Radio frequency system and communication device

Abstract

The invention relates to a radio frequency system and communication equipment, and the radio frequency system comprises a radio frequency transceiver which is configured with a first radio frequency channel group and a second radio frequency channel group; the two first receiving channels of the radio frequency front-end module are correspondingly connected with the two radio frequency channels of the first radio frequency channel group respectively; the radio frequency receiving module comprises a second receiving channel and three third receiving channels, the second receiving channel is correspondingly connected with the remaining radio frequency channel of the first radio frequency channel group, and the three third receiving channels are correspondingly connected with the three radio frequency channels of the second radio frequency channel group respectively; a plurality of first ends of the switch module are connected with the first receiving channels and the second receiving channels respectively, a plurality of second ends of the switch module are correspondingly connected with the four antennas respectively, the radio frequency system can receive the first target signals in four ways and receive the second target signals in two ways, each receiving channel can be utilized reasonably, and the receiving efficiency of the radio frequency system is improved. In addition, the receiving performance of the radio frequency system can be improved.

Description

Technical Field

[0001] This application relates to the field of radio frequency technology, and in particular to a radio frequency system and communication device. Background Technology

[0002] With the continuous development of communication technology, communication equipment needs to support more and more communication frequency bands. Correspondingly, radio frequency systems also need to set up more and more radio frequency front-end modules to form multiple transceiver links to support multi-band communication.

[0003] However, in practical applications, some receiving channels in some RF front-end modules may be relatively idle, resulting in low utilization of the receiving channels in the RF front-end modules. Summary of the Invention

[0004] This application provides a radio frequency system and communication device that can make reasonable use of each receiving channel in the radio frequency front-end module and radio frequency receiving module, thereby improving the utilization rate of the receiving link and enhancing the receiving performance of the radio frequency system.

[0005] The first aspect provides a radio frequency system, comprising:

[0006] The radio frequency transceiver is configured with a first radio frequency channel group and a second radio frequency channel group, wherein each radio frequency channel group includes three radio frequency channels;

[0007] The radio frequency front-end module includes two first receiving channels, which are respectively connected to two radio frequency channels of the first radio frequency channel group.

[0008] The radio frequency (RF) receiving module includes a second receiving channel and three third receiving channels. The second receiving channel is connected to the remaining RF channel of the first RF channel group, and the three third receiving channels are respectively connected to the three RF channels of the second RF channel group. The first receiving channel, the second receiving channel, and the third receiving channels are used to support the reception and processing of the first RF signal and the second RF signal, respectively.

[0009] A switching module, wherein multiple first terminals of the switching module are respectively connected to each of the first receiving channels and each of the second receiving channels, and multiple second terminals of the switching module are respectively connected to four antennas; wherein...

[0010] The switching module is used to select and connect the paths between the four antennas and the first target receiving channel group respectively, so as to support four-way reception of the first target signal, and to select and connect the paths between any two antennas and the second target receiving channel group, so as to support two-way reception of the second target signal; the first target receiving channel group includes one first receiving channel, a second receiving channel and two third receiving channels, the second target receiving channel group includes another first receiving channel and another third receiving channel, the first radio frequency signal and the second radio frequency signal have different frequency bands; one of the first target signal and the second target signal is the first radio frequency signal and the other is the second radio frequency signal.

[0011] The second aspect provides a communication device, including a first antenna, a second antenna, a third antenna, a fourth antenna, and the aforementioned radio frequency system.

[0012] The aforementioned radio frequency system and communication equipment include a radio frequency transceiver, a radio frequency front-end module, a radio frequency receiving module, and a switching module. The radio frequency transceiver is configured with a first radio frequency channel group and a second radio frequency channel group, each of which includes three radio frequency channels. The radio frequency front-end module includes two first receiving channels, each connected to one of the two radio frequency channels of the first radio frequency channel group. The radio frequency receiving module includes a second receiving channel and three third receiving channels. The second receiving channel is connected to the remaining radio frequency channel of the first radio frequency channel group, and the three third receiving channels are connected to the three radio frequency channels of the second radio frequency channel group. The switching module can selectively guide... The system establishes pathways between four antennas and the first target receiving channel group to support four-way reception of the first target signal, and selectively connects any two antennas to the second target receiving channel group to support two-way reception of the second target signal. Thus, the RF system, based on four antennas, supports four-way reception of the first target signal and dual-way reception of the second target signal. Each receiving channel in the RF front-end module and RF receiving module can be connected to its corresponding antenna, enabling downlink reception processing of the received signal without any idle receiving channels. Furthermore, it can improve the downlink throughput and carrier aggregation capability of the RF system, thereby enhancing its reception performance. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is one of the structural block diagrams of a radio frequency system in one embodiment;

[0016] Figure 2 This is a second structural block diagram of a radio frequency system in one embodiment;

[0017] Figure 3 This is the third structural block diagram of the radio frequency system in one embodiment;

[0018] Figure 4 This is a partial structural block diagram of a radio frequency system in one embodiment;

[0019] Figure 5 This is the fourth block diagram of the radio frequency system in one embodiment;

[0020] Figure 6 This is the fifth block diagram of the radio frequency system in one embodiment;

[0021] Figure 7 This is a block diagram of the radio frequency system in one embodiment;

[0022] Figure 8 This is a structural block diagram of a communication device in one embodiment. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0024] It is understood that the terms "first," "second," etc., used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, without departing from the scope of this application, a first transmission link may be referred to as a second transmission link, and similarly, a second transmission link may be referred to as a first transmission link. Both the first transmission link and the second transmission link are transmission links, but they are not the same transmission link.

[0025] like Figure 1As shown in the figure, this application provides a radio frequency system, which includes a radio frequency transceiver 10, a radio frequency front-end module 20, a radio frequency receiving module 30, and a switch module 40. The radio frequency front-end module 20 and the radio frequency receiving module 30 are respectively connected to the radio frequency transceiver 10. Multiple first terminals of the switch module 40 are respectively connected to the radio frequency front-end module and the radio frequency receiving module 30, and multiple second terminals of the switch module 40 are respectively connected to four antennas ANT1, ANT2, ANT3, and ANT4.

[0026] The radio frequency transceiver 10 is configured with a first radio frequency channel group 101 and a second radio frequency channel group 102, wherein each radio frequency channel group includes three radio frequency channels. For example, the first radio frequency channel group 101 includes three radio frequency channels, and the second radio frequency channel group 102 also includes three radio frequency channels. Each radio frequency channel can support uplink and downlink processing of signals, such as, but not limited to, modulation, amplification, frequency conversion, filtering, and demodulation.

