Radio frequency front-end circuit and radio frequency generating device

Abstract

This application provides a radio frequency (RF) front-end circuit and an RF generator, belonging to the field of mobile communication technology. The transceiver module's transmit port is connected to the input of the transmit module, and the output of the transmit module is connected to a switch module. The main / diversity receiving ports of the transceiver module are both connected to the output of the receive module, and the input of the receive module is connected to a bidirectional transmission module and a switch module. The bidirectional transmission module is also connected to the output of the transmit module and to the switch module. The switch module is also connected to an antenna. The receive module is used to split the RF signal acquired by the antenna into a main path signal and a diversity signal, and transmit the main path signal or diversity signal to the corresponding main receiving port or diversity receiving port. This application can achieve the effects of eliminating the constraints of auxiliary antennas, improving the operating speed of a single antenna, and reducing the overall production cost.

Description

Technical Field

[0001] This application relates to the field of mobile communication technology, and more specifically, to a radio frequency front-end circuit and a radio frequency generator. Background Technology

[0002] In Long-Term Evolution (LTE) networks, Category 4 (CAT4) is the core standard for the wireless performance level of terminal devices, defining the maximum uplink and downlink rates, frequency band bandwidth, antenna technology, and other capabilities supported by the terminal devices.

[0003] Currently, CAT4 operation is generally achieved by combining a main antenna and an auxiliary antenna. The main antenna acts as a transceiver (TRX), with a transmit path (TX) and a primary receive path (PRX) between the main antenna and the transceiver. The auxiliary antenna acts as a discontinuous reception (DRX), with a diversity reception path (DRX) between the auxiliary antenna and the transceiver. The PRX serves as the primary receiving path for the radio frequency signals captured by the antenna, while the DRX supplements the PRX to assist the PRX in receiving the radio frequency signals captured by the antenna, thereby meeting the uplink and downlink rate requirements of the terminal equipment.

[0004] However, when data interaction between terminal devices and base stations is conducted using related technologies, reducing the number of auxiliary antennas will place all the signal reception pressure on the main receiving path, significantly reducing the downlink rate of the RF front-end circuit and thus affecting the stability of data interaction between the terminal device and the base station. Therefore, the related technology suffers from the problem that the CAT4 downlink rate is limited by the auxiliary antennas. Utility Model Content

[0005] The purpose of this application is to provide a radio frequency front-end circuit and a radio frequency generator that can achieve the effects of freeing the device from the constraints of auxiliary antennas, increasing the operating speed of a single antenna, and reducing the overall production cost.

[0006] The embodiments of this application are implemented as follows: A first aspect of the present application provides a radio frequency front-end circuit, which includes: a transceiver module, a transmitting module, a bidirectional transmitting module, a receiving module, and a switching module. The transceiver module is provided with a transmitting port and multiple receiving ports. The multiple receiving ports include: at least one main receiving port and diversity receiving ports corresponding to the main receiving port. The transmitting port of the transceiver module is connected to the input of the transmitting module, and the first output of the transmitting module is connected to the first end of the switch module. Each main receiving port and each diversity receiving port of the transceiver module are connected to the output of the receiving and transmitting module. The first input of the receiving and transmitting module is connected to the first end of the bidirectional transmission module, and the second input of the receiving and transmitting module is connected to the second end of the switching module. The second end of the bidirectional transmission module is connected to the second output end of the transmitting module, and the third end of the bidirectional transmission module is connected to the third end of the switching module. The fourth terminal of the switch module is connected to the antenna; The receiving and transmitting module is used to split the radio frequency signal acquired by the antenna into a main path signal and a diversity signal, and transmit the main path signal to the corresponding main receiving port and the diversity signal to the corresponding diversity receiving port.

[0007] As one possible implementation, the aforementioned multiple receiving ports include: a first main receiving port, a second main receiving port, a first diversity receiving port, and a second diversity receiving port; The first main receiving port, the second main receiving port, the first diversity receiving port, and the second diversity receiving port are all connected to the output of the receiving and transmitting module.

[0008] As one possible implementation, the above-mentioned receiving and transmitting module includes: a first power divider module, a second power divider module, and a first filter; The input terminal of the first power divider module is connected to the first terminal of the bidirectional transmission module, the first output terminal of the first power divider module is connected to the first main receiving port of the transceiver module, and the second output terminal of the first power divider module is connected to the first diversity receiving port of the transceiver module. The input terminal of the first filter is connected to the second terminal of the switching module, the output terminal of the first filter is connected to the input terminal of the second power divider module, the first output terminal of the second power divider module is connected to the second main receiving port, and the second output terminal of the second power divider module is connected to the second diversity receiving port.

[0009] As one possible implementation, the first power divider module includes: a first resistor, a second resistor, and a third resistor; One end of the first resistor and one end of the second resistor are both connected to the first end of the bidirectional transmission module. The other end of the first resistor is connected to one end of the third resistor and the first main receiving port, respectively. The other end of the second resistor is connected to the other end of the third resistor and the first diversity receiving port, respectively.

