Radio-frequency circuit, radio-frequency front-end device, radio-frequency system and communication device

Abstract

A radio-frequency circuit, comprising a power amplifier unit (11), a switch unit (12) and a low-noise amplifier unit (13), wherein a first output end of the power amplifier unit (11) is connected to a first antenna group (20), and a second output end of the power amplifier unit (11) is connected to one first end of the switch unit (12); an input end of the low-noise amplifier unit (13) is connected to the other first end of the switch unit (12); a second end of the switch unit (12) is connected to the first antenna group (20); and in a downlink time slot of a radio-frequency signal, the switch unit (12) is used for turning on a path between the first antenna group (20) and the low-noise amplifier unit (13) and turning off a path between the first antenna group (20) and the second output end, and the power amplifier unit (11) is used for transmitting a power-amplified radio-frequency signal to the first antenna group (20) by means of the first output end.

Description

RF circuits, RF front-end devices, RF systems and communication equipment

[0001] Related applications

[0002] This application claims priority to Chinese patent application filed on March 17, 2025, with application number 2025103203631 and entitled "Radio Frequency Circuits, Radio Frequency Front-End Devices, Radio Frequency Systems and Communication Equipment", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of radio frequency technology, and in particular to a radio frequency circuit, a radio frequency front-end device, a radio frequency system, and a communication device. Background Technology

[0004] The statements herein are provided only as background information in connection with this application and do not necessarily constitute prior art.

[0005] With the development of communication technology, more and more communication devices are being used in people's daily lives. These devices include mobile phones, smartwatches, tablets, and more. However, there is still room for improvement in the communication performance of existing devices. Summary of the Invention

[0006] According to various embodiments of this application, a radio frequency circuit, a radio frequency front-end device, a radio frequency system, and a communication device are provided.

[0007] In a first aspect, embodiments of this application provide a radio frequency (RF) circuit, which includes a power amplification unit, a switching unit, and a low-noise amplification unit; wherein...

[0008] The first output terminal of the power amplifier unit is used to connect to the first antenna group, and the second output terminal of the power amplifier unit is connected to a first terminal of the switching unit. The power amplifier unit is used to support power amplification processing of radio frequency signals.

[0009] The input terminal of the low-noise amplifier unit is connected to the other first terminal of the switching unit to support low-noise amplification processing of the radio frequency signal.

[0010] The second end of the switching unit is connected to the first antenna group; wherein...

[0011] During the downlink time slot of the radio frequency signal, the switching unit is used to open the path between the first antenna group and the low noise amplification unit, and to close the path between the first antenna group and the second output terminal. The power amplification unit is used to transmit the power-amplified radio frequency signal to the first antenna group through the first output terminal.

[0012] Secondly, embodiments of this application provide a radio frequency (RF) front-end device, which is configured with a first RF input port, an RF output port, an auxiliary port, and an antenna port; the RF front-end device includes the RF circuit described above; wherein...

[0013] The first RF input port is connected to the input terminal of the power amplifier unit in the RF circuit, the auxiliary port is connected to the first output terminal of the power amplifier unit, the auxiliary port is used to connect to the first antenna group, the RF output port is connected to the output terminal of the low noise amplifier unit in the RF circuit, the antenna port is connected to the second terminal of the switching unit in the RF circuit, and the antenna port is used to connect to the first antenna group.

[0014] Thirdly, embodiments of this application provide a radio frequency system, including a radio frequency transceiver, a first antenna group, and a radio frequency front-end device as described above, wherein the radio frequency transceiver is connected to a first radio frequency input port and a radio frequency output port of the radio frequency front-end device, and the radio frequency transceiver is used to support the transmission and reception of radio frequency signals.

[0015] Fourthly, embodiments of this application provide a communication device, which includes the radio frequency system described above.

[0016] Details of one or more embodiments of this application are set forth in the following drawings and description. Other features, objects, and advantages of this application will become apparent from the specification, drawings, and claims. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology 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.

[0018] Figure 1 is a schematic diagram of the structure of a radio frequency circuit and a first antenna group according to one embodiment;

[0019] Figure 2 is a timing diagram of the downlink time slot in the cross-connect split-duplex mode of an embodiment;

[0020] Figure 3 is a timing diagram of the downlink time slot in a time-division duplex mode according to an embodiment;

[0021] Figure 4 is a second schematic diagram of the structure of a radio frequency circuit and a first antenna group according to an embodiment;

[0022] Figure 5 is a third schematic diagram of the structure of a radio frequency circuit and a first antenna group according to an embodiment;

[0023] Figure 6 is a fourth schematic diagram of the structure of a radio frequency circuit and a first antenna group according to an embodiment;

[0024] Figure 7 is a schematic diagram of the architecture of a multi-way switch according to an embodiment;

[0025] Figure 8 is a schematic diagram of the architecture of a digitally tunable filter according to an embodiment;

[0026] Figure 9 is a frequency band diagram of uplink and downlink coexistence interference in one embodiment;

[0027] Figure 10 is a schematic diagram of the structure of a radio frequency system according to one embodiment;

[0028] Figure 11 is a second schematic diagram of the structure of a radio frequency system according to an embodiment;

[0029] Figure 12 is a third schematic diagram of the structure of a radio frequency system according to an embodiment;

[0030] Figure 13 is a fourth schematic diagram of the structure of a radio frequency system according to an embodiment;

[0031] Figure 14 is a fifth schematic diagram of the structure of an embodiment of a radio frequency system;

[0032] Figure 15 is a schematic diagram of the structure of a radio frequency system according to an embodiment;

[0033] Figure 16 is a schematic diagram of the structure of a communication device according to an embodiment.

[0034] Explanation of reference numerals in the attached figures:

[0035] 10. Radio frequency circuit; 11. Power amplifier unit; 111. First power amplifier; 112. First switch; 12. Switching unit; 13. Low noise amplifier unit; 14. First filter unit; 15. Second filter unit; 20. First antenna group; 21. First antenna; 22. Second antenna; 23. Third antenna; 30. Radio frequency front-end device; 311. First radio frequency input port; 312. Second radio frequency input port; 32. Radio frequency output port; 33. Auxiliary port; 4. Antenna port; 341. First antenna port; 342. Second antenna port; 40. RF transceiver; 50. Receiving circuit; 51. Low noise amplifier module; 52. First filter module; 53. Second filter module; 60. Second antenna group; 90. Mobile phone; 91. Memory; 911. Operating system; 912. Communication module; 913. GPS module; 92. Processing circuit; 93. I / O subsystem; 931. Button; 94. Antenna device; 95. Signal line. Detailed Implementation

[0036] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0038] 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 antenna may be referred to as a second antenna, and similarly, a second antenna may be referred to as a first antenna. Both the first antenna and the second antenna are antennas, but they are not the same antenna.

[0039] It is understood that the term "connection" in the following embodiments should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have electrical signal or data transmission with each other.

[0040] It is understandable that "at least one" refers to one or more, and "multiple" refers to two or more. "At least a part of an element" refers to part or all of an element.

[0041] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising / including” or “having,” etc., specify the presence of the stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. Meanwhile, the term “and / or” as used in this specification includes any and all combinations of the associated listed items.

[0042] The radio frequency system involved in the embodiments of this 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 (UE) (e.g., mobile phones), mobile stations (MS), etc.

[0043] In some embodiments, as shown in FIG1, an RF circuit 10 is provided, which includes a power amplifier unit 11, a switching unit 12 and a low noise amplifier unit 13.

[0044] The first output terminal of the power amplifier unit 11 is used to connect to the first antenna group 20. The first antenna group 20 includes at least one antenna that supports the transmission and reception of radio frequency (RF) signals. The first output terminal of the power amplifier unit 11 is used to connect to at least a portion of the antennas in the first antenna group 20. The second output terminal of the power amplifier unit 11 is connected to a first terminal of the switching unit 12. The power amplifier unit 11 is used to support power amplification processing of the RF signal, wherein the RF signal can be any suitable frequency band signal, without limitation herein.

[0045] The input terminal of the low-noise amplifier unit 13 is connected to the other first terminal of the switching unit 12. The low-noise amplifier unit 13 is used to support low-noise amplification processing of the radio frequency signal received by the first antenna group 20, wherein the radio frequency signal received by the first antenna group 20 can be a signal of any suitable frequency band, which is not limited here.

[0046] The second terminal of the switching unit 12 is connected to the first antenna group 20. Specifically, the second terminal of the switching unit 12 is connected one-to-one with each antenna in the first antenna group 20. The switching unit 12 may include a single-pole single-throw switch (SPST), a single-pole multi-throw switch (SPnT), or a multi-pole multi-throw switch (nPnT). The switching unit 12 may also include a combination of multiple switching devices; the specific configuration can be determined according to the actual scenario and is not limited here. The switching unit 12 is used to select and connect the second output terminals of the low-noise amplifier unit 13 and the power amplifier unit 11 to the first antenna group 20.

[0047] In the downlink (DL) time slot of the radio frequency signal, the switching unit 12 is used to open the path between the first antenna group 20 and the low noise amplification unit 13, and to close the path between the first antenna group 20 and the second output terminal of the power amplification unit 11. The power amplification unit 11 is used to transmit the amplified radio frequency signal to the first antenna group 20 through the first output terminal, and the antenna in the first antenna group 20 transmits the radio frequency signal. The low noise amplification unit 13 is used to perform low noise amplification processing on the radio frequency signal received by the first antenna group 20, thereby supporting the simultaneous transmission and reception of radio frequency signals.

[0048] During the uplink time slot of the radio frequency signal, the switching unit 12 is used to open the path between the first antenna group 20 and the second output terminal of the power amplifier unit 11, and to close the path between the first antenna group 20 and the low noise amplifier unit 13. The power amplifier unit 11 is used to transmit the power-amplified radio frequency signal through the second output terminal to the first antenna group 20 via the switching unit 12, and the first antenna group 20 transmits the radio frequency signal, thereby realizing the transmission of the radio frequency signal.

[0049] For ease of description, the path containing the first antenna group 20, the switching unit 12, and the low-noise amplifier unit 13 is referred to as the receiving path, the path containing the first output terminal of the power amplifier unit 11 and the first antenna group 20 is referred to as the first transmitting path, and the path containing the second output terminal of the power amplifier unit 11, the switching unit 12, and the first antenna group 20 is referred to as the second transmitting path.