[0027] For ease of explanation, the first RF channel group 101 can be referred to as the main RF channel group, and the second RF channel group 102 can be referred to as the diversity RF channel group.

[0028] The first RF channel group 101 and the second RF channel group 102 can operate simultaneously. For example, at least two RF channels of the first RF channel group 101 and the second RF channel group 102 can operate simultaneously. Exemplarily, all RF channels of the first RF channel group 101 and the second RF channel group 102 can operate simultaneously, such as two RF channels operating simultaneously.

[0029] The radio frequency front-end module 20 includes two first receiving channels Rx1, which are respectively connected to two radio frequency channels of the first radio frequency channel group 101. For example, each first receiving channel Rx1 is connected to one radio frequency channel of the first radio frequency channel group 101, and each first receiving channel Rx1 is connected to a different radio frequency channel.

[0030] Each first receiving channel Rx1 is equipped with a low-noise amplifier to support the amplification of the received first radio frequency signal and the second radio frequency signal, and to support the receiving processing of the first radio frequency signal and the second radio frequency signal.

[0031] The first radio frequency (RF) signal and the second RF signal operate in different frequency bands. For example, the first RF signal and the second RF signal can be cellular mobile signals, Bluetooth signals, WiFi signals, etc. The cellular signal can include 4G LTE signals or 5G NR signals. The different frequency bands indicate that the frequency ranges of their corresponding frequency bands are not entirely the same. For example, the first RF signal and the second RF signal can each be two sub-bands of a low-frequency band, or two sub-bands of a mid-frequency band, or two sub-bands of a high-frequency band, or two sub-bands of an ultra-high-frequency band. For example, the sub-bands of the mid-frequency band of a 4G LTE signal can be B1, B3, B25, B39, or B34; the sub-bands of the mid-frequency band of a 5G NR signal can be N1, N3, N25, N39, or N34. The sub-bands of the high-frequency band can be B41 / N41, or B40 / N40, etc.

[0032] Optionally, the first radio frequency signal and the second radio frequency signal can be intermediate frequency signals and high frequency signals, respectively. Alternatively, the first radio frequency signal and the second radio frequency signal can be low frequency signals and intermediate frequency signals, respectively. Alternatively, the first radio frequency signal and the second radio frequency signal can be high frequency signals and ultra-high frequency signals, etc.

[0033] In an optional embodiment, each first receiving channel Rx1 supports filtering of the received first radio frequency signal and second radio frequency signal.

[0034] In an optional embodiment, the radio frequency front-end module 20 is connected to the radio frequency transceiver 10 and can be used to receive a first radio frequency signal and a second radio frequency signal from the radio frequency transceiver 10, perform uplink processing on them (e.g., including but not limited to power amplification processing, filtering processing, etc.), and transmit them to the antenna output via the switching module 40 to realize the transmission of the first radio frequency signal and the second radio frequency signal.

[0035] In one exemplary embodiment, the radio frequency front-end module 20 may be a radio frequency front-end device, including but not limited to a cover FEM device, a PA Mid device, an L-PA Mid device, etc.

[0036] The radio frequency (RF) receiver module 30 is configured with four receiving channels to support the reception and processing of a first RF signal and a second RF signal. For example, the RF receiver module 30 includes a second receiving channel Rx2 and three third receiving channels Rx3. The second receiving channel Rx2 and the third receiving channels Rx3 are used to support the reception and processing of the first RF signal and the second RF signal, respectively.

[0037] The second receiving channel Rx2 is connected to the remaining radio frequency channel of the first radio frequency channel group 101; the three third receiving channels Rx3 are connected to the three radio frequency channels of the second radio frequency channel group 102 respectively. For example, each third receiving channel Rx3 is connected to one radio frequency channel of the second radio frequency channel group 102, and each third receiving channel Rx3 is connected to a different radio frequency channel.

[0038] Each of the second receiving channel Rx2 and the third receiving channel Rx3 is provided with a low-noise amplifier to support the amplification of the received first radio frequency signal and the second radio frequency signal, so as to support the receiving processing of the first radio frequency signal and the second radio frequency signal.

[0039] In an optional embodiment, each of the second receiving channel Rx2 and the third receiving channel Rx3 may also support filtering of the received first radio frequency signal and the second radio frequency signal.

[0040] In one exemplary embodiment, the radio frequency receiving module 30 may be a radio frequency receiving device, including but not limited to FEM devices, LNA module devices, etc.

[0041] The multiple first terminals of the switch module 40 are respectively connected to each first receiving channel Rx1 and each second receiving channel Rx2, and the multiple second terminals of the switch module 40 are respectively connected to the four antennas.

[0042] The switch module 40 is used to select and connect the paths between the four antennas and the first target receiving channel group respectively to support four-way reception of the first target signal, and to select and connect the paths between any two antennas and the second target receiving channel group to support two-way reception of the second target signal.

[0043] It should be understood that all four antennas can be used to support the reception and transmission of the first and second radio frequency signals. The first target receiving channel group may include four receiving channels, and the second target receiving channel group may include two receiving channels. For example, the first target receiving channel group includes a first receiving channel Rx1, a second receiving channel Rx2, and two third receiving channels Rx3, and the second target receiving channel group includes another first receiving channel Rx1 and another third receiving channel Rx3.

[0044] The switching module 40 can simultaneously connect the four antennas to the four receiving channels of the first target receiving channel group, forming four receiving links for the first target signal to support four-way reception of the first target signal. Furthermore, it can also connect any two antennas to the two receiving channels of the second target receiving channel group, forming two receiving links for the second target signal to support two-way reception of the second target signal. The four receiving links for the first target signal can be: a first link electrically connected to the first receiving channel Rx1 and the radio frequency channel of the first radio frequency channel group 101; a second link electrically connected to the second receiving channel Rx2 and the radio frequency channel of the first radio frequency channel group 101; and a third or fourth link electrically connected to the third receiving channel Rx3 and the radio frequency channel of the second radio frequency channel group 102. The two receiving links for the second target signal are: a fifth link electrically connected to another first receiving channel Rx1 and the radio frequency channel of the first radio frequency channel group 101; and a sixth link electrically connected to another third receiving channel Rx3 and the radio frequency channel of the second radio frequency channel group 102.