[0010] As one possible implementation, the aforementioned first power distribution module also includes: a first capacitor and a second capacitor; One end of the first capacitor is connected to one end of the first resistor and one end of the second resistor, and the other end of the first capacitor is grounded. One end of the second capacitor is connected to the other end of the first resistor and one end of the third resistor, and the other end of the second capacitor is connected to the other end of the second resistor and the other end of the third resistor.

[0011] As one possible implementation, the second power divider module includes: a fourth resistor, a fifth resistor, and a sixth resistor; One end of the fourth resistor and one end of the fifth resistor are both connected to the output of the first filter. The other end of the fourth resistor is connected to one end of the sixth resistor and the second main receiving port, respectively. The other end of the fifth resistor is connected to the other end of the sixth resistor and the second diversity receiving port, respectively.

[0012] As one possible implementation, the aforementioned second power distribution module also includes: a third capacitor and a fourth capacitor; One end of the third capacitor is connected to one end of the fourth resistor and one end of the fifth resistor, and the other end of the third capacitor is grounded. One end of the fourth capacitor is connected to the other end of the fourth resistor and one end of the sixth resistor, and the other end of the fourth capacitor is connected to the other end of the fifth resistor and the other end of the sixth resistor.

[0013] As one possible implementation, the bidirectional transmission module described above includes: a duplexer; The input terminal of the duplexer is connected to the second output terminal of the transmitting module, the bidirectional transmission terminal of the duplexer is connected to the third terminal of the switching module, and the transmitting terminal of the duplexer is connected to the input terminal of the first power divider module.

[0014] As one possible implementation, the above-mentioned transmission module includes: a power amplifier and a second filter; The input terminal of the power amplifier is connected to the transmit port of the transceiver module, the first output terminal of the power amplifier is connected to the input terminal of the second filter, and the second output terminal of the power amplifier is connected to the input terminal of the duplexer. The output of the second filter is connected to the first terminal of the switching module.

[0015] A second aspect of this application provides a radio frequency (RF) generator, which includes the RF front-end circuit described in the first aspect.

[0016] The beneficial effects of the embodiments of this application include: This application provides a radio frequency (RF) front-end circuit that uses a single antenna to achieve RF signal interaction between the antenna and the transceiver. The third terminal of the bidirectional transmission module is connected to the third terminal of the switch module, the antenna is connected to the fourth terminal of the switch module, the transmit port of the transceiver module is connected to the input terminal of the transmit / transmit module, the first output terminal of the transmit / transmit module is connected to the first terminal of the switch module, the second output terminal of the transmit / transmit module is connected to the second terminal of the bidirectional transmission module, and the third terminal of the bidirectional transmission module is connected to the third terminal of the switch module. The transceiver module forms a transmission path via the transmit port, the transmit / transmit module, the bidirectional transmission module, and the switch module, transmitting the RF signal between the transceiver module and the transceiver through the transmission path. The baseband radio frequency (RF) signal generated within the transceiver module is transmitted to the antenna for radiation. Each main receiving port and each diversity receiving port of the transceiver module is connected to the output of the receiving and transmitting module. The first input of the receiving and transmitting module is connected to the first end of the bidirectional transmission module, and the second input of the receiving and transmitting module is connected to the second end of the switching module. The main receiving port, diversity receiving port, receiving and transmitting module, bidirectional transmission module, and switching module form the receiving path. The receiving and transmitting module receives the RF signal acquired by the antenna and splits it into a main path signal and a diversity signal. The main path signal is sent to the corresponding main receiving port, and the diversity signal is sent to the corresponding diversity receiving port. Therefore, this application only uses one antenna to receive the RF signal emitted by the signal source, and the receiving and transmitting module splits the RF signal acquired by the antenna into two and transmits them to the corresponding main receiving port and diversity receiving port. Uplink and downlink rate requirements can be met without the intervention of a diversity antenna. This achieves the effect of eliminating the constraints of auxiliary antennas, increasing the operating rate of a single antenna, and reducing the overall production cost. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of a conventional radio frequency front-end circuit. Figure 2 This is a schematic diagram of the structure of a first type of radio frequency front-end circuit provided in an embodiment of this application; Figure 3 This is a schematic diagram of the structure of a second radio frequency front-end circuit provided in an embodiment of this application; Figure 4 This is a schematic diagram of the structure of a third radio frequency front-end circuit provided in the embodiments of this application; Figure 5This is a schematic diagram of the structure of a radio frequency generator provided in an embodiment of this application.