[0050] During at least a portion of the downlink time slot, both the receiving path and the first transmitting path are in an on state, while the second transmitting path is in an off state. In this case, the receiving path supports the reception of radio frequency signals, and the first transmitting path supports the transmission of radio frequency signals, enabling the radio frequency circuit 10 to support simultaneous transmission and reception of radio frequency signals. During the remaining portion of the downlink time slot, the receiving path is in an on state, while both the first and second transmitting paths are in an off state. In this case, the receiving path supports the reception of radio frequency signals, enabling the radio frequency circuit 10 to support the reception of radio frequency signals. Furthermore, during the uplink time slot, both the receiving path and the first transmitting path are in an off state, while the second transmitting path is in an on state. In this case, the second transmitting path supports the transmission of radio frequency signals, thereby supporting cross-split duplex (xDD) mode.

[0051] As shown in Figure 2, xDD mode is an enhanced TDD (Time Division Duplexing) mode, which introduces an uplink (UL) subband into the DL time slot of TDD to increase uplink transmission opportunities and improve uplink latency.

[0052] In xDD mode, during at least a portion of the downlink time slot, the radio frequency (RF) signal is amplified by the power amplification unit 11. The amplified RF signal is then transmitted from the first output of the power amplification unit 11 to the first antenna group 20 and transmitted through the antenna in the first antenna group 20, thereby achieving the transmission of the RF signal. The RF signal is also received by the antenna of the first antenna group 20 and transmitted through the switching unit 12 to the low-noise amplification unit 13 for low-noise amplification, thus achieving the reception of the RF signal. During the uplink time slot, the RF signal is amplified by the power amplification unit 11. The amplified RF signal is then transmitted from the second output of the power amplification unit 11 to the first antenna group 20 and transmitted through the antenna in the first antenna group 20, thereby achieving the transmission of the RF signal.

[0053] The radio frequency circuit 10 provided in this embodiment includes a power amplification unit 11, a switching unit 12, and a low-noise amplification unit 13. The first output terminal of the power amplification unit 11 is connected to a first antenna group 20. The second output terminal of the power amplification unit 11 is connected to a first terminal of the switching unit 12, enabling power amplification of the radio frequency signal. The input terminal of the low-noise amplification unit 13 is connected to the other first terminal of the switching unit 12, enabling low-noise amplification of the radio frequency signal received by the first antenna group 20. The second terminal of the switching unit 12 is connected to the first antenna group 20. During the downlink time slot of the radio frequency signal, the switching unit 12 connects the first antenna group 20 and the low-noise amplification unit 13, and disconnects the connection between the first antenna group 20 and the second output terminal. The signal is then amplified by the power amplification unit 11 and the first... The output terminal transmits the amplified radio frequency signal to the first antenna group 20. This enables simultaneous transmission and reception of radio frequency signals through the first transmit and receive paths, increasing the transmit gap in the downlink time slot and thus supporting xDD mode. This solves the problem in related technologies where the radio frequency architecture of the power amplifier unit 11 and the low-noise amplifier unit 13 share the switching unit 12, which only supports time-division multiplexing, thus helping to improve communication performance. In addition, the radio frequency circuit 10 can also support time-division multiplexing of radio frequency signals through the second transmit and receive paths, supporting time-division duplex mode, thus supporting multiple operating modes and further improving communication performance. Furthermore, the first and second transmit paths share the power amplifier unit 11, realizing the multiplexing of the power amplifier unit 11 without the need for additional low-noise amplifier devices and switching devices, reducing costs and facilitating miniaturization design.

[0054] In some embodiments, the switching unit 12 is further configured to time-division multiplex the path between the first antenna group 20 and the low-noise amplification unit 13, as well as the path between the first antenna group 20 and the second output terminal; wherein, the power amplification unit 11 is configured to transmit the power-amplified radio frequency signal to the first antenna group 20 via the second output terminal through the switching unit 12 when the second transmission path is in the on state; the low-noise amplification unit 13 is configured to perform low-noise amplification processing on the radio frequency signal received by the first antenna group 20 when the receiving path is in the on state, thereby supporting time-division duplex (TDD) mode.

[0055] In the application, during the downlink time slot, the receiving path is in the on state, and both the first and second transmitting paths are in the off state. Under these circumstances, the receiving path supports the reception of radio frequency signals. Furthermore, during the uplink time slot, both the receiving path and the first transmitting path are in the off state, and the second transmitting path is in the on state. Under these circumstances, the second transmitting path supports the transmission of radio frequency signals, thereby supporting TDD mode.

[0056] Figure 3 provides a timing diagram for time-division duplex (TDD) mode. In applications, uplink time slots can alternate with downlink time slots in TDD mode. Referring to Figures 2 and 3, compared to TDD mode, xDD mode adds an uplink gap to the downlink time slot.

[0057] Referring to Figure 3, in TDD mode, during the uplink time slot, the radio frequency signal is amplified by the power amplification unit 11. The amplified radio frequency signal is then transmitted from the second output terminal of the power amplification unit 11 to the first antenna group 20 and transmitted through the antenna in the first antenna group 20, thereby realizing the transmission of the radio frequency signal. During the downlink time slot, the radio frequency signal is received by the antenna of the first antenna group 20 and transmitted through the switching unit 12 to the low noise amplification unit 13 for low noise amplification, thereby realizing the reception of the radio frequency signal.

[0058] The radio frequency circuit 10 provided in this embodiment of the application uses a switching unit 12 to time-division multiplex the path between the first antenna group 20 and the low-noise amplifier unit 13, as well as the path between the first antenna group 20 and the second output terminal. This time-division multiplexing of the second transmit and receive paths supports time-division multiplexing of radio frequency signals, thus supporting TDD mode. It can be understood that in TDD mode, the first transmit path remains open. In xDD mode, by turning on the second transmit path during the downlink time slot, both receiving and transmitting are supported. Therefore, the radio frequency circuit 10 provided in this embodiment of the application, by adding a first transmit path to the second transmit and receive paths, achieves simultaneous transmission and reception of radio frequency signals, which helps improve communication performance. It also enables the multiplexing of the low-noise amplifier unit 13, improving integration and reducing cost.

[0059] In some embodiments, as shown in Figures 4 and 5, the first antenna group 20 includes a first antenna 21 and a second antenna 22. The first antenna 21 can be one or more antennas, and the second antenna 22 can be one or more antennas; the specific configuration can be determined according to the actual scenario and is not limited here.

[0060] The first output terminal of the power amplifier unit 11 is used to connect to the first antenna 21. The first antenna 21 is at least used to support the transmission processing of radio frequency signals. For example, the first antenna 21 supports the transmission processing of radio frequency signals; or, in addition to supporting the transmission processing of radio frequency signals, the first antenna 21 also supports the reception processing of radio frequency signals.

[0061] The second terminal of the switching unit 12 is connected to the second antenna 22. The second antenna 22 is used to support the transmission and reception of radio frequency signals. In some embodiments, when there are multiple second antennas 22, the multiple second terminals of the switching unit 12 are connected to the multiple second antennas 22 in a one-to-one correspondence, and the second terminals of different switching units 12 are connected to different second antennas 22. In this embodiment, the second terminal of the switching unit 12 refers to the terminal used for connection to the second antenna 22, and the so-called second terminals of different switching units 12 refer to the different second antennas 22 they are connected to. Multiple second antennas 22 can simultaneously support the transmission and reception of radio frequency signals. In other embodiments, the radio frequency circuit 10 may include a single second antenna 22, and the second terminal of the switching unit 12 is connected to this second antenna 22. That is, the radio frequency circuit 10 may use a single second antenna 22 to support the transmission and reception of radio frequency signals; the radio frequency circuit 10 may also use multiple second antennas 22 to simultaneously support the transmission and reception of radio frequency signals. In practice, the specific number of second antennas (22) can be set according to actual needs and is not limited here.

[0062] The switching unit 12 is used to select the path between the second output terminal of the power amplifier unit 11, the low noise amplifier unit 13, and the second antenna 22.

[0063] In this embodiment, the path between the first output terminal of the power amplifier unit 11 and the first antenna 21 is the first transmission path, and the path between the second output terminal of the power amplifier unit 11, the switching unit 12, and the second antenna 22 is the second transmission path. The path between the low-noise amplifier unit 13, the switching unit 12, and the second antenna 22 is the receiving path.

[0064] During the downlink time slot, the switching unit 12 can connect the low-noise amplifier unit 13 and the second antenna 22, and disconnect the connection between the second output terminal and the second antenna 22. The power amplifier unit 11 can transmit the amplified radio frequency signal to the first antenna 21 through the first output terminal, and the low-noise amplifier unit 13 can perform low-noise amplification on the radio frequency signal received by the second antenna 22, thereby supporting simultaneous transmission and reception of radio frequency signals. During the uplink time slot, the switching unit 12 can disconnect the connection between the low-noise amplifier unit 13 and the second antenna 22, and connect the connection between the second output terminal and the second antenna 22. The power amplifier unit 11 can transmit the amplified radio frequency signal to the second antenna 22 through the second output terminal, thereby supporting the transmission of radio frequency signals. This enables xDD mode support.

[0065] In xDD mode, during at least a portion of the downlink time slot, both the first transmit path and the receive path are in the on state, while the second transmit path is in the off state. In this case, the radio frequency signal is amplified by the power amplification unit 11, and the amplified radio frequency signal is transmitted from the first output terminal of the power amplification unit 11 to the first antenna 21 and then transmitted through the first antenna 21, thereby realizing the transmission of the radio frequency signal. Furthermore, during the downlink time slot, the radio frequency signal is received by the second antenna 22 and transmitted through the switching unit 12 to the low noise amplification unit 13 for low noise amplification, thereby realizing the reception of the radio frequency signal. During the uplink time slot, both the first transmit path and the receive path are in the off state, while the second transmit path is in the on state. In this case, the radio frequency signal is amplified by the power amplification unit 11, and the amplified radio frequency signal is transmitted from the second output terminal of the power amplification unit 11 to the second antenna 22 and then transmitted through the second antenna 22, thereby realizing the transmission of the radio frequency signal.

[0066] During the uplink time slot in xDD mode, the first transmission path can also be activated to support the transmission processing of radio frequency (RF) signals. Specifically, the RF signal undergoes power amplification processing by the power amplification unit 11, and the amplified RF signal is transmitted from the first output terminal of the power amplification unit 11 to the first antenna 21, and then transmitted through the first antenna 21. In applications, the first transmission path and / or the second transmission path can be selected to activate according to actual application requirements; no further limitations are imposed here.

[0067] In TDD mode, during the uplink time slot, both the first transmit path and the receive path are disconnected, while the second transmit path is on. Under these conditions, the radio frequency signal is amplified by the power amplifier unit 11, and the amplified radio frequency signal is transmitted from the second output terminal of the power amplifier unit 11 to the second antenna 22 and then transmitted through the second antenna 22, thereby realizing the transmission of the radio frequency signal. During the downlink time slot, both the first transmit path and the second transmit path are disconnected, while the receive path is on. Under these conditions, the radio frequency signal is received by the second antenna 22 and transmitted through the switching unit 12 to the low noise amplifier unit 13 for low noise amplification, thereby realizing the reception of the radio frequency signal.

