RF PA Mid device, RF system and communication device

Abstract

The present application provides a radio frequency PA Mid device, a radio frequency system and a communication device. Among them, for the radio frequency PA Mid device, the first transceiver circuit is configured to receive a first radio frequency signal through a first transmission port and perform amplification and filtering processing on the received first radio frequency signal; the second transceiver circuit is configured to receive a second radio frequency signal through a second transmission port and perform amplification and filtering processing on the received second radio frequency signal; the multi-channel selection switch is configured to select and conduct the transmission paths between the first transceiver circuit and the second transceiver circuit and any antenna radiation port respectively to support the function of transmitting dual-band detection reference signals among multiple antennas through multiple antenna radiation ports, which can reduce the insertion loss of the transmission path, reduce the occupied space of the radio frequency PA Mid device, reduce the cost, and improve the communication performance of the radio frequency system.

Description

Technical Field

[0001] This application relates to the field of radio frequency technology, and particularly to a radio frequency PA Mid device, a radio frequency system, and a communication device. Background Art

[0002] With the development and progress of technology, 5G mobile communication technology has gradually started 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 provided in the transmission path of a frequency system to support the rotation of radio frequency signals among multiple antennas, which has high cost and large occupied substrate area. Summary of the Invention

[0003] Embodiments of this application provide a radio frequency PA Mid device, a radio frequency system, and a communication device, which can save occupied space, improve integration, and reduce costs.

[0004] A radio frequency PA Mid device is configured with a first transmission port and a second transmission port for connecting to a radio frequency transceiver, and multiple antenna radiation ports for connecting to antennas. The radio frequency PA Mid device includes:

[0005] A first transceiver circuit, connected to the first transmission port, for receiving a first radio frequency signal through the first transmission port and performing amplification and filtering processing on the received first radio frequency signal;

[0006] A second transceiver circuit, connected to the second transmission port, for receiving a second radio frequency signal through the second transmission port and performing amplification and filtering processing on the received second radio frequency signal;

[0007] A multi-channel selection switch includes at least two first ends and multiple second ends. One of the first ends is connected to the first transceiver circuit, and the other first end is connected to the second transceiver circuit. The multiple second ends are respectively connected to the multiple antenna radiation ports in a one-to-one correspondence. The multi-channel selection switch is used to select and conduct the transmission paths between the first transceiver circuit and the second transceiver circuit and any one of the antenna radiation ports, so as to support the function of the dual-band detection reference signal to be radiated among multiple antennas through the multiple antenna radiation ports.

[0008] A radio frequency system includes:

[0009] The radio frequency PA Mid device as described above;

[0010] An antenna group, at least including:

[0011] A first antenna, connected to one of the second ends of the multi-channel selection switch;

[0012] A second antenna, connected to another second port of the multi-channel selection switch.

[0013] A communication device, comprising:

[0014] A radio frequency transceiver,

[0015] The radio frequency system as described above, the radio frequency system being connected to the radio frequency transceiver.

[0016] The above-mentioned radio frequency PA Mid device is configured with multiple antenna radiation ports for connecting multiple antennas in an antenna group, and further includes a first transceiver circuit, a second transceiver circuit and a multi-channel selection switch, which can realize the transmission control of dual-band radio frequency signals (the first radio frequency signal and the second radio frequency signal). At the same time, based on the multi-channel selection switch, the transmission paths between the first transceiver circuit and the second transceiver circuit and any antenna radiation port can be selectively turned on to support the function of the dual-band detection reference signal being radiated among multiple antennas through multiple antenna radiation ports. Compared with the traditional technology, the number of switches on the transmission path is reduced, the insertion loss of the transmission path can be reduced, at the same time, the occupied space of the radio frequency PA Mid device is reduced, the cost is reduced, and the communication performance of the radio frequency system is also improved. Brief Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 One of the schematic diagrams of the radio frequency system in an embodiment;

[0019] Figure 2 One of the schematic diagrams of the radio frequency PA Mid device in an embodiment;

[0020] Figure 3 Another schematic diagram of the radio frequency PA Mid device in an embodiment;

[0021] Figure 4 Another schematic diagram of the radio frequency PA Mid device in an embodiment;

[0022] Figure 5 Another schematic diagram of the radio frequency PA Mid device in an embodiment;

[0023] Figure 6 Another schematic diagram of the radio frequency PA Mid device in an embodiment;

[0024] Figure 7 Sixth schematic diagram of the RF PA Mid device in one embodiment;

[0025] Figure 8 Seventh schematic diagram of the RF PA Mid device in one embodiment;

[0026] Figure 9a For Figure 7 Schematic diagram of the pin distribution of the RF PA Mid device in

[0027] Figure 9b For Figure 9a Schematic diagram of the package structure layout of the RF PA Mid device in

[0028] Figure 10a For Figure 8 Schematic diagram of the pin distribution of the RF PA Mid device in

[0029] Figure 10b For Figure 10a Schematic diagram of the package structure layout of the RF PA Mid device in

[0030] Figure 11 Second schematic diagram of the structure of the RF system in one embodiment;

[0031] Figure 12a First schematic diagram of the transmission application scenario of the communication device feedback channel information in one embodiment;

[0032] Figure 12b Second schematic diagram of the transmission application scenario of the communication device feedback channel information in one embodiment;

[0033] Figure 13 Schematic diagram of the mode structure of the SRS antenna transmitting in turn in one embodiment;

[0034] Figure 14 Schematic diagram of the L-DRX device in one embodiment;

[0035] Figure 15a Third schematic diagram of the RF transceiver system in one embodiment;

[0036] Figure 15b Fourth schematic diagram of the RF transceiver system in one embodiment;

[0037] Figure 16a Fifth schematic diagram of the RF transceiver system in one embodiment;

[0038] Figure 16b Sixth schematic diagram of the RF transceiver system in one embodiment;

[0039] Figure 17 Schematic diagram of the structure of the communication device in one embodiment. Detailed implementation manners

[0040] To facilitate the understanding of the present application, in order to make the above-mentioned objects, features and advantages of the present application more obvious and understandable, the following will describe the detailed implementation manners of the present application in conjunction with the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present application, and the preferred implementation manners of the present application are shown in the accompanying drawings. However, the present application can be implemented in many different forms and is not limited to the implementation manners described herein. On the contrary, these implementation manners are provided to make the disclosure of the present application more thorough and comprehensive. 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 departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0041] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined. In the description of the present application, "several" means at least one, such as one, two, etc., unless otherwise specifically defined.

[0042] The radio frequency system involved in the embodiments of the present application can be applied to communication devices with wireless communication functions. The communication devices can be handheld devices, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to a wireless modem, as well as various forms of user equipment (User Equipment, UE) (such as mobile phones), mobile stations (Mobile Station, MS), and so on. For the sake of convenience of description, the devices mentioned above are collectively referred to as communication devices. The network devices can include base stations, access points, etc.

[0043] As Figure 1 shown, the embodiments of the present application provide a radio frequency system. In one of the embodiments, the radio frequency system includes a radio frequency PA Mid (Power Amplifier Modules including Duplexers) device 10 and an antenna group 20. Among them, the antenna group 20 may include multiple antennas Ant that support the transceiver of multi-band radio frequency signals.

[0044] In this radio frequency PA Mid device 10, multiple antenna radiation ports SRS for connecting multiple antennas Ant in the antenna group 20 are configured. It also includes a first transceiver circuit 110, a second transceiver circuit 120, and a multi-channel selector switch 130, which can achieve the transmission control of dual-band radio frequency signals (the first radio frequency signal and the second radio frequency signal). At the same time, based on the multi-channel selector switch 130, the transmission paths between the first transceiver circuit 110 and the second transceiver circuit 120 and any antenna radiation port SRS can be selectively turned on to support the function of the dual-band sounding reference signal being radiated among multiple antennas Ant through multiple antenna radiation ports SRS. In the above radio frequency system, only one multi-channel selector switch 130 is provided inside the radio frequency PA Mid device 10, and the dual-band sounding reference signal can be radiated among multiple antennas Ant. Compared with the traditional technology, the number of switches on the transmission path is reduced, the insertion loss of the transmission path can be reduced, and at the same time, the occupied space of the radio frequency PA Mid device 10 is reduced, the cost is reduced, and the communication performance of the radio frequency system is improved.