[0019] Reference numerals: 10: RF front-end circuit; 101: Transceiver module; 102: Transmitting module; 1021: Power amplifier; 1022: Second filter; 103: Bidirectional transmission module; 1031: Duplexer; 104: Receiving module; 1041: First power divider module; 411: First resistor; 412: Second resistor; 413: Third resistor; 414: First capacitor; 415: Second capacitor; 1042: Second power divider module; 421: Fourth resistor; 422: Fifth resistor; 423: Sixth resistor; 424: Third capacitor; 425: Fourth capacitor; 1043: First filter; 105: Switching module; 30: Antenna; 20: RF generator. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0022] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0023] In the description of this application, it should be noted that the terms "first," "second," "third," "fourth," "fifth," and "sixth," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance. It should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0024] Figure 1 Here is a schematic diagram of a conventional radio frequency front-end circuit. (See attached diagram) Figure 1 CAT4 operation relies on a combination of a main antenna and an auxiliary antenna to transmit and receive radio frequency signals. The transceiver has a transmit port TX to transmit the radio frequency signals generated by the transceiver to the first main antenna via the transmit path, and then radiate them through the first main antenna. The transceiver also has two main receive ports PRX1 and PRX2, and diversity receive ports DRX1 and DRX2 that correspond one-to-one with the main receive ports.

[0025] Furthermore, the main receiving port serves as the receiving path for the RF signal from the first main antenna, and the diversity receiving port serves as the receiving path for the RF signal from the second auxiliary antenna. Both the first main antenna and the second auxiliary antenna are used to receive RF signals from the same signal source. The first main antenna acts as the primary receiving path for the RF signal, and the second auxiliary antenna acts as an auxiliary receiving path. The RF signal received by the first main antenna is transmitted to the transceiver via the main receiving port, and the RF signal received by the second auxiliary antenna is transmitted to the transceiver via the diversity receiving port. The second auxiliary antenna can improve the receiving performance of the RF front-end circuit. The RF signals acquired by the first main antenna and the second auxiliary antenna may be RF signals emitted by the signal source through different channels.

[0026] In addition, wireless communication often uses a combination of Time Division Duplex (TDD) and Frequency Division Duplex (FDD) to achieve bidirectional communication (i.e., uplink and downlink communication links). TDD is mainly used for time separation, while FDD is mainly used for frequency separation. When TDD separates the radio frequency (RF) signal by time, the uplink and downlink communication links use the same frequency, meaning they share the current frequency. Only a rapid switching switch is needed to periodically switch time slots, allowing the RF signal to be transmitted alternately in different time periods, without the need for a duplexer for frequency isolation. When FDD separates the RF signal by frequency, the uplink and downlink communication links use different frequencies to transmit the RF signal simultaneously. The uplink communication link has a corresponding uplink frequency, and the downlink communication link has a corresponding downlink frequency. In this case, a duplexer is needed to isolate the uplink and downlink frequencies, but switching time slots is not required.

[0027] Furthermore, in the dual-antenna RF circuits provided by the prior art, the baseband RF signal generated by the controller in the transceiver based on Time Division Duplex (TDD) is amplified by a power amplifier, the amplified baseband RF signal is denoised by a filter, and finally sent to the antenna via a switching module, and then the RF signal is radiated out by the antenna; the baseband RF signal generated by the controller in the transceiver based on Frequency Division Duplex (FDD) is amplified by a power amplifier, the amplified baseband RF signal is frequency isolated by a duplexer and divided into uplink and downlink transmission signals, and finally sent to the antenna via a switching module, and then the RF signal is radiated out by the antenna.

[0028] Secondly, the first main antenna and the second auxiliary antenna receive radio frequency (RF) signals from the same signal source. The RF signals acquired by the first main antenna enter the corresponding main receiving ports PRX1 and PRX2 via the switching module, and the RF signals acquired by the second auxiliary antenna enter the corresponding diversity receiving ports DRX1 and DRX2 via the switching module. When the first main antenna acquires a frequency division duplex (FDD) RF signal, the FDD RF signal enters the duplexer via the switching module for frequency separation, and is then transmitted to the main receiving port PRX1 after frequency separation. When the first main antenna acquires a time division duplex (TDD) RF signal, the TDD RF signal enters the filter via the switching module for filtering, and is then transmitted to the main receiving port PRX2 via the filter. When the second auxiliary antenna acquires a frequency division duplex (FDD) RF signal, the FDD RF signal enters the filter via the switching module, and is then input to the diversity receiving port DRX1 via the filter. When the second auxiliary antenna acquires a time division duplex (TDD) RF signal, the TDD RF signal enters the filter via the switching module, and is then input to the diversity receiving port DRX2 via the filter.

[0029] Therefore, the second auxiliary antenna is mainly used to collect radio frequency (RF) signals not collected by the first main antenna. The second auxiliary antenna, switching module, filter, and diversity receiving port form a diversity receiving path, which shares the RF signals received by the antenna to meet the user's uplink and downlink rate requirements. If the second auxiliary antenna is missing or damaged, the RF front-end circuit will be unable to capture RF signals transmitted through other paths. This will cause all RF signal transmission pressure to be applied to the main receiving path, resulting in a decrease in the RF signal transmission rate of the main receiving path, thus affecting the communication stability between the terminal device and the base station.