[0068] It should be noted that when the radio frequency circuit 10 includes multiple second antennas 22, the operating states of each second antenna 22 are the same. As shown in Figures 4 and 5, in at least a portion of the downlink time slot in xDD mode and in the downlink time slot in TDD mode, the two second antennas 22 simultaneously support the reception processing of the received signal; in the uplink time slots of xDD mode and TDD mode, the two second antennas 22 simultaneously support the transmission processing of the radio frequency signal.

[0069] The radio frequency circuit 10 provided in this application embodiment includes a first antenna group 20 comprising a first antenna 21 and a second antenna 22. A first output terminal of a power amplifier unit 11 is connected to the first antenna 21, and a second terminal of a switching unit 12 is connected to the second antenna 22. During the downlink time slot of the radio frequency signal, the switching unit 12 conducts the path between the low-noise amplifier unit 13 and the second antenna 22 and disconnects the path between the second output terminal and the second antenna 22. The power amplifier unit 11 transmits the amplified radio frequency signal to the first antenna 21 through its first output terminal. This radio frequency circuit 10 achieves multiplexing of the power amplifier unit 11 for the first and second transmission paths, and also multiplexing of the switching unit 12 for the second transmission and receiving paths. Therefore, it can support simultaneous transmission and reception of radio frequency signals based on the first and second transmission paths, and can support time-division multiplexing of radio frequency signals based on the second transmission and receiving paths. It supports TDD and xDD modes, improves integration, and helps enhance communication performance.

[0070] In some embodiments, as shown in FIG6, the first antenna group 20 includes a third antenna 23. The third antenna 23 can be one or more. The second terminal of the switching unit 12 is connected to the third antenna 23. When there are multiple third antennas 23, the multiple second terminals of the switching unit 12 are connected one-to-one with the multiple third antennas 23, and the second terminals of different switching units 12 are connected to different third antennas 23.

[0071] The first output terminal of the power amplifier unit 11 is used to connect to another first terminal of the switching unit 12.

[0072] As shown in Figure 7, the switching unit 12 is a multi-on switch. A multi-on switch can be understood as a switch that can simultaneously conduct multiple paths.

[0073] In this embodiment, the path connecting the first output terminal of the power amplifier unit 11 and the third antenna 23 is the first transmission path, and the path connecting the second output terminal of the power amplifier unit 11, the switching unit 12, and the third antenna 23 is the second transmission path. The path connecting the low-noise amplifier unit 13, the switching unit 12, and the third antenna 23 is the receiving path. The multi-channel switch can simultaneously activate both the first transmission path and the receiving path.

[0074] In some application scenarios, during the downlink time slot, the multiplexer can connect the path between the third antenna 23 and the low-noise amplifier unit 13, simultaneously connect the path between the third antenna 23 and the first output terminal, and disconnect the path between the third antenna 23 and the second output terminal. That is, both the first transmit and receive paths are active, while the second transmit path is disconnected. In this case, the power amplifier unit 11 can transmit the amplified RF signal to the multiplexer through the first output terminal. The multiplexer then aggregates the amplified RF signal and the RF signal received by the third antenna 23 before transmitting them to the third antenna 23, thus supporting simultaneous transmission and reception of RF signals. During the uplink time slot, the multiplexer can... The path between the third antenna 23 and the second output terminal of the power amplifier unit 11 is opened, while the path between the third antenna 23 and the low-noise amplifier unit 13 and the first output terminal of the power amplifier unit 11 are closed. That is, the second transmission path is in the conducting state, and the first transmission path and the receiving path are both in the open state. Under these circumstances, the power amplifier unit 11 can transmit the amplified radio frequency signal through the second output terminal to the third antenna 23 via the multiplexer, and the third antenna 23 will then transmit the radio frequency signal, thereby realizing the transmission of the radio frequency signal. In this way, time-division multiplexing and simultaneous transmission and reception of radio frequency signals are realized, that is, xDD mode is supported.

[0075] In xDD mode, during at least a portion of the downlink time slot, both the first transmit path and the receive path are in the ON state, while the second transmit path is in the OFF state. The radio frequency (RF) signal is amplified by the power amplifier unit 11, and the amplified RF signal is transmitted from the first output of the power amplifier unit 11 to the multiplexer. The amplified RF signal and the RF signal received by the third antenna 23 are aggregated at the multiplexer, and the aggregated signal is transmitted by the third antenna 23. Furthermore, the RF signal is received by the third antenna 23 and aggregated with the amplified RF signal inside the multiplexer. The aggregated signal is transmitted to the low-noise amplifier unit 13 for low-noise amplification, thereby achieving the reception of the RF signal. During the uplink time slot, the second transmit path is in the ON state, while both the first transmit path and the receive path are in the OFF state. The RF signal is amplified by the power amplifier unit 11, and the amplified RF signal is transmitted from the second output of the power amplifier unit 11 through the multiplexer to the third antenna 23, and then transmitted by the third antenna 23.

[0076] It should be noted that the frequency band of the amplified RF signal and the RF signal received by the third antenna 23 are different. For example, as shown in Figure 8, the frequency band of the amplified RF signal can be the frequency band corresponding to the narrowband, while the RF signal received by the antenna (such as the third antenna 23) can be the remaining frequency band in the passband excluding the narrowband.

[0077] In some application scenarios, during the downlink time slot, the multiple-pass switch can connect the third antenna 23 and the low-noise amplifier unit 13, and disconnect the path between the third antenna 23 and the first output terminal, as well as the path between the third antenna 23 and the second output terminal. That is, the receiving path is on, while the first and second transmitting paths are off. In this case, the low-noise amplifier unit 13 can perform low-noise amplification on the RF signal received by the third antenna 23, thereby achieving RF signal reception. During the uplink time slot, the multiple-pass switch can connect the third antenna 23 and the power amplifier unit 11. The path between the second output terminal and the third antenna 23 and the low-noise amplifier unit 13 is disconnected, as is the path between the third antenna 23 and the first output terminal of the power amplifier unit 11. That is, the second transmission path is in the conducting state, and the first transmission path and the receiving path are both in the disconnected state. Under this condition, the power amplifier unit 11 can transmit the power-amplified radio frequency signal to the third antenna 23 through the multiple-pass switch via the second output terminal, and the third antenna 23 will transmit the radio frequency signal, thereby realizing the transmission of the radio frequency signal; thus, time-division multiplexing of radio frequency signals is realized, that is, TDD mode is supported.

[0078] In TDD mode, during the uplink time slot, both the first transmit path and the receive path are disconnected, while the second transmit path is on. Under these conditions, the radio frequency signal is amplified by the power amplifier unit 11, and the amplified radio frequency signal is transmitted from the second output of the power amplifier unit 11 through the multi-pass unit to the third antenna 23, and then transmitted through the third antenna 23, thereby realizing the transmission of the radio frequency signal. During the downlink time slot, both the first transmit path and the second transmit path are disconnected, while the receive path is on. Under these conditions, the radio frequency signal is received by the third antenna 23 and transmitted through the multi-pass unit to the low-noise amplifier unit 13 for low-noise amplification, thereby realizing the reception of the radio frequency signal.

[0079] The radio frequency circuit 10 provided in this application embodiment includes a first antenna group 20 comprising a third antenna 23. A second terminal of a switching unit 12 is connected to the third antenna 23, and a first output terminal is connected to another first terminal of the switching unit 12. The switching unit 12 is a multiplexer. During the downlink time slot of the radio frequency signal, the multiplexer is used to open the path between the third antenna 23 and the low-noise amplifier unit 13, and to open the path between the third antenna 23 and the first output terminal, while disconnecting the path between the third antenna 23 and the second output terminal. The power amplifier unit 11 transmits the amplified radio frequency signal to the multiplexer through the first output terminal, thereby aggregating the amplified radio frequency signal and the radio frequency signal received by the third antenna 23 and transmitting them to the third antenna 23. Thus, the third antenna 23 supports the transmission and reception of radio frequency signals, realizing the multiplexing of the first transmit path, the second transmit path, and the receive path for the third antenna 23. This supports both TDD and xDD modes, improving integration, reducing costs, and contributing to improved communication performance. Furthermore, this embodiment reuses the TDD mode architecture and further implements the xDD mode on the basis of supporting the TDD mode, with minor improvements and easy implementation.

[0080] In some embodiments, as shown in Figures 5 and 6, the radio frequency circuit 10 further includes a first filtering unit 14. The first output terminal of the power amplification unit 11 is connected to the first antenna group 20 via the first filtering unit 14. The first filtering unit 14 is used to support filtering processing of the power amplified radio frequency signal.

[0081] As shown in Figure 5, the first output terminal of the power amplifier unit 11 is connected to the first antenna 21 via the first filter unit 14. The first filter unit 14 can be used to filter the signal output from the first output terminal of the power amplifier unit 11 and transmit it to the first antenna 21 for transmission.

[0082] As shown in Figure 6, the first output terminal of the power amplifier unit 11 is connected to another first terminal of the switch unit 12 via the first filter unit 14, so as to be connected to the third antenna 23 through the switch unit 12. The first filter unit 14 can be used to filter the signal output from the first output terminal of the power amplifier unit 11, and transmit it to the switch unit 12. The radio frequency signals received by the third antenna 23 are then aggregated and transmitted by the third antenna 23.

[0083] The first filtering unit 14 may include a digitally tunable filter. A digitally tunable filter is a filter implemented using digital signal processing technology and whose filtering parameters can be adjusted as needed. Digitally tunable filters can be used in a variety of applications, from audio processing, communications, and signal analysis to medical imaging. The flexibility in adjusting parameters gives them more advantages than analog filters.

[0084] Figure 8 provides a schematic diagram of a digitally tunable filter. As shown in Figure 8, its framework can be simply described as a fusion of a bandpass filter and a narrowband filter. In the figure, B represents the bandpass filter, and A represents the narrowband filter. A is contained within B and its position is adjustable. In this embodiment, the narrowband filter A can correspond to the frequency band of the amplified RF signal, and the bandpass filter B can correspond to the frequency band of the RF signal received by the antenna. In applications, the parameters of the narrowband filter A and the bandpass filter B can be set according to actual needs, without specific limitations here.

[0085] It is understandable that the uplink transmission and downlink reception belong to the same frequency band. Technically, narrowband uplink can be used to solve the problem of coexistence interference. However, the problem of sideband interference caused by narrowband interference may still exist, affecting reception performance. As shown in Figure 9, the transmitted narrowband signal A can boost surrounding signals, mainly referring to noise within the passband B. To address this, the RF circuit 10 provided in this embodiment performs narrowband filtering on the power-amplified RF signal by setting a first filtering unit 14. This filters out noise signals within the reception passband and outside the transmitted narrowband, reducing the sideband interference caused by the transmitted narrowband signal and helping to improve communication performance.