[0045] In this system, one of the first target signal and the second target signal is a first radio frequency (RF) signal, and the other is a second RF signal. It should be understood that by controlling the on / off state of the switch module 40, four receiving links for the first target signal and two receiving links for the second target signal can be activated. This allows for support for four-way reception of the first RF signal and two-way reception of the second RF signal, or vice versa, to support carrier aggregation of the first and second RF signals. For example, if the first RF signal is a B1 band signal and the second RF signal is a B3 band signal, the RF system can support four-way reception of the B1 band signal and two-way reception of the B3 band signal, or vice versa. In this way, each receiving channel in the RF front-end module and RF receiving module of the RF system can be connected to the corresponding antenna, and the received signal can be processed for downlink reception without any idle receiving channel. In addition, the downlink throughput of the RF system can be improved, the carrier aggregation capability of the RF system can be improved, and thus the reception performance of the RF system can be improved.

[0046] In an exemplary embodiment, the switch module 40 is further configured to select and activate the path between the third target receiving channel group and the four antennas to support four-way reception of the target radio frequency signal, thereby supporting 4x4 MIMO functionality for the target radio frequency signal. The target radio frequency signal includes either a first radio frequency signal or a second radio frequency signal. It should be understood that the on / off state of the switch module 40 can be controlled to support 4x4 MIMO functionality for the first and second radio frequency signals in a time-division multiplexing manner.

[0047] The third target receiving channel group includes any one of the first receiving channels Rx1 and three third receiving channels Rx3. For example, when the switch module 40 connects the third target receiving channel group to the four antennas, it can connect the four antennas to the first receiving channel Rx1 and the three third receiving channels Rx3 respectively, wherein each antenna is connected to one receiving channel.

[0048] In this embodiment, when the switching module 40 connects the third target receiving channel group and the four antennas, it can support the 4*4 MIMO capability of two single-frequency signals, the first radio frequency signal and the second radio frequency signal, in a time-division manner. For example, it can support the 4*4 MIMO capability of B1 (or N1), B3 (or N3) or B41 (or N41), which can improve the downlink throughput of the first radio frequency signal and the second radio frequency signal, thereby improving their reception performance.

[0049] In an exemplary embodiment, the RF front-end module 20 supports not only the reception processing of the first RF signal and the second RF signal, but also the transmission processing of the first RF signal and the second RF signal. The RF front-end module 20 includes a second receiving channel Rx2 and three third receiving channels Rx3, and also includes a first transmitting channel. The first transmitting channel is connected to the RF transceiver 10 and the switching module 40, respectively, to support the transmission of the first RF signal and the second RF signal. Exemplarily, its first transmitting channel is equipped with at least one power amplifier to support power amplification of the first RF signal and the second RF signal.

[0050] For example, the first transmit channel may be equipped with a switching switch and a power amplifier that can support power amplification of the first radio frequency signal and the second radio frequency signal. Its radio frequency transceiver 10 can provide the first radio frequency signal and the second radio frequency signal to the first transmit channel in a time-division manner, thereby enabling the first transmit channel to support time-division transmission of the first radio frequency signal and the second radio frequency signal.

[0051] In an optional embodiment, the first transmission channel may include a first sub-transmission channel and a second sub-transmission channel. Each sub-transmission channel is equipped with a power amplifier, wherein one power amplifier supports power amplification of the first radio frequency signal, and the other power amplifier supports power amplification of the second radio frequency signal. The first sub-transmission channel and the second sub-transmission channel can operate simultaneously to support the transmission processing of the first radio frequency signal and the second radio frequency signal.

[0052] The switch module 40 is also used to select and connect the first transmission channel to the four antennas respectively, so as to support the alternating transmission of the first radio frequency signal and the second radio frequency signal among the four antennas.

[0053] The radio frequency system can not only support multiple reception of the first radio frequency signal and the second radio frequency signal, but also support the transmission of the first radio frequency signal and the second radio frequency signal. The transmission of the first radio frequency signal and the second radio frequency signal can be switched between four antennas, which can improve the carrier aggregation capability of the first radio frequency signal and the second radio frequency signal in uplink transmission and downlink reception. It can also realize the dual SIM dual standby (DR-DSDS) or dual SIM dual active (DSDA) combination of the first radio frequency signal and the second radio frequency signal in two frequency bands, thereby improving the communication performance of dual SIM cards.

[0054] In this embodiment of the application, for ease of explanation, a power amplifier is provided in the first transmission channel, and the power amplifier can support power amplification of the first radio frequency signal and the second radio frequency signal.

[0055] like Figure 2 As shown, in an exemplary embodiment, the radio frequency front-end module 20 is a radio frequency transceiver device 201, which includes a first power amplifier 210, a first 230 switching unit 220, a first filtering unit 230, a first low noise amplifier 240, and a second low noise amplifier 250.

[0056] A first power amplifier 210 and a first filter unit 230 are respectively provided on the first transmission path. A first filter unit 230 and a first low noise amplifier 240 are respectively provided on one of the first receiving channels Rx1; and a first filter unit 230 and a second low noise amplifier 250 are respectively provided on the other first receiving channel Rx1.

[0057] The first power amplifier 210 is connected to the radio frequency transceiver 10 and is used to support power amplification of the first radio frequency signal and the second radio frequency signal.

[0058] The first terminal of the first switching unit 220 is connected to the output terminal of the first power amplifier 210.

[0059] The first terminals of the first filter unit 230 are respectively connected to the first terminals of the first switch unit 220, and the second terminals of the first filter unit 230 are connected to the switch module 40 via the first antenna port of the radio frequency transceiver device 201.

[0060] The first filtering unit 230 is used to filter out spurious signals to allow isolated output of the first radio frequency (RF) signal and the second RF signal. For example, the first filtering unit 230 may include two sub-filters, each with a different passband frequency. For instance, one sub-filter allows the first RF signal to pass through, while the other sub-filter allows the second RF signal to pass through. In an optional embodiment, the first filtering unit 230 may also be a duplexer, enabling filtered isolation processing of the first and second RF signals.

[0061] The input terminal of the first low-noise amplifier 240 is connected to a first terminal of the first filter unit 230, and the output terminal of the first low-noise amplifier 240 is connected to a radio frequency channel of the first radio frequency channel group 101 of the radio frequency transceiver 10 via the first receiving port of the radio frequency transceiver device 201. The first low-noise amplifier 240 is used to amplify the first radio frequency signal after filtering.

[0062] The input terminal of the second low-noise amplifier 250 is connected to the other first terminal of the first filter unit 230, and the output terminal of the second low-noise amplifier 250 is connected to the other RF channel of the first RF channel group 101 of the RF transceiver 10 via the second receiving port of the RF transceiver 201. The second low-noise amplifier 250 is used to amplify the filtered second RF signal.

