a first end of the multi-channel selection switch 40 is connected to the second RF PA Mid device 32; a second end of the multi-channel selection switch 40 is connected to the first antenna Ant0, a second end of the multi-channel selection switch 40 is connected to the second antenna Ant1 via the round-robin port SRS of the first RF L-DRX device 11, a second end of the multi-channel selection switch 40 is connected to the third antenna Ant2 via the round-robin port SRS of the second RF L-DRX device 12, and a second end of the multi-channel selection switch 40 is connected to the fourth antenna Ant3 via the round-robin port SRS of the third RF L-DRX device 13 to support the SRS function of 2T4R.

[0117] In one embodiment, the multi-channel selection switch 40 is separately provided with the RF PA Mid device 30, and the multi-channel selection switch 40 can be a RF DP4T switch, wherein a first end (contact 1) of the RF SP4T switch is connected to the RF antenna port ANT of the first RF PA Mid device 31, and another first end (contact 2) of the RF DP4T switch is connected to the RF antenna port ANT of the second RF PAMid device 32; a second end (contact 3) of the RF SP4T switch is connected to the second antenna Ant1, another second end (contact 4) of the RF DP4T switch is connected to the first antenna Ant0 via the round-robin port SRS of the first RF L-DRX device 11, another second end (contact 5) of the RF DP4T switch is connected to the third antenna Ant2 via the round-robin port SRS of the second RF L-DRX device 12, and another second end (contact 6) of the RF DP4T switch is connected to the fourth antenna Ant3 via the round-robin port SRS of the third RF L-DRX device 13 to support the SRS function of 2T4R.

[0118] The radio frequency system based on this embodiment can support the SRS function of four-antenna 2T4R. The specific 2T4R SRS path configuration is shown in Table 2.

[0119] Table 2 2T4R SRS detailed path configuration table

[0120] N41 N77 N79 Channel0 Path 1 -> Path 3 Path 1 -> Path 3 Path 1 -> Path 3 Channel1 Path 1 -> Path 4 -> Path 7 Path 1 -> Path 4 -> Path 7 Path 1 -> Path 4 -> Path 7 Channel2 Path 2 -> Path 5 -> Path 8 Path 2 -> Path 5 -> Path 8 Path 2 -> Path 5 -> Path 8 Channel3 Path 2 -> Path 6 -> Path 9 Path 2 -> Path 6 -> Path 9 Path 2 -> Path 6 -> Path 9

[0121] In Table 2, Channel0, Channel1, Channel2, and Channel3 are transmission paths for the antennas to transmit in turn.

[0122] The RF system in the above embodiment can support the SRS function of 1T4R or the SRS function of 2T4R. At the same time, the RF system is based on the packaging setting of the RF L-DRX device 10, the RF PA Mid device 30 and a multi-channel selection switch, and there is no need to set up multiple independent cascade switches to realize the RF signal. The first antenna Ant0, the second antenna Ant1, the third antenna Ant2 and the fourth antenna Ant3 are transmitted in turn, which reduces the cost and reduces the area of ​​the substrate occupied by each device in the RF system.

[0123] like Fig.14 As shown, an embodiment of the present application further provides a communication device, on which the RF transceiver system 100 and the RF transceiver 90 in any of the above embodiments are provided. Exemplarily, the RF transceiver 90 may include a transmitter (such as a transmitter TX) and a receiver (such as a receiver RX), or may only include a receiver (for example, a receiver RX) or only include a transmitter (for example, a transmitter TX). The RF transceiver 90 may be used to implement frequency conversion processing between an intermediate frequency signal and a baseband signal, or / and, to implement frequency conversion processing between an intermediate frequency signal and a high frequency signal, and the like.

[0124] By setting the RF transceiver system 100 on the communication equipment, the integration of the RF transceiver system 100 is improved, and the area of ​​the substrate occupied by each device in the RF transceiver system 100 is reduced. At the same time, the power supply, logic control and PCB layout and wiring of the RF L-DRX device 10 can be simplified, saving costs.

[0125] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A radio frequency L-DRX device, characterized in that: The RF L-DRX device is configured with a receiving port and a transmitting port for connecting to a RF transceiver and an antenna port for connecting to an antenna, and the RF L-DRX device includes: A first switch unit is connected to the antenna port and the transmission port, respectively, and is used to selectively conduct the receiving path where the antenna port is located and the transmitting path where the transmission port is located; A first filtering unit, arranged in the transmitting path, for filtering the received radio frequency signal; A first low noise amplifier, wherein the first low noise amplifier is arranged in the receiving path and the output end of the first low noise amplifier is connected to the receiving port, and is used to amplify the filtered radio frequency signal to output it through the receiving port; wherein: The first switch unit includes a control end and a plurality of selection ends, one of the selection ends is connected to the round-emitting port, and one of the selection ends is connected to the first low noise amplifier; One end of the first filter unit is connected to the control end of the first switch unit, and the other end of the filter unit is connected to the antenna port, and is used to filter the radio frequency signals transmitted by the receiving path and the transmitting path.