[0086] In some embodiments, as shown in FIG10, the power amplification unit 11 includes a first power amplifier 111 (PA) and a first switch 112. The first power amplifier 111 is used to support power amplification processing of radio frequency signals, wherein the radio frequency signal can be a signal of any suitable frequency band, which is not limited herein.

[0087] The second terminal of the first switch 112 is connected to the output terminal of the first power amplifier 111. One first terminal of the first switch 112 serves as the first output terminal of the power amplifier unit 11, and is also used to connect to the first antenna group 20. As shown in Figures 4 and 5, the first terminal of the first switch 112 is used to connect to the first antenna 21. As shown in Figure 6, the first terminal of the first switch 112 is used to connect to the third antenna 23. The other first terminal of the first switch 112 serves as the second output terminal of the power amplifier unit 11, and is connected to one first terminal of the switch unit 12. The first switch 112 is used to select and connect the path between the first power amplifier 111 and the first output terminal of the power amplifier unit 11, and also to select and connect the path between the first power amplifier 111 and the second output terminal of the power amplifier unit 11.

[0088] In this embodiment, the path containing the first power amplifier 111, the first switch 112, and the first antenna group 20 is the first transmission path, the path containing the first power amplifier 111, the first switch 112, the switch unit 12, and the first antenna group 20 is the second transmission path, and the path containing the low noise amplifier unit 13, the switch unit 12, and the first antenna group 20 is the receiving path.

[0089] The first switch 112 can be used to turn on the path between the first output terminal of the power amplifier unit 11 and the first power amplifier 111 during the downlink time slot of the radio frequency signal, and to turn off the path between the second output terminal of the power amplifier unit 11 and the first power amplifier 111.

[0090] In the application, the first switch 112 can be used to turn on the path between the first output terminal of the power amplifier unit 11 and the first power amplifier 111 and disconnect the path between the second output terminal of the power amplifier unit 11 and the first power amplifier 111 during at least a portion of the downlink time slot. It also turns on the path between the first antenna group 20 and the low-noise amplifier unit 13 through the switch unit 12, so that both the first transmit path and the receive path are in the on state, and the second transmit path is in the off state, thereby supporting simultaneous transmission and reception of radio frequency signals. Furthermore, the first switch 112 can disconnect the path between the first output terminal of the power amplifier unit 11 and the first power amplifier 111 and disconnect the path between the second output terminal of the power amplifier unit 11 and the first power amplifier 111 during the remaining portion of the downlink time slot. The first switch 112 connects the first antenna group 20 and the low-noise amplifier 13 via the switch unit 12, ensuring that the receiving path is active while the first and second transmitting paths are disconnected, thus supporting the reception of radio frequency signals. Furthermore, the first switch 112 can be used to disconnect the path between the first output terminal of the power amplifier unit 11 and the first power amplifier 111 during the uplink time slot of the radio frequency signal, and connect the path between the second output terminal of the power amplifier unit 11 and the first power amplifier 111 to support the transmission of radio frequency signals. The switch unit 12 also connects the path between the second output terminal of the power amplifier unit 11 and the first antenna group 20, ensuring that the second transmitting path is active while the first transmitting and receiving paths are disconnected. This enables the support of xDD mode.

[0091] The first switch 112 can be used to disconnect the path between the first output terminal of the power amplifier unit 11 and the first power amplifier 111 during the downlink time slot, and disconnect the path between the second output terminal of the power amplifier unit 11 and the first power amplifier 111. The switch unit 12 then connects the path between the first antenna group 20 and the low-noise amplifier unit 13, making the receiving path active while both the first and second transmitting paths are disconnected, thus supporting the reception of radio frequency signals. Furthermore, during the uplink time slot, the switch disconnects the path between the first output terminal of the power amplifier unit 11 and the first power amplifier 111, and connects the path between the second output terminal of the power amplifier unit 11 and the first power amplifier 111. The switch unit 12 then disconnects the path between the first antenna group 20 and the low-noise amplifier unit 13, making the second transmitting path active while both the first transmitting and receiving paths are disconnected, thus supporting the transmission of radio frequency signals. This enables support for TDD mode.

[0092] The radio frequency circuit 10 provided in this application embodiment includes a power amplification unit 11 comprising a first power amplifier 111 and a first switch 112. The first power amplifier 111 supports power amplification processing of radio frequency signals, and the first switch 112 conducts the path between the first output terminal and the first power amplifier 111 during the downlink time slot of the radio frequency signal, and disconnects the path between the second output terminal and the first power amplifier 111. This realizes the multiplexing of the first power amplifier 111 for the first and second transmission paths, eliminating the need to set separate power amplifiers for the two transmission paths, improving integration, reducing costs, and realizing two transmission paths through the combination of the first power amplifier 111 and the first switch 112, providing technical support for supporting xDD mode, thereby achieving the purpose of improving performance.

[0093] In some embodiments, as shown in FIG5, the radio frequency circuit 10 further includes a second filtering unit 15. The first terminal of the switching unit 12 is connected to the first antenna group 20 via the second filtering unit 15. The second filtering unit 15 is used to support filtering of the amplified radio frequency signal and to support filtering of the radio frequency signal received by the first antenna group 20.

[0094] The second filtering unit 15 may include switching devices and filters, wherein the filters may be surface acoustic wave (SAW) filters. The second filtering unit 15 can support filtering of radio frequency signals in multiple frequency bands, wherein the multiple frequency bands may include B1, B3, B4, B25, B32, B34, B39, B7, B40, B41, B66, B75 and B76, etc.

[0095] It should be noted that the second filtering unit 15 can be equipped with one or more filters, and the second filtering unit 15 can also be equipped with one or more switching devices. The specific number of filters and switching devices can be set according to the frequency band of the supported radio frequency signal and actual needs, and will not be limited in detail here.

[0096] The radio frequency circuit 10 provided in this application embodiment also includes a second filtering unit 15. The first end of the switching unit 12 is connected to the first antenna group 20 through the second filtering unit 15. The second filtering unit 15 supports filtering of the power-amplified radio frequency signal and filtering of the radio frequency signal received by the first antenna group 20, thereby realizing the filtering of the radio frequency signal, reducing noise interference and improving performance.

[0097] In some embodiments, as shown in Figures 4 to 6, the first antenna group 20 includes multiple antennas. The number of the first antenna group 20 can be 2, 3, 4 or other suitable numbers, which can be set according to actual needs and are not limited here.

[0098] The second output terminal of the power amplifier unit 11 is used to connect to at least some of the antennas in the first antenna group 20. The second output terminal of the power amplifier unit 11 can be used to connect to one antenna in the first antenna group 20; for example, as shown in Figures 4 and 5, the second output terminal of the power amplifier unit 11 is used to connect to the first antenna 21. The second output terminal of the power amplifier unit 11 can also be used to connect to each antenna in the first antenna group 20; for example, as shown in Figure 6, taking the first antenna group 20 as an example where it includes two third antennas 23, the second output terminal of the power amplifier unit 11 is used to connect to both third antennas 23.

[0099] The second terminal of the switching unit 12 is used to connect to at least some of the antennas in the first antenna group 20. The second terminal of the switching unit 12 can be connected to one antenna in the first antenna group 20. Multiple second terminals of the switching unit 12 can be connected one-to-one to multiple antennas in the first antenna group 20, wherein different second terminals of the switching unit 12 connect to different antennas in the first antenna group 20; in this case, the RF circuit 10 supports dual transmit / receive functionality for RF signals. For example, as shown in Figure 4, taking the first antenna group 20 as having two second antennas 22, the two second terminals of the switching unit 12 are connected one-to-one to the two second antennas 22 in the first antenna group 20; as shown in Figure 6, taking the first antenna group 20 as having two third antennas 23, the two second terminals of the switching unit 12 are connected one-to-one to the two third antennas 23 in the first antenna group 20.

[0100] It should be noted that the antennas connected to the second output terminal of the power amplifier unit 11 and the second terminal of the switching unit 12 can be different as shown in Figures 4 and 5, or at least partially the same as shown in Figure 6. The specific settings can be made according to the actual scenario, and no limitation is made here.

[0101] In some embodiments, as shown in Figures 4 and 5, the second transmission path containing the dual-branch second antenna 22 and the second transmission path containing the dual-branch third antenna 23, as shown in Figure 6, can respectively realize the dual transmission function of radio frequency signals, which helps to further improve communication performance.

[0102] Based on the same inventive concept, in some embodiments, as shown in Figures 10 to 12, a radio frequency (RF) front-end device 30 is provided. This RF front-end device 30 is configured with a first RF input port 311, an RF output port 32, an auxiliary port 33, and an antenna port 34. The RF front-end device 30 includes the RF circuit 10 described above, the details of which are not repeated here. The RF front-end device 30 can be a seventh-generation RF front-end device, such as Phase7, Phase7 lite, or Phase7 LE, or other suitable devices, without specific limitations.

[0103] The first RF input port 311 is connected to the input terminal of the power amplifier unit 11 in the RF circuit 10. The auxiliary port 33 is connected to the first output terminal of the power amplifier unit 11. The auxiliary port 33 is used to connect to the first antenna group 20. The RF output port 32 is connected to the output terminal of the low-noise amplifier unit 13 in the RF circuit 10. The antenna port 34 is connected to the second terminal of the switching unit 12 in the RF circuit 10. The antenna port 34 is used to connect to the first antenna group 20.

[0104] It should be noted that the number of the first RF input port 311, RF output port 32, auxiliary port 33, and antenna port 34 can each be one or more. The specific number can be set according to the specific structure of the RF circuit 10, and is not limited here. For example, as shown in Figures 11 and 12, the antenna port 34 includes a first antenna port 341 and a second antenna port 342 to support dual-transmission functionality. This is only an illustrative example; actual applications can be configured according to specific requirements.