[0063] In this embodiment, the RF front-end module 20 is an RF front-end device, such as a PA Mid device, which integrates a first power amplifier 210, a first switching unit 220, a first filtering unit 230, a first low-noise amplifier 240, and a second low-noise amplifier 250. By setting the connection relationship between the various devices, two first receiving channels and a first transmitting channel can be formed, which can support the transmission of the first RF signal and the second RF signal as well as dual-channel reception. It can cooperate with the RF receiving module 30 to support the transmission and four-channel reception of the first RF signal, as well as the transmission and dual-channel reception of the second RF signal. Alternatively, it can also support the transmission and dual-channel reception of the first RF signal, as well as the transmission and four-channel reception of the second RF signal.

[0064] The specific structure of the radio frequency receiving module 30 is described below with reference to the accompanying drawings.

[0065] like Figure 3 As shown, in an exemplary embodiment, the radio frequency receiving module 30 includes: a third low noise amplifier 301, a fourth low noise amplifier 302, a fifth low noise amplifier 303, a sixth low noise amplifier 304, a third filtering unit 310, a fourth filtering unit 320, a fifth filtering unit 330, and a third switching unit 340.

[0066] The output of the third low-noise amplifier 301 is the output of the second receiving channel Rx2, used to support the amplification of the first radio frequency signal and the second radio frequency signal.

[0067] The output of the fourth low-noise amplifier 302 is the output of a third receiving channel Rx3, which is used to support the amplification of the first radio frequency signal and the second radio frequency signal.

[0068] The output of the fifth low-noise amplifier 303 is the output of another third receiving channel Rx3, which is used to support the amplification of the first radio frequency signal and the second radio frequency signal.

[0069] The output of the sixth low-noise amplifier 304 is the output of another third receiving channel Rx3, which is used to support the amplification of the first radio frequency signal and the second radio frequency signal.

[0070] The multiple first terminals of the third switching unit 340 are respectively connected to the input terminals of the third low-noise amplifier 301, the fourth low-noise amplifier 302, the fifth low-noise amplifier 303 and the sixth low-noise amplifier 304.

[0071] The plurality of first terminals of the third filter unit 310, the plurality of first terminals of the fourth filter unit 320, and the plurality of first terminals of the fifth filter unit 330 are respectively connected to the plurality of second terminals of the third switch unit 340. The second terminals of the third filter unit 310, the fourth filter unit 320, and the fifth filter unit 330 are respectively directly or indirectly electrically connected to the switch module 40.

[0072] The third filter unit 310, the fourth filter unit 320, and the fifth filter unit 330 are used to filter out spurious waves to allow isolated output of the first radio frequency signal and the second radio frequency signal. The third filter unit 310, the fourth filter unit 320, and the fifth filter unit may include a duplexer, or may include two sub-filters. In this embodiment, the specific form of the third filter unit 310, the fourth filter unit 320, and the fifth filter unit is not specifically limited.

[0073] It should be understood that the channel where the third low-noise amplifier 301 is located is the second receiving channel Rx2, the channel where the fourth low-noise amplifier 302 is located is a third receiving channel Rx3, the channel where the fifth low-noise amplifier 303 is located is another third receiving channel Rx3, and the channel where the sixth low-noise amplifier 304 is located is yet another third receiving channel Rx3.

[0074] The third switching unit 340 is used to select and connect the three filtered first target signals to the three low-noise amplifiers, and to connect the one filtered second target signal to the remaining low-noise amplifier. The three low-noise amplifiers are three of the following: third low-noise amplifier 301, fourth low-noise amplifier 302, fifth low-noise amplifier 303, and sixth low-noise amplifier 304. The remaining low-noise amplifier is any low-noise amplifier other than the aforementioned three. The third switching unit 340 can select and connect three receiving channels in the first target receiving channel group and one receiving channel in the second target receiving channel group.

[0075] In this embodiment, each of the four receiving channels configured in the RF receiving module 30 is equipped with a low-noise amplifier. However, by setting the third switching unit 340, only three filtering units (e.g., the third filtering unit 310, the fourth filtering unit 320, and the fifth filtering unit 330) are set, instead of four filtering units. This allows each receiving channel to filter and amplify the received first and second RF signals with low noise, reducing costs and space usage without affecting the RF system's receiving performance.

[0076] like Figure 4 As shown, in an exemplary embodiment, the third filtering unit 310 includes a first duplexer 311, the fourth filtering unit 320 includes a second duplexer 321, and the fifth filtering unit 330 includes a third duplexer 331.

[0077] The third switching unit 340 includes a first sub-switching unit 341 and a second sub-switching unit 342. For example, the first sub-switching unit 341 may be a double-pole multi-throw switch, or it may include multiple single-pole double-throw switches. The second sub-switching unit 342 may be a double-pole multi-throw switch, or it may include multiple single-pole double-throw switches.

[0078] The first signal terminal of the first duplexer 311 is connected to a second terminal of the first sub-switch unit 341, the second signal terminal of the first duplexer is connected to a second terminal of the second sub-switch unit 342, and the common terminal of the first duplexer 311 is connected to the switch module 40.

[0079] The first signal terminal of the second duplexer 321 is connected to another second terminal of the first sub-switch unit 341, the second signal terminal of the second duplexer 321 is connected to yet another second terminal of the first sub-switch unit 341, and the common terminal of the second duplexer 321 is connected to the switch module 40.

[0080] The first signal terminal of the third duplexer 331 is connected to another second terminal of the first sub-switch unit 341, the second signal terminal of the third duplexer 331 is connected to another second terminal of the second sub-switch unit 342, and the common terminal of the third duplexer 331 is connected to the switch module 40.

[0081] In this embodiment, the three filtering units in the RF receiving module 30 (e.g., the third filtering unit 310, the fourth filtering unit 320, and the fifth filtering unit 330) are all duplexers, which can support filtering and isolation processing of the first RF signal and the second RF signal. The common terminal of the duplexer can be used as the second terminal of each filtering unit. Compared with setting multiple filters, the number of terminals of the second terminal of each filtering unit can be reduced, thereby simplifying the number of terminals of the switching module 40 connected to the second terminal of each filtering unit. This can increase the occupied area of ​​the RF receiving module 30 and simplify the number of terminals of the switching module 40, reducing its occupied area.

