WIRELESS COMMUNICATIONS SYSTEM, METHOD AND DEVICE, AND DEVICE, AND CHIP

Abstract

The modalities of this application provide a system, method, device, and a wireless communications chip. A frequency band selection circuit is arranged. The frequency band selection circuit can separately route a first radio frequency signal and a second radio frequency signal to a first front-end circuit, a second front-end circuit, or a third front-end circuit, and the first front-end circuit, the second front-end circuit, or the third front-end circuit can perform filtering and / or combining on the first radio frequency signal and the second radio frequency signal, wherein a first radio frequency front-end channel configured to send the first radio frequency signal and a second radio frequency front-end channel configured to send the second radio frequency signal can share a filtering circuit.This allows for the reduction of devices such as a filter and duplexer at a radio frequency front end, thereby reducing the space occupied by a radio frequency front end module.

Description

This application claims priority to Chinese Patent Application No. 202011524419.9, filed with the Chinese National Intellectual Property Administration on December 21, 2020, and entitled “WIRELESS COMMUNICATION SYSTEM, METHOD AND DEVICE, AND DEVICE, AND CHIP”, which is incorporated herein by reference in its entirety. FIELD OF INVENTION This application relates to radio frequency electronic technologies, and in particular, to a wireless communications system, method and device, and a chip. BACKGROUND OF THE INVENTION Non-Standalone (NSA) refers to the coexistence of a 4G base station and a 5G base station on one side of a radio access network. A core network uses a network architecture of either a 4G or a 5G core network. NSA requires the 4G and 5G networks to work together. Dual Connectivity (DC) is a technical foundation for network collaboration. DC can improve the utilization of wireless sources and reduce switching latency. A terminal device must support simultaneous transmission and reception of both 4G and 5G standards. For a terminal device that supports simultaneous dual-standard 4G and 5G transmission and reception, it is necessary to ensure that radio frequency devices on a 4G channel and a 5G channel can work at the same time, and that there is no conflict between channel switches in various antenna switching scenarios or in primary and secondary card working scenarios. However, due to the limited size of the terminal device, it has become an urgent technical problem that must be solved: how to use the limited design space of a radio frequency device to reasonably accommodate a front-end module that ensures that 4G and 5G channels can work simultaneously. BRIEF DESCRIPTION OF THE INVENTION This application provides a wireless communications system, method, device, and chip to reduce the space occupied by a radio frequency front-end module, thereby making the radio frequency front-end module reasonably available. According to a first aspect, one embodiment of this application provides a wireless communication system. The system may include a first power amplifier, a second power amplifier, a frequency band selection circuit, a first front-end circuit, and an antenna module. The first power amplifier and the second power amplifier are separately coupled to the frequency band selection circuit, and the first front-end circuit is separately coupled to both the frequency band selection circuit and the antenna selection circuit.The first power amplifier is configured to perform power amplification on a first radio frequency signal and emit a first amplified radio frequency signal to the frequency band selection circuit, and the second power amplifier is configured to perform power amplification on a second radio frequency signal, and emit a second amplified radio frequency signal to the frequency band selection circuit.The frequency band selection circuit is configured to: route the first amplified RF signal to the first front-end circuit when the first RF signal converges with a first frequency band, and route the second amplified RF signal to the first front-end circuit when the second RF signal converges with a second frequency band, where the first front-end circuit supports both the first and second frequency bands. The first front-end circuit is configured to perform filtering and / or combining at least one of the first amplified RF signal or the second amplified RF signal to obtain a first transmit signal. The antenna module is configured to transmit the first transmit signal. A frequency band selection circuit is provided. This circuit can separately route a first radio frequency signal and a second radio frequency signal to a first front-end circuit. The first front-end circuit then processes the first and second radio frequency signals. A channel configured to send the first radio frequency signal can be considered the first radio frequency front-end channel, and a channel configured to send the second radio frequency signal can be considered the second radio frequency front-end channel.In this system, the first and second RF front-end channels can share front-end circuitry, such as a filter circuit. This allows for a reduction in the number of front-end circuits, such as a filter and duplexer, in a single RF front-end module, thus reducing the space occupied by the RF front-end module. Furthermore, it can be ensured that the primary and secondary RF signals do not interfere with each other. frfrfrenn / eznz / E / YiAi According to a second aspect, one embodiment of this application provides a method of wireless communication. The method may include: performing, by means of a first power amplifier, power amplification of a first radio frequency signal; performing, by means of a second power amplifier, power amplification of a second radio frequency signal; routing, by means of the frequency band selection circuit, the amplified first radio frequency signal to the first front-end circuit when the first radio frequency signal converges with a first frequency band, and routing the amplified second radio frequency signal to the first front-end circuit when the second radio frequency signal converges with a second frequency band, wherein the first front-end circuit supports both the first and second frequency bands;Perform, using the first circuit at the front end, the filtering and / or combination in at least one of the first amplified radio frequency signal or the second amplified radio frequency signal, to obtain a first transmission signal, and transmit, using the antenna module, the first transmission signal. According to a third aspect, one embodiment of this application provides a terminal device, including: a processor, a plurality of antennas, and the wireless communication system as described in the first aspect. The wireless communication system is separately coupled to the processor and the plurality of antennas, and the wireless communication system receives the first and second radio frequency signals from the processor. According to a fourth aspect, one modality of this application provides a processor. The processor is configured to control a wireless communications system to execute the method according to the second aspect. According to a fifth aspect, one modality of this application provides a chip, which includes: a processor and a memory, wherein the memory is configured to store a computer instruction, and the processor is configured to invoke and execute the computer instruction stored in the memory, thereby controlling a wireless communications system to execute the method according to the second aspect. BRIEF DESCRIPTION OF THE DRAWINGS FIGURE 1 is a schematic diagram of a communication system according to one modality of this request. FIGURE 2 is a schematic diagram of a terminal device according to one modality of this application. FIGURE 3 is a schematic diagram of another terminal device according to this request. FIGURE 4 is a schematic diagram of another terminal device according to this request. FIGURE 5 is a schematic diagram of a radio frequency front end module according to one modality of this application. FIGURE 6 is a schematic diagram of another radio frequency front end module according to one modality of this application. FIGURE 7 is a schematic diagram of another radio frequency front end module according to one modality of this application. FIGURE 8 is a schematic diagram of another radio frequency front end module according to one modality of this application. FIGURE 9 is a schematic diagram of a radio frequency front-end module in a scenario according to a modality of this application. FIGURE 10A is a schematic diagram of a radio frequency front-end module in another scenario according to a modality of this application. FIGURE 10B is a schematic diagram of a radio frequency front-end module in another scenario according to a modality of this application. FIGURE 10C is a schematic diagram of a radio frequency front-end module in another scenario according to a modality of this application. FIGURE 10D is a schematic diagram of a radio frequency front-end module in another scenario according to a modality of this application. FIGURE 10E is a schematic diagram of a radio frequency front-end module in another scenario according to a modality of this application. FIGURE 10F is a schematic diagram of a radio frequency front-end module in another scenario according to a modality of this application. FIGURE 10G is a schematic diagram of a radio frequency front-end module in another scenario according to a modality of this application. FIGURE 10H is a schematic diagram of a radio frequency front-end module in another scenario according to a modality of this application. FIGURE 11 is a schematic diagram of a radio frequency front-end module in another scenario according to a modality of this application. FIGURE 12 is a schematic diagram of a radio frequency front-end module in another scenario according to a modality of this application. FIGURE 13 is a schematic diagram of a radio frequency front-end module in another scenario according to a modality of this application. FIGURE 14 is a schematic diagram of a front-end module of frfrfrenn / eznz / E / YiAi radio frequency in another scenario according to a modality of this application. FIGURE 15 is a schematic diagram of a radio frequency front-end module in another scenario according to a modality of this application. FIGURE 16 is a schematic diagram of a radio frequency front-end module in another scenario according to a modality of this application. FIGURE 17 is a schematic diagram of a radio frequency front-end module in another scenario according to a modality of this application. FIGURE 18 is a schematic diagram of a radio frequency front-end module in another scenario according to a modality of this application. FIGURE 19 is a schematic diagram of a radio frequency front-end module in another scenario according to a modality of this application. FIGURE 20 is a schematic diagram of a radio frequency front-end module in another scenario according to a modality of this application. FIGURE 21 is a schematic diagram of a radio frequency front-end module in another scenario according to a modality of this application; and FIGURE 22 is a schematic diagram of a radio frequency front-end module in another scenario