[0030] Therefore, in this dual-antenna RF front-end circuit, the downlink rate of the RF front-end circuit is limited by the auxiliary antenna.

[0031] To address this, this application provides a radio frequency (RF) front-end circuit that enables RF signal transmission between a base station and a terminal device via a single wire. Each main receiving port and each diversity receiving port of the transceiver module is connected to the output of the receiving and transmitting module. The first input of the receiving and transmitting module is connected to the first end of the bidirectional transmission module, and the second input is connected to the second end of the switching module. Specifically, the receiving and transmitting module receives time-division duplex (TDD) RF signals acquired by the antenna via its second input and frequency-division duplex (FDCD) RF signals acquired by the antenna via its first input. The receiving and transmitting module then divides the TDD and FDCD RF signals into corresponding main path signals and diversity signals, transmitting the main path signals to the corresponding main receiving ports and the diversity signals to the corresponding diversity receiving ports. This approach eliminates the need for auxiliary antennas, increases the operating speed of a single antenna, and reduces the overall production cost.

[0032] It is worth noting that the uplink rate refers to the rate at which the terminal device sends radio frequency signals to the base station, while the downlink rate refers to the rate at which the antenna receives the radio frequency signals sent by the base station and transmits them to the terminal device.

[0033] The radio frequency front-end circuit and radio frequency generating device provided in the embodiments of this application will be explained in detail below with reference to the accompanying drawings.

[0034] Figure 2 A schematic diagram of a radio frequency front-end circuit provided in this application is shown below. Figure 2 The radio frequency front-end circuit 10 provided in this application embodiment includes: a transceiver module 101, a transmitting module 102, a bidirectional transmitting module 103, a receiving module 104, and a switch module 105. The transceiver module 101 is provided with a transmitting port and multiple receiving ports. The multiple receiving ports include: at least one main receiving port and a diversity receiving port corresponding to the main receiving port.

[0035] The transmitting port of the transceiver module 101 is connected to the input of the transmitting module 102, and the first output of the transmitting module 102 is connected to the first end of the switch module 105.

[0036] Optionally, the transceiver module 101 specifically refers to the transceiver in the radio frequency front-end circuit 10. The transmit port TX is mainly used to send the baseband radio frequency signal generated by the controller in the transceiver module 101 to the antenna 30, and the antenna 30 radiates the received baseband radio frequency signal.

[0037] Optionally, the first end of the switch module 105 serves as an input end of the switch module, and the transceiver module 101 transmits the baseband radio frequency signal generated internally to the switch module 105 via the transmission module 102 through the transmission port TX.

[0038] Each main receiving port and each diversity receiving port of the transceiver module 101 are connected to the output of the receiving and transmitting module 104. The first input of the receiving and transmitting module 104 is connected to the first end of the bidirectional transmission module 103, and the second input of the receiving and transmitting module 104 is connected to the second end of the switch module 105.

[0039] Optionally, the transceiver module 101 is also equipped with multiple receiving ports RX, which are divided into a main receiving port PRX and a diversity receiving port DRX. The main receiving port PRX serves as the primary receiving port for the radio frequency signals acquired by the antenna, while the diversity receiving port DRX serves as an auxiliary receiving port for the radio frequency signals acquired by the antenna.

[0040] Optionally, each main receiving port (PRX) and each diversity receiving port (DRX) of the transceiver module 101 is connected to the output of the receiving and transmitting module 104. The first input of the receiving and transmitting module 104 is connected to the first end of the bidirectional transmission module 103, and the second input of the receiving and transmitting module 104 is connected to the second end of the switch module 105. The second end of the switch module 105 serves as both an input and an output. That is, when the transceiver module 101 transmits baseband radio frequency signals to the antenna 30 via the bidirectional transmission module 103, the second end of the switch module 105 acts as an input; when the transceiver module 101 receives radio frequency signals acquired by the antenna via the switch module 105, the second end of the switch module 105 acts as an output. Furthermore, the first end of the bidirectional transmission module 103 serves as its output, and the receiving and transmitting module 104 acquires the radio frequency signals transmitted by the antenna 30 via its first and second inputs.

[0041] The second end of the bidirectional transmission module 103 is connected to the second output end of the transmission module 102, and the third end of the bidirectional transmission module 103 is connected to the third end of the switch module 105.

[0042] Optionally, the second end of the bidirectional transmission module 103 is connected to the second output end of the transmission module 102. The second end of the bidirectional transmission module 103 serves as an input of the bidirectional transmission module 103 and is used to receive the baseband radio frequency signal output by the transmission module 102.

[0043] Optionally, the third terminal of the bidirectional transmission module 103 is connected to the third terminal of the switch module 105. The third terminal of the bidirectional transmission module 103 can be either an input terminal or an output terminal. When the bidirectional transmission module 103 is used to transmit the baseband radio frequency signal output by the transceiver module 101 via the transmitting module 102 to the antenna 30, the third terminal of the bidirectional transmission module 103 is an output terminal; conversely, when the bidirectional transmission module 103 is used to transmit the radio frequency signal collected by the antenna 30 to the transceiver module 101, the third terminal of the bidirectional transmission module 103 is an input terminal.