[0045] In one embodiment, the radio frequency PA Mid device 10 is configured with a first transmission port RFIN1, a second transmission port RFIN2 for connecting to a radio frequency transceiver, and multiple antenna radiation ports SRS for connecting to antennas Ant. The antenna radiation port SRS can be understood as each radio frequency pin configured in the radio frequency PA Mid device 10 and connected to each antenna Ant in the antenna group 20. Among them, the number of antenna radiation ports SRS is equal to the number of antennas Ant, and one antenna radiation port SRS corresponds to one antenna Ant for connection. The first transmission port RFIN1 and the second transmission port RFIN2 can be understood as radio frequency terminals configured in the radio frequency PA Mid device 10 for connecting to a radio frequency transceiver.

[0046] The radio frequency PA Mid device 10 includes a first transceiver circuit 110 and a second transceiver circuit 120. Among them, the first transceiver circuit 110 is connected to the first transmission port RFIN1 and is used to receive the first radio frequency signal through the first transmission port RFIN1 and perform amplification and filtering processing on the received first radio frequency signal; the second transceiver circuit 120 is connected to the second transmission port RFIN2 and is used to receive the second radio frequency signal through the second transmission port RFIN2 and perform amplification and filtering processing on the received second radio frequency signal.

[0047] It should be noted that the structures of the first transceiver circuit 110 and the second transceiver circuit 120 are the same. At the same time, both the first transceiver circuit 110 and the second transceiver circuit 120 can achieve the transmission control or transceiver (transmission and reception) control of the first radio frequency signal and the second radio frequency signal.

[0048] The multi-channel selection switch 130 includes at least two first ends and multiple second ends. Among them, the two first ends can be respectively denoted as P1 and P2, and the multiple second ends can be respectively denoted as T1, T2, …, Tm, where m is the number of second ends. Among them, one first end P1 is connected to the first transceiver circuit 110, and the other first end P2 is connected to the second transceiver circuit 120. The multiple second ends are respectively and correspondingly connected to the antenna radiation ports SRS. That is, one second end of the multi-channel selection switch 130 is correspondingly connected to one antenna radiation port SRS. Exemplarily, when the number of antenna radiation ports SRS is two, and they are respectively SRS1 and SRS2, one second end T1 of the multi-channel selection switch 130 is correspondingly connected to the antenna radiation port SRS1, and the other second end T2 of the multi-channel selection switch 130 is correspondingly connected to the antenna radiation port SRS2.

[0049] The multi-channel selection switch 130 is used to selectively conduct the transmission paths between the first transceiver circuit 110 and the second transceiver circuit 120 and any antenna radiation port SRS, so as to support the function of the sounding reference signals of dual bands (the first radio frequency signal and the second radio frequency signal) to be radiated among multiple antennas Ant through multiple antenna radiation ports SRS.

[0050] In one embodiment, both the first radio frequency signal and the second radio frequency signal can be 5G NR signals, but their operating frequency bands are different. Exemplarily, the first radio frequency signal can be a 5G signal in the N77 band and / or the N78 band, and the second radio frequency signal can be a 5G signal in the N79 band. Correspondingly, the first radio frequency signal can be a 5G signal in the N79 band, and the second radio frequency signal can be a 5G signal in the N77 band and / or the N78 band. Specifically, the operating frequency band of N77 is 3.3 GHz - 4.2 GHz, the operating frequency band of N78 is 3.3 GHz - 3.8 GHz, and the operating frequency band of N79 is 4.4 GHz - 5.0 GHz.

[0051] The above radio frequency PA Mid device 10 is configured with an antenna radiation port SRS, and further includes a first transceiver circuit 110 and a second transceiver and multi-channel selection switch 130, which can implement the transmission control of dual-band radio frequency signals (the first radio frequency signal and the second radio frequency signal). At the same time, based on the multi-channel selection switch 130, the transmission paths between the first transceiver circuit 110 and the second transceiver circuit 120 and any antenna radiation port SRS can be selectively turned on to support the function of the dual-band detection reference signal being radiated among multiple antennas Ant through multiple antenna radiation ports SRS. Compared with the traditional radio frequency PA Mid device 10, the number of switches on the transmission path is reduced, the insertion loss of the transmission path can be reduced, and at the same time, the associated modules for power supply and control of multiple switches in the traditional radio frequency PA Mid device 10 can be reduced, reducing the occupied space and cost of the radio frequency PA Mid device 10, and also improving the communication performance of the radio frequency system.

[0052] As Figure 2 shown, in one of the embodiments, the first transceiver circuit 110 includes a first power amplifier 111 and a first filter 112. Among them, the input end of the first power amplifier 111 is connected to the first transmission port RFIN1, and is used for amplifying the first radio frequency signal; the first filter 112 is respectively connected to the output end of the first power amplifier 111 and the first end of the multi-channel selection switch 130, and is used for filtering the received first radio frequency signal. That is, the first transceiver circuit 110 can receive the first radio frequency signal output by the radio frequency transceiver through the first transmission port RFIN1, and after amplifying and filtering the first radio frequency signal, it is output through any antenna radio frequency port selected by the multi-channel selection switch 130 to control the radiation of the detection reference signal of the first radio frequency signal among multiple antennas Ant through any antenna radio frequency port.

[0053] Correspondingly, the second transceiver circuit 120 includes a second power amplifier 121 and a second filter 122. Among them, the input end of the second power amplifier 121 is connected to the second transmission port RFIN2, and is used for amplifying the second radio frequency signal; the second filter 122 is respectively connected to the output end of the second power amplifier 121 and the first end of the multi-channel selection switch 130, and is used for filtering the received second radio frequency signal. That is, the second transceiver circuit 120 can receive the second radio frequency signal output by the radio frequency transceiver through the second transmission port RFIN2, and after amplifying and filtering the second radio frequency signal, it is output through any antenna radio frequency port selected by the multi-channel selection switch 130 to control the radiation of the detection reference signal of the second radio frequency signal among multiple antennas Ant through any antenna radio frequency port.

[0054] Exemplarily, the first radio frequency signal is a signal in the N77 frequency band, and the second radio frequency signal is a signal in the N79 frequency band for illustration. Among them, the first power amplifier 111 and the first filter 112 can both support the processing of 5G signals in the N77 frequency band, and the second power amplifier 121 and the second filter 122 can both support the processing of 5G signals in the N79 frequency band. Among them, the first filter 112 only allows radio frequency signals in the N77 frequency band to pass through, and can also filter out stray waves other than the signals in the N77 frequency band. The second filter 122 only allows 5G signals in the N79 frequency band to pass through, and can also filter out stray waves other than the 5G signals in the N79 frequency band.

[0055] In one embodiment, the first filter 112 and the second filter 122 can be band-pass filters. The first filter 112 can also be a low-pass filter.

[0056] It should be noted that in the embodiments of the present application, the types of the first filter 112 and the second filter 122 are not further limited.

[0057] As Figure 3 shown, in one embodiment, based on the radio frequency PA Mid device 10 shown in Figure 2 shown, the radio frequency PA Mid device 10 is further configured with a first receiving port RX1 and a second receiving port RX2 for connecting to a radio frequency transceiver. Among them, the first receiving port RX1 and the second receiving port RX2 can be understood as radio frequency terminals configured on the radio frequency PA Mid device 10 for connecting to the radio frequency transceiver.

[0058] Among them, the first transceiver circuit 110 further includes a first low-noise amplifier 113 and a first switch unit 114. Among them, the output end of the first low-noise amplifier 113 is connected to the first receiving port RX1, and is used for amplifying the received first radio frequency signal; the first switch unit 114 is respectively connected to the output end of the first power amplifier 111 and the input end of the first low-noise amplifier 113, and is used for selectively conducting the receiving path where the first receiving port RX1 is located or the transmitting path where the first transmitting port RFIN1 is located to realize the transceiver control of the first radio frequency signal. Specifically, the first switch unit 114 is used for switching control of the transceiver working mode of the first radio frequency signal in the TDD mode. That is, when the first switch unit 114 selects to conduct and connect with the first power amplifier 111, the transmitting path where the first transmitting port RFIN1 is located can be conducted to realize the transmitting control of the first radio frequency signal, and when the first switch unit 114 selects to conduct and connect with the first low-noise amplifier 113, the receiving path where the first receiving port RX1 is located can be conducted to realize the receiving control of the first radio frequency signal.