[0082] In one exemplary embodiment, its radio frequency front-end module 20 may include a radio frequency receiving device. The radio frequency receiving device is a diversity receiving device, such as, but not limited to, an FEM device containing multiple low-noise amplifiers, multiple filters, multiple switches, and other components. For example, a third low-noise amplifier 301, a fourth low-noise amplifier 302, a fifth low-noise amplifier 303, a sixth low-noise amplifier 304, and a third switching unit 340 are all integrated within this radio frequency receiving device.

[0083] In an optional embodiment, at least one of the third filtering unit 310, the fourth filtering unit 320, and the fifth filtering unit 330 is built into the radio frequency receiving device. In an exemplary embodiment, the third filtering unit 310 is built into the radio frequency receiving device, while the fourth filtering unit 320 and the fifth filtering unit 330 are external to the radio frequency receiving device.

[0084] Please continue to refer to this. Figure 4 For ease of explanation, the filtering unit built into the RF receiver is referred to as the built-in filtering unit. When the RF receiver has a built-in filtering unit, it may also include a fourth switching unit 350. The first terminal of the fourth switching unit 350 can be connected to the second terminal of the built-in filtering unit, and the second terminal of the fourth switching unit 350 is connected to the switching module 40 via the antenna port of the RF receiver.

[0085] like Figure 5As shown, for example, the switch module 40 may include a first switch module 410 and a second switch module 420, wherein both the first switch module 410 and the second switch module 420 may be 3P3T switches. Specifically, a first terminal of the first switch module 410 is connected to the first antenna port of the RF front-end module 20, another first terminal of the first switch module 410 is connected to the common terminal of the second duplexer 321, yet another first terminal of the first switch module 410 is connected to a second terminal of the second switch module 420, the two second terminals of the first switch module 410 are respectively connected to the first antenna ANT1 and the second antenna ANT2, and yet another second terminal of the first switch module 410 is connected to a first terminal of the second switch module 40.

[0086] Another first terminal of the second switch module 420 is connected to the common terminal of the third duplexer 331, another second terminal of the second switch module 420 is connected to the antenna port of the radio frequency receiving module 30, and the other two second terminals of the second switch module 420 are respectively connected to the third antenna ANT3 and the fourth antenna ANT4.

[0087] By controlling the on / off states of the first switch module 410 and the second switch module 420, the path between the first target receiving channel group and the four antennas, as well as the path between the second target receiving channel group and any two antennas, can be opened to support four-way reception of the first target signal and dual-way reception of the second target signal, thereby improving the carrier aggregation capability and reception performance of the first and second radio frequency signals. In addition, by controlling the on / off states of the first switch module 410 and the second switch module 420, the path between the first transmitting channel and any antenna can also be opened to support alternating transmission of the radio frequency signal and the second radio frequency signal among the four antennas, thereby improving the transmission performance of the radio frequency system.

[0088] In an optional embodiment, the fourth switching unit 350 in the RF receiver can be omitted. The RF receiver can be configured with multiple antenna ports, and the second end of each built-in filter unit can be connected to the switching module 40 via an antenna port. In practical applications, the specific switching types of the first switching module 410 and the second switching module 420 included in the switching module 40 can be set according to the number of antenna ports of the RF receiver. In this embodiment, the specific switching types of the first switching module 410 and the second switching module 420 are not limited, nor are they limited to the examples described above.

[0089] In this embodiment, the radio frequency receiving module 30 is a radio frequency receiving device. Its third low noise amplifier 301, fourth low noise amplifier 302, fifth low noise amplifier 303, sixth low noise amplifier 304 and third switching unit 340 are all built into the radio frequency receiving device. That is, the radio frequency front-end device is a radio frequency chip, which can improve the integration of the radio frequency front-end module 20, reduce the space occupied by the radio frequency system, and facilitate the miniaturization of the radio frequency system.

[0090] In an exemplary embodiment, based on any of the foregoing embodiments, the first receiving channel Rx1, the second receiving channel Rx2, and the third receiving channel Rx3 are further used to support the reception and processing of a third radio frequency signal. The first, second, and third radio frequency signals have different frequency bands. For example, the first and second radio frequency signals may be intermediate frequency signals of different sub-bands, and the third radio frequency signal may be a high-frequency signal, such as a B41 / B40 band signal or an N41 / N40 band signal.

[0091] For example, the first radio frequency receiving channel may include a first sub-receiving channel and a second sub-receiving channel. Each sub-receiving channel may be equipped with a low-noise amplifier. For instance, the first sub-receiving channel may be equipped with a first low-noise amplifier 240 to support amplification of the first radio frequency signal and the second radio frequency signal. The second sub-receiving channel may be equipped with a second low-noise amplifier 250 to support amplification of the third radio frequency signal.

[0092] The low-noise amplifiers on the second receiving channel Rx2 and the third receiving channel Rx3 can respectively support the amplification of the first radio frequency signal, the second radio frequency signal, and the third radio frequency signal.

[0093] The switch module 40 is used to select and connect the paths between the four antennas and the first target receiving channel group respectively, so as to support four-way reception of the third target signal, and to select and connect the paths between any two antennas and the third target receiving channel group, so as to support two-way reception of the fourth target signal. One of the third target signal and the fourth target signal is a first radio frequency signal or a second radio frequency signal, and the other is a third radio frequency signal.

[0094] The radio frequency system in this embodiment can not only support four-way reception of the first target signal and two-way reception of the second target signal, but also support four-way reception of the third target signal and two-way reception of the fourth target signal. The addition of carrier aggregation combination can further improve the reception performance of radio frequency signals.

[0095] In an exemplary embodiment, based on the aforementioned RF front-end module 20, its third filtering unit 310, fourth filtering unit 320, and fifth filtering unit 330 are used to filter out spurious signals to allow isolated output of the first RF signal, the second RF signal, and the third RF signal. It should be understood that the third filtering unit 310, the fourth filtering unit 320, and the fifth filtering unit 330 can all support isolated filtering processing of the first RF signal, the second RF signal, and the third RF signal.

[0096] Among them, the third low-noise amplifier 301, the fourth low-noise amplifier 302, the fifth low-noise amplifier 303 and the sixth low-noise amplifier 304 can support the amplification of the first radio frequency signal and the second radio frequency signal, as well as the amplification of the third radio frequency signal.

[0097] The third switching unit 340 can selectively connect the third filtering unit 310, the fourth filtering unit 320 and the fifth filtering unit 330 to the third low-noise amplifier 301, the fourth low-noise amplifier 302, the fifth low-noise amplifier 303 and the sixth low-noise amplifier 304, respectively.

[0098] In one exemplary embodiment, the third filtering unit 310, the fourth filtering unit 320, and the fifth filtering unit 330, in addition to the aforementioned duplexer, each include a filter. The filter is used to filter out spurious signals to allow the third radio frequency signal to pass through.