according to a modality of this application. DETAILED DESCRIPTION OF THE INVENTION In the forms of this application, terms such as “first” and “second” are used simply to distinguish descriptions, but cannot be construed as indicating or implying relative importance, or an indication or implication of sequence. Furthermore, the terms “comprises,” “includes,” and any other variants thereof mean that they cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a list of steps or units is not necessarily limited to those steps or units that are clearly enumerated, but may include other steps or units not expressly enumerated or inherent in such process, method, system, product, or device. It should be understood that, in this application, “at least one” means one or more, and “a plurality of” means two or more. The term “and / or” describes an association between associated objects and represents that three associations can exist. For example, “A and / or B” can indicate that only A exists, only B exists, and both A and B exist, where A and B can be singular or plural. The character “7” in this descriptive memory generally indicates an “or” relationship between the associated objects. “At least one of the following items” or a similar expression means any combination of these items, including a single item or any combination of a plurality of items. For example, “at least one of a, b, c” can represent a, b, c, “ayb”, “ayc”, “byc”, or “a, b, yc”, where a, b, and c can be singular or plural. For a terminal device that supports simultaneous dual-standard 4G and 5G transmission and reception, the device may be provided with separate 4G and 5G radio frequency front-end channels to ensure that radio frequency devices on both channels can operate concurrently. The 4G radio frequency front-end channel includes multiple front-end devices, such as a multiplexer or filter. The 5G radio frequency front-end channel also includes multiple front-end devices, such as a multiplexer or filter. The 4G and 5G radio frequency front-end channels are independent of each other to support the transmission of 4G radio signals from different frequency bands and 5G radio signals from different frequency bands.Unlike a front-end device provided with a 4G radio frequency front-end channel and a front-end device provided with a 5G radio frequency front-end channel, a radio frequency front-end module in the forms of this application is provided with a frequency band selection circuit. The frequency band selection circuit can route a first radio frequency signal and a second radio frequency signal, both of the same frequency band, to the same filter and / or multiplexer, so that a first radio frequency front-end channel and a second radio frequency front-end channel can share the filter and / or multiplexer, thereby reducing the number of devices, such as a filter and a duplexer, in a radio frequency front-end, and thus reducing the space occupied by the radio frequency front-end module.The multiplexer may include a duplexer, a triplexer, a quadriplexer, or similar components. For a specific RF front-end module structure in the modalities of this application, refer to the modal descriptions below. The first and second radio frequency signals in the modalities of this application may be radio frequency signals of different standards. For example, the first radio frequency signal is a 4G radio frequency signal, and the second radio frequency signal is a 5G radio frequency signal. Alternatively, the first and second radio frequency signals may be radio frequency signals of the same standard but from different frequency bands; or the first and second radio frequency signals may be radio frequency signals by which the terminal device communicates with an access network device through different SIM cards. frfrfrenn / eznz / E / YiAi A 5G radio frequency signal frequency band in the modalities of this application may be Sub6G, that is, a frequency band below 7.2 GHz. A 4G radio frequency signal frequency band in the modalities of this application may be Sub3G, that is, a frequency band below 3 GHz. Therefore, the 5G radio frequency signal frequency band and the 4G radio frequency signal frequency band have an overlapping frequency band, namely the frequency band below 3 GHz. The frequency band below 3 GHz may include a low frequency band (LB), a middle frequency band (MB), and a high frequency band (HB). The LB is a frequency band below 1000 MHz; the MB is a frequency band from 1.7 GHz to 2.3 GHz; and HB is a frequency band from 2.3 GHz to 2.7 GHz.The LB and the MB can constitute an LMB; and the MB and the HB can constitute an MHB. For ease of description, a frequency band from 2.7 GHz to 7.2 GHz is referred to as the 5G high-frequency band in the modalities of this application. A 5G frequency range is divided into different frequency bands. These different frequency bands correspond to different frequency band numbers, for example, N41 and N7. A 4G frequency range is also divided into different frequency bands. These different frequency bands correspond to different frequency band numbers, for example, B41 and B7. N41 and B41 belong to the same frequency range. LB may include N28A, B28A, N28B, B28B, N20, B20, N8, B8, and similar. MB may include N1, B1, N3, B3, and similar. HB may include N41, B41, N40, B40, N7, B7, and similar. In one example, the radio frequency front-end module in the modalities of this application can be applied to a terminal device 3 in a communications system shown in FIGURE 1. The communications system can be a communications system that uses dual connectivity implemented in an NSA mode, for example, dual LTE-NR connectivity. The dual LTE-NR connectivity can include EN-DC (E-UTRA-NR Dual Connectivity), NGEN-DC (NG-RAN E-UTRA-NR Dual Connectivity), or NE-DC (NR-E-UTRA Dual Connectivity). EN-DC means that a 4G core network (Evolved Packet Core, EPC) is deployed in an access network, where a 4G base station is used as a master base station (Master eNB, MeNB), and a 5G base station is used as a secondary base station (Secondary eNB, SeNB). NGEN-DC means that a 5G core network (5G Core, 5GC) is deployed in an access network, where a 4G base station is used as a secondary base station (Secondary eNB, SeNB). MeNB, and a 5G base station is used as a SeNB). NE-DC means that a 5G is deployed in an access network, where a 5G base station is used as a MeNB, and a 4G base station is used as a SeNB. It should be noted that, with the development of communication technologies, the aforementioned dual connectivity implemented in NSA mode can alternatively take another form, for example, dual connectivity of NR and a next-generation communication technology (e.g., 6G), and dual connectivity of 4G and a next-generation communication technology (e.g., 6G). The modalities of this application are not limited to dual LTE-NR connectivity. In other words, the radio frequency front-end module in the modalities of this application can be applied to a terminal device that simultaneously communicates with access network devices of different standards. Certainly, it can be understood that the radio frequency front end module in the modalities of this application can be applied alternatively to a terminal device that communicates simultaneously with different access network devices of the same standard. As shown in Figure 1, the communications system may include a terminal device 3, an access network device 1, and an access network device 2. The terminal device 3 in Figure 1 is a terminal device with dual connectivity capability, configured primarily to connect, via an over-the-air interface, to at least one access network device deployed by an operator, in order to receive network service. It is readily understood that a terminal device with dual connectivity capability typically requires two radio frequency transceiver channels that support communication with two access network devices of the same or different standards.The access network device is primarily configured to implement a wireless protocol stack function, a resource scheduling and radio resource management function, a radio access control function, a mobility management function, and the like. For example, non-standalone 5G NR is commonly used in an early stage of deploying a 5th generation (5G) system, for example, an EN-DC communications system based on approximately an Option 3x or Option 3 architecture. For example, in the EN-DC communications system, access network device 1 might be an evolved Node B (eNB) in a long-term evolution (LTE) system; access network device 2 might be a gNode B (gNB) in an NR system; and the terminal device might simultaneously communicate with the eNB and the gNB. The access network device referred to above may be an access network device that has a wireless transceiver function or a chip disposed within an access network device. The access network device includes, but is not limited to, an evolved Node B (eNB), a radio network controller (RNC), a Node B (NB), a base station controller (BSC), a base transceiver station (BTS), a home base station (e.g., a home evolved Node B, or a home Node B, HNB), a baseband unit (BBU), an access point (AP) in a wireless fidelity (Wi-Fi) system, a wireless relay node, a path node, a transmission and reception point (TRP), or a transmission point (TP), or similar devices.The network access device can alternatively be a gNB or a transmit point (TRP or TP) in a 5G system, for example, an NR system, a panel antenna, or a group of antenna panels (including a plurality of antenna panels) of a base station in a 5G system. Furthermore, the access network device can alternatively be a network node that constitutes a gNB or a transmit point, for example, a baseband unit (BBU) or a distributed unit (DU). The aforementioned terminal device may also be referred to as a user equipment (UE), an access terminal, a user unit, a user station, a mobile station, a remote console, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user proxy, or a user appliance.The terminal in the modalities of this application may be a mobile phone, a tablet computer, a computer with a wireless transceiver function, a virtual reality (VR) terminal, an augmented reality (AR) terminal, a wireless terminal in industrial control, a wireless terminal in self-driving vehicles, a wireless terminal in telemedicine, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, a smartwatch, a smart band, smart glasses, other sports accessories, or wearable or similar devices. An application scenario is not limited in the modalities of this application. It should be noted that Figure 1 is merely an example architecture diagram. In addition to the functional units shown in Figure 1, the communications system may also include another functional unit. This is not limited to the modalities of this application. In another example, the radio frequency front-end module in the modalities of this application may alternatively be applied to a terminal device that communicates with different cells on the same access network device; that is, a terminal device that communicates with an access network device using a carrier aggregation (CA) technology. For example, CA may be LTE CA, 5G CA, or CA of another standard; it is not limited in the modalities of this application. For yet another example, the radio frequency front-end module in the modalities of this application