[0059] The second transceiver circuit 120 further includes a second low-noise amplifier 123 and a second switch unit 124. Among them, the output end of the second low-noise amplifier 123 is connected to the second receiving port RX2, and is used for amplifying the received second radio frequency signal. The second switch unit 124 is respectively connected to the output end of the second power amplifier 121 and the input end of the second low-noise amplifier 123, and is used for selecting and conducting the receiving path where the second receiving port RX2 is located or the transmitting path where the second transmitting port RFIN2 is located to implement the transceiver control of the second radio frequency signal. Specifically, the second switch unit 124 is used for switching and controlling the transceiver working mode of the second radio frequency signal in the TDD system. That is, when the second switch unit 124 selects to be conductively connected to the second power amplifier 121, the transmitting path where the second transmitting port RFIN2 is located can be conducted to implement the transmitting control of the second radio frequency signal. When the second switch unit 124 selects to be conductively connected to the second low-noise amplifier 12, the receiving path where the second receiving port RX2 is located can be conducted to implement the receiving control of the second radio frequency signal.

[0060] [[ID=,3]]In one embodiment, the first switch unit 114 and the second switch unit 124 can be single-pole double-throw (SPDT) switches, and can also be electronic switch tubes, Mobile Industry Processor Interface (MIPI) interfaces, and / or General-purpose input / output (GPIO) interfaces, etc. When the first switch unit 114 and the second switch unit 124 are MIPI interfaces or GPIO interfaces, the on or off states of the first switch unit 114 and the second switch unit 124 can be controlled through the MIPI control unit and / or the GPIO control unit. It should be noted that in the embodiments of the present application, the specific forms of the first switch unit 114 and the second switch unit 124 are not further limited.

[0061] In one embodiment, when the RF PA Mid device 10 includes a first switch unit 114 and a second switch unit 124, and the number of antenna radiation ports SRS is four (which can be denoted as SRS1, SRS2, SRS3, and SRS4 respectively), the multi-channel selection switch 130 includes two first ends (which can be denoted as P1 and P2 respectively) and four second ends (which can be denoted as T1, T2, T3, and T4 respectively). Exemplarily, the multi-channel selection switch 130 can be an RF DP4T switch. Among them, one first end P1 of the RF DP4T switch is connected to the first filter 112, the other first end P2 is connected to the second filter 122, one second end T1 is connected to the antenna radiation port SRS1, another second end T2 is connected to the antenna radiation port SRS2, another second end T3 is connected to the antenna radiation port SRS3, and another second end T4 is connected to the antenna radiation port SRS4. That is, when one first end P1 of the multi-channel selection switch 130 is connected to the first filter 112, through the switching control of the RF DP4T switch, the first RF signal can be output from any one of the antenna radiation ports SRS1 to SRS4. When the other first end P2 of the multi-channel selection switch 130 is connected to the second filter 122, through the switching control of the RF DP4T switch, the first RF signal can be output from any one of the antenna radiation ports SRS1 to SRS4.

[0062] Take Figure 3 the RF PA Mid device 10 shown as an example to illustrate the working mechanism of the transmission and reception control of the first RF signal (5G signal in the N77 band):

[0063] The first RF signal enters from the first transmission port RFIN1, is transmitted to the first switch unit 114 through the first power amplifier 111, is switched to the first filter 112 by the first switch unit 114, and then reaches the first end of the multi-channel selection switch 130. Through the switching of the multi-channel selection switch 130, the first RF signal can be output from any one of the four antenna radiation ports (among SRS1 to SRS4) to support the SRS transmission function of the first RF signal. Correspondingly, the first RF signal received by the antenna Ant can be input through any one of the antenna radiation ports (among SRS1 to SRS4), and then switched to the receiving channel in the first transceiver circuit 110 by the multi-channel selection switch 130, passes through the first filter 112 to the first switch unit 114, and then is switched to the first low-noise amplifier 113 by the first switch unit 114. The first low-noise amplifier 113 outputs to the RF transceiver through the first receiving port RX1.

[0064] In this embodiment, the first transceiver circuit 110 can implement the transceiver control of the first radio frequency signal, and at the same time can also support the round-robin transmission of the first radio frequency signal among multiple antennas Ant to implement the SRS function; correspondingly, the second transceiver circuit 120 can implement the transceiver control of the second radio frequency signal, and at the same time can also support the round-robin transmission of the second radio frequency signal among multiple antennas Ant to implement the SRS function. That is, the radio frequency PA Mid device 10 can support the transceiver control of N77 and N79 dual-band signals, and can also support the function of round-robin transmission of dual-band sounding reference signals among multiple antennas through multiple antenna round-robin ports SRS. Compared with the traditional radio frequency PA Mid device 10, the number of switches in the transmission path is reduced (for example, at least two radio frequency switch devices need to be set in the traditional radio frequency PA Mid device 10, such as cascaded DP3T switches and 3P4T switches), which can reduce the insertion loss of the transmission path, and at the same time reduce the occupied space of the radio frequency PA Mid device 10, reduce the cost, and improve the communication performance of the radio frequency system.

[0065] As Figure 4 shown, in one embodiment, based on the radio frequency PA Mid device 10 as Figure 2 shown, the radio frequency PA Mid device 10 is further configured with a first receiving port RX1 and a second receiving port RX2 for connecting to a radio frequency transceiver. The first transceiver circuit 110 further includes a third low-noise amplifier 115 and a third filter 116. Among them, the output end of the third low-noise amplifier 115 is connected to the first receiving port RX1, and is used for amplifying the received first radio frequency signal; the third filter 116 is respectively connected to the input end of the third low-noise amplifier 115 and the first end of the multi-channel selection switch 130, and is used for filtering the received first radio frequency signal. That is, the reception control of the first radio frequency signal is implemented based on the third low-noise amplifier 115 and the third filter 116. The second transceiver circuit 120 further includes a fourth low-noise amplifier 125 and a fourth filter 126. Among them, the output end of the fourth low-noise amplifier 125 is connected to the first receiving port RX1, and is used for amplifying the received second radio frequency signal; the fourth filter 126 is respectively connected to the input end of the fourth low-noise amplifier 125 and the first end of the multi-channel selection switch 130, and is used for filtering the received second radio frequency signal. That is, the reception control of the second radio frequency signal can be implemented based on the fourth low-noise amplifier 125 and the fourth filter 126.

[0066] In one embodiment, when the RF PA Mid device 10 includes a third filter 116 and a fourth filter 126, and the number of antenna radiation ports SRS is four (which can be denoted as SRS1, SRS2, SRS3, and SRS4 respectively), the multi-channel selection switch 130 includes four first ends (which can be denoted as P1, P2, P3, and P4 respectively) and four second ends (which can be denoted as T1, T2, T3, and T4 respectively). In one embodiment, the multi-channel selection switch 130 is a RF 4P4T switch. That is, any one of the first ends P1, P2, P3, or P4 of the RF 4P4T switch can be connected to the four second ends (T1, T2, T3, and T4). Among them, one first end P1 of the RF 4P4T switch is connected to the first filter 112, another first end P2 is connected to the second filter 122, another first end P3 is connected to the third filter 116, and another first end P4 is connected to the fourth filter 126; one second end T1 is connected to the antenna radiation port SRS1, another second end T2 is connected to the antenna radiation port SRS2, another second end T3 is connected to the antenna radiation port SRS3, and another second end T4 is connected to the antenna radiation port SRS4. That is, when the first end P1 of the multi-channel selection switch 130 is connected to the first filter 112, through the switching control of the RF DP4T switch, the first RF signal can be output from any one of the antenna radiation ports SRS1 to SRS4. When the first end P2 of the multi-channel selection switch 130 is connected to the second filter 122, through the switching control of the RF DP4T switch, the first RF signal can be output from any one of the antenna radiation ports SRS1 to SRS4.

[0067] Take Figure 4 the shown RF PA Mid device 10 as an example to illustrate the working mechanism of the transmission and reception control of the first RF signal (5G signal in the N77 frequency band):

[0068] The first RF signal enters from the first transmission port RFIN1, passes through the first power amplifier 111 and the first filter 112, and then reaches the first end of the multi-channel selection switch 130. Through the switching of the multi-channel selection switch 130, the first RF signal can be output from any one of the four antenna radiation ports (among SRS1 to SRS4) to support the SRS transmission function of the first RF signal. Correspondingly, the first RF signal received by the antenna Ant can be input through any one of the antenna radiation ports (among SRS1 to SRS4), and then switched by the multi-channel selection switch 130 to the receiving channel in the first transceiver circuit 110, and output to the RF transceiver through the third filter 116, the first low-noise amplifier 113, and the first receiving port RX1.