[0044] The fourth terminal of the switch module 105 is connected to the antenna 30.

[0045] Optionally, the fourth terminal of the switch module 105 can be either an input terminal or an output terminal. When the switch module 105 is used to transmit the baseband radio frequency signal output by the transceiver module 101 to the antenna 30 for radiation, the fourth terminal of the switch module 105 is the output terminal; when the switch module 105 is used to transmit the radio frequency signal collected by the antenna 30 to the transceiver module 101, the fourth terminal of the switch module 105 is the input terminal.

[0046] Optionally, the switch module 105 is equipped with multiple switching switches, which are mainly used to switch the transmission time slots of time division duplex (TDD) radio frequency signals. This application does not specifically limit this.

[0047] The receiving and transmitting module 104 is used to split the radio frequency signal acquired by the antenna 30 into a main path signal and a diversity signal, and transmit the main path signal to the corresponding main receiving port PRX, and transmit the diversity signal to the corresponding diversity receiving port DRX.

[0048] Optionally, the receiving and transmitting module 104 is used to divide the received radio frequency signal into a main path signal and a diversity signal, and transmit the main path signal to the corresponding main receiving port PRX, and transmit the diversity signal to the corresponding diversity receiving port DRX. Here, the main path signal refers to the radio frequency signal collected by the antenna 30 from the main propagation path, and the diversity signal refers to the radio frequency signal collected by the antenna 30 from an independent propagation path other than the main propagation path.

[0049] It is worth noting that the main path signal is primarily used for demodulating core communication data, while the diversity signal is used to provide redundant signals for anti-aging.

[0050] In this embodiment, a single antenna is used to achieve radio frequency signal interaction between the antenna and the transceiver. The third terminal of the bidirectional transmission module is connected to the third terminal of the switch module, the antenna is connected to the fourth terminal of the switch module, the transmitting port of the transceiver module is connected to the input terminal of the transmitting module, the first output terminal of the transmitting module is connected to the first terminal of the switch module, the second output terminal of the transmitting module is connected to the second terminal of the bidirectional transmission module, and the third terminal of the bidirectional transmission module is connected to the third terminal of the switch module. The transceiver module forms a transmission path via the transmitting port, the transmitting module, the bidirectional transmission module, and the switch module, transmitting the signals generated internally by the transceiver module through this path. The baseband radio frequency signal is transmitted to the antenna for radiation. Each main receiving port and each diversity receiving port of the transceiver module is connected to the output of the receiving and transmission module. The first input of the receiving and transmission module is connected to the first end of the bidirectional transmission module, and the second input of the receiving and transmission module is connected to the second end of the switching module. The main receiving port, diversity receiving port, receiving and transmission module, bidirectional transmission module, and switching module form the receiving path. The receiving and transmission module receives the radio frequency signal acquired by the antenna and splits the radio frequency signal into a main path signal and a diversity signal. The main path signal is sent to the corresponding main receiving port, and the diversity signal is sent to the corresponding diversity receiving port. Therefore, this application only uses one antenna to receive the radio frequency signal emitted by the signal source, and the receiving and transmission module splits the radio frequency signal acquired by the antenna into two and transmits them to the corresponding main receiving port and diversity receiving port. Uplink and downlink rate requirements can be met without the intervention of a diversity antenna. This achieves the effect of eliminating the constraints of auxiliary antennas, increasing the operating rate of a single antenna, and reducing the overall production cost.

[0051] In one alternative implementation, see [link to implementation details]. Figure 3 The multiple receiving ports RX on the transceiver module 101 in the radio frequency front-end circuit 10 provided in this application embodiment include: a first main receiving port PRX1, a second main receiving port PRX2, a first diversity receiving port DRX1, and a second diversity receiving port DRX2.

[0052] The first main receiving port PRX1, the second main receiving port PRX2, the first diversity receiving port DRX1, and the second diversity receiving port DRX2 are all connected to the output of the receiving and transmitting module 104.

[0053] Optionally, since the RF front-end circuit 10 is often used in both time-division duplex and frequency-division duplex network scenarios, the RF signals received and transmitted by the RF front-end circuit 10 also have both time-division duplex and frequency-division duplex forms. Therefore, the transceiver module 101 needs to be set up with corresponding receiving ports to receive different forms of RF signals.

[0054] Optionally, the first main receiving port PRX1 is mainly used to receive the main path signal of frequency division duplex, and correspondingly, the first diversity receiving port DRX1 is used to receive the diversity signal of frequency division duplex; similarly, the second main receiving port PRX2 is mainly used to receive the main path signal of time division duplex, and correspondingly, the second diversity receiving port DRX2 is used to receive the diversity signal of time division duplex.