[0105] The radio frequency (RF) front-end device 30 provided in this embodiment is configured with a first RF input port 311, an RF output port 32, an auxiliary port 33, and an antenna port 34. The RF front-end device 30 includes an RF circuit 10, which includes a power amplification unit 11, a switching unit 12, and a low-noise amplification unit 13. The first output terminal of the power amplification unit 11 is connected to a first antenna group 20, and the second output terminal of the power amplification unit 11 is connected to a first terminal of the switching unit 12. The power amplification unit 11 supports power amplification of the RF signal. The input terminal of the low-noise amplification unit 13 is connected to the other first terminal of the switching unit 12. The low-noise amplification unit 13 supports low-noise amplification of the RF signal received by the first antenna group 20. The second terminal of the switching unit 12 is connected to the first antenna group 20. During the downlink time slot of the RF signal, the switching unit 12 connects the first antenna group 20 and the low-noise amplification unit 13, and disconnects the connection. The first antenna group 20 and the second output terminal are connected via a path. The amplified radio frequency signal is transmitted to the first antenna group 20 through the power amplifier unit 11 via the first output terminal. This allows simultaneous transmission and reception of radio frequency signals through the first transmit path and the receive path, increasing the transmit gap in the downlink time slot and thus supporting xDD mode. This solves the problem in related technologies where the radio frequency architecture of the power amplifier unit 11 and the low-noise amplifier unit 13 sharing the switching unit 12 only supports time-division multiplexing, which helps improve communication performance. In addition, the radio frequency circuit 10 can also support time-division multiplexing of radio frequency signals through the second transmit path and the receive path, supporting time-division duplex mode, thus supporting multiple operating modes and further improving communication performance. Furthermore, the first transmit path and the second transmit path share the power amplifier unit 11, realizing the multiplexing of the power amplifier unit 11 without the need for additional low-noise amplifier devices and switching devices, reducing costs and facilitating miniaturization design.

[0106] In some embodiments, as shown in FIG11, when the first antenna group 20 includes a first antenna 21 and a second antenna 22, the antenna port 34 is connected to the second antenna 22. An auxiliary port 33 is used to connect to the first antenna 21. For example, the auxiliary port 33 is connected to the first antenna 21. Alternatively, when the RF circuit 10 includes a first filter unit 14, the auxiliary port 33 is connected to the first filter unit 14, and the first filter unit 14 is connected to the first antenna 21. Thus, by using the auxiliary port 33 of the RF front-end device 30 to connect to the first antenna 21 in the first antenna group 20, the first antenna 21 can support the transmission of RF signals in the downlink time slot, thereby supporting xDD mode and improving performance.

[0107] In some embodiments, as shown in FIG12, the RF front-end device 30 further includes a second RF input port 312, which is connected to another first terminal of the switching unit 12. The second RF input port 312 is used to connect to an auxiliary port 33. For example, when the RF circuit 10 includes a first filter unit 14, the auxiliary port 33 is connected to the first filter unit 14, and the first filter unit 14 is connected to the second RF input port 312. When the first antenna group 20 includes a third antenna 23, the antenna port 34 is connected to the third antenna 23. Thus, by connecting the auxiliary port 33 of the RF front-end device 30 to the third antenna 23 in the first antenna group 20, the third antenna 23 can support the transmission of RF signals in the downlink time slot, thereby supporting xDD mode and improving performance.

[0108] In some embodiments, as shown in FIG12, when the RF front-end device 30 includes a first filtering unit 14, the first filtering unit 14 is externally located within the RF front-end device 30, which internally includes a power amplification unit 11, a low-noise amplification unit 13, and a switching unit 12. The first filtering unit 14 is connected to an auxiliary port 33 and is used to connect to the first antenna group 20. This decouples the platform from the interface, providing technical support for implementing xDD mode.

[0109] In some embodiments, when the RF front-end device 30 includes a first filtering unit 14, the RF front-end device 30 integrates a power amplification unit 11, a low-noise amplification unit 13, a switching unit 12, and a first filtering unit 14. The first filtering unit 14 is connected to an auxiliary port 33 and is used to connect to a first antenna group 20. This improves integration and facilitates further miniaturization.

[0110] Based on the same inventive concept, in some embodiments, as shown in Figures 10 to 12, a radio frequency (RF) system is provided, which includes an RF transceiver 40, a first antenna group 20, and an RF front-end device 30 as described above. The RF transceiver 40 is connected to the first RF input port 311 and the RF output port 32 of the RF front-end device 30, and the RF transceiver 40 is used to support the transmission and reception of RF signals.

[0111] The radio frequency (RF) system provided in this application embodiment includes an RF transceiver 40, a first antenna group 20, and an RF front-end device 30. The RF front-end device 30 is configured with a first RF input port 311, an RF output port 32, an auxiliary port 33, and an antenna port 34. The RF front-end device 30 includes an RF circuit 10, which includes a power amplifier unit 11, a switching unit 12, and a low-noise amplifier unit 13. The first output terminal of the power amplifier unit 11 is connected to the first antenna group 20, and the second output terminal of the power amplifier unit 11 is connected to a first terminal of the switching unit 12. The power amplifier unit 11 supports power amplification of the RF signal. The input terminal of the low-noise amplifier unit 13 is connected to the other first terminal of the switching unit 12. The low-noise amplifier unit 13 supports low-noise amplification of the RF signal received by the first antenna group 20. The second terminal of the switching unit 12 is connected to the first antenna group 20. During the time slot, the path between the first antenna group 20 and the low-noise amplifier unit 13 is opened by the switching unit 12, and the path between the first antenna group 20 and the second output terminal is closed. The amplified radio frequency signal is then transmitted to the first antenna group 20 through the power amplifier unit 11 via the first output terminal. This allows simultaneous transmission and reception of radio frequency signals through the first transmit and receive paths, increasing the transmit gap in the downlink time slot and supporting xDD mode, which helps improve communication performance. In addition, the radio frequency circuit 10 can also support time-division multiplexing of radio frequency signals through the second transmit and receive paths, supporting time-division duplex mode and thus supporting multiple operating modes, which helps further improve communication performance. Furthermore, the first and second transmit paths share the power amplifier unit 11, realizing the multiplexing of the power amplifier unit 11 without the need for additional low-noise amplifier devices and switching devices, reducing costs and facilitating miniaturization design.

[0112] In some embodiments, as shown in Figures 10 to 12, the radio frequency system further includes a receiving circuit 50 and a second antenna group 60. The receiving circuit 50 is connected to the radio frequency transceiver 40 and the second antenna group 60, respectively, and is used to support the reception and processing of radio frequency signals received by the second antenna group 60. The receiving circuit 50 may include a low-noise amplification module 51 and a filtering module. The low-noise amplification module 51 is connected to the radio frequency transceiver 40 and the filtering module, respectively, and supports low-noise amplification processing of the radio frequency signals. The low-noise amplification module 51 may include a low-noise amplifier and a switching device. The number of low-noise amplification devices and switching devices can be set according to the actual scenario and is not limited here. The switching device can be a single-pole single-throw switch, a single-pole multi-throw switch, or a multi-pole multi-throw switch, or a combination of multiple switches, and is not limited here.

[0113] The filtering module is connected to the low-noise amplifier module 51 and the second antenna group 60, respectively. The filtering module supports filtering of radio frequency signals. The filtering module may include a filter, for example, a surface acoustic wave filter. The number of filtering modules can be one or more, and can be set according to the receiving requirements, which is not limited here. For example, as shown in Figures 10 to 12, the receiving circuit 50 includes a first filtering module 52 and a second filtering module 53, and the second antenna group 60 includes antenna ANT2 and antenna ANT3. The first filtering module 52 is connected to the low-noise amplifier module 51 and antenna ANT2, respectively, and supports filtering of the radio frequency signals received by antenna ANT2. The second filtering module 53 is connected to the low-noise amplifier module 51 and antenna ANT3, respectively, and supports filtering of the radio frequency signals received by antenna ANT3.

[0114] The radio frequency system provided in this application embodiment also includes a receiving circuit 50 and a second antenna group 60. The receiving circuit 50 is connected to the radio frequency transceiver 40 and the second antenna group 60 respectively. The receiving circuit 50 supports the reception and processing of radio frequency signals received by the second antenna group 60. In this way, it can support multiple receptions, improve the reception performance of the radio frequency system, and help to further improve the communication performance.

[0115] In some embodiments, as shown in Figures 13 to 15, a radio frequency (RF) system is provided, which includes an RF transceiver 40, an RF front-end device 30, a receiving circuit 50, a first antenna group 20, and a second antenna group 60. It should be noted that in Figures 13 to 15, any unconnected ports represent connections to their respective devices.

[0116] The RF front-end device 30 can be a seventh-generation RF front-end device (Phase 7 LE), for example, the RF front-end device 30 can be an RF front-end transmitter chip. The RF front-end device 30 may include multiple RF input ports, multiple RF output ports 32, and multiple devices. Among them, the multiple RF input ports may include, for example, an intermediate frequency input port MB_IN, a high frequency input port HB_IN, an input port SRS_IN, a 2G high frequency input port 2G_HB, input ports TRx1 to TRx3, and low noise amplification input ports MB_LNA_IN1, MB_LNA_IN2, MHB_LNA_IN, and LMH_LNA_IN1 to LMH_LNA_IN3.

[0117] Multiple RF output ports 32 include low-noise amplifier output ports LNA_OUT1 to LNA_OUT6, intermediate frequency transmit output ports MB_Tx_OUT1 and MB_Tx_OUT2, intermediate frequency transceiver output port MB_TRx_OUT, high frequency output port HB_Tx_OUT1, and output port n41_OUT.

[0118] The components include switching devices, power amplifiers, low-noise amplifiers, duplexers, filters, impedance matching circuits, and coupling circuits. It should be noted that, through the high-frequency input port HB_IN and the input port SRS_IN, the RF system in this embodiment can achieve dual transmission of 4G and 5G signals, i.e., achieve dual connectivity (EUTRA NR dual-connectivity, ENDC).

[0119] The high-frequency input port HB_IN is the same as the aforementioned first RF input port 311. The high-frequency input port HB_IN can be connected to the first power amplifier 111 and the power amplifier B7 PA (a power amplifier in the B7 band), respectively. The power amplifier B7 PA can be connected to a corresponding filter or duplexer. The first power amplifier 111 can be the high-frequency power amplifier HB PA, which is connected to a second terminal of the first switch 112, which can be a multi-pole multi-throw switch. The other first terminal of the first switch 112 is connected to the input port SRS_IN. High-frequency RF signals can be transmitted through the high-frequency input port HB_IN, which may include B7, B40, and B41, etc. A first terminal of the first switch 112 is connected to the port HB_Tx_Out1, which is the same as the aforementioned auxiliary port 33. As shown in Figure 13, port HB_Tx_Out1 is connected to antenna ANT4; as shown in Figures 14 and 15, port HB_Tx_Out1 is connected to the first filter unit 14, wherein in Figure 14, the first filter unit 14 is connected to antenna ANT4; and in Figure 15, the first filter unit 14 is connected to port n41_OUT. The first filter unit 14 can be a digitally adjustable filter. The remaining first terminals of the first switch 112 (including ports 40R, 41R, 41TR, and 41TR) can be connected to the corresponding filters or duplexers, wherein the filters are the devices in the aforementioned second filter unit 15.