[0099] Please continue to refer to this. Figure 4 For ease of explanation, the example given is that the third filter unit 310 is built into the RF receiver, while the fourth filter unit 320 and the fifth filter unit 330 are external to the RF receiver.

[0100] The radio frequency receiver device incorporates a third low-noise amplifier 301, a fourth low-noise amplifier 302, a fifth low-noise amplifier 303, a sixth low-noise amplifier 304, a third switching unit 340, and a fourth switching unit 350.

[0101] The first end of the filter 312 of the third filter unit is connected to the other second end of the second sub-switch unit 342, and the second end of the filter 312 of the third filter unit is connected to the fourth switch unit 350.

[0102] The first end of the filter 322 of the fourth filter unit is connected to another second end of the first sub-switch unit 341, and the second end of the filter 322 of the fourth filter unit is connected to the common end of the second duplexer 321.

[0103] The first end of the filter 332 of the fifth filter unit is connected to another second end of the second sub-switch unit 342, and the second end of the filter 332 of the fifth filter unit is connected to the common end of the third duplexer 331.

[0104] The first terminals of the fourth switching unit 350 are respectively connected to the common terminal of the filter 312 of the third filtering unit and the first duplexer 311, and the second terminal of the fourth switching unit 350 is connected to the switching module 40.

[0105] For example, the first sub-switch unit 341 and the second sub-switch unit 342 each include three switching switches, such as a first switching switch, a second switching switch, and a third switching switch. The first switching switch, the second switching switch, and the third switching switch are all single-pole multi-throw switches.

[0106] The S-terminal of the first switching switch in the first sub-switching unit 341 is connected to the input terminal of the third low-noise amplifier 301. The four T-terminals of the first switching switch are respectively connected to the first signal terminal of the second duplexer 321, the second signal terminal of the second duplexer 321, the filter 322 of the fourth filtering unit, and one T-terminal of the second switching switch in the first sub-switching unit 341. The S-terminal of the second switching switch in the first sub-switching unit 341 is connected to the second signal terminal of the third duplexer 331. The other T-terminal of the second switching switch in the first sub-switching unit 341 is connected to one T-terminal of the third switching switch in the first sub-switching unit 341. The other T-terminal of the third switching switch in the first sub-switching unit 341 is connected to the first signal terminal of the first duplexer. The S-terminal of the third switching switch in the first sub-switching unit 341 is connected to the input terminal of the fourth low-noise amplifier 302.

[0107] The S-terminal of the first switch in the second sub-switch unit 342 is connected to the input terminal of the fifth low-noise amplifier 303. The two T-terminals of the first switch are respectively connected to the second signal terminal of the first duplexer, the filter 322 of the fourth filter unit, and one T-terminal of the second switch in the second sub-switch unit 342. The S-terminal of the second switch in the second sub-switch unit 342 is connected to the filter 322 of the fourth filter unit, and the other T-terminal of the second switch in the second sub-switch unit 342 is connected to one T-terminal of the third switch in the second sub-switch unit 342. The other two T-terminals of the third switch in the first sub-switch unit 341 are respectively connected to the second signal terminal of the third duplexer 331 and the filter 312 of the third filter unit. The S-terminal of the third switch in the first sub-switch unit 341 is connected to the input terminal of the sixth low-noise amplifier 304.

[0108] In an optional embodiment, the RF receiving module 30 may further include multiple filters 360 with bandpasses. These bandpasses include, but are not limited to, multiple sub-bands in the mid-frequency band and multiple sub-bands in the high-frequency band. The first terminal of each filter 360 is connected to the third switching unit 340, and the second terminal of each filter 360 is connected to the fourth switching unit 350. Thus, the RF receiving module 30 can also support the reception performance of RF signals in different frequency bands. In practical applications, the specific switching types of the third switching unit 340 and the fourth switching unit 350 can be designed based on the various filters 360 and the first duplexer 311 included in the RF receiving device, and are not limited to the examples described in this application.

[0109] In this embodiment, by controlling the on / off states of the three switching switches included in the first sub-switch unit 341 and the second sub-switch unit 342, the receiving channels for three first target signals and second target signals can be simultaneously activated. Together with the RF front-end module 20, it can support the simultaneous reception of four first target signals and two second target signals. Alternatively, it can simultaneously activate the receiving channels for three third target signals and one fourth target signal, and the RF front-end module 20 can support the simultaneous reception of four third target signals and two fourth target signals. For example, the RF system can support carrier aggregation capability for at least three combined frequency bands, which may include: B1 and B3; B1 and B41; B3 and B41. Each combined frequency band can support four receptions in one band and two receptions in another band, resulting in a significant improvement in carrier aggregation capability.

[0110] Based on any of the foregoing embodiments, the RF front-end module 20 can also support the reception and transmission processing of a third RF signal. The RF front-end module 20 includes a first transmission channel and a second transmission channel. The second transmission channel is connected to the RF transceiver 10 and the switch module 40, respectively, and is used to support the transmission of the third RF signal.

[0111] The second transmission channel is equipped with at least one power amplifier to support power amplification of the third radio frequency signal. The third radio frequency signal can be a single-frequency signal or can include multiple sub-radio frequency signals in different sub-bands. For example, the third radio frequency signal may include, but is not limited to, signals in the B40 and B41 bands. If the third radio frequency signal includes multiple sub-radio frequency signals in different sub-bands, and the second transmission channel has multiple transmission branches, each transmission branch can reuse the same power amplifier, and each transmission branch has a different passband frequency.

[0112] The switch module 40 is also used to select the path between the first and second transmission channels and the four antennas, respectively, to support the alternating transmission of the third target signal and the fourth target signal among the four antennas.

[0113] In this embodiment, the RF front-end module 20 is equipped with two transmit channels and two first receive channels Rx1, which can support dual-channel transmission and dual-channel reception of the third target signal and the fourth target signal, respectively, to realize dual-SIM dual-standby or dual-SIM dual-pass combinations of different frequency band combinations (e.g., n / B1+n / B3, n / B3+n / B41 or n / B1+n / B41), thereby improving the communication performance of the dual SIM cards. In addition, by controlling the on / off state of the switch module 40, the switching of the third target signal and the fourth target signal between the four antennas can also be realized, thereby improving the RF system's support for the transmission and reception of the third target signal and the fourth target signal, and thus improving its communication quality.