can be alternatively applied to a multi-SIM terminal device, for example, a dual SIM dual standby (DSDS) terminal device or a dual SIM dual active (DSDA) terminal device. A DSDS terminal device is used as an example below. The DSDS terminal device can be supplied with two subscriber identification module (SIM) cards; both SIM cards are in standby mode. A user can use the two SIM cards to perform operations such as making a call, answering a call, receiving or sending a text message, and accessing various applications (such as a video player application, an instant messaging application, and a game application).Alternatively, either SIM card can be replaced with an embedded SIM (eSIM). For example, a user can use one SIM card to communicate with an eNB on an LTE system and the other SIM card to communicate with a gNB on an NR system. It should be noted that, for a DSDS terminal device, the user uses one SIM card to access a game application. During the process of accessing the game application, the terminal device receives a voice service request from the other SIM card. In this case, the game application on the terminal device disconnects from the server. Unlike the DSDS terminal device, for a DSDA terminal device, in the scenario described above, the game application on the terminal device does not disconnect from a server. The user can use two SIM cards to play a game while simultaneously using a voice service. The components of the aforementioned terminal device are described below with reference to FIGURE 2. frfrfrenn / cznz / E / YiAi For example, FIG. 2 is a schematic structural diagram of a terminal device 200 according to one embodiment of this application. As shown in FIG. 2, the terminal device 200 may include a processor 210, a radio frequency front end module (RFFEM) 220, a radio frequency front end power supply module 230, and an antenna module 240. The 210 processor can include one or more processing units. For example, the 210 processor can include an application processor (AP), a modem processor, a graphics processing unit (GPU), an image signal processor (ISP), a controller, a video codec, a digital signal processor (DSP), a baseband transceiver, a radio frequency transceiver, and / or a neural network processing unit (NPU). The controller can generate an operation control signal based on an instruction opcode and a timing sequence signal to complete instruction fetch and execution control. The 210 processor can be equipped with memory configured to store an instruction and data. In some configurations, the memory in the 210 processor is a cache. This memory can store an instruction or data that has just been used or is used cyclically by the 210 processor. If the 210 processor needs to use the instruction or data again, it can directly retrieve it from memory. This avoids repeated access and reduces the 210 processor's wait time, thereby improving system efficiency. The baseband is configured to synthesize a baseband signal for transmission and / or decode a received baseband signal. Specifically, the baseband encodes voice or other data signals into a baseband signal (baseband code) for transmission during transmission, and decodes a received baseband signal (baseband code) back into voice or other data signals during reception. The baseband may include components such as an encoder, a decoder, and a baseband processor. The encoder is configured to synthesize a baseband signal for transmission. The decoder is configured to decode a received baseband signal. The baseband processor may be a microprocessor unit (MCU). The processor may be configured to control both the encoder and the decoder.For example, the baseband processor may be configured to implement scheduling between encoding and decoding, communication between the encoder and decoder, and control a peripheral device (which may be sending an enable signal to a non-baseband component, in order to enable the non-baseband component). The modem processor may include a modulator and a demodulator. The modulator is configured to modulate a baseband signal to be transmitted into a baseband modulation signal. The demodulator is configured to demodulate a received baseband modulation signal into a baseband signal. The demodulator then transmits the resulting baseband signal back to the baseband for processing. After the baseband signal is processed, the resulting signal is transmitted to an application processor. The application processor outputs a sound signal through an audio device (which is not limited to a loudspeaker, telephone receiver, and the like) or displays an image or video through a display screen. In some modes, the modem processor may be a separate device.In some other configurations, the modem processor may be independent of the 210 processor and be arranged in the same device as the 220 radio frequency front end module or another functional module. The radio frequency transceiver is configured to perform overconversion on a baseband modulation signal output by the modem processor to obtain a radio frequency (RF) signal; and to transmit this RF signal to the RF front end module 220, so that the RF signal can be transmitted by one or more antennas on antenna module 240. The radio frequency transmitter is further configured to perform underconversion on an RF signal received through antenna module 240 and the RF front end module 220 to obtain a baseband modulation signal, so that the baseband modulation signal can be processed by the modem processor and the baseband amplifier. In some configurations, the radio frequency transceiver may be a separate device.In some other modalities, the radio frequency transceiver may be independent of the processor 210, and may be arranged in the same device as the radio frequency front end module 220 or another functional module. The 210 processor can perform frequency modulation on a signal according to a mobile communication technology or a wireless communication technology.Mobile communication technology may include a global system for mobile communications (GSM), a general packet radio service (GPRS), code division multiple access (CDMA), wideband code division multiple access (WCDMA), time-division code division multiple access (TD-SCDMA), long term evolution (LTE), an emerging wireless communication technology (also referred to as a 5th generation mobile communication technology, in English: 5th generation mobile networks, 5th generation wireless systems, 5th-Generation, or 5th-Generation New Radio, 5G, frfrfrenn / eznz / E / YiAi. 5G technology (or 5G NR for short), and the like. Wireless communication technology may include a wireless local area network (WLAN) (e.g., a wireless fidelity network, Wi-Fi), Bluetooth (BT), a global navigation satellite system (GNSS), frequency modulation (FM), near field communication (NFC) technology, infrared (IR) technology, and the like. In the 210 processor, different processing units can be standalone devices or can be integrated into one or more integrated circuits. The RF front end module 220 is configured to receive and transmit an RF signal through the antenna module 240. For example, the RF front end module 220 can perform processing on the RF signal, such as amplification, filtering, and / or transmission. The antenna module 240 is configured to transmit and receive a radio frequency signal in the form of electromagnetic waves. The antenna module 240 may include a plurality of antennas or a plurality of antenna groups (a plurality of antenna groups includes more than two antennas). Each antenna or the plurality of antenna groups may be configured to cover a single communication frequency band or a plurality of communication frequency bands. The plurality of antennas may consist of one or more multi-frequency antennas, antenna arrays, or on-chip antennas. The processor 210 is coupled with the antenna module 240 to implement various functions associated with transmitting and receiving a radio frequency signal. For example, when the terminal device 200 transmits a signal, the baseband data (a digital signal) is synthesized into a baseband signal for transmission. The baseband signal is modulated by the modem processor into a baseband modulation signal. The baseband modulation signal is then converted by the radio frequency transceiver into a transmission signal (radio frequency signal). The transmission signal is processed by the radio frequency front-end module 220. The resulting signal is then transmitted to the antenna module 240 and subsequently transmitted out.The path through which the transmit signal is sent from processor 210 to antenna module 240 is a transmit link (or transmission path). When terminal device 200 requires a signal, antenna module 240 sends a receive signal (radio frequency signal) to the radio frequency front end module 220. After processing the radio frequency signal, the radio frequency front end module sends a processed radio frequency signal to the radio frequency transceiver. frfrfrenn / eznz / E / YiAi The radio frequency transceiver processes the radio frequency signal into a baseband modulation signal and transmits the baseband modulation signal to the modem processor. The modem processor converts the baseband modulation signal back into a baseband signal and transmits the baseband signal to the baseband. After converting the baseband signal into data, the baseband sends the data to the appropriate application processor. The path through which data is sent from antenna module 240 to processor 210 is a transmit link (or referred to as a receive path). The RF front-end power supply module 230 is configured to receive a battery input and / or charge the management module, and supply power to the RF front-end module 220, for example, to power a power amplifier in the RF front-end module 220. In some modes, the RF front-end power supply module 230 may also be arranged in the processor 210. The 210 processor can further provide a CON control signal to the 230 radio frequency front end power supply module, and provide a first TX1 radio frequency signal and a second TX2 radio frequency signal to the 220 radio frequency front end module. The RF 230 front end power supply module may also include a first power supply end Vpa11 and a second power supply end Vpa12. The first power supply end Vpa11 of the RF 230 front end power supply module is coupled to a first power supply end Vpa11 of the RF 220 front end module. The second power supply end Vpa12 of the RF 230 front end power supply module is coupled to a second power supply end Vpa12 of the RF 220 front end module. Optionally, in some configurations, the RF 230 front end power supply module may also include a third power supply end Vpa13.The third end of the Vpa13 power supply of the RF 230 front-end power supply module is coupled to a third end of the Vpa13 power supply of the RF 220 front-end module. The number of power supply ends included by the RF 230 front-end power supply module corresponds to the number of power amplifiers included by the RF 220 front-end module and can be reasonably specified as required. For example, two amplifiers included by the RF 220 front-end module have different power supply voltages. The RF 230 front-end power supply module can include two power supply ends, thereby supplying power to the two power amplifiers, respectively.The radio frequency front end module 220 may further include a first end of the