[0069] Such as Figure 3In the RF PA Mid device 10 shown, a multi-channel selection switch 130 (e.g., RF DP4T switch), a first switch unit 114 (e.g., SPDT switch), and a second switch unit 124 (e.g., SPDT switch) are provided on the transceiver channel inside the device, for a total of three switching switches. Taking the commonly used RF DP4T switch QM11024 as an example, the insertion loss of its multi-channel selection switch 130 is shown in Table 1, and the RF of each frequency band in its RF PA Mid device 10 is shown in Table 2.

[0070] Table 1 Insertion loss values of the multi-channel selection switch 130 QM11024

[0071] Frequency Band (GHz) N77 N79 Insertion Loss (dB) 0.7 0.9

[0072] Table 2 Link RF line loss values

[0073] Frequency Band (GHz) N77 N79 Insertion Loss (dB) 2.9 2.8

[0074] As Figure 4 In the RF PA Mid device 10 shown, the first switch unit 114 and the second switch unit 124 for transceiver channel switching are omitted, which can reduce the link loss of the transceiver channel of the RF PA Mid device 10. Exemplarily, taking the first switch unit 114 and the second switch unit 124 as SPDT switches (e.g., RF1630) as an example, the insertion loss of its first switch unit 114 or second switch unit 124 is shown in Table 3.

[0075] Table 3 Insertion loss values of the first switch unit 114 or the second switch unit 124

[0076] Frequency Band (GHz) N77 N79 Insertion Loss (dB) 0.65 0.90

[0077] Table 4 SRS output power of the antenna radiation port for N77 and N79 channels

[0078] Frequency Band (GHz) N77 N79 Antenna Ant Port Power (dB) 25.55 25.45

[0079] Taking the output power of the first transmit port RFIN1 as 28.5 dBm as an example for illustration. The output power of the antenna radiation port SRS is 28.5 - 2.9 - 0.7 + 0.65 = 25.55 dBm, and the SRS output power of the antenna radiation port for N77 and N79 is shown in Table 4. It can be seen from Table 4 that the SRS output power of the antenna radiation port for the N77 channel is 25.55 dBm, which meets the design requirements of the R & D.

[0080] As Figure 5As shown, in one embodiment, the RF PA Mid device 10 is configured with a coupled output port CPLOUT. The RF PA Mid device 10 further includes a first coupling unit 141, a second coupling unit 142, and a coupling switch unit 143.

[0081] The first coupling unit 141 is disposed in the transmission path of the first transceiver circuit 110 and is configured to couple a first RF signal to output a first coupled signal. The first coupled signal includes a first forward coupled signal and a first reverse coupled signal. The second coupling unit 142 is disposed in the transmission path of the second transceiver circuit 120 and is configured to couple a second RF signal to output a second coupled signal. The second coupled signal includes a second forward coupled signal and a second reverse coupled signal.

[0082] The first coupling unit 141 includes an input end a, an output end b, a first coupling end c, and a second coupling end d. Meanwhile, the first coupling unit 141 further includes a main line extending between the input end a and the output end b, and a secondary line extending between the first coupling end c and the second coupling end d. The input end a of the first coupling unit 141 is connected to the output end of the first power amplifier 111221. The output end b of the first coupling unit 141 is connected to the first filter 112. The first coupling end c is configured to couple the RF signal received at the input end a and output a first forward coupled signal. The second coupling end d is configured to couple the reflected signal of the first RF signal and output a first reverse coupled signal. Based on the first forward coupled signal output from the first coupling end c, the forward power information of the first RF signal can be detected, and this detection mode is defined as the forward power detection mode. Based on the first reverse coupled signal output from the second coupling end d, the reverse power information of the first RF signal can be correspondingly detected, and this detection mode is defined as the reverse power detection mode.

[0083] Correspondingly, based on the first coupling end and the second coupling end of the second coupling unit 142, the forward power detection and reverse power detection of the second RF signal can also be achieved. The second coupling unit 142 has the same structure and working principle as the first coupling unit 141. Herein, the structure and working principle of the second coupling unit 142 will not be described in detail.

[0084] The coupling switch unit 143 is respectively connected to the first coupling unit 141 and the second coupling unit 142 and is configured to select to output the first forward coupled signal, the first reverse coupled signal, the second forward coupled signal, or the second reverse coupled signal through the coupled output port CPLOUT. That is, it is configured to select and switch between the first coupling unit 141 and the second coupling unit 142 to output the first coupled signal or the second coupled signal, thereby achieving the detection of the power information of the first coupled signal and the second coupled signal. The power information includes forward power and reverse power.

[0085] In one embodiment, the coupling switch unit 143 includes four first contacts (1, 2, 3, 4) and two second contacts (5, 6). Among them, a first contact (1) is connected to the second coupling end of the first coupling unit 141, a first contact (2) is connected to the first coupling end of the first coupling unit 141, a first contact (4) is connected to the first coupling end of the second coupling unit 142, and a first contact (3) is connected to the second coupling end of the second coupling unit 142; a second contact (6) is connected to the coupling output port CPLOUT, and a second contact (5) is grounded.

[0086] Exemplarily, taking the power information of the first radio frequency signal and the coupling switch unit 143 as a radio frequency DP4T switch as an example for illustration.

[0087] When it is necessary to collect the first reverse coupling signal of the first coupling unit 141, the contact (5) of the radio frequency DP4T switch is connected to the contact (1), grounding the leaked first forward coupling signal through the load to avoid interference to the second coupling end (reverse power output port), and the contact (6) of the radio frequency DP4T switch is connected to the contact (2), exporting the first reverse coupling signal to the coupling output port CPLOUT. When sampling the first forward coupling signal of the first coupling unit 141, the contact (5) of the radio frequency DP4T switch is connected to the contact (2), and the contact (6) is connected to the contact (1), grounding the leaked first reverse coupling signal through the load to avoid interference to the second coupling end (reverse power output port).

[0088] It should be noted that the control process of collecting the power information of the second radio frequency signal is similar to the control process of collecting the power information of the first radio frequency signal, and will not be elaborated here.

[0089] In the embodiment of the present application, only one coupling switch unit 143 (such as a radio frequency DP4T switch) is provided, which can realize the switching between the first coupling unit 141 and the second coupling unit 142, reduce the occupied package area, and also reduce the cost. Since the first coupling unit 141 and the second coupling unit 142 do not work simultaneously, only one coupling output port CPLOUT is provided to meet the requirements; reducing the complexity of the radio frequency traces inside the device, and at the same time improving the isolation performance of each trace inside.

[0090] In one embodiment, the radio frequency PA Mid device 10 further includes a resistor R, and a second contact 5 is grounded through the resistor R. Specifically, the resistance value of the resistor R can be set to 50 ohms, grounding the leaked forward coupling signal or reverse coupling signal, and solving the interference of the forward coupling signal to the reverse output port when the reverse coupling signal of the first coupling unit 141 or the second coupling unit 142 is output.

[0091] As Figure 6 shown, in one embodiment, based on the RF PA Mid device 10 as shown in Figure 5 , the RF PA Mid device 10 is further configured with a coupled input port CPLIN. When the coupled input port CPLIN is configured in the RF PA Mid device 10, the number of the first contacts of the multi-channel selection switch 130 also needs to be correspondingly increased by one. Exemplarily, the multi-channel selection switch 130 can be a DP5T switch. That is, the coupling switch unit 143 includes five first contacts (1, 2, 3, 4, 5) and two second contacts (6, 7). Among them, one first contact (5) is connected to the coupled input port CPLIN. One second contact (7) is connected to the coupled output port CPLOUT, and one second contact (contact 6) is grounded.

[0092] In this embodiment, the RF DP4T switch can be replaced with a DP5T switch, and the number of the first contacts is increased to 5. When the second contact (7) is connected to the first contact (5), a path can be formed, and an external coupled signal (forward coupled signal or reverse coupled signal) can enter from the coupled input port CPLIN and then be output from the coupled output port CPLOUT. The coupled input port CPLIN can receive the coupled signal output from the coupled output port CPLOUT of other RF PA Mid devices 10, thereby shortening the RF trace length for transmitting the coupled signal, reducing the complexity of the RF system layout, reducing the area occupied by the RF system on the PCB, and reducing the cost.