[0114] like Figure 6 and Figure 7 As shown, in an exemplary embodiment, based on the radio frequency transceiver device 201 in any of the foregoing embodiments, the radio frequency transceiver device 201 further includes: a second power amplifier 260, a second filter unit 270, and a second switching unit 280.

[0115] The second power amplifier 260, connected to the RF transceiver 10, is used to support power amplification of the third RF signal.

[0116] The first terminal of the second filtering unit 270 is connected to the output terminal of the second power amplifier 260 to support filtering of spurious waves other than the third radio frequency signal. The second filtering unit 270 is also connected to the first low-noise amplifier 240 or the second low-noise amplifier 250.

[0117] For example, the second filtering unit 270 may include at least one sub-filter, each sub-filter supporting filtering of a sub-radio frequency signal.

[0118] The first terminals of the second switching unit 280 are respectively connected to the second terminals of the first filtering unit 230 and the second filtering unit 270, and the two second terminals of the second switching unit 280 are respectively connected to the first antenna port and the second antenna port of the radio frequency transceiver device 201. The first antenna port and the second antenna port are respectively connected to the switching module 40; wherein, the second switching unit 280 is used to select and conduct the path between any antenna port and any filtering unit.

[0119] The RF transceiver 10 device, in conjunction with the aforementioned embodiments, supports multiple-channel reception of the first, second, and third RF signals by the RF receiving module 30. It can support four-channel reception of the third target signal, and select and conduct any two antennas to the path between the third target receiving channel group to support two-channel reception of the fourth target signal. It can also switch between the third and fourth target signals for dual-channel transmission between the four antennas. It can realize dual-SIM dual-standby or dual-SIM dual-pass of different combination frequency bands (e.g., n / B1+n / B3, n / B3+n / B41 or n / B1+n / B41), thereby improving the communication performance of dual SIM cards.

[0120] In one exemplary embodiment, this application also provides a communication device, including a first antenna ANT1, a second antenna ANT2, a third antenna ANT3, a fourth antenna ANT4, and a radio frequency system in any of the above embodiments.

[0121] In one exemplary embodiment, a communication device is provided, which may be a terminal, and its internal structure diagram may be as follows. Figure 8 As shown, the computer device includes a processor, memory, input / output interfaces, a communication interface, a display unit, and an input device. The processor, memory, and input / output interfaces are connected via a system bus, and the communication interface, display unit, and input device are also connected to the system bus via the input / output interfaces. The processor provides computing and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs stored in the non-volatile storage media. The input / output interfaces are used for exchanging information between the processor and external devices. The communication interface is used for wired or wireless communication with external terminals; wireless communication can be achieved through Wi-Fi, mobile cellular networks, Near Field Communication (NFC), or other technologies. When the computer program is executed by the processor, it implements a coexistence communication method. The display unit is used to form a visually visible image and can be a display screen, a projection device, or a virtual reality imaging device. The display screen can be an LCD screen or an e-ink screen. The input device of the computer device can be a touch layer covering the display screen, or buttons, trackballs, or touchpads set on the casing of the computer device, or external keyboards, touchpads, or mice, etc.

[0122] Those skilled in the art will understand that Figure 8The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0123] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0124] The above embodiments are merely illustrative of several implementation methods of this application, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A radio frequency system, characterized in that, include: The radio frequency transceiver is configured with a first radio frequency channel group and a second radio frequency channel group, wherein each radio frequency channel group includes three radio frequency channels; The radio frequency front-end module includes two first receiving channels, which are respectively connected to two radio frequency channels of the first radio frequency channel group. The radio frequency (RF) receiving module includes a second receiving channel and three third receiving channels. The second receiving channel is connected to the remaining RF channel of the first RF channel group, and the three third receiving channels are respectively connected to the three RF channels of the second RF channel group. The first receiving channel, the second receiving channel, and the third receiving channels are used to support the reception and processing of a first RF signal and a second RF signal, respectively. A switching module, wherein multiple first terminals of the switching module are respectively connected to each of the first receiving channels and each of the second receiving channels, and multiple second terminals of the switching module are respectively connected to four antennas; wherein... The switching module is used to select and connect the paths between the four antennas and the first target receiving channel group respectively, so as to support four-way reception of the first target signal, and to select and connect the paths between any two antennas and the second target receiving channel group, so as to support two-way reception of the second target signal; the first target receiving channel group includes one first receiving channel, a second receiving channel and two third receiving channels, the second target receiving channel group includes another first receiving channel and another third receiving channel, the first radio frequency signal and the second radio frequency signal have different frequency bands; one of the first target signal and the second target signal is the first radio frequency signal and the other is the second radio frequency signal.

2. The radio frequency system according to claim 1, characterized in that, The switching module is also used to select and connect the path between the third target receiving channel group and the four antennas to support four-way reception of the target radio frequency signal. The third target receiving channel group includes any one of the first receiving channels and three of the third receiving channels. The target radio frequency signal includes the first radio frequency signal or the second radio frequency signal.

3. The radio frequency system according to claim 1, characterized in that, The radio frequency front-end module also includes: The first transmission channel is connected to the radio frequency transceiver and the switch module respectively, and is used to support the transmission of the first radio frequency signal and the second radio frequency signal; The switch module is also used to select and connect the transmission channel to the four antennas respectively, so as to support the alternating transmission of the first radio frequency signal and the second radio frequency signal among the four antennas.

4. The radio frequency system according to claim 3, characterized in that, The radio frequency front-end module is a radio frequency transceiver device, which includes: A first power amplifier, connected to the radio frequency transceiver, is used to support power amplification of the first radio frequency signal and the second radio frequency signal; A first switching unit, wherein a first terminal of the first switching unit is connected to the output terminal of the first power amplifier; A first filtering unit has multiple first terminals that are respectively connected to multiple second terminals of the first switching unit, and the second terminals of the first filtering unit are connected to the switching module via the first antenna port of the radio frequency transceiver device; the first filtering unit is used to filter out spurious waves to allow isolated output of the first radio frequency signal and the second radio frequency signal; The first low-noise amplifier has its input terminal connected to a first terminal of the first filter unit, and its output terminal connected to a radio frequency channel of the first radio frequency channel group of the radio frequency transceiver via a first receiving port of the radio frequency transceiver. The first low-noise amplifier is used to amplify the first radio frequency signal after filtering. The second low-noise amplifier has its input terminal connected to the other first terminal of the first filter unit, and its output terminal connected to another RF channel of the first RF channel group of the RF transceiver via the second receiving port of the RF transceiver. The second low-noise amplifier is used to amplify the filtered second RF signal. One of the first receiving channels is equipped with the first filter unit and the first low-noise amplifier, respectively; the other of the first receiving channels is equipped with the first filter unit and the second low-noise amplifier, respectively.