[0120] The intermediate frequency (IF) input port MB_IN is connected to one end of the IF power amplifier MB PA, and the other end of MB PA is connected to one end of a switching device, which can be a single-pole multi-throw switch. RF signals in the IF band can be transmitted through the IF input port MB_IN, including bands such as B1, B3, B25, B34, and B39. Multiple ports on the other end of the switching device can be connected to corresponding filters. For example, port B1 of the switching device can be connected to a duplexer for the B1 band. If the RF transceiver 40 provides RF signals in a band outside the aforementioned IF band, and the RF front-end device 30 does not contain a corresponding duplexer or filter, then ports MB_Tx_Out1 and MB_Tx_Out2 can be selected to output to the corresponding duplexer or filter outside the RF front-end device 30 for processing, and then transmitted through ports TRx1 to TRx3.

[0121] In some embodiments, if the frequency band of the radio frequency signal provided by the radio frequency transceiver 40 is neither within the aforementioned mid-high frequency band nor within the aforementioned high frequency band, then input ports TRx1 to TRx3 can be selected for transmission.

[0122] The RF front-end device 30 also includes duplexers or filters corresponding to frequency bands B1, B3, B25, B34, B39, B7, B40, and B41, wherein the filter is a device in the aforementioned second filtering unit 15. The RF front-end device 30 also includes an impedance matching circuit, a switching device, and a coupling circuit. The duplexers or filters in the RF front-end device 30 can be connected to multiple first terminals of the switching unit 1212 via the impedance matching circuit. The two second terminals of the switching unit 1212 are respectively connected to the first antenna port 341ANT1 and the second antenna port 342ANT2. Specifically, the first antenna port 341ANT1 is connected to antenna ANT0, and the second antenna port 342ANT2 is connected to antenna ANT1. The impedance matching circuit can be used to tune the impedance of each RF path. A coupling circuit is also included between the first antenna port 341ANT1 and the second antenna port 342ANT2 and the switching unit 1212. The coupling circuit can be used to detect the RF signal output power of the RF front-end device 30. Switching unit 1212 is a double-pole five-throw DP5T switch. To expand the ports of switching unit 1212, a single-pole three-throw SP3T switch can be connected in series. RF input ports 2G_HB, TRx2, and TRx3 are connected to the SP3T switch, and input port 2G_HB can be used to transmit signals in the 2G high-frequency band.

[0123] The RF front-end device 30 also includes a low-noise amplifier unit 13, which includes low-noise power amplifiers LNA1 to LNA6 and switching devices. The switching devices can be six-input, six-output switching devices (6×6 MUX). The low-noise amplifier unit 13 can be used to receive RF signals in the B1, B3, B4, B25, B32, B34, B39, B7, B40, B41, B66, B75, and B76 frequency bands.

[0124] In some embodiments, as shown in Figures 13 and 14, the first antenna group 20 includes three antennas: antenna ANT0, antenna ANT1, and antenna ANT4. Antenna ANT0 is connected to the first antenna port 341ANT1, and antenna ANT1 is connected to the second antenna port 342ANT2. As shown in Figure 13, antenna ANT4 is connected to port HB_Tx_Out1. As shown in Figure 14, antenna ANT4 is connected to the first filter unit 14.

[0125] In some embodiments, as shown in Figures 13 to 15, the receiving circuit 50 includes a low-noise amplification module 51, a first filtering module 52, and a second filtering module 53. The second antenna group 60 includes two antennas, antenna ANT2 and antenna ANT3, wherein antenna ANT2 is connected to the low-noise amplification module 51 via the first filtering module 52, and antenna ANT3 is connected to the low-noise amplification module 51 via the second filtering module 53. The first filtering module 52 and the second filtering module 53 each include a surface acoustic wave filter. The low-noise amplification module 51 is connected to the radio frequency transceiver 40, and includes a low-noise amplifier and switching devices.

[0126] Taking the RF system shown in Figure 13 as an example, in xDD mode, the RF signal output by the RF transceiver 40 is input from the port HB_IN of the RF front-end device 30. The input signal is amplified by the internal high-frequency power amplifier HB PA. The amplified signal is switched to port HB_TX_OUT by the first switch 112 and radiated out by the antenna ANT4. The received signal is input from the antennas ANT1 and ANT2 and input through the ANT1 and ANT2 ports of the DP5T switch at the front end of the RF front-end device 30. It is then filtered by an internal filter such as a surface acoustic wave (SAW) filter. The filtered signal is then amplified by the corresponding low-noise amplifier LNA in the low-noise amplifier unit 13 and output to the RF transceiver 40. In TDD mode: The RF signal output by the RF transceiver 40 is input from the HB_IN port of the RF front-end device 30. The input signal is amplified by the internal high-frequency power amplifier HB PA. The amplified signal is switched to the corresponding filter, such as the surface acoustic wave (SAW) filter, by the first switch 112. The signal after being filtered by the SAW filter is output from the antenna ports ANT1 and ANT2 of the DP5T switch at the front end of the RF front-end device 30 and transmitted by the antennas ANT1 and ANT2. The received signal is input from the antennas ANT1 and ANT2 and input through the ANT1 and ANT2 ports of the DP5T switch at the front end of the RF front-end device 30. It is then filtered by the internal filter, such as the surface acoustic wave (SAW) filter. The filtered signal is then amplified by the corresponding low-noise amplifier (LNA) in the low-noise amplifier unit 13 and output to the RF transceiver 40.

[0127] Taking the RF system shown in Figure 14 as an example, in xDD mode, the RF signal output by the RF transceiver 40 is input from port HB_IN of the RF front-end device 30. The input signal is amplified by the internal high-frequency power amplifier HB PA. The amplified signal is switched to port HB_TX_OUT by the first switch 112. After being filtered by a digitally adjustable filter, the signal is radiated out by antenna ANT4. The received signal is input from antennas ANT1 and ANT2, and then input through ports ANT1 and ANT2 of the DP5T switch at the front end of the RF front-end device 30. It is then filtered by an internal filter such as a surface acoustic wave (SAW) filter. After filtering, the signal is amplified by the corresponding low-noise amplifier (LNA) in the low-noise amplifier unit 13 and output to the RF transceiver 40. The TDD mode of the RF system shown in Figure 14 is the same as that in Figure 13, as described above.

[0128] Taking the RF system shown in Figure 15 as an example, in xDD mode, the RF signal output by the RF transceiver 40 is input from port HB_IN of the RF front-end device 30. The input signal is amplified by the internal high-frequency power amplifier HB PA. The amplified signal is switched to port HB_TX_OUT by the first switch 112. After being filtered by the digitally adjustable filter, the signal enters the DP5T switch in the RF front-end device 30 through port n41_OUT. The DP5T switch is a multi-ON switch. The transmit signal and the receive signal entering the DP5T switch are aggregated internally. The aggregated signal is transmitted by antennas ANT1 and ANT2 through antenna ports 34ANT1 and ANT2. The receive signal is input from antennas ANT1 and ANT2 and is input through ports ANT1 and ANT2 of the DP5T switch at the front end of the RF front-end device 30. The input receive signal and the transmit signal are aggregated inside the DP5T switch. The aggregated signal is filtered by an internal filter such as a surface acoustic wave (SAW) filter. After being filtered, the signal is amplified by the corresponding low-noise amplifier LNA in the low-noise amplifier unit 13 and output to the RF transceiver 40. The TDD mode of the RF system shown in Figure 15 is the same as that in Figure 13, as described above.

[0129] The radio frequency system provided in the above embodiments, based on the radio frequency front-end device 30 such as the seventh-generation radio frequency front-end device 30 Phase 7 LE, reuses its ports to increase the transmission path, thereby realizing the addition of an uplink transmission time slot in the downlink time slot, thus achieving dual-mode support for TDD and xDD. This solves the problem in related technologies where the radio frequency architecture of the power amplifier unit 11 and the low-noise amplifier unit 13 sharing the switching unit 12 only supports TDD mode, improving communication performance, increasing integration, and reducing costs. Furthermore, by setting a digitally adjustable filter, the interference problem between uplink and downlink is solved, further improving communication performance.

[0130] Based on the same inventive concept, this application also provides a communication device. The solution provided by this communication device is similar to the solution described in the radio frequency system above. Therefore, the specific limitations of one or more communication device embodiments provided below can be found in the limitations of the radio frequency system above, and will not be repeated here.

[0131] The communication device provided in this application embodiment includes a radio frequency (RF) system. The RF system includes an RF transceiver 40, a first antenna group 20, and an RF front-end device 30. The RF front-end device 30 is configured with a first RF input port 311, an RF output port 32, an auxiliary port 33, and an antenna port 34. The RF front-end device 30 includes an RF circuit 10, which includes a power amplifier unit 11, a switching unit 12, and a low-noise amplifier unit 13. The first output terminal of the power amplifier unit 11 is connected to the first antenna group 20, and the second output terminal of the power amplifier unit 11 is connected to a first terminal of the switching unit 12. The power amplifier unit 11 supports power amplification of the RF signal. The input terminal of the low-noise amplifier unit 13 is connected to the other first terminal of the switching unit 12. The low-noise amplifier unit 13 supports low-noise amplification of the RF signal received by the first antenna group 20. The second terminal of the switching unit 12 is connected to the first antenna group 20. During the downlink time slot of the signal, the path between the first antenna group 20 and the low-noise amplifier unit 13 is opened by the switching unit 12, and the path between the first antenna group 20 and the second output terminal is opened. The amplified radio frequency signal is then transmitted to the first antenna group 20 through the power amplifier unit 11 via the first output terminal. This allows simultaneous transmission and reception of radio frequency signals through the first transmit and receive paths, increasing the transmit gap in the downlink time slot and supporting xDD mode, which helps improve communication performance. In addition, the radio frequency circuit 10 can also support time-division multiplexing of radio frequency signals through the second transmit and receive paths, supporting time-division duplex mode, thus supporting multiple operating modes and further improving communication performance. Furthermore, the first and second transmit paths share the power amplifier unit 11, realizing the multiplexing of the power amplifier unit 11 without the need for additional low-noise amplifier devices and switching devices, reducing costs and facilitating miniaturization design.

[0132] As shown in Figure 16, further illustrating with a mobile phone as an example, specifically, as shown in Figure 16, the mobile phone 90 may include a memory 91 (which optionally includes one or more computer-readable storage media), processing circuitry 92, an input / output (I / O) subsystem 93, and at least one antenna assembly 94 as in any of the foregoing embodiments. These components optionally communicate via one or more communication buses or signal lines 95. Those skilled in the art will understand that the mobile phone 90 shown in Figure 16 does not constitute a limitation on the mobile phone and may include more or fewer components than illustrated, or combine certain components, or have different component arrangements. The various components shown in Figure 16 are implemented in hardware, software, or a combination of both, including one or more signal processing and / or application-specific integrated circuits.