radio frequency signal RF21, a second end of the radio frequency signal RF22, ..., and an N end of the radio frequency signal RF2N. N is any positive integer. The first end of the RF21 radio frequency signal from the RF20 front end module is coupled to a first end of the RF21 radio frequency signal from the antenna module 240. The second end of the RF22 radio frequency signal from the RF20 front end module is coupled to a second end of the RF22 radio frequency signal from the antenna module 240. The Nth end of the RF2N radio frequency signal from the RF20 front end module is coupled to an Nth end of the RF2N radio frequency signal from the antenna module 240. A value of N may be related to a number of antennas included by the antenna module 240.For example, N=4, 6, or another positive integer. Processor 210 provides a power supply control signal to the RF front-end power supply module 230. This control signal acts on the RF front-end power supply module 230, enabling it to supply power to the RF front-end module 220. Processor 210 then sends a first RF signal, TX1, to the RF front-end module 220. Processor 210 then sends a second RF signal, TX2, to the same RF front-end module.The front-end radio frequency module 220 is configured to perform processing on the first radio frequency signal and the second radio frequency signal, such as amplification, filtering and / or transmission, and to output either one or both of the first end of the radio frequency signal RF21, the second end of the radio frequency signal RF22... or the N end of the radio frequency signal RF2N to the antenna module 240. The antenna module 240 is configured to transmit the first radio frequency signal and the second radio frequency signal in the form of electromagnetic waves. In one example, the first and second radio frequency signals in this application form could be radio frequency signals through which terminal device 200 simultaneously communicates with access network devices of different standards. For example, the first radio frequency signal could be a radio frequency signal through which terminal device frfrfrenn / eznz / E / YiAi 200 communicates with a 4G base station; and the second radio frequency signal can be a radio frequency signal by which terminal device 200 communicates with a 5G base station. In another example, the first radio frequency signal and the second radio frequency signal in this modality of this application can alternatively be radio frequency signals from different carriers on the same access network device. In yet another example, the first radio frequency signal and the second radio frequency signal in this modality of this application may alternatively be radio frequency signals by which the terminal device 200 communicates with an access network device through different SIM cards. The RF front-end module 220 in this modality of this application adopts a simplified RF link and supports the transmission of the first and second RF signals in any of the above examples, in order to reasonably utilize the limited design space of the RF device of terminal device 200 and ensure the performance of terminal device 200 in different application scenarios. For a specific structure and RF signal processing method of the RF front-end module 220, please refer to the description of the following modalities. It can be understood that the structure illustrated in this embodiment does not constitute a specific limitation on the terminal device 200. In some other embodiments of this application, the terminal device 200 may include more or fewer components than those shown in the figure, or some components may be combined or divided, or there may be different arrangements of the components. The components shown in the figure may be implemented using hardware, software, or a combination of both. For example, the following example uses a mobile phone as the terminal device 200 to illustrate a specific structure of the terminal device 200. Figure 3 shows a schematic structural diagram of a terminal device 200 (e.g., a mobile phone). This configuration is illustrated using an example where the antenna module 240 of the terminal device 200 includes antenna 1 and antenna 2. The terminal device 200 may include a processor 110, an external memory interface 120, internal memory 121, a universal serial bus (USB) interface 130, a charging management module 140, a power management module 141, a battery 142, antenna 1, antenna 2, a mobile communication module 150, a wireless communication module 160, an audio module 170, a speaker 170A, a telephone receiver 170B, a microphone 170C, a headphone jack 170D, a sensor 180, and a button frfrfrenn / eznz / E / YiAi 190, a motor 191, an indicator 192, a camera 193, a display screen 194, a subscriber identification module (SIM) card interface 195, and the like. It may be understood that the structure illustrated in this embodiment does not constitute a specific limitation on the terminal device 200. In some other embodiments of this application, the terminal device 200 may include more or fewer components than those shown in the figure, or some components may be combined or divided, or there may be different arrangements of the components. The components shown in the figure may be implemented by hardware, software, or a combination thereof. For a description of the 110 processor, please refer to the description of the 210 processor in the configuration shown in FIGURE 2. The details are not described again in this document. In some configurations, the 110 processor may include one or more interfaces. These interfaces may include an Inter-Integrated Circuit (I2C) interface, an Inter-Integrated Circuit Sound (I2S) interface, a Pulse Code Modulation (PCM) interface, a Universal Asynchronous Receiver / Transmitter (UART) interface, a Mobile Industry Processor Interface (MIPI) interface, a General-Purpose Input / Output (GPIO) interface, a Subscriber Identity Module (SIM) interface, a Universal Serial Bus (USB) interface, and / or similar interfaces. The USB 130 interface is a USB-compliant interface and may specifically be a Mini USB interface, a Micro USB interface, a USB Type-C interface, or similar interfaces.The USB 130 interface can be configured to connect a charger to charge the terminal device 200, configured to transmit data between the terminal device 200 and a peripheral device, or configured to connect headphones to play audio through the headphones. It can be understood that an interface connection relationship between modules, illustrated in this modality of this application, is merely an example description and does not constitute a limitation on the structure of the terminal device 200. In some other modalities of this application, the terminal device 200 may alternatively use a different interface connection method than that in the preceding modality, or a combination of a plurality of interface connection methods. The charging management module 140 is configured to receive a charging input from the charger. The charger can be either a wireless or a wired charger. In some wired charging modes, the charging management module 140 can receive a charging input from the wired charger via the USB interface 130. In some wireless charging modes, the charging management module 140 can receive a wireless charging input by using a wireless charging coil from the terminal device 200. When the charging management module 140 is charging the battery 142, additional power can be supplied to the terminal device 200 using the power management module 141. The power management module 141 is configured to connect the battery 142, the charging management module 140, and the processor 110. The power management module 141 receives an input from the battery 142 and / or the charging management module 140 and supplies power to the processor 110, the internal memory 121, the display screen 194, the camera 193, the wireless communication module 160, and similar components. The power management module 141 can also be configured to monitor parameters such as battery capacity, battery cycle count, and battery health (leakage and impedance). In other configurations, the power management module 141 can be arranged on the processor 110. In some configurations, the power management module 141 and the charging management module 140 can be arranged on the same component. The preceding RF front end module 230 may be a submodule that is in the power management module 141 and is configured to supply power to the RF front end module. A wireless communication function of terminal device 200 can be implemented using antenna 1, antenna 2, mobile communication module 150, wireless communication module 160, a modem processor, a baseband processor, and similar components. Antenna 1 and antenna 2 are configured to transmit and receive electromagnetic wave signals. Each antenna on terminal device 200 can be configured to cover a single communication frequency band or multiple communication frequency bands. Alternatively, different antennas can be multiplexed to improve antenna utilization. For example, antenna 1 can be multiplexed as a diversity antenna for a wireless local area network. The mobile communications module 150 can provide solutions for wireless communications such as 2G, 3G, 4G, and 5G, applicable to terminal device 200. The mobile communications module 150 may include at least one filter, one switch, one power amplifier, one low-noise amplifier (LNA), and similar components. The mobile communications module 150 may be the radio frequency front-end module 220 shown in Figure 2. The mobile communications module 150 can receive an electromagnetic wave through antenna 1 and process the received electromagnetic wave, such as filtering or amplification. The mobile communications module 150 can also amplify an RF signal and convert the amplified signal into an electromagnetic wave for radiation using antenna 1.In some configurations, at least some functional modules of the mobile communications module 150 may be arranged in the processor 110. In some configurations, at least some functional modules of the mobile communications module 150 may be arranged in the same device as at least some of the modules of the processor 110. The Wireless Communications Module 160 can provide solutions for wireless communications such as WLAN, Bluetooth, GNSS, FM, NFC, and IR for the Terminal Device 200. The Wireless Communications Module 160 can be one or more devices integrating at least one communications processor module. The Wireless Communications Module 160 receives an electromagnetic wave using antenna 2, performs frequency modulation and filtering on an electromagnetic wave signal, and sends the processed signal to processor 110. The Wireless Communications Module 160 can also receive a signal to be sent from processor 110, perform frequency modulation and amplification on the signal, and convert the modulated and amplified signal into an electromagnetic wave for radiation using antenna 2. In some embodiments, antenna 1 of terminal device 200 is coupled to the mobile communications module 150, and antenna 2 is coupled to the wireless communications module 160, so that terminal device 200 can communicate with a network and with another device through a mobile communication technology or wireless communication technology. The terminal device 200 can implement a display function using a GPU, the display