5. The radio frequency system according to claim 4, characterized in that, The first receiving channel, the second receiving channel, and the third receiving channel are also respectively used to support the receiving and processing of the third radio frequency signal; The switching module is used to select and connect the paths between the four antennas and the first target receiving channel group respectively to support four-way reception of the third target signal, and to select and connect any two antennas and the third target receiving channel group to support two-way reception of the fourth target signal; one of the third target signal and the fourth target signal is the first radio frequency signal or the second radio frequency signal, and the other is the third radio frequency signal; The radio frequency front-end module also includes: The second transmission channel is connected to the radio frequency transceiver and the switch module respectively, and is used to support the transmission of the third radio frequency signal; The switching module is also used to select and connect the first transmission channel and the second transmission channel to the four antennas respectively, so as to support the alternating transmission of the third target signal and the fourth target signal among the four antennas.

6. The radio frequency system according to claim 5, characterized in that, The radio frequency transceiver device further includes: A second power amplifier, connected to the radio frequency transceiver, is used to support power amplification of the third radio frequency signal; The second filtering unit, with its first end connected to the output end of the second power amplifier, is used to support filtering of spurious waves other than the third radio frequency signal. The second switching unit has multiple first terminals connected to the second terminals of the first filtering unit and the second filtering unit, respectively, and two second terminals connected to the first antenna port and the second antenna port of the radio frequency transceiver device, respectively. The first antenna port and the second antenna port are respectively connected to the switching module. The second switching unit is used to select and conduct the path between any antenna port and any of the filtering units.

7. The radio frequency system according to any one of claims 1-6, characterized in that, The radio frequency receiving module includes: The third low-noise amplifier, whose output terminal is the output terminal of the second receiving channel, is used to support the amplification processing of the first radio frequency signal and the second radio frequency signal; The fourth low-noise amplifier, the output of which is the output of the third receiving channel, is used to support the amplification of the first radio frequency signal and the second radio frequency signal; The fifth low-noise amplifier, the output of which is the output of another third receiving channel, is used to support amplification processing of the first radio frequency signal and the second radio frequency signal; The sixth low-noise amplifier, the output of which is the output of another of the third receiving channels, is used to support the amplification of the first radio frequency signal and the second radio frequency signal; The third switching unit has multiple first terminals that are respectively connected to the input terminals of the third low-noise amplifier, the fourth low-noise amplifier, the fifth low-noise amplifier, and the sixth low-noise amplifier. The third filtering unit has multiple first terminals that are respectively connected to multiple second terminals of the third switching unit, and the second terminals of the third filtering unit are connected to the switching module. The fourth filtering unit has multiple first terminals that are respectively connected to multiple second terminals of the third switching unit, and the second terminals of the fourth filtering unit are connected to the switching module. The fifth filtering unit has multiple first terminals that are respectively connected to multiple second terminals of the third switching unit, and the second terminals of the fifth filtering unit can be respectively connected to the switching module. The third, fourth, and fifth filtering units are used to filter out spurious waves to allow isolated output of the first and second radio frequency signals. The third switching unit is used to select and connect the three filtered first target signals to the three low-noise amplifiers, and to connect the filtered second target signal to the remaining low-noise amplifier. The three low-noise amplifiers are three of the third, fourth, fifth, and sixth low-noise amplifiers.

8. The radio frequency system according to claim 7, characterized in that, The third filtering unit includes a first duplexer, the fourth filtering unit includes a second duplexer, and the fifth filtering unit includes a third duplexer. The third switching unit includes a first sub-switching unit and a second sub-switching unit; wherein... The first signal terminal of the first duplexer is connected to a second terminal of the first sub-switch unit, the second signal terminal of the first duplexer is connected to a second terminal of the second sub-switch unit, and the common terminal of the first duplexer is connected to the switch module. The first signal terminal of the second duplexer is connected to another second terminal of the first sub-switch unit, the second signal terminal of the second duplexer is connected to yet another second terminal of the first sub-switch unit, and the common terminal of the second duplexer is connected to the switch module. The first signal terminal of the third duplexer is connected to another second terminal of the first sub-switch unit, the second signal terminal of the third duplexer is connected to another second terminal of the second sub-switch unit, and the common terminal of the third duplexer is connected to the switch module.

9. The radio frequency system according to claim 8, characterized in that, The third filtering unit, the fourth filtering unit, and the fifth filtering unit are used to filter out spurious waves to allow isolated output of the first radio frequency signal, the second radio frequency signal, and the third radio frequency signal; The third, fourth, fifth, and sixth low-noise amplifiers are also used to support amplification of the third radio frequency signal.

10. The radio frequency system according to claim 9, characterized in that, The third filtering unit, the fourth filtering unit, and the fifth filtering unit each include a filter; the filter is used to filter out spurious waves to allow the third radio frequency signal to pass through; The radio frequency receiving module may further include: The fourth switching unit has multiple first terminals connected to the filter of the third filtering unit and the common terminal of the first duplexer, respectively, and the second terminal of the fourth switching unit is connected to the switching module. The first end of the filter of the third filtering unit is connected to the other second end of the second sub-switching unit, and the second end of the second sub-filter of the third filtering unit is connected to the second sub-switching unit. The first end of the filter of the fourth filter unit is connected to another second end of the first sub-switch unit, and the second end of the filter of the fourth filter unit is connected to the common end of the second duplexer. The first end of the filter of the fifth filter unit is connected to another second end of the second sub-switch unit, and the second end of the filter of the fifth filter unit is connected to the common end of the third duplexer.

11. The radio frequency system according to claim 10, characterized in that, The radio frequency receiving module includes a radio frequency receiving device, and the fourth filtering unit and the fifth filtering unit are external to the radio frequency receiving device.

12. The radio frequency system according to claim 1, characterized in that, The first radio frequency signal and the second radio frequency signal are respectively intermediate frequency signals, or one of the first radio frequency signal and the second radio frequency signal is an intermediate frequency signal, and the other of the first radio frequency signal and the second radio frequency signal is a high frequency signal.

13. The radio frequency system according to claim 5, characterized in that, The first radio frequency signal and the second radio frequency signal are intermediate frequency signals, respectively, and the third radio frequency signal is a high frequency signal.

14. A communication device, characterized in that, It includes a first antenna, a second antenna, a third antenna, a fourth antenna, and a radio frequency system as described in any one of claims 1-13.

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