[0133] Memory 91 optionally includes high-speed random access memory, and also optionally includes non-volatile memory, such as one or more disk storage devices, flash memory devices, or other non-volatile solid-state memory devices. Exemplary examples include software components stored in memory 91 such as an operating system 911, a communication module (or instruction set) 912, a global positioning system (GPS) module (or instruction set) 913, etc.

[0134] The processing circuit 92 can be used to control the operation of the mobile phone 90. This processing circuit 92 can be based on one or more microprocessors, microcontrollers, digital signal processors, baseband processors, power management units, audio codec chips, application-specific integrated circuits, etc.

[0135] The I / O subsystem 93 couples input / output peripherals on the mobile phone 90, such as the keypad and other input control devices, to the peripheral interface. The I / O subsystem 93 optionally includes a touchscreen, buttons, a tone generator, an accelerometer (motion sensor), an ambient light sensor and other sensors, LEDs and other status indicators, a data port, etc. For example, a user can control the operation of the mobile phone 90 by supplying commands via the I / O subsystem 93, and can use the output resources of the I / O subsystem 93 to receive status information and other outputs from the mobile phone 90. For instance, a user can press button 931 to turn the phone on or off.

[0136] In the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative descriptions of the above terms do not necessarily refer to the same embodiments or examples.

[0137] 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 specification.

[0138] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, 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 modifications and improvements all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

[0139] The following numbered clauses describe some implementation examples:

[0140] 1. A radio frequency (RF) circuit, wherein the RF circuit includes a power amplification unit, a switching unit, and a low-noise amplification unit; wherein,

[0141] The first output terminal of the power amplifier unit is used to connect to the first antenna group, and the second output terminal of the power amplifier unit is connected to a first terminal of the switching unit. The power amplifier unit is used to support power amplification processing of radio frequency signals.

[0142] The input terminal of the low-noise amplifier unit is connected to the other first terminal of the switching unit to support low-noise amplification processing of radio frequency signals.

[0143] The second end of the switching unit is connected to the first antenna group; wherein...

[0144] During the downlink time slot of the radio frequency signal, the switching unit is used to open the path between the first antenna group and the low noise amplification unit, and to close the path between the first antenna group and the second output terminal. The power amplification unit is used to transmit the power-amplified radio frequency signal to the first antenna group through the first output terminal.

[0145] 2. The radio frequency circuit according to claim 1, wherein the first antenna group includes a first antenna and a second antenna, wherein the first output terminal is used to connect to the first antenna, and the second terminal of the switching unit is connected to the second antenna;

[0146] During the downlink time slot of the radio frequency signal, the switching unit is used to turn on the path between the low noise amplifier unit and the second antenna, and to turn off the path between the second output terminal and the second antenna. The power amplifier unit is used to transmit the amplified radio frequency signal to the first antenna through the first output terminal.

[0147] 3. The radio frequency circuit according to claim 1, wherein the first antenna group includes a third antenna, wherein the second terminal of the switching unit is connected to the third antenna, and the first output terminal is used to connect to another first terminal of the switching unit;

[0148] The switching unit is a multi-way switch; wherein...

[0149] During the downlink time slot of the radio frequency signal, the multiple-pass switch is used to open the path between the third antenna and the low-noise amplifier unit, and to open the path between the third antenna and the first output terminal, and to disconnect the path between the third antenna and the second output terminal. The power amplifier unit is used to transmit the amplified radio frequency signal to the multiple-pass switch through the first output terminal, so that the power-amplified radio frequency signal and the radio frequency signal received by the third antenna are aggregated by the multiple-pass switch and then transmitted to the third antenna.

[0150] 4. The radio frequency circuit according to claim 3, wherein, during the uplink time slot of the radio frequency signal, the multiple-pass switch is used to open the path between the third antenna and the second output terminal, and to close the path between the third antenna and the low-noise amplifier unit, and to close the path between the third antenna and the first output terminal, and the power amplifier unit is used to transmit the power-amplified radio frequency signal to the third antenna through the multiple-pass switch via the second output terminal.

[0151] 5. The radio frequency circuit according to claim 1, wherein the first antenna group includes a third antenna, wherein the second terminal of the switching unit is connected to the third antenna, and the first output terminal is used to connect to another first terminal of the switching unit;

[0152] The switching unit is a multi-way switch; wherein...

[0153] During the downlink time slot of the radio frequency signal, the multi-pass switch is used to open the path between the third antenna and the low-noise amplifier unit, and to open the path between the third antenna and the first output terminal, and to open the path between the third antenna and the second output terminal. The low-noise amplifier unit is used to perform low-noise amplification processing on the radio frequency signal received by the third antenna.

[0154] 6. The radio frequency circuit according to claim 5, wherein, during the uplink time slot of the radio frequency signal, the multiple-pass switch is used to open the path between the third antenna and the second output terminal, and to close the path between the third antenna and the low-noise amplifier unit, and to close the path between the third antenna and the first output terminal, and the power amplifier unit is used to transmit the power-amplified radio frequency signal to the third antenna through the multiple-pass switch via the second output terminal.

[0155] 7. The radio frequency circuit according to any one of claims 1-6, wherein the radio frequency circuit further includes a first filtering unit, the first output terminal is connected to the first antenna group via the first filtering unit, and the first filtering unit is used to support filtering processing of the power-amplified radio frequency signal.

[0156] 8. The radio frequency circuit according to claim 7, wherein the first antenna group comprises a first antenna and a second antenna; wherein,

[0157] The first output terminal is connected to the first antenna via the first filtering unit. The first filtering unit is used to filter the signal output through the first output terminal and transmit it to the first antenna for transmission.

[0158] 9. The radio frequency circuit according to claim 7, wherein the first antenna group includes a third antenna; wherein,

[0159] The first output terminal is connected to another first terminal of the switching unit via the first filtering unit, and then connected to the third antenna via the switching unit. The first filtering unit is used to filter the signal output through the first output terminal and transmit it to the switching unit. The signal is then aggregated with the radio frequency signal received by the third antenna and transmitted by the third antenna.

[0160] 10. The radio frequency circuit according to claim 7, wherein the first filtering unit comprises a digitally adjustable filter.

[0161] 11. The radio frequency circuit according to any one of claims 1-6, wherein the switching unit is further configured to time-division multiplex the path between the first antenna group and the low-noise amplifier unit, and the path between the first antenna group and the second output terminal.

[0162] 12. The radio frequency circuit according to any one of claims 1-6, wherein the power amplification unit comprises:

[0163] A first power amplifier is used to support power amplification processing of the radio frequency signal;

[0164] A first switch, the second end of the first switch being connected to the output terminal of the first power amplifier; a first end of the first switch serving as the first output terminal, and a first end of the first switch being used to connect to the first antenna group; the other first end of the first switch serving as the second output terminal; the first switch being used to open the path between the first output terminal and the first power amplifier and to disconnect the path between the second output terminal and the first power amplifier during the downlink time slot of the radio frequency signal.

[0165] 13. The radio frequency circuit according to claim 12, wherein, during at least a portion of the downlink time slot, the first switch is used to connect the path between the first output terminal and the first power amplifier, and disconnect the path between the second output terminal and the first power amplifier, and the switching unit is used to connect the path between the first antenna group and the low noise amplifier unit.

[0166] During the remaining time slot of the downlink time slot, the first switch is used to disconnect the path between the first output terminal and the first power amplifier, and to disconnect the path between the second output terminal and the first power amplifier. The switching unit is used to connect the path between the first antenna group and the low noise amplifier unit.

[0167] During the uplink time slot of the radio frequency signal, the first switch is used to disconnect the path between the first output terminal and the first power amplifier, and to connect the path between the second output terminal and the first power amplifier. The switching unit is used to connect the path between the second output terminal and the first antenna group.

[0168] 14. The radio frequency circuit according to claim 12, wherein, during the downlink time slot, the first switch is used to disconnect the path between the first output terminal and the first power amplifier, and disconnect the path between the second output terminal and the first power amplifier, and the switching unit is used to connect the path between the first antenna group and the low noise amplifier unit.

[0169] During the uplink time slot of the radio frequency signal, the first switch is used to disconnect the path between the first output terminal and the first power amplifier, and to connect the path between the second output terminal and the first power amplifier. The switching unit is used to disconnect the path between the first antenna group and the low noise amplifier unit.

[0170] 15. The radio frequency circuit according to any one of claims 1-6, wherein the radio frequency circuit further comprises:

[0171] The second filtering unit is connected to the first antenna group via a first terminal of the switching unit. The second filtering unit is used to support filtering of the power-amplified radio frequency signal and to support filtering of the radio frequency signal received by the first antenna group.

[0172] 16. The radio frequency circuit according to claim 1 or 2, wherein the first antenna group includes multiple antennas, wherein the second output terminal of the power amplification unit is used to connect to at least some of the antennas in the first antenna group, and the second terminal of the switching unit is used to connect to at least some of the antennas in the first antenna group.

[0173] 17. The radio frequency circuit according to claim 1, wherein, during the uplink time slot of the radio frequency signal, the switching unit is used to turn on the path between the first antenna group and the second output terminal, and to turn off the path between the first antenna group and the low noise amplification unit, and the power amplification unit is used to transmit the power-amplified radio frequency signal to the first antenna group through the switching unit via the second output terminal.

[0174] 18. A radio frequency (RF) front-end device, wherein the RF front-end device is configured with a first RF input port, an RF output port, an auxiliary port, and an antenna port; the RF front-end device includes the RF circuitry as described in any one of claims 1-17; wherein,

[0175] The first RF input port is connected to the input terminal of the power amplifier unit in the RF circuit, the auxiliary port is connected to the first output terminal of the power amplifier unit, the auxiliary port is used to connect to the first antenna group, the RF output port is connected to the output terminal of the low noise amplifier unit in the RF circuit, the antenna port is connected to the second terminal of the switching unit in the RF circuit, and the antenna port is used to connect to the first antenna group.

[0176] 19. The radio frequency front-end device of claim 18, wherein, when the first antenna group includes a first antenna and a second antenna, the auxiliary port is used to connect to the first antenna, and the antenna port is connected to the second antenna.

[0177] 20. The radio frequency front-end device according to claim 18, wherein the radio frequency front-end device further includes a second radio frequency input port, the second radio frequency input port being connected to another first terminal of the switching unit, and the second radio frequency input port being used to connect to the auxiliary port;

[0178] If the first antenna group includes a third antenna, the antenna port is connected to the third antenna.