screen 194, an application processor, and similar components. The GPU is a microprocessor for image processing and is connected to the display screen 194 and the application processor. The GPU is configured to perform mathematical and geometric calculations and is used for graphics rendering. The processor 110 can include one or more GPUs that execute instructions to generate or change display information. Display screen 194 is configured to display an image, video, or the like. Display screen 194 includes a display panel. The display panel may use a liquid crystal display (LCD), an organic light-emitting diode (OLED), an active-matrix organic light-emitting diode (AMOLED), a flexible light-emitting diode (FLED), a mini-LED, a micro-LED, a micro-OLED, a quantum dot light-emitting diode (QLED), or the like. In some embodiments, terminal device 200 may include one or N display screens 194, where N is a positive integer greater than 1. The terminal device 200 can implement a repair function using an ISP, one or more cameras 193, a video codec, the GPU, one or more display screens 194, the application processor, and the like. The external memory interface 120 can be configured to connect an external storage card, such as a microSD card, thereby expanding the storage capacity of the terminal device 200. The external storage card communicates with the processor 110 via the external memory interface 120 to perform data storage functions. For example, data files such as music, photographs, and videos are stored on the external storage card. Internal memory 121 can be configured to store one or more computer programs, and these programs include instructions. The processor 110 can execute various functional applications, data processing, and similar operations by executing the preceding instructions stored in internal memory 121. Internal memory 121 can include a program storage area and a data storage area. The program storage area can store an operating system. The program storage area can also store one or more applications (for example, "Gallery" and "Contacts") and similar items. The data storage area can store data (for example, photos and contacts) and similar items created during the use of terminal device 200.In addition, the internal memory 121 may include high-speed random access memory and may also include non-volatile memory, for example, at least one magnetic disk storage device, a flash memory device, or universal flash storage (UFS). The terminal device 200 can use the audio module 170, speaker 170A, telephone handset 170B, microphone 170C, headphone jack 170D, application processor, and similar components to implement an audio function, such as music playback and sound recording. The audio module 170 is configured to convert digital audio information into an analog audio signal and to convert an analog audio input into a digital audio signal. The audio module 170 can also be configured to encode and decode audio signals. In some configurations, the audio module 170 may be arranged in the processor 110, or some functional modules of the audio module 170 may be arranged in the processor 110. The speaker 170A, also referred to as the "horn," is configured to convert an electrical audio signal into a sound signal.The terminal device 200 can play music or answer a hands-free call through the speakerphone 170A. The telephone receiver 170B, also referred to as the "telephone," is configured to convert an electrical audio signal into a sound signal. A user of the terminal device 200 can answer a call or listen to a voice message by placing the handset of the telephone 170B against their ear. The microphone 170C, also referred to as the "acoustic tube" or "microphone," is configured to convert a sound signal into an electrical signal. When making a call or sending a voice message, the user can make a sound with the microphone 170C near their mouth to input a sound signal into the microphone 170C. The terminal device 200 may be provided with at least one microphone 170C.In some other configurations, the 200 terminal device may be provided with two 170C microphones that can perform noise reduction in addition to collecting sound signals. Alternatively, the 200 terminal device may be provided with three, four, or more 170C microphones for sound signal collection, noise reduction, sound source identification, directional recording, and similar functions. The 170D headset connector is configured for connecting a wired headset. The 170D headset connector may be a USB 130 interface, a standard 3.5 mm open mobile terminal platform (OMTP) interface, or a standard CTIA interface. The 180 sensor may include a pressure sensor 180A, a gyroscopic sensor 180B, a barometric pressure sensor 180C, a magnetic sensor 180D, an acceleration sensor 180E, a distance sensor 180F, an optical proximity sensor 180G, a fingerprint sensor 180H, a temperature sensor 180J, a touch sensor 180K, an ambient light sensor 180L, a bone conduction sensor 180M, and the like. Key 190 includes a home key, a volume key, and similar functions. Key 190 can be a mechanical key or a tactile key. Terminal device 200 can receive key input and generate key signal input related to user settings and functional control of terminal device 200. The SIM card interface 195 is configured to connect a SIM card. The SIM card can be inserted into or removed from the SIM card interface 195, thereby connecting to or disconnecting from the terminal device 200. The terminal device 200 can support one or N SIM card interfaces, where N is a positive integer greater than 1. The SIM card interface 195 can support a nano SIM card, a micro SIM card, a single SIM card, or similar cards. Multiple SIM cards can be inserted into the same SIM card interface 195 simultaneously. These multiple cards can be the same or different types. The SIM card interface 195 can also support different types of SIM cards. The SIM card interface 195 can also support an external storage card.The terminal device 200 interacts with a network via a SIM card, enabling functions such as making / answering calls and data communication. In some models, the terminal device 200 uses an eSIM, i.e., an embedded SIM card. The SIM card may be integrated into the terminal device 200 and cannot be removed. The radiofrequency front-end module in this modality of this application is described below with reference to many specific modalities. Figure 4 is a schematic structural diagram of another terminal device according to one embodiment of this application. As shown in Figure 4, the terminal device may include a processor 210, a radio frequency front-end module 220, a radio frequency front-end power supply module 230, and an antenna module 240. The radio frequency front-end module 220 may include a power amplification circuit 10, a frequency band selection circuit 20, and a front-end circuit 50. The front-end circuit 50 may include a first front-end circuit 51. The power amplifier circuit 10 is configured to perform power amplification on a first radio frequency signal and a second radio frequency signal produced by the processor 210, and then output an amplified radio frequency signal to the frequency band selection circuit 20. In some embodiments, the power amplifier circuit 10 may include a first power amplifier 11 and a second power amplifier 12. The first power amplifier 11 is configured to perform power amplification on the first radio frequency signal and output a first amplified radio frequency signal to the frequency band selection circuit 20. The second power amplifier 12 is configured to perform power amplification on the second radio frequency signal and output a second amplified radio frequency signal to the frequency band selection circuit 20. The frequency band selection circuit 20 is configured to: route the first amplified RF signal to the first front-end circuit 51 when the first RF signal converges with a first frequency band, and route the second amplified RF signal to the first front-end circuit 51 when the second RF signal converges with a second frequency band, where the first front-end circuit 51 supports the first frequency band and the second frequency band. The first front-end circuit 51 is configured to perform filtering and / or combining at least one of the first amplified RF signal or the second amplified RF signal to obtain a first transmit signal. The antenna module 240 is configured to transmit the first transmit signal. The first frequency band and the second frequency band belong to a first frequency interval. The first frequency interval includes a frequency interval of an HB, a frequency interval of an MB, or a frequency interval of an LB. For example, the first frequency interval is the HB frequency interval; the first frequency band may include one or more 5G high-frequency bands such as N41, N7, or N40; and the second frequency band may include one or more 4G high-frequency bands, such as B41, B7, or B40. For another example, the first frequency interval is the HB frequency interval; the first frequency band may include one or more 5G high-frequency bands such as N41, N7, or N40; and the second frequency band may include one or more 5G high-frequency bands, such as N41, N7, or N40.For yet another example, the first frequency range is the HB frequency range; the first frequency band may include one or more 4G high frequency bands such as B41, B7 or B40; and the second frequency band may include one or more 4G high frequency bands, such as B41, B7 or B40. In some modes, the frequency band selection circuit 20 may include signal ends of the first n subfrequency bands, the signal ends of the first n subfrequency bands are coupled separately to the first front-end circuit 51, and n is a positive integer.The frequency band selection circuit 20 is configured to: when the first radio frequency signal converges with the first frequency band and a first sub-frequency band of the first n sub-frequency bands, emit the first amplified radio frequency signal to the first front end of circuit 51 through one end of the signal of the first sub-frequency band; and when the second radio frequency signal converges with the second frequency band and a first sub-frequency band of the first n sub-frequency bands, emit the second amplified radio frequency signal to the first circuit of the front end 51 through the end of the signal of the first sub-frequency band, where the first n sub-frequency bands belong to the first frequency interval.For example, in a case where the first frequency interval is a frequency interval of the HB, yn=3, the first three sub-frequency bands may include a frequency interval of a first sub-frequency band corresponding to B41 and N41; a frequency interval of a first sub-frequency band corresponding to B7 and N7; and a frequency interval of a first sub-frequency band corresponding to B40 and N40. Consequently, one end of the signal of a first sub-frequency band of the frequency band selection circuit 20 is configured to emit a first radio frequency signal and / or a second radio frequency signal whose frequency belongs to the first sub-frequency band. For example, the first radio frequency signal is an N41 radio frequency signal, the second radio frequency signal is a B41 radio frequency signal, the first radio frequency signal merges with a frequency range of a first sub-frequency band corresponding to B41 and N41, the frequency band