[0055] Furthermore, since the frequency division duplex radio frequency signal needs to be frequency isolated by the bidirectional transmission module 103, while the time division duplex radio frequency signal does not need to be frequency isolated by the bidirectional transmission module 103, the power divider module connected to the receiving port that receives the main path signal and diversity signal of the frequency division duplex needs to establish a connection with the bidirectional transmission module 103, while the power divider module connected to the receiving port that receives the main path signal and diversity signal of the time division duplex does not need to establish a connection with the bidirectional transmission module 103.

[0056] In one alternative implementation, see [link to implementation details]. Figure 3 The receiving and transmitting module 104 in the radio frequency front-end circuit 10 provided in this application embodiment includes: a first power divider module 1041, a second power divider module 1042, and a first filter 1043.

[0057] The input terminal of the first power divider module 1041 is connected to the first terminal of the bidirectional transmission module 103, the first output terminal of the first power divider module 1041 is connected to the first main receiving port PRX1 of the transceiver module 101, and the second output terminal of the first power divider module 1041 is connected to the first diversity receiving port DRX1 of the transceiver module 101.

[0058] Optionally, the input terminal of the first power divider module 1041 is connected to the output terminal of the bidirectional transmission module 103, that is, the first power divider module 1041 obtains the frequency division duplex radio frequency signal collected by the antenna 30 through the bidirectional transmission module 103.

[0059] Optionally, the first output terminal of the first power divider module 1041 is connected to the first main receiving port PRX1, and the second output terminal of the first power divider module 1041 is connected to the first diversity receiving port DRX1. That is, the first power divider module 1041 is used to divide the frequency division duplex radio frequency signal obtained from the bidirectional transmission module 103 into a frequency division duplex main path signal and a frequency division duplex diversity signal, and send the frequency division duplex main path signal to the first main receiving port PRX1 and send the frequency division duplex diversity signal to the first diversity receiving port DRX1.

[0060] The input terminal of the first filter 1043 is connected to the second terminal of the switch module 105, the output terminal of the first filter 1043 is connected to the input terminal of the second power divider module 1042, the first output terminal of the second power divider module 1042 is connected to the second main receiving port PRX2, and the second output terminal of the second power divider module 1042 is connected to the second diversity receiving port DRX2.

[0061] Optionally, the input terminal of the first filter 1043 is connected to the second terminal of the switch module 105, and the output terminal of the first filter 1043 is connected to the input terminal of the second power divider module 1042. The first filter 1043 receives the time-division duplex radio frequency signal collected by the antenna 30 through the switch module 105, and transmits the time-division duplex radio frequency signal to the second power divider module 1042 after filtering and noise reduction.

[0062] Optionally, the first output terminal of the second power divider module 1042 is connected to the second main receiving port PRX2, and the second output terminal of the second power divider module 1042 is connected to the second diversity receiving port DRX2. That is, the second power divider module 1042 is used to divide the time-division duplex radio frequency signal obtained from the first filter 1043 into a time-division duplex main path signal and a time-division duplex diversity signal, and send the time-division duplex main path signal to the second main receiving port PRX2, and send the time-division duplex diversity signal to the second diversity receiving port DRX2.

[0063] In one alternative implementation, see [link to implementation details]. Figure 4 The first power divider module 1041 in the receiving and transmitting module 104 of the radio frequency front-end circuit 10 provided in this application embodiment includes: a first resistor 411, a second resistor 412, a third resistor 413, a first capacitor 414, and a second capacitor 415.

[0064] One end of the first resistor 411 and one end of the second resistor 412 are both connected to the first end of the bidirectional transmission module 103. The other end of the first resistor 411 is connected to one end of the third resistor 413 and the first main receiving port PRX1, respectively. The other end of the second resistor 412 is connected to the other end of the third resistor 413 and the first diversity receiving port DRX1, respectively.

[0065] One end of the first capacitor 414 is connected to one end of the first resistor 411 and one end of the second resistor 412, and the other end of the first capacitor 414 is grounded; one end of the second capacitor 415 is connected to the other end of the first resistor 411 and one end of the third resistor 413, and the other end of the second capacitor 415 is connected to the other end of the second resistor 412 and the other end of the third resistor 413.

[0066] Optionally, the first power divider module 1041 separates the received frequency division duplex radio frequency signal via a first resistor 411, a second resistor 412, a third resistor 413, a first capacitor 414, and a second capacitor 415 to obtain the frequency division duplex main path signal and the frequency division duplex diversity signal.

[0067] The first power divider module 1041 acquires the frequency-division duplex radio frequency (RF) signal collected by the antenna 30 from the first end of the bidirectional transmission module 103 via one end of the first resistor 411 and one end of the second resistor 412. It then performs equal power distribution on the RF signal via the first resistor 411 and the second resistor 412, and performs destructive interference on the reverse signal via the connected third resistor 413, thereby achieving high isolation. Furthermore, the first capacitor 414 can suppress resonance caused by high-frequency parasitic effects and improve the low-frequency matching effect of the RF signal; the second capacitor 415 can enhance the high-frequency isolation between the first main receiving port PRX1 and the first diversity receiving port DRX1, and also balance the phase response between them.