[0179] 21. The radio frequency front-end device according to claim 18, wherein, when the radio frequency front-end device includes a first filtering unit, the first filtering unit is externally disposed in the radio frequency front-end device, and the radio frequency front-end device has the power amplification unit, the low noise amplification unit and the switching unit built in; wherein, the first filtering unit is connected to the auxiliary port, and the first filtering unit is used to connect to the first antenna group.

[0180] 22. A radio frequency system, comprising a radio frequency transceiver, a first antenna array, and a radio frequency front-end device as described in any one of claims 18-21, wherein the radio frequency transceiver is connected to a first radio frequency input port and a radio frequency output port of the radio frequency front-end device, and the radio frequency transceiver is used to support the transmission and reception of radio frequency signals.

[0181] 23. The radio frequency system according to claim 22, wherein the radio frequency system further includes a receiving circuit and a second antenna group, the receiving circuit being connected to the radio frequency transceiver and the second antenna group respectively, and the receiving circuit being used to support the receiving and processing of radio frequency signals received by the second antenna group.

[0182] 24. A communication device, wherein the communication device includes the radio frequency system as described in claim 22 or 23.

Claims

1. A radio frequency circuit, wherein, The radio frequency circuit includes a power amplifier unit, a switching unit, and a low-noise amplifier unit; wherein... The first output terminal of the power amplifier unit is used to connect to the first antenna group, the second output terminal of the power amplifier unit is connected to a first terminal of the switching unit, and the power amplifier unit is used to support power amplification processing of radio frequency signals. The input terminal of the low-noise amplifier unit is connected to the other first terminal of the switching unit to support low-noise amplification processing of radio frequency signals. The second end of the switching unit is connected to the first antenna group; wherein... During the downlink time slot of the radio frequency signal, the switching unit is used to open the path between the first antenna group and the low noise amplification unit, and to close the path between the first antenna group and the second output terminal. The power amplification unit is used to transmit the power-amplified radio frequency signal to the first antenna group through the first output terminal.

2. The radio frequency circuit of claim 1, wherein, The first antenna group includes a first antenna and a second antenna, wherein the first output terminal is used to connect to the first antenna, and the second terminal of the switching unit is connected to the second antenna; During the downlink time slot of the radio frequency signal, the switching unit is used to turn on the path between the low noise amplifier unit and the second antenna, and to turn off the path between the second output terminal and the second antenna. The power amplifier unit is used to transmit the amplified radio frequency signal to the first antenna through the first output terminal.

3. The radio frequency circuit of claim 1, wherein, The first antenna group includes a third antenna, wherein the second end of the switching unit is connected to the third antenna, and the first output end is used to connect to another first end of the switching unit; The switching unit is a multi-way switch; wherein... During the downlink time slot of the radio frequency signal, the multiple-pass switch is used to open the path between the third antenna and the low-noise amplifier unit, and to open the path between the third antenna and the first output terminal, and to disconnect the path between the third antenna and the second output terminal. The power amplifier unit is used to transmit the amplified radio frequency signal to the multiple-pass switch through the first output terminal, so that the power-amplified radio frequency signal and the radio frequency signal received by the third antenna are aggregated by the multiple-pass switch and then transmitted to the third antenna.

4. The radio frequency circuit of claim 3, wherein, During the uplink time slot of the radio frequency signal, the multiple-pass switch is used to open the path between the third antenna and the second output terminal, and to close the path between the third antenna and the low-noise amplifier unit, as well as to close the path between the third antenna and the first output terminal. The power amplifier unit is used to transmit the power-amplified radio frequency signal to the third antenna through the multiple-pass switch via the second output terminal.

5. The radio frequency circuit of claim 1, wherein, The first antenna group includes a third antenna, wherein the second end of the switching unit is connected to the third antenna, and the first output end is used to connect to another first end of the switching unit; The switching unit is a multi-way switch; wherein... During the downlink time slot of the radio frequency signal, the multi-pass switch is used to open the path between the third antenna and the low-noise amplifier unit, and to open the path between the third antenna and the first output terminal, and to open the path between the third antenna and the second output terminal. The low-noise amplifier unit is used to perform low-noise amplification processing on the radio frequency signal received by the third antenna.

6. The radio frequency circuit of claim 5, wherein, During the uplink time slot of the radio frequency signal, the multiple-pass switch is used to open the path between the third antenna and the second output terminal, and to close the path between the third antenna and the low-noise amplifier unit, as well as to close the path between the third antenna and the first output terminal. The power amplifier unit is used to transmit the power-amplified radio frequency signal to the third antenna through the multiple-pass switch via the second output terminal.

7. The radio frequency circuit of any of claims 1-6, wherein, The radio frequency circuit further includes a first filtering unit, and the first output terminal is connected to the first antenna group via the first filtering unit. The first filtering unit is used to support filtering processing of the power-amplified radio frequency signal.

8. The radio frequency circuit of claim 7, wherein, The first antenna group includes a first antenna and a second antenna; wherein, The first output terminal is connected to the first antenna via the first filtering unit. The first filtering unit is used to filter the signal output through the first output terminal and transmit it to the first antenna for transmission.

9. The radio frequency circuit of claim 7, wherein, The first antenna group includes a third antenna; wherein, The first output terminal is connected to another first terminal of the switching unit via the first filtering unit, and then connected to the third antenna via the switching unit. The first filtering unit is used to filter the signal output through the first output terminal and transmit it to the switching unit. The signal is then aggregated with the radio frequency signal received by the third antenna and transmitted by the third antenna.

10. The radio frequency circuit of claim 7, wherein, The first filtering unit includes a digitally adjustable filter.

11. The radio frequency circuit of any of claims 1-6, wherein, The switching unit is also used to time-divisionally connect the path between the first antenna group and the low-noise amplifier unit, as well as the path between the first antenna group and the second output terminal.

12. The radio frequency circuit of any of claims 1-6, wherein, The power amplification unit includes: A first power amplifier is used to support power amplification processing of the radio frequency signal; A first switch, the second end of the first switch being connected to the output terminal of the first power amplifier; a first end of the first switch serving as the first output terminal, and a first end of the first switch being used to connect to the first antenna group; the other first end of the first switch serving as the second output terminal; the first switch being used to open the path between the first output terminal and the first power amplifier and to disconnect the path between the second output terminal and the first power amplifier during the downlink time slot of the radio frequency signal.

13. The radio frequency circuit of claim 12, wherein, During at least a portion of the downlink time slot, the first switch is used to connect the path between the first output terminal and the first power amplifier, and disconnect the path between the second output terminal and the first power amplifier. The switching unit is used to connect the path between the first antenna group and the low-noise amplifier unit. During the remaining time slot of the downlink time slot, the first switch is used to disconnect the path between the first output terminal and the first power amplifier, and to disconnect the path between the second output terminal and the first power amplifier. The switching unit is used to connect the path between the first antenna group and the low noise amplifier unit. During the uplink time slot of the radio frequency signal, the first switch is used to disconnect the path between the first output terminal and the first power amplifier, and to connect the path between the second output terminal and the first power amplifier. The switching unit is used to connect the path between the second output terminal and the first antenna group.

14. The radio frequency circuit of claim 12, wherein, During the downlink time slot, the first switch is used to disconnect the path between the first output terminal and the first power amplifier, and to disconnect the path between the second output terminal and the first power amplifier. The switching unit is used to connect the path between the first antenna group and the low-noise amplifier unit. During the uplink time slot of the radio frequency signal, the first switch is used to disconnect the path between the first output terminal and the first power amplifier, and to connect the path between the second output terminal and the first power amplifier. The switching unit is used to disconnect the path between the first antenna group and the low noise amplifier unit.

15. The radio frequency circuit of any one of claims 1-6, wherein, The radio frequency circuit also includes: The second filtering unit is connected to the first antenna group via a first terminal of the switching unit. The second filtering unit is used to support filtering of the power-amplified radio frequency signal and to support filtering of the radio frequency signal received by the first antenna group.

16. The radio-frequency circuit according to claim 1 or 2, wherein The first antenna group includes multiple antennas, wherein the second output terminal of the power amplifier unit is used to connect to at least some of the antennas in the first antenna group, and the second terminal of the switch unit is used to connect to at least some of the antennas in the first antenna group.

17. The radio-frequency circuit of claim 1, wherein, During the uplink time slot of the radio frequency signal, the switching unit is used to open the path between the first antenna group and the second output terminal, and to close the path between the first antenna group and the low noise amplification unit. The power amplification unit is used to transmit the power-amplified radio frequency signal to the first antenna group through the switching unit via the second output terminal.

18. A radio frequency front end device, wherein, The radio frequency front-end device is configured with a first radio frequency input port, a radio frequency output port, an auxiliary port, and an antenna port; the radio frequency front-end device includes the radio frequency circuit as described in any one of claims 1-17; wherein... The first RF input port is connected to the input terminal of the power amplifier unit in the RF circuit, the auxiliary port is connected to the first output terminal of the power amplifier unit, the auxiliary port is used to connect to the first antenna group, the RF output port is connected to the output terminal of the low noise amplifier unit in the RF circuit, the antenna port is connected to the second terminal of the switching unit in the RF circuit, and the antenna port is used to connect to the first antenna group.

19. The radio frequency front-end device of claim 18, wherein, In the case where the first antenna group includes a first antenna and a second antenna, the auxiliary port is used to connect to the first antenna, and the antenna port is connected to the second antenna.

20. The radio frequency front-end device of claim 18, wherein, The radio frequency front-end device further includes a second radio frequency input port, which is connected to another first terminal of the switching unit, and is used to connect to the auxiliary port; If the first antenna group includes a third antenna, the antenna port is connected to the third antenna.

21. The radio frequency front-end device of claim 18, wherein, In the case where the radio frequency front-end device includes a first filtering unit, the first filtering unit is externally located in the radio frequency front-end device, and the radio frequency front-end device has the power amplification unit, the low noise amplification unit, and the switching unit built in; wherein, the first filtering unit is connected to the auxiliary port, and the first filtering unit is used to connect to the first antenna group.

22. A radio frequency system, wherein, It includes a radio frequency transceiver, a first antenna group, and a radio frequency front-end device as described in any one of claims 18-21, wherein the radio frequency transceiver is connected to a first radio frequency input port and a radio frequency output port of the radio frequency front-end device, and the radio frequency transceiver is used to support the transmission and reception of radio frequency signals.

23. The radio frequency system of claim 22, wherein, The radio frequency system further includes a receiving circuit and a second antenna group. The receiving circuit is connected to the radio frequency transceiver and the second antenna group respectively. The receiving circuit is used to support the reception and processing of radio frequency signals received by the second antenna group.

24. A communications device, comprising: The communication device includes the radio frequency system as described in claim 22 or 23.

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