selection circuit 20 emits the first amplified radio frequency signal to the first front-end circuit 51 through one end of the signal of the first sub-frequency band corresponding to B41 and N41, the second radio frequency signal merges with the frequency range of the first sub-frequency band corresponding to B41 and N41, and the frequency band selection circuit 20 emits the second amplified radio frequency signal to the first front-end circuit 51 through the end of the signal of the first sub-frequency band corresponding to B41 and N41. Optionally, the front-end circuit 50 may also include a second front-end circuit 52. The frequency band selection circuit 20 is further configured to: route the first amplified RF signal to the second front-end circuit 52 when the first RF signal converges with a third frequency band, and route the second amplified RF signal to the second front-end circuit 52 when the second RF signal converges with a fourth frequency band, where the second front-end circuit 52 supports both the third and fourth frequency bands. The second front-end circuit 52 is configured to perform filtering and / or combining at least one of the first amplified RF signal or the second amplified RF signal to obtain a second transmit signal.The antenna module 240 is also configured to transmit the second transmission signal. The third and fourth frequency bands belong to a second frequency interval. Each of the second and first frequency intervals includes any two frequencies from the HB, MB, or LB frequency intervals. For example, the first frequency interval is the HB frequency interval; the second frequency interval is the MB frequency interval; the third frequency band may include one or more 5G intermediate frequency bands such as N1 or N3; and the fourth frequency band may include one or more 4G intermediate frequency bands such as B1 or B3.For another example, the first frequency band is the HB frequency band; the second frequency band is the MB frequency band; the third frequency band may include one or more 5G intermediate frequency bands such as N1 or N3; and the fourth frequency band may include one or more 5G intermediate frequency bands such as N1 or N3. For yet another example, the first frequency band is the HB frequency band; the second frequency band is the MB frequency band; the third frequency band may include one or more 4G intermediate frequency bands such as B1 or B3; and the fourth frequency band may include one or more 4G intermediate frequency bands such as B1 or B3. In some modes, the frequency band selection circuit 20 may also include signal ends of m second subfrequency bands, the signal ends of the m first subfrequency bands are coupled separately with the second front-end circuit 52, ym is a positive integer.The frequency band selection circuit 20 is configured to: when the first radio frequency signal converges with the third frequency band and a second sub-frequency band of the m second sub-frequency bands, emit the first amplified radio frequency signal to the second front end of circuit 52 through one end of the signal of the second sub-frequency band; and when the second radio frequency signal converges with the fourth frequency band and a second sub-frequency band of the m second sub-frequency bands, emit the second amplified radio frequency signal to the second circuit of the front end 52 through the end of the signal of the second sub-frequency band, where the m second sub-frequency bands belong to the second frequency interval.For example, in a case where the second frequency range is the MB frequency range, ym=2, the first two sub-frequency bands may include a frequency range of a second sub-frequency band corresponding to B1 and N1; and a frequency range of a second sub-frequency band corresponding to B3 and N3. Consequently, one end of the signal of a second sub-frequency band of the frequency band selection circuit 20 is configured to emit a first radio frequency signal and / or a second radio frequency signal whose frequency belongs to the second sub-frequency band. For example, the first radio frequency signal is an N1 radio frequency signal, the second radio frequency signal is a B1 radio frequency signal, the first radio frequency signal merges with a frequency range of a second sub-frequency band corresponding to B1 and N1, the frequency band selection circuit 20 frfrfrenn / eznz / E / YiAi emits the first amplified radio frequency signal to the second front-end circuit 52 through one end of the signal of the second sub-frequency band corresponding to B1 and N1, the second radio frequency signal merges with the frequency range of the first sub-frequency band corresponding to B1 and N1, and the frequency band selection circuit 20 emits the second amplified radio frequency signal to the first front-end circuit 52 through the end of the signal of the second sub-frequency band corresponding to B1 and N1. Optionally, the front-end circuit 50 may include a third front-end circuit 53. The frequency band selection circuit 20 is further configured to: route the first amplified RF signal to the third front-end circuit 53 when the first RF signal converges with a fifth frequency band, and route the second amplified RF signal to the third front-end circuit 53 when the second RF signal converges with a sixth frequency band, where the third front-end circuit 53 supports both the fifth and sixth frequency bands. The third front-end circuit 53 is configured to perform filtering and / or combining at least one of the first amplified RF signal or the second amplified RF signal to obtain a third transmit signal.The antenna module 240 is also configured to transmit the third transmission signal. The fifth and sixth frequency bands belong to a third frequency interval. Each of the third, second, and first frequency intervals is either the HB, MB, or LB frequency interval, respectively. Any two bands from the first, second, and third frequency intervals are different. For example, the first frequency interval is the HB frequency interval; the second frequency interval is the MB frequency interval; the third frequency interval is the LB frequency interval; the fifth frequency band may include one or more 5G low-frequency bands such as N28A, N28B, N20, or N8; and the sixth frequency band may include one or more 4G low-frequency bands such as B28A, B28B, B20, or B8.For another example, the first frequency band is the HB frequency band; the second frequency band is the MB frequency band; the third frequency band is the LB frequency band; the fifth frequency band may include one or more 5G low-frequency bands such as N28A, N28B, N20, or N8; and the sixth frequency band may include one or more 5G low-frequency bands such as N28A, N28B, N20, or N8. For yet another example, the first frequency band is the HB frequency band; the second frequency band is the MB frequency band; the third frequency band is the LB frequency band; the fifth frequency band may include one or more 4G low-frequency bands such as B28A, B28B, B20, or B8; and the sixth frequency band may include one or more 4G low frequency bands such as B28A, B28B, B20 or B8. In some modes, the frequency band selection circuit 20 may also include signal ends of k third sub-frequency bands, the signal ends of the k third sub-frequency bands are coupled separately with the third front-end circuit 53 and k is a positive integer.The frequency band selection circuit 20 is configured to: when the first radio frequency signal converges with the fifth frequency band and a third sub-frequency band of the k third sub-frequency bands, emit the first amplified radio frequency signal to the third front-end circuit 53 through one end of the signal of the third sub-frequency band; and when the second radio frequency signal converges with the sixth frequency band and a third sub-frequency band of the k third sub-frequency bands, emit the second amplified radio frequency signal to the third front-end circuit 53 through the end of the signal of the third sub-frequency band, where the k third sub-frequency bands belong to the third frequency interval.For example, if the third frequency band is the LB frequency band, yk=4, the four third sub-frequency bands can include a third sub-frequency band frequency band corresponding to B28A and N28A; a third sub-frequency band frequency band corresponding to B20 and N20; a third sub-frequency band frequency band corresponding to B8 and N8; and a third sub-frequency band frequency band corresponding to B28B and N28B. Consequently, one end of the third sub-frequency band signal of the frequency band selection circuit 20 is configured to emit a first radio frequency signal and / or a second radio frequency signal whose frequency belongs to the third sub-frequency band. For example, the first radio frequency signal is an N8 radio frequency signal, the second radio frequency signal is a B8 radio frequency signal, the first radio frequency signal merges with a frequency range of a first sub-frequency band corresponding to B8 and N8, the frequency band selection circuit 20 emits the first amplified radio frequency signal to the first front-end circuit 53 through one end of the signal of the third sub-frequency band corresponding to B8 and N8, the second radio frequency signal merges with the frequency range of the third sub-frequency band corresponding to B8 and N8, and the frequency band selection circuit 20 emits the second amplified radio frequency signal to the third front-end circuit 53 through the end of the signal of the third sub-frequency band corresponding to B8 and N8. In this configuration, the frequency band selection circuit can implement switching between radio frequency signals emitted from the power amplifier circuit to the antenna module, routing the radio frequency signals to an antenna of a corresponding frequency. Therefore, the radio frequency front-end module in this embodiment can implement the switching and routing of the first and second radio frequency signals independently of the processor. In some embodiments, one output end of the first power amplifier 11 may include a first output end HB1 of HB, a first output end MB1 of MB, and a first output end LB1 of LB. The first power amplifier 11 is configured to perform power amplification on the first radio frequency signal and output the amplified first radio frequency signal to the frequency band selection circuit 20 via the first output end HB1 of HB, the first output end MB1 of MB, or the first output end LB1 of LB. When the first radio frequency signal is a radio frequency signal from HB, after performing power amplification on the first radio frequency signal, the first power amplifier 11 outputs the amplified first radio frequency signal to the frequency band selection circuit 20 via the first output end HB1 of HB.When the first radio frequency signal is an MB radio frequency signal, after power amplification of the first radio frequency signal, the first power amplifier 11 outputs the amplified first radio frequency signal to the frequency band selection circuit 20 through the first output end of MB1 of MB. When the first radio frequency signal is an LB radio frequency signal, after power amplification of the first radio frequency signal, the first power amplifier 11 outputs the amplified first radio frequency signal to the frequency band selection circuit 20 through the first output end of LB1 of LB. One