2. The radio frequency L-DRX device according to claim 1, characterized in that: Also includes: A control unit is connected to the first low noise amplifier and the first switch unit respectively, and is used to adjust the gain coefficient of the first low noise amplifier to reduce the link loss of the receiving path, and is also used to control the first switch unit to select to conduct the receiving path or the transmitting path.

3. The radio frequency L-DRX device according to claim 1, characterized in that: The first filtering unit includes a bandpass filter or a low-pass filter.

4. The radio frequency L-DRX device according to claim 1, characterized in that: The first switch unit is a radio frequency SPDT switch.

5. The radio frequency L-DRX device according to claim 1, characterized in that: The radio frequency signal is a 5G signal.

6. A radio frequency transceiver system, characterized in that: include: An antenna group, comprising at least a first antenna and a second antenna, for transmitting and receiving radio frequency signals; The RF L-DRX device according to any one of claims 1 to 5, wherein the antenna port of the RF L-DRX device is connected to the first antenna; A radio frequency PA Mid device, used to support amplification, transmission and reception control of the radio frequency signal; A multi-channel selection switch includes a first end and multiple second ends, wherein the first end is connected to the RF PA Mid device, one second end is connected to the second antenna, and one second end is connected to the transmission port of the RF L-DRX device, and is used to selectively turn on the transmission paths of the first antenna and the second antenna to support the SRS function.

7. The radio frequency transceiver system according to claim 6, characterized in that: The RF PA Mid device is configured with a RF transmitting port, a RF receiving port and a RF antenna port, and the RF PA Mid device includes: A power amplifier, the input end of which is connected to the RF transmitting port, for receiving the RF signal transmitted by the RF transceiver and performing power amplification processing on the RF signal, A second filtering unit, connected to the RF antenna port, configured to filter the received RF signal; The second switch unit is connected to the output end of the power amplifier, the RF receiving port, and the filter unit respectively, and is used for selectively conducting the receiving path where the RF receiving port is located and the transmitting path where the RF transmitting port is located.

8. The radio frequency transceiver system according to claim 7, characterized in that: The radio frequency PA Mid device is configured with a coupled output port, and the radio frequency PA Mid device further comprises: A coupling unit, comprising an input end, an output end, a first coupling end and a second coupling end, wherein the input end of the coupling unit is connected to the filtering unit, and the output end of the coupling unit is connected to the RF antenna port, for coupling the RF signal in the transmission path; The coupling switch is connected to the first coupling end, the second coupling end and the coupling output port respectively, and is used to select and conduct the coupling paths between the first coupling end, the second coupling end and the coupling output port respectively.

9. The radio frequency transceiver system according to claim 7, characterized in that: The radio frequency PA Mid device also includes: A second low noise amplifier, wherein the input end of the second low noise amplifier is connected to the second switch unit, and the output end of the second low noise amplifier is connected to the RF receiving port, is used to amplify the RF signal in the receiving path.

10. The radio frequency transceiver system according to claim 6, characterized in that: The multi-channel selection switch is integrated in the RF PA Mid device, wherein the integrated RF PA Mid device is configured with multiple RF antenna ports, and the second ends of the multi-channel selection switch are connected to the RF antenna ports in a one-to-one correspondence.

11. The radio frequency transceiver system according to claim 6, characterized in that: The antenna group further includes a third antenna and a fourth antenna. The number of the RF L-DRX devices is three, which are respectively recorded as a first RF L-DRX device, a second RF L-DRX device, and a third RF L-DRX device; wherein, The first end of the multi-channel selection switch is connected to the RF PA Mid device; A second end of the multi-channel selection switch is connected to the second antenna, a second end of the multi-channel selection switch is connected to the first antenna via the transmission port of the first RF L-DRX device, a second end of the multi-channel selection switch is connected to the third antenna via the transmission port of the second RF L-DRX device, and a second end of the multi-channel selection switch is connected to the fourth antenna via the transmission port of the third RF L-DRX device to support the SRS function of 1T4R.

12. The radio frequency transceiver system according to claim 11, characterized in that: The number of the radio frequency PA Mid devices is two, which are respectively recorded as the first radio frequency PA Mid device and the second radio frequency PA Mid device; wherein, A first end of the multi-channel selection switch is connected to the first RF PA Mid device, and a first end of the multi-channel selection switch is connected to the second RF PA Mid device; A second end of the multi-channel selection switch is connected to the second antenna, a second end of the multi-channel selection switch is connected to the first antenna via the transmission port of the first RF L-DRX device, a second end of the multi-channel selection switch is connected to the third antenna via the transmission port of the second RF L-DRX device, and a second end of the multi-channel selection switch is connected to the fourth antenna via the transmission port of the third RF L-DRX device to support the SRS function of 2T4R.

13. The radio frequency transceiver system according to claim 11 or 12, characterized in that: The multi-channel selection switch is a radio frequency DP4T switch.

14. The radio frequency transceiver system according to claim 7, characterized in that: The second filtering unit includes a low-pass filter.

15. The radio frequency transceiver system according to claim 7, characterized in that: The second switch unit is a radio frequency SPDT switch.

16. A communication device comprising: RF transceiver, and A radio frequency transceiver system as described in any one of claims 6 to 15 connected to the radio frequency transceiver.

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