[0068] In one alternative implementation, see [link to implementation details]. Figure 4 The second power divider module 1042 in the receiving and transmitting module 104 of the radio frequency front-end circuit 10 provided in this application embodiment includes: a fourth resistor 421, a fifth resistor 422, a sixth resistor 423, a third capacitor 424, and a fourth capacitor 425.

[0069] One end of the fourth resistor 421 and one end of the fifth resistor 422 are both connected to the output of the first filter 1043. The other end of the fourth resistor 421 is connected to one end of the sixth resistor 423 and the second main receiving port PRX2, respectively. The other end of the fifth resistor 422 is connected to the other end of the sixth resistor 423 and the second diversity receiving port DRX2, respectively.

[0070] One end of the third capacitor 424 is connected to one end of the fourth resistor 421 and one end of the fifth resistor 422, and the other end of the third capacitor 424 is grounded; one end of the fourth capacitor 425 is connected to the other end of the fourth resistor 421 and one end of the sixth resistor 423, and the other end of the fourth capacitor 425 is connected to the other end of the fifth resistor 422 and the other end of the sixth resistor 423.

[0071] Optionally, the second power divider module 1042 separates the received time-division duplex radio frequency signal via a fourth resistor 421, a fifth resistor 422, a sixth resistor 423, a third capacitor 424, and a fourth capacitor 425 to obtain the time-division duplex main path signal and the time-division duplex diversity signal.

[0072] The second power divider module 1042 acquires the time-division duplex radio frequency (RF) signal collected by the antenna 30 from the output of the first filter 1043 via one end of the fourth resistor 421 and one end of the fifth resistor 422. It then performs equal power distribution on this RF signal via the fourth and fifth resistors 421 and 422, and performs destructive interference on the reverse signal via the connected sixth resistor 423, thereby achieving high isolation. Furthermore, the third capacitor 424 suppresses resonance caused by high-frequency parasitic effects and improves the low-frequency matching of the RF signal; the fourth capacitor 425 enhances the high-frequency isolation between the second main receiving port PRX2 and the second diversity receiving port DRX2, and also balances their phase response.

[0073] In one alternative implementation, see [link to implementation details]. Figure 3 The bidirectional transmission module 103 in the radio frequency front-end circuit 10 provided in this application embodiment includes: a duplexer 1031.

[0074] The input terminal of the duplexer 1031 is connected to the second output terminal of the transmission module 102, the bidirectional transmission terminal of the duplexer 1031 is connected to the third terminal of the switch module 105, and the transmission terminal of the duplexer 1031 is connected to the input terminal of the first power divider module 1041.

[0075] Optionally, the input terminal of the duplexer 1031 is connected to the second output terminal of the transmitting module 102. The duplexer 1031 receives the frequency-division duplex baseband radio frequency signal output by the transceiver module 101 via the second output terminal of the transmitting module 102, and performs frequency separation on the baseband radio frequency signal.

[0076] Optionally, the bidirectional transmission end of the duplexer 1031 is connected to the third end of the switch module 105, and the output end of the duplexer 1031 is connected to the input end of the first power divider module 1041. Thus, the bidirectional transmission end of the duplexer 1031 can transmit the frequency-separated baseband RF signal to the switch module 105, and can also obtain the frequency-division duplexed RF signal collected by the antenna 30 from the switch module 105 and transmit this RF signal to the first power divider module 1041.

[0077] In one alternative implementation, see [link to implementation details]. Figure 3 The transmitting module 102 in the radio frequency front-end circuit 10 provided in this application embodiment includes: a power amplifier 1021 and a second filter 1022.

[0078] The input terminal of the power amplifier 1021 is connected to the transmit port TX of the transceiver module 101, the first output terminal of the power amplifier 1021 is connected to the input terminal of the second filter 1022, the second output terminal of the power amplifier 1021 is connected to the input terminal of the duplexer 1031, and the output terminal of the second filter 1022 is connected to the first terminal of the switch module 105.

[0079] Optionally, the power amplifier 1021 amplifies the low-power baseband RF signal emitted from the transmit port TX of the transceiver module 101, sends the amplified time-division duplex baseband RF signal to the second filter 1022 for filtering, sends the amplified frequency-division duplex baseband RF signal to the duplexer 1031 for frequency separation, sends the frequency-separated baseband RF signal to the third terminal of the switch module 105 via the duplexer 1031, sends the filtered time-division duplex baseband RF signal to the first terminal of the switch module 105 via the second filter 1022, and the switch module 105 sends the baseband RF signal emitted by the transceiver module 101 to the antenna 30 for radiation via the fourth terminal.

[0080] Figure 5 A schematic diagram of a radio frequency generator provided in this application is shown below. Figure 5 The radio frequency generator 20 provided in this application embodiment is equipped with the aforementioned radio frequency front-end circuit 10. The radio frequency generator 20 realizes bidirectional communication between the base station and the terminal device through the radio frequency front-end circuit 10. The specific working process and internal structure of the radio frequency front-end circuit 10 are the same as those in the above embodiment, and will not be described again here.