output end of the second power amplifier 12 includes a second output end HB2 of HB, a second output end MB2 of MB, and a second output end LB2 of LB.The second power amplifier 12 is configured to perform power amplification on the second radio frequency signal and output the amplified second radio frequency signal to the frequency band selection circuit 20 through the second output end HB2 of HB, the second output end MB2 of MB, or the second output end LB2 of LB. When the second radio frequency signal is an HB radio frequency signal, after performing power amplification on the second radio frequency signal, the second power amplifier 12 outputs the amplified second radio frequency signal to the frequency band selection circuit 20 through the second output end HB2 of HB.When the second radio frequency signal is an MB radio frequency signal, after power amplification of the second radio frequency signal, the second power amplifier 12 outputs the amplified second radio frequency signal to the frequency band selection circuit 20 through the second output terminal MB2 of MB. When the second radio frequency signal is an LB radio frequency signal, after power amplification of the second radio frequency signal, the second power amplifier 12 outputs the amplified second radio frequency signal to the frequency band selection circuit 20 through the second output terminal LB2 of LB. Optionally, the 240 antenna module may include one or more first antennas and one or more second antennas. The first antenna(s) may support a high-frequency band and / or a 5G frequency band; and the second antenna(s) may support an intermediate-frequency band, a low-intermediate-frequency band, a high-intermediate-frequency band, or a low-frequency band. Specifically, these antennas may be arranged in a manner appropriate to the frequencies of the first and second radio frequency signals. Optionally, a value of n is related to the number of frequency bands of a HB supported by the terminal device; a value of m is related to the number of frequency bands of a MB supported by the terminal device; and a value of k is related to the number of frequency bands of a LB supported by the terminal device. For example, in a case where the terminal device supports N41 and N7, n is equal to 2. It should be noted that processor 210 can provide a control signal for an active device in the RF front-end module 220 in this modality of this application. For example, enabling the signals for the first power amplifier 11 and the second power amplifier 12 in the RF front-end module 220 can be provided by enabling ends PA11_EN, PA12_EN, and PA13_EN. It should also be noted that processor 210 can provide a control signal for another active device in the RF front-end module 220. Such signals are not numbered in this modality of this application. In addition, the 210 processor can also provide a control signal to the 230 radio frequency front end power supply module, so that the 230 radio frequency front end power supply module can provide a corresponding power supply voltage to the 220 radio frequency front end module. In some embodiments, the RF front-end power supply module 230 may include a power supply circuit 231 and a power supply circuit 232. The power supply circuit 231 is configured to provide a power supply voltage to the first power amplifier 11. The power supply circuit 232 is configured to provide a power supply voltage to the second power amplifier 12. For example, one power supply voltage end of the first power amplifier 11 is Vpa11, as shown in FIGURE 4; and one power supply voltage end of the second power amplifier 12 is Vpa12, as shown in FIGURE 4. In this mode, a frequency band selection circuit is provided. The frequency band selection circuit can separately route a first radio frequency signal and a second radio frequency signal to a first front-end circuit, a second front-end circuit, or a third front-end circuit. The first front-end circuit, the second front-end circuit, or the third front-end circuit can perform filtering and / or combining on the first radio frequency signal and the second radio frequency signal. A first front-end radio frequency channel configured to send the first radio frequency signal and a second front-end radio frequency channel configured to send the second radio frequency signal can share a filtering circuit.This allows for the reduction of devices such as a filter and a duplexer at a radio frequency front end, thereby reducing the space occupied by a radio frequency front end module. Furthermore, the first and second front-end radio frequency channels can share a single antenna, thus reducing the number of antennas required. Different antennas can support the transmission of radio frequency signals from different frequency bands, thereby reducing the frequency ranges that the antenna needs to support. It should be noted that, in this modality of this application, the front-end radio frequency channel is a composite channel of devices through which the first radio frequency signal is transmitted from the processor to the antenna module; and the second front-end radio frequency channel is a composite channel of devices through which the second radio frequency signal is transmitted from the processor to the antenna module. Figure 5 is a schematic structural diagram of a radio frequency 220 front end module according to one embodiment of this application. Based on this embodiment shown in Figure 4, in this embodiment, the radio frequency 220 front end module frfrfrenn / eznz / E / YiAi may further include an antenna selection circuit 60. The antenna module 240 in this configuration can include r first antennas and N-r+1 second antennas. The first r antennas can include one 241 antenna and one 24r antenna. The second N-r+1 antennas may include a 24(N-r+1)...and 24N antenna. One input end of antenna selection circuit 60 is separately coupled to one output end of the first front-end circuit 51, one output end of the second front-end circuit 52, and one output end of the third front-end circuit 53. One output end of antenna selection circuit 60 is coupled to antenna module 240. Antenna selection circuit 60 is configured to route the first transmit signal to the first r antennas, the second transmit signal to one or more of the second N-r+1 antennas, and the third transmit signal to one or more of the second N-r+1 antennas. In other words, antenna selection circuit 60 is configured to route at least one of the first, second, or third transmit signal to a corresponding antenna and transmit the signal through the antenna. The 220 radio frequency front end module may further include a first RF21 radio frequency signal end...a radio frequency signal end r RF2r, one end of the radio frequency signal (N-r+1) RF2(N-r+1), ..., and one end of the radio frequency signal N RF2N. r can be a positive integer greater than 1. The first end of the radio frequency signal RF21 of the radio frequency front end module 220 is connected to antenna 241; the end of the radio frequency signal r RF2r of the radio frequency front end module 220 is connected to antenna 24r; the end of the radio frequency signal (N-r+1) RF2(N-r+1) of the radio frequency front end module 220 is connected to antenna 24(N-r+1);...; the end of the radio frequency signal N RF2N of the radio frequency front end module 220 is connected to antenna 24N. For example, r can be 2, and N can be 4. In other words, antenna module 240 can include four antennas. Antenna module 240 can include two high-frequency antennas and two low-intermediate frequency antennas. The high-frequency antenna is configured to support the transmission of a radio frequency signal from a 5G high-frequency band or the HB band. The low-intermediate frequency antenna is configured to support the transmission of a radio frequency signal from an LMB band. The two high-frequency antennas are antennas 241 and 242. The two low-intermediate frequency antennas are antennas 243 and 244. For example, r can be 4, and N can be 7. Antenna module 240 can include four high-frequency antennas, two high-intermediate frequency antennas, and one low-frequency antenna. The high-frequency antenna is configured to support the transmission of a radio frequency signal from a 5G high-frequency band or the HB band. The high-intermediate frequency antenna is configured to support the transmission of a radio frequency signal from an MHB band. The low-frequency antenna is configured to support the transmission of a radio frequency signal from the LB band. The four high-frequency antennas are antenna 241, antenna 242, antenna 243, and antenna 244. The two high-intermediate frequency antennas are antennas 245 and antenna 246. The low-frequency antenna is antenna 247. For example, in a case where the first frequency range is the HB frequency range, the second frequency range is the MB frequency range, and the third frequency range is the LB frequency range, the antenna selection circuit 60 is configured to: route the first transmit signal output through the first front-end circuit to the high-frequency antenna, route the second transmit signal output through the second front-end circuit to the intermediate-frequency antenna, and route the third transmit signal output through the third front-end circuit to the low-frequency antenna. In some embodiments, the radio frequency front end module 220 may further include a third power amplifier 13 and a fourth front end circuit 54. One end of the power supply voltage of the third power amplifier 13 is Vpa13 shown in FIGURE 5. The third power amplifier 13 is configured to perform power amplification on the first radio frequency signal when a frequency of the first radio frequency signal belongs to a fourth frequency interval, and outputs a first amplified radio frequency signal to the frequency band selection circuit 20. The first power amplifier 11 is configured to perform power amplification on the first radio frequency signal when the frequency of the first radio frequency signal belongs to the first frequency interval, the second frequency interval or the third frequency interval, and outputs a first amplified radio frequency signal to the frequency band selection circuit 20.The frequency band selection circuit 20 is further configured to route the first amplified RF signal to the fourth front-end circuit 54 when the frequency of the first RF signal belongs to the fourth frequency range. The fourth front-end circuit 54 is configured to filter the first amplified RF signal to obtain a fourth transmit signal, or to use the first amplified RF signal as a fourth transmit signal. The antenna module 240 is further configured to transmit the fourth bbhQnn / QZnZ / B / YIAI transmit signal. The fourth frequency range can be a frequency range within the 5G high-frequency band. Optionally, the antenna selection circuit 60 is further configured to transmit the fourth transmission signal to one or more of the first antennas and to transmit the first transmission signal to one or more of the second antennas N-r+1 when the frequency of the first radio frequency signal belongs to the 5G high-frequency band and the frequency of the second radio frequency signal belongs to the HB frequency range. The first antenna supports the 5G high-frequency band or HB frequency range, and the second antenna supports the MHB frequency range. The terminal device of the radio frequency front-end