[0093] As Figure 7 , 8 shown, in one embodiment, the number of the coupled output ports CPLOUT configured in the RF PA Mid device 10 is two, which are respectively denoted as the first coupled output port CPLOUT1 and the second coupled output port CPLOUT2. In one embodiment, the coupling switch unit 143 includes: a first coupling switch 1431, a second coupling switch 1432, and a third coupling switch 1433. Among them, one end of the first coupling switch 1431 is respectively connected to the first coupling end and the second coupling end of the first coupling unit 141; one end of the second coupling switch 1432 is respectively connected to the first coupling end and the second coupling end of the second coupling unit 142; the first end of the third coupling switch 1433 is respectively connected to the first end of the first coupling switch 1431 and the second end of the second coupling switch 1432; the second end of the third coupling switch 1433 is respectively connected to the two coupled output ports CPLOUT correspondingly, so that one of the coupled output ports CPLOUT outputs a first forward coupled signal or a second forward coupled signal, and the other coupled output port CPLOUT outputs a first reverse coupled signal or a second reverse coupled signal.

[0094] Exemplarily, the first coupling switch 1431 and the second coupling switch 1432 are SPDT switches, and the third coupling switch 1433 is a DPDT switch. By switching and controlling the three coupling switches in the coupling switch unit 143, the first forward coupling signal output by the first coupling unit 141 or the second forward coupling signal output by the second coupling unit 142 can be output through the first coupling output port CPLOUT1, or the first reverse coupling signal output by the first coupling unit 141 or the second reverse coupling signal output by the second coupling unit 142 can be output through the second coupling output port CPLOUT2, so as to detect the power information of the first coupling signal and the power information of the second coupling signal.

[0095] It should be noted that in the embodiments of the present application, the specific types and combination forms of the coupling switch unit 143 are not further limited.

[0096] In one embodiment, the first radio frequency signal includes 5G signals in the N77 frequency band and 5G signals in the N78 frequency band. As Figure 7 and Figure 8 shown, the radio frequency PA Mid device 10 is equipped with a first transmission port RFIN1, a second transmission port RFIN2, and a third transmission port RFIN3 that are respectively connected to a radio frequency transceiver. Among them, the first transmission port RFIN1 is used to receive 5G signals in the N77 frequency band, the first transmission port RFIN1 is used to receive 5G signals in the N79 frequency band, and the third transmission port RFIN3 is used to receive 5G signals in the N78 frequency band. Among them, the first transceiver circuit 110 further includes a third switch unit. Among them, the first selection end of the third switch unit is connected to the first transmission port RFIN1, the second selection end of the third switch unit is connected to the third transmission port RFIN3, and the control end of the third switch unit is connected to the input end of the first power amplifier 111, and is used to select and conduct the transmission paths where the first transmission port RFIN1 and the third transmission port RFIN3 are located. That is, 5G signals in the N77 frequency band enter the radio frequency PA Mid device 10 through the first transmission port RFIN1, and 5G signals in the N78 frequency band enter the radio frequency PA Mid device 10 through the third transmission port RFIN3.

[0097] In one embodiment, the radio frequency PA Mid device 10 further includes a first control unit 160 and a second control unit 170. Refer to Figure 7, the first control unit 160 is respectively connected to the first switch unit 114, the second switch unit 124, the first power amplifier 111, the second power amplifier 121, and the multi-channel selection switch 130, and is used to control the switching paths of the first switch unit 114, the second switch unit 124, and the multi-channel selection switch 130, and is also used to control the operating states of the first power amplifier 111 and the second power amplifier 121. The second control unit 170 is respectively connected to the first low-noise amplifier 113 and the second low-noise amplifier 123, and is used to adjust the gain coefficients of the first low-noise amplifier 113 and the second low-noise amplifier 123. Among them, the first low-noise amplifier 113 and the second low-noise amplifier 123 are amplification devices with adjustable gains, so as to adjust the insertion loss of the receiving link in the RF PA Mid device 10, thereby improving the sensitivity of its RF system. Exemplarily, the first low-noise amplifier 113 and the second low-noise amplifier 123 have 8 gain levels.

[0098] Reference Figure 8 , the first control unit 160 is respectively connected to the first power amplifier 111, the second power amplifier 121, and the multi-channel selection switch 130, and is used to control the switching path of the multi-channel selection switch 130, and is also used to control the operating states of the first power amplifier 111 and the second power amplifier 121.

[0099] Exemplarily, the first control unit 160 and the second control unit 170 can be RF front-end control interface (RFFront End Control Interface, RFFE) control units, and their control methods conform to the control protocol of the RFFE bus. When the first control unit 160 and the second control unit 170 are RFFE control units, the RF PA Mid device 10 is also configured with an input pin CLK for clock signals, an input pin SDATAS for data signals, a reference voltage pin VIO, and so on.

[0100] It should be noted that in the embodiments of the present application, the types of the first control unit 160 and the second control unit 170 are associated with the objects they control (the types of switch units, power amplifiers, and low-noise amplifiers). Here, the specific types of the first control unit 160 and the second control unit 170 are not further limited.

[0101] In one of the embodiments, as Figure 7 shown, each device in the RF PA Mid device 10 can be integrally packaged in the same packaging chip, and the pin configuration diagram of its packaging chip is as Figure 9a shown, and the structure of its packaging chip is as Figure 9b shown. As Figure 8Each device in the radio frequency PA Mid device 10 shown can be integrally packaged in the same package chip, and the pin configuration diagram of the package chip is as shown in Figure 10a shown, and the structure of the package chip is as shown in Figure 10b shown. That is, the first transceiver circuit 110, the second transceiver circuit 120, the multi-channel selection switch 130, the first coupling unit 141, the second coupling unit 142, the coupling switch unit 143, the first control unit 160, and the second control unit 170 are all integrally packaged in the same module to form a package chip. Among them, multiple ports configured for the radio frequency PA Mid device 10 correspond one-to-one with the pins of the package chip. Exemplarily, its antenna radiation ports (SRS1, SRS2, SRS3, SRS4) correspond one-to-one with the antenna pins (SRS1, SRS2, SRS3, SRS4) of the package chip.

[0102] In the embodiment of the present application, packaging each device in the radio frequency PA Mid device 10 in the same chip can improve the integration degree, reduce the space occupied by each device, and facilitate the miniaturization of the device.

[0103] In one of the embodiments, referring to Figure 1 , the radio frequency system includes an antenna group 20 and the radio frequency PA Mid device 10 in any of the above embodiments. Among them, the antenna group 20 includes a first antenna Ant0 and a second antenna Ant1. The first antenna Ant0 and the second antenna Ant1 are both antennas Ant that can support the 5G NR frequency band. Among them, the first antenna Ant0 can be used for receiving and transmitting (abbreviated as transceiver) the first radio frequency signal and / or the second radio frequency signal, and the second antenna Ant1 can be used for transceiver the first radio frequency signal and / or the second radio frequency signal.

[0104] In one of the embodiments, the first antenna Ant0 and the second antenna Ant1 can be directional antennas Ant or non-directional antennas Ant. Exemplarily, the first antenna Ant0 and the second antenna Ant1 can be formed using any suitable type of antenna. For example, the first antenna Ant0 and the second antenna Ant1 can 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. at least one of them. Different types of antennas can be used for different frequency band combinations of radio frequency signals.

[0105] Among them, the first antenna Ant0 is connected to a second end T1 of the multi-channel selection switch 130; the second antenna Ant1 is connected to another second port T2 of the multi-channel selection switch 130.

[0106] The above radio frequency system includes a first antenna Ant0, a second antenna Ant1, and a radio frequency PA Mid device 10. Among them, only by setting a multi-channel selection switch 130 inside the radio frequency PA Mid device 10 can the round-robin transmission of the detection reference signals of two frequency bands (the first radio frequency signal and the second radio frequency signal) between the first antenna Ant0 and the second antenna Ant1 be achieved. Compared with the traditional technology, the number of switches in the transmission path is reduced, the insertion loss of the transmission path can be reduced, the occupied space of the radio frequency PA Mid device 10 is also reduced, the cost is reduced, and the communication performance of the radio frequency system is improved.

[0107] As Figure 11 shown, in one embodiment, the radio frequency system includes the radio frequency PA Mid device 10, the first antenna Ant0, the second antenna Ant1, and the radio frequency L-DRX device 30 in any of the above embodiments. Among them, the second terminal P1 of the multi-channel selection switch 130 in the radio frequency A Mid device 10 is connected to the first antenna Ant0 through the antenna radio frequency port SRS1. The radio frequency L-DRX device 30 is configured with an antenna port ANT and a radio frequency transmission port 5G_TRX1. Among them, the antenna port ANT of the radio frequency L-DRX device 30 is connected to the second antenna Ant1, and the radio frequency transmission port 5G_TRX1 is connected to an antenna radio frequency port SRS2 in the radio frequency PA Mid device 10. Among them, the radio frequency L-DRX device 30 can receive the first radio frequency signal and the second radio frequency signal received by the second antenna Ant1 through the antenna port ANT, and perform filtering and amplification processing on the received first radio frequency signal and second radio frequency signal.