[0081] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

[0082] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A radio frequency front-end circuit, characterized in that, The radio frequency front-end circuit includes: a transceiver module, a transmitting module, a bidirectional transmitting module, a receiving module, and a switching module. The transceiver module is provided with a transmitting port and multiple receiving ports. The multiple receiving ports include: at least one main receiving port and diversity receiving ports corresponding to the main receiving port. The transmitting port of the transceiver module is connected to the input of the transmitting module, and the first output of the transmitting module is connected to the first end of the switch module. Each of the main receiving ports and each of the diversity receiving ports of the transceiver module are connected to the output terminal of the receiving and transmitting module. The first input terminal of the receiving and transmitting module is connected to the first terminal of the bidirectional transmission module, and the second input terminal of the receiving and transmitting module is connected to the second terminal of the switch module. The second end of the bidirectional transmission module is connected to the second output end of the transmitting module, and the third end of the bidirectional transmission module is connected to the third end of the switching module. The fourth terminal of the switch module is connected to the antenna; The receiving and transmitting module is used to split the radio frequency signal acquired by the antenna into a main path signal and a diversity signal, and transmit the main path signal to the corresponding main receiving port and the diversity signal to the corresponding diversity receiving port.

2. The radio frequency front-end circuit of claim 1, wherein, The plurality of receiving ports include: a first main receiving port, a second main receiving port, a first diversity receiving port, and a second diversity receiving port; The first main receiving port, the second main receiving port, the first diversity receiving port, and the second diversity receiving port are all connected to the output of the receiving and transmitting module.

3. The radio frequency front-end circuit of claim 2, wherein, The receiving and transmitting module includes: a first power divider module, a second power divider module, and a first filter; The input terminal of the first power divider module is connected to the first terminal of the bidirectional transmission module, the first output terminal of the first power divider module is connected to the first main receiving port of the transceiver module, and the second output terminal of the first power divider module is connected to the first diversity receiving port of the transceiver module. The input terminal of the first filter is connected to the second terminal of the switching module, the output terminal of the first filter is connected to the input terminal of the second power divider module, the first output terminal of the second power divider module is connected to the second main receiving port, and the second output terminal of the second power divider module is connected to the second diversity receiving port.

4. The radio frequency front-end circuit of claim 3, wherein, The first power divider module includes: a first resistor, a second resistor, and a third resistor; One end of the first resistor and one end of the second resistor are both connected to the first end of the bidirectional transmission module. The other end of the first resistor is connected to one end of the third resistor and the first main receiving port, respectively. The other end of the second resistor is connected to the other end of the third resistor and the first diversity receiving port, respectively.

5. The radio frequency front-end circuit of claim 4, wherein, The first power divider module also includes: a first capacitor and a second capacitor; One end of the first capacitor is connected to one end of the first resistor and one end of the second resistor, and the other end of the first capacitor is grounded; One end of the second capacitor is connected to the other end of the first resistor and one end of the third resistor, and the other end of the second capacitor is connected to the other end of the second resistor and the other end of the third resistor.

6. The radio frequency front-end circuit of claim 3, wherein, The second power divider module includes: a fourth resistor, a fifth resistor, and a sixth resistor; One end of the fourth resistor and one end of the fifth resistor are both connected to the output of the first filter. The other end of the fourth resistor is connected to one end of the sixth resistor and the second main receiving port, respectively. The other end of the fifth resistor is connected to the other end of the sixth resistor and the second diversity receiving port, respectively.

7. The radio frequency front-end circuit of claim 6, wherein, The second power distribution module also includes: a third capacitor and a fourth capacitor; One end of the third capacitor is connected to one end of the fourth resistor and one end of the fifth resistor, and the other end of the third capacitor is grounded. One end of the fourth capacitor is connected to the other end of the fourth resistor and one end of the sixth resistor, and the other end of the fourth capacitor is connected to the other end of the fifth resistor and the other end of the sixth resistor.

8. The radio frequency front-end circuit of claim 3, wherein, The bidirectional transmission module includes: a duplexer; The input terminal of the duplexer is connected to the second output terminal of the transmitting module, the bidirectional transmission terminal of the duplexer is connected to the third terminal of the switching module, and the transmitting terminal of the duplexer is connected to the input terminal of the first power divider module.

9. The radio frequency front-end circuit of claim 8, wherein, The transmission module includes: a power amplifier and a second filter; The input terminal of the power amplifier is connected to the transmit port of the transceiver module, the first output terminal of the power amplifier is connected to the input terminal of the second filter, and the second output terminal of the power amplifier is connected to the input terminal of the duplexer. The output of the second filter is connected to the first terminal of the switching module.

10. A radio frequency generating device, characterized by The radio frequency generating device includes the radio frequency front-end circuit as described in any one of claims 1-9.

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