module in this application mode can support the simultaneous transmission of a first radio frequency signal from any frequency band and a second radio frequency signal from any frequency band. The first and second radio frequency signals can be of different standards. The terminal device can support dual LTE-NR connectivity, for example, DC_LB_MHB, DC_LB_5G high-frequency band, DC_MB_MB, DC_HB_MB, DC_MBHB, DC_LB_MB, DC_MB_LB, DC_MB_LB, DC_MB_5G high-frequency band, DC_HB_LB, DC_LB_LB, DC_HB_LB high-frequency band, DC_HB_5G, and DC_LB_LB. When an NSA combination of DC_LB_LB is supported, a low-frequency antenna can be reduced, thus decreasing the complexity of antenna implementation. In this mode, a frequency band selection circuit is provided. The frequency band selection circuit can separately route a first radio frequency signal and a second radio frequency signal to a first front-end circuit, a second front-end circuit, or a third front-end circuit. The first front-end circuit, the second front-end circuit, or the third front-end circuit can perform filtering and / or combining on the first radio frequency signal and the second radio frequency signal. A first front-end radio frequency channel configured to send the first radio frequency signal and a second front-end radio frequency channel configured to send the second radio frequency signal can share a filtering circuit.This allows for the reduction of devices such as a filter and a duplexer at a radio frequency front end, thereby reducing the space occupied by a radio frequency front end module. Furthermore, the first and second front-end RF channels can share a single antenna, thus reducing the number of antennas required. Different antennas can support the transmission of RF signals from different frequency bands, thereby reducing the frequency ranges that the antenna needs to support. The antenna selection circuit can route transmission signals of different frequencies to the corresponding antennas for transmission. When the second power amplifier supports an NR frequency band while performing an uplink service, the radio frequency front end module in this mode can support simultaneous reception and transmission in an NR frequency band and a 5G frequency band in a dual-card scenario, thereby improving a specification in dual-card communication of a terminal device provided with the radio frequency front end module. Figure 6 is a schematic structural diagram of another radio frequency front-end module according to one modality of this application. As shown in Figure 6, based on the modality shown in Figure 5, this modality describes a specific structure of the radio frequency front-end module by using an example in which the first front-end circuit 51 supports the HB frequency range, the second front-end circuit 52 supports the MB frequency range, the third front-end circuit 53 supports the LB frequency range, and the fourth front-end circuit 54 supports the 5G high-frequency band frequency range. The signal extremes of the first n subfrequency bands are n signal extremes of HB (311.....31 n); the signal extremes of the m second subfrequency bands are m signal extremes of MB (321.....32m); and the signal extremes of the k third subfrequency bands are k signal extremes of LB (331, ..., 33k). One output end of the frequency band selection circuit 20 can include n signal ends of HB (311, ..., 31n), m signal ends of MB (321, ..., 32m), and k signal ends of LB (331, ..., 33k). Each signal end corresponds to frequency bands of the same frequency. For example, the signal end of HB 311 corresponds to N41 and B41. A value of n is related to the number of frequency bands of a HB supported by the terminal device; a value of m is related to the number of frequency bands of a MB supported by the terminal device; and a value of k is related to the number of frequency bands of a LB supported by the terminal device. For example, in a case where the terminal device supports N41 and N7, n is equal to 2. The frequency band selection circuit 20 is configured to route the first amplified radio frequency signal and the second amplified radio frequency signal frfrfrenn / eznz / E / YiAi to any one or two ports of the n signal ends of HB (311.....31n), MB signal ends (321.....32m), or ok signal ends of LB (331.....33k) for transmission. For example, when the frequency band of the first radio frequency signal is N41, the frequency band selection circuit 20 routes the amplified radio frequency signal to one signal end, corresponding to N41, of the n signal ends of HB (311, ..., 31n) for transmission; And when the frequency band of the second radio frequency signal is N3, the frequency band selection circuit 20 routes the second radio frequency signal to one end of the signal, which corresponds to N3, of the m MB signal ends (321.....32m) for broadcast. Optionally, the frequency band selection circuit 20 may include a first frequency band selection switch 21, a second frequency band selection switch 22, and a third frequency band selection switch 23. One input end of the first frequency band selection switch 21 is connected to a first output end HB1 of HB of the first power amplifier 11 and a second output end HB2 of HB of the second power amplifier 12. One output end of the first frequency band selection switch 21 is separately connected to the n signal ends of HB (311.....31 n). One input end of the second frequency band selector switch 22 is connected to a first output end MB1 of MB of the first power amplifier 11 and a second output end MB2 of MB of the second power amplifier 12. One output end of the second frequency band selector switch 22 is separately connected to the m signal ends of MB (321.....32m). One input end of the third frequency band selector switch 23 is connected to a first output end LB1 of LB of the first power amplifier 11 and a second output end LB2 of LB of the second power amplifier 12. One output end of the third frequency band selector switch 23 is separately connected to the k signal ends of LB (331.....33k). The first front-end circuit 51 may include input ends connected in the same way to the n signal ends of HB (311, ..., 31n) of the frequency band selection circuit 20. The second front-end circuit 52 may include input ends connected in the same way to the m signal ends of MB (321,..., 32m) of the frequency band selection circuit 20. The third front-end circuit 53 may include input ends connected in the same way to the k signal ends of LB frfrfrenn / eznz / E / YiAi (331.....33k) of the frequency band selection circuit 20. The first front-end circuit 51 may include an HB 31 filter circuit; the second front-end circuit 52 may include an MB 32 filter circuit; and the third front-end circuit 53 may include an LB 33 filter circuit. In some configurations, one input end of the HB 31 filter circuit is connected to the n signal ends of HB (311, ..., 31n); one input end of the MB 32 filter circuit is connected to the m signal ends of MB (321, ..., 32m). One input end of the LB 33 filter circuit is connected to ak signal ends of LB (331, ..., 33k). The HB 31 filter circuit is configured to perform filtering on the first radio frequency signal of HB and / or the second radio frequency signal of HB. The MB 32 filter circuit is configured to perform filtering on the first radio frequency signal of MB and / or the second radio frequency signal of MB. The LB 33 filtering circuit is configured to perform filtering on the first radio frequency signal of the LB and / or the second radio frequency signal of the LB. It should be noted that the HB 31 filter circuit, the MB 32 filter circuit, and the LB 33 filter circuit can respectively perform filtering in the frequency bands, or can perform filtering in a plurality of frequency bands belonging to a larger frequency band. Therefore, the number of output ends of each of the HB 31, MB 32, and LB 33 filter circuits can be less than or equal to the number of input ends of the same circuits. For example, one output end of the HB 31 filter circuit can include n' signal ends of HB (1...n'), one output end of the MB 32 filter circuit can include m' signal ends of MB (1...m'), and one output end of the LB 33 filter circuit can include m' signal ends of MB (1...m'). LB 33 can include k' signal extremes of LB (1.....k'), where 1 <n'<n, 1<m’<m, y 1 <k’<k. In some embodiments, the second circuit of the front end 52 may also include an MB 43 combining circuit. One input end of the MB 43 combining circuit is connected to the signal ends of MB (1, ..., m'). The MB 43 combining circuit is configured to combine a first radio frequency signal and / or a second radio frequency signal output filtered by the MB 32 filtering circuit, and an radio frequency signal is output to the antenna selection circuit 60. The antenna selection circuit 60 is configured to select one end of the radio frequency signal corresponding to the output to an antenna in the antenna module. In some configurations, the third front-end circuit 63 may also include an LB 46 combining circuit. One input end of the LB 46 combining circuit is connected to the k' signal ends of LB (1.....k'). The LB combining circuit is configured to combine a first radio frequency signal and / or a second radio frequency signal output filtered by the LB 33 filtering circuit, and a bbhQnn / QZnZ / B / YIAI radio frequency signal is output to the antenna selection circuit 60. The antenna selection circuit 60 is configured to select one end of the radio frequency signal corresponding to the output to an antenna in the antenna module. The fourth front-end circuit 54 may include a cable used to connect one output end of the third amplifier 13 to the output end of the antenna selection circuit 60. Certainly, it can be understood that the fourth front-end circuit 54 may also include a 5G high-frequency band filter. In some embodiments, the antenna selection circuit 60 may include an antenna selection switch 41, an antenna selection switch 42, an MHB combination circuit 44, and an antenna selection module 45. One input end of the antenna selection switch 41 is separately connected to the output end of the HB 31 filter circuit. One input end of the antenna selection switch 42 is separately connected to the output end of the third power amplifier 13 and to one output end of the antenna selection switch 41. One output end of the antenna selection switch 42 is connected to the first end of the RF21 radio frequency signal and the second end of the RF2r radio frequency signal. The input end of the MB 43 combination circuit is connected to the output end of the MB 32 filter circuit.One input end of the antenna selection switch 44 of MHB is separately connected to the output end of the combination circuit of MB 43 and one output end of the antenna selection switch 41. The input end of the combination circuit of LB 46 is connected to the output end of the filtering circuit of LB 33. One input end of the antenna selection module 45 is separately connected to one output end of the combination circuit of MHB 44, one output end of the antenna selection switch 41, and one output end of the combination circuit of LB 46. The output end of the antenna selection module 45 is separately connected to the (N-r+1) end of the RF2(N-r+1) radio frequency signal, and the N end of the RF2N radio frequency signal. The first front-end circuit, the second front-end circuit, the third front