[0108] Among them, the radio frequency L-DRX device 30 includes a fourth switch unit 310. Among them, the fourth switch unit 310 is respectively connected to the antenna port ANT and the radio frequency transmission port 5G_TRX1, and is used to conduct the transmission path between the radio frequency PA Mid device 10 and the second antenna Ant1. That is, the radio frequency PA Mid device 10 can transmit the first radio frequency signal and the second radio frequency signal to the radio frequency transmission port 5G_TRX1 of the radio frequency L-DRX device 30 through the antenna radio frequency port SRS2, switch to the antenna port ANT through the fourth switch unit 310, and transmit it through the second antenna Ant1.

[0109] In the radio frequency system in the above embodiment, by integrating the multi-channel selection switch 130 in the radio frequency PA Mid device 10 and cooperating with the radio frequency L-DRX device 30, the round-robin transmission of radio frequency signals between the first antenna Ant00 and the second antenna Ant11 can be achieved without setting multiple independently cascaded switches, reducing the cost and the area occupied by each device on the substrate in the radio frequency system.

[0110] As Figure 14As shown, in one embodiment, the RF L-DRX device 30 is further configured with a RF receiving port and a RF receiving port. The RF L-DRX device 30 further includes a fifth filter 330, a fifth low-noise amplifier 320, a sixth filter 350, and a sixth low-noise amplifier 340. Among them, the fifth filter 330 is connected to the fourth switch unit 310 and is used to filter the received first RF signal; the fifth low-noise amplifier 320, the input end of the fifth low-noise amplifier 320 is connected to the fifth filter 330, and the input end of the fifth low-noise amplifier 320 is connected to the RF receiving port, and is used to amplify the filtered first RF signal. Among them, the fifth filter 330 and the fifth low-noise amplifier 320 can form the first receiving path of the RF L-DRX device 30 to realize the reception of the first RF signal.

[0111] The sixth filter 350 is connected to the fourth switch unit 310 and is used to filter the received second RF signal; the sixth low-noise amplifier 340, the input end of the sixth low-noise amplifier 340 is connected to the sixth filter 350, and the input end of the sixth low-noise amplifier 340 is connected to the RF receiving port, and is used to amplify the filtered second RF signal. Among them, the sixth filter 350 and the sixth low-noise amplifier 340 can form the second receiving path of the RF L-DRX device 30 to realize the reception of the second RF signal.

[0112] Among them, the type of the fifth filter 330 can be the same as that of the first filter 112, and can realize the filtering of the first RF signal. The fifth low-noise amplifier 320 can be the same as the first low-noise amplifier 113 in type and can support the amplification of the first RF signal. Correspondingly, the type of the sixth filter 350 can be the same as that of the second filter 122 and can realize the filtering of the second RF signal. Among them, the sixth low-noise amplifier 340 can be the same as the second low-noise amplifier 123 in type and can support the amplification of the second RF signal.

[0113] By setting a RF transmitting port 5G_TRX1 on the RF L-DRX device 30 and cooperating with the fourth switch unit 310, the transfer and transmission of the first RF signal or the second RF signal can be realized. At the same time, the RF L-DRX device 30 can also support the reception control of the first RF signal and the second RF signal.

[0114] In one embodiment, the fourth switch unit 310 can be a RF DP4T switch or a DP3T switch. In the embodiments of the present application, the specific type of the fourth switch unit 310 is not further limited.

[0115] In one embodiment, the RF L-DRX device 30 further includes a fifth switch unit 360. The first end of the fifth switch unit 360 is respectively connected to the output ends of the fifth low-noise amplifier 320 and the sixth low-noise amplifier 340. The second end of the fifth switch unit 360 is respectively connected to the RF receiving port and the RF receiving port, and is used to select and output the first RF signal and / or the second RF signal.

[0116] In one embodiment, the RF L-DRX device 30 further includes a third control unit 370 respectively connected to the fifth low-noise amplifier 320 and the sixth noise amplifier, and is used to adjust the gain coefficients of the fifth low-noise amplifier 320 and the sixth low-noise amplifier 340. The third control unit 370 may be of the same type as the second control unit 170 in the foregoing embodiment, and will not be elaborated herein.

[0117] The RF L-DRX device 30 in the above embodiment may also be a packaged chip, and each device in the RF L-DRX device 30 can be integrated on the same chip, which can improve the integration degree of the RF L-DRX device 30 and reduce the occupied space of the RF L-DRX device 30.

[0118] Furthermore, a plurality of RF transmitting ports 5G_TRX1 that can be connected to the RF PA Mid device 10 and a plurality of antenna ports ANT connected to the antenna Ant may be configured on the RF L-DRX device 30, and are used to receive the RF signals output by the RF PA Mid device 10 and transmit the received RF signals through the plurality of antenna ports ANT. It should be noted that the fourth switch unit 310 can be respectively connected to the plurality of RF transmitting ports 5G_TRX1 and the plurality of antenna ports ANT on the RF L-DRX device 30 to control the switching of the transceiver modes of the plurality of RF signals.

[0119] It should be noted that the RF L-DRX module provided in the embodiment of the present application can support the transceiver control of 5G signals in bands such as N77 and N79.

[0120] With the development and progress of technology, 5G mobile communication technology has gradually begun to be applied to communication devices. The 5G network supports beamforming technology and can transmit directionally to communication devices. For the base station to transmit directionally, it first has to detect the position of the communication device, the quality of the transmission path, etc., so as to allocate the resources of the base station to each communication device more accurately.

[0121] At present, there are two different modes for communication devices to feedback channel information, namely the Precoding Matrix Indicator (PMI) and the Sounding Reference Signal (SRS). The signal transmissions are respectively Figure 12a and 12b as 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 mechanism pre-set by the base station. By relying on terminal measurements and supplemented with various quantization algorithms, it estimates the channel information and resource requirements and reports them to the base station; while SRS uses channel reciprocity to let the terminal directly report the channel information to the base station. Obviously, the latter is more accurate.

[0122] The communication device sending SRS information is a way for the base station to detect the terminal position and channel quality; among which, the SRS antennas Ant are transmitted in a round-robin manner as Figure 13 shown, and the specific description is as follows:

[0123] Firstly, 1T1R: It is fixed to feedback information to the base station from the first antenna Ant0 and does not support SRS round-robin transmission;

[0124] Secondly, 1T4R: It transmits SRS information in a round-robin manner from the first antenna Ant0 to the fourth antenna Ant3, and only one antenna is selected for transmission each time. Currently, the Non-standalone (NSA) networking uses this mode;

[0125] Thirdly, 2T4R: It transmits SRS information in a round-robin manner from the first antenna Ant0 to the fourth antenna Ant3, and two antennas are selected for simultaneous transmission each time. Currently, the Standalone (SA) networking uses this mode.

[0126] In the SRS mode, the more antennas that can participate in transmitting the reference signal, the more accurate the channel estimation, and thus the higher the achievable rate; when the number of antennas is the same, the SA mode can complete the channel estimation faster than the NSA mode, improving the network experience.

[0127] Currently, major operators have all put forward the functional requirements for 5G NR to support SRS. For example, China Mobile clearly states in its "China Mobile 5G Terminal Product White Paper" that N41 / 79 must support the SRS function (1T2R or 2T4R); China Unicom clearly requires in its "China Unicom 5G Terminal White Paper" that N78 must support SRS 1T4R and 2T4R antenna Ant round-robin transmission; China Telecom states in its "China Telecom 5G Network-wide Connectivity Terminal Requirement White Paper" that it supports SRS transmission with 1 port and 2 ports, supports antenna Ant switching, and recommends supporting 4-antenna Ant round-robin transmission in the N78 frequency band, that is, SRS 1T4R and 2T4R.

[0128] Figure 15a and 15b As shown, in one embodiment, the radio frequency system includes a radio frequency PA Mid device 10, a first radio frequency L-DRX device 31, a second radio frequency L-DRX device 32, a third radio frequency L-DRX device 33, a first antenna Ant0, a second antenna Ant1, a third antenna Ant2, and a fourth antenna Ant3. Among them, a second end P1 of a multi-channel selection switch 130 of the radio frequency PA Mid device 10 is connected to the first antenna Ant0; a second end P2 of the multi-channel selection switch 130 of the radio frequency PA Mid device 10 is connected to the second antenna Ant1 through a radio frequency transmission port 5G_TRX1 of the first radio frequency L-DRX device 31 and a fourth switch unit 310; a second end P3 of the multi-channel selection switch 130 of the radio frequency PA Mid device 10 is connected to the third antenna Ant2 through a radio frequency transmission port 5G_TRX1 of the second radio frequency L-DRX device 32 and a fourth switch unit 310; a second end P4 of the multi-channel selection switch 130 of the radio frequency PA Mid device 10 is connected to the fourth antenna Ant3 through a radio frequency transmission port 5G_TRX1 of the third radio frequency L-DRX device 33 and a fourth switch unit 310.

[0129] Based on the radio frequency system of this embodiment, it can support the SRS function of four antennas Ant1T4R. Exemplarily, taking Figure 15a as an example, the SRS working principle of the N77 frequency band is analyzed:

[0130] The first radio frequency signal enters the radio frequency PA Mid device 10 through the first transmission port RFIN1 of the radio frequency PA Mid device 10, then passes through the first power amplifier 111 and the first filter 112 to the multi-channel selection switch 130, is switched to the antenna radiation port SRS1 by the multi-channel selection switch 130, and is output from the first antenna Ant0 through path 1; the multi-channel selection switch 130 is switched to the antenna radiation port SRS2, passes through path 2 to the transmission port of the first L-DRX device to the fourth switch unit 310, is switched to the antenna port ANT by the fourth switch unit 310, and is output from the second antenna Ant1 through path 5; the multi-channel selection switch 130 is switched to the antenna radiation port SRS3, passes through path 3 to the transmission port of the second L-DRX device to the fourth switch unit 310, is switched to the antenna port ANT by the fourth switch unit 310, and is output from the third antenna Ant2 through path 6; the multi-channel selection switch 130 is switched to the antenna radiation port SRS4, passes through path 4 to the transmission port of the third L-DRX device to the fourth switch unit 310, is switched to the antenna port ANT by the fourth switch unit 310, and is output from the fourth antenna Ant3 through path 7.

[0131] The SRS function transmitted in the N79 band is similar to that in the N77 band and is not described in detail here. The 1T4R SRS path configuration for the N77 and N79 bands is shown in Table 5.

[0132] Table 5 1T4R SRS detailed path configuration table

[0133] N77 N79 Channel0 Path 1 Path 1 Channel1 Path 2 -> Path 5 Path 2 -> Path 5 Channel2 Path 3 -> Path 6 Path 3 -> Path 6 Channel3 Path 4 -> Path 7 Path 4 -> Path 7

[0134] Figure 16a and 16b As shown, in one embodiment, the RF system includes a first RF PA Mid device 11, a first RF PA Mid device 12, a first RF L-DRX device 31, a second RF L-DRX device 32, a first antenna Ant0, a second antenna Ant1, a third antenna Ant2 and a fourth antenna Ant3. A second end P1 of the multi-channel selection switch 130 of the first RF PA Mid device 11 is connected to the first antenna Ant0 via the antenna rotation port SRS1. A second end P2 of the multi-channel selection switch 130 of the first RF PA Mid device 11 is connected to the second antenna Ant1 via the antenna rotation port SRS2, the RF transmit port 5G_TRX1 of the first RF L-DRX device 31, and the fourth switch unit 310. A second end P3 of the multi-channel selection switch 130 of the first RF PA Mid device 11 is connected to the third antenna Ant2 via the antenna rotation port SRS3, the RF transmit port 5G_TRX1 of the second RF L-DRX device 32, and the fourth switch unit 310. A second end P4 of the multi-channel selection switch 130 of the first RF PA Mid device 11 is connected to the antenna rotation port SRS4 of the second RF PA Mid device 10 via the antenna rotation port SRS4. The antenna rotation port SRS2 of the second RF PA Mid device 12 is connected to the fourth antenna Ant3.

[0135] The radio frequency system of this embodiment can support the SRS function of the four-antenna Ant2T4R. The specific 2T4R SRS path configuration is shown in Table 6.

[0136] Table 6 2T4R SRS detailed path configuration table

[0137] N77 N79 Channel0 Path 1 Path 1 Channel1 Path 2 -> Path 5 Path 2 -> Path 5 Channel2 Path 3 -> Path 6 Path 3 -> Path 6 Channel3 Path 4 -> Path 8 Path 4 -> Path 8

[0138] In Table 5 and Table 6, Channel 0, Channel 1, Channel 2, and Channel 3 are transmission channels of antenna Ant that transmit in turn.

[0139] The radio frequency system in the above embodiments can support the SRS function of 1T4R or the SRS function of 2T4R. At the same time, the radio frequency system is based on the package to set the radio frequency L-DRX device 30 and the radio frequency PA Mid device 10, and it can realize the alternating transmission of radio frequency signals among the first antenna Ant0, the second antenna Ant1, the third antenna Ant2 and the fourth antenna Ant3 without setting multiple independently cascaded switches, reducing the cost and the area occupied by each device in the radio frequency system on the substrate.

[0140] As Figure 17 shown, an embodiment of the present application further provides a communication device, on which the radio frequency transceiver system and the radio frequency transceiver 90 in any of the above embodiments are provided. Exemplarily, the radio frequency transceiver 90 may include a transmitter (such as transmitter TX) and a receiver (such as receiver RX), or may only include a receiver (for example, receiver RX) or only include a transmitter (for example, transmitter TX). Among them, the radio frequency transceiver 90 can be used to implement the frequency conversion processing between the intermediate frequency signal and the baseband signal, or / and, to implement the frequency conversion processing between the intermediate frequency signal and the high frequency signal, etc.

[0141] By setting the radio frequency transceiver system on the communication device, the integration degree of the radio frequency transceiver system is improved, the area occupied by each device in the radio frequency transceiver system on the substrate is reduced, and at the same time, the power supply, logic control and PCB layout wiring of the radio frequency PA Mid device 10 and the radio frequency L-DRX module can be simplified, saving the cost.

[0142] The above embodiments only represent several implementation manners of the present application, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the patent scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A radio frequency PA Mid device, comprising a coupled output port, a first transmit port for connecting to a radio frequency transceiver, a second transmit port, and four antenna transmission ports for connecting to antennas, the radio frequency PA Mid device comprising: a first transceiver circuit connected to the first transmitting port, configured to receive a first radio frequency signal via the first transmitting port and amplify and filter the received first radio frequency signal; a second transceiver circuit, connected to the second transmitting port, configured to receive a second radio frequency signal via the second transmitting port, and amplify and filter the received second radio frequency signal; A multi-channel selection switch, comprising at least two first ends and four second ends, wherein one first end is connected to the first transceiver circuit, another first end is connected to the second transceiver circuit, and the four second ends are connected one-to-one to the four antenna transmission ports. The multi-channel selection switch is used to select and conduct a transmission path between the first transceiver circuit, the second transceiver circuit, and any one of the antenna transmission ports, to support the function of rotating transmission of a dual-band sounding reference signal between the four antennas via the four antenna transmission ports. a first coupling unit, provided in a transmission path of the first transceiver circuit, for coupling the first radio frequency signal to output a first forward coupled signal and a first reverse coupled signal; a second coupling unit, provided in a transmission path of the second transceiver circuit, for coupling the second radio frequency signal to output a second forward coupled signal and a second reverse coupled signal through the coupled output port; a coupling switch unit, connected to the first coupling unit and the second coupling unit, respectively, for selecting to output the first forward coupling signal, the first reverse coupling signal, the second forward coupling signal, or the second reverse coupling signal via the coupling output port; wherein the coupling switch unit comprises at least four first contacts and two second contacts, wherein one first contact is connected to the first coupling end of the first coupling unit, one first contact is connected to the second coupling end of the first coupling unit, one first contact is connected to the first coupling end of the second coupling unit, and one first contact is connected to the second coupling end of the second coupling unit; one second contact is grounded via a resistor, and one second contact is connected to the coupling output port; Wherein, each device in the radio frequency PA Mid device is integrated and packaged in the same package chip.

2. The RF PA Mid device according to claim 1, characterized in that: The first transceiver circuit includes: a first power amplifier, wherein an input end of the first power amplifier is connected to the first transmitting port, and is configured to amplify the first radio frequency signal; a first filter, connected to the output end of the first power amplifier and a first end of the multi-channel selection switch, respectively, for filtering the received first radio frequency signal; The second transceiver circuit includes: a second power amplifier, wherein an input end of the second power amplifier is connected to the second transmitting port, and is configured to amplify the second radio frequency signal; The second filter is connected to the output end of the second power amplifier and the other first end of the multi-channel selection switch respectively, and is used for filtering the received second radio frequency signal.

3. The radio frequency PAMid device according to claim 2, characterized in that: The radio frequency PAMid device is further configured with a first receiving port and a second receiving port for connecting to a radio frequency transceiver, and the first transceiver circuit further includes: a first low-noise amplifier, wherein an output end of the first low-noise amplifier is connected to the first receiving port, and is configured to amplify the received first radio frequency signal; a first switch unit, connected to the output end of the first power amplifier, the input end of the first low-noise amplifier, and the first filter, respectively, for selectively conducting a receiving path where the first receiving port is located or a transmitting path where the first transmitting port is located; The second transceiver circuit further includes: a second low-noise amplifier, wherein an output end of the second low-noise amplifier is connected to the second receiving port, and is configured to amplify the received second radio frequency signal; The second switch unit is connected to the output end of the second power amplifier, the input end of the second low noise amplifier and the second filter respectively, and is used to select and conduct the receiving path where the second receiving port is located or the transmitting path where the second transmitting port is located.

4. The RF PA Mid device according to claim 3, characterized in that: The multi-channel selection switch includes two first ends, wherein one first end is connected to the first filter, and the other first end is connected to the second filter.

5. The radio frequency PA Mid device according to claim 4, characterized in that: The multi-channel selection switch is a radio frequency DP4T switch.

6. The radio frequency PA Mid device according to claim 2, characterized in that: The radio frequency PA Mid device is further configured with a first receiving port and a second receiving port for connecting to a radio frequency transceiver. The multi-channel selection switch includes four first terminals, wherein: The first transceiver circuit further includes: a third low-noise amplifier, wherein an output end of the third low-noise amplifier is connected to the first receiving port, and is configured to amplify the received first radio frequency signal; a third filter, connected to the input end of the third low-noise amplifier and another first end of the multi-channel selection switch, respectively, for filtering the received first radio frequency signal; The second transceiver circuit further includes: a fourth low-noise amplifier, wherein an output end of the fourth low-noise amplifier is connected to the first receiving port, and is configured to amplify the received second radio frequency signal; The fourth filter is connected to the input end of the fourth low noise amplifier and the further first end of the multi-channel selection switch respectively, and is used for filtering the received second radio frequency signal.

7. The radio frequency PAMid device according to claim 6, characterized in that: The multi-channel selection switch includes four first terminals.

8. The radio frequency PA Mid device according to claim 7, characterized in that: The multi-channel selection switch is a radio frequency 4P4T switch.

9. The radio frequency PA Mid device according to claim 1, characterized in that: The RF PA Mid device is further configured with a coupling input port, which is connected to a first contact of the coupling switch unit. The coupling input port is used to receive an external coupling signal and output the coupling signal through the coupling output port.

10. The radio frequency PA Mid device according to claim 2, characterized in that: The first radio frequency signal includes a 5G signal in the N77 frequency band and / or a 5G signal in the N78 frequency band, and the second radio frequency signal is a 5G signal in the N79 frequency band.

11. The radio frequency PA Mid device according to claim 10, characterized in that: The first RF signal includes a 5G signal in the N77 frequency band and a 5G signal in the N78 frequency band; the RF PA Mid device is further equipped with a third transmitting port, the first transmitting port is used to receive the 5G signal in the N77 frequency band, and the third transmitting port is used to receive the 5G signal in the N78 frequency band; wherein the first transceiver circuit further includes: a third switch unit, wherein a first selection end of the third switch unit is connected to the first transmit port, a second selection end of the third switch unit is connected to the third transmit port, and a control end of the third switch unit is connected to the input end of the first power amplifier, and is used to select and conduct the transmit paths where the first transmit port and the third transmit port are located.

12. A radio frequency system, characterized in that: include: The radio frequency PA Mid device according to any one of claims 1 to 11; The antenna group includes at least: a first antenna connected to a second end of the multi-channel selection switch; The second antenna is connected to another second port of the multi-channel selection switch.

13. The radio frequency system according to claim 12, wherein: The radio frequency system further comprises: A radio frequency L-DRX device is configured with an antenna port and a radio frequency transmission port, the radio frequency L-DRX device is used to receive a first radio frequency signal and a second radio frequency signal through the antenna port, and filter and amplify the received first radio frequency signal and second radio frequency signal; wherein, The radio frequency L-DRX device includes: a fourth switch unit connected to the antenna port and the radio frequency transmission port respectively, and the fourth switch unit is used to conduct a transmission path between the radio frequency PA Mid device and the second antenna.

14. The radio frequency system according to claim 13, characterized in that The radio frequency L-DRX device is further configured with a radio frequency receiving port and a radio frequency receiving port, and the radio frequency L-DRX device further includes: a fifth filter, connected to the fourth switch unit, and configured to filter the received first RF signal; a fifth low-noise amplifier, wherein an input end of the fifth low-noise amplifier is connected to the fifth filter, and an input end of the fifth low-noise amplifier is connected to the RF receiving port, and is configured to amplify the first RF signal after filtering; a sixth filter, connected to the fourth switch unit, and configured to filter the received second RF signal; A sixth low noise amplifier, wherein the input end of the sixth low noise amplifier is connected to the sixth filter, and the input end of the sixth low noise amplifier is connected to the RF receiving port, and is used to amplify the second RF signal after filtering.

15. The radio frequency system according to claim 14, characterized in that: The radio frequency L-DRX device further includes: A fifth switch unit, wherein the first end of the fifth switch unit is respectively connected to the output end of the fifth low-noise amplifier and the output end of the sixth low-noise amplifier, and the second end of the fifth switch unit is respectively connected to the RF receiving port and the RF receiving port, for selecting to output the first RF signal and / or the second RF signal.

16. The radio frequency system according to claim 13, characterized in that The number of the radio frequency L-DRX devices is three, namely a first radio frequency L-DRX device, a second radio frequency L-DRX device and a third radio frequency L-DRX device; the antenna group also includes a third antenna and a fourth antenna; A second end of the multi-channel selection switch of the radio frequency PA Mid device is connected to the first antenna via an antenna wheel transmitting port; A second end of the multi-channel selection switch of the radio frequency PAMid device is connected to the second antenna via an antenna wheel transmitting port, a radio frequency transmitting port of the first radio frequency L-DRX device, and a fourth switch unit; A second end of the multi-channel selection switch of the radio frequency PA Mid device is connected to the third antenna via an antenna wheel transmitting port, a radio frequency transmitting port of the second radio frequency L-DRX device, and a fourth switch unit; A second end of the multi-channel selection switch of the radio frequency PA Mid device is connected to the fourth antenna via an antenna wheel transmitting port, a radio frequency transmitting port of the third radio frequency L-DRX device, and a fourth switch unit.

17. The radio frequency system according to claim 13, wherein: There are two RF PA Mid devices, namely a first RF PA Mid device and a second RF PA Mid device; there are two RF L-DRX devices, namely a first RF L-DRX device and a second RF L-DRX device; the antenna group also includes a third antenna and a fourth antenna; A second end of the multi-channel selection switch of the first radio frequency PA Mid device is connected to the first antenna via an antenna wheel transmitting port; A second end of the multi-channel selection switch of the first radio frequency PA Mid device is connected to the second antenna via an antenna wheel transmitting port, a radio frequency transmitting port of the first radio frequency L-DRX device, and a fourth switch unit; A second end of the multi-channel selection switch of the first radio frequency PA Mid device is connected to the third antenna via an antenna wheel transmitting port, a radio frequency transmitting port of the second radio frequency L-DRX device, and a fourth switch unit; A second end of the multi-channel selection switch of the first RF PA Mid device is connected to an antenna rotary port of the second RF PA Mid device via an antenna rotary port, and another antenna rotary port of the second RF PA Mid device is connected to the fourth antenna.

18. A communication device comprising: RF transceiver, The radio frequency system according to any one of claims 12 to 17, wherein the radio frequency system is connected to the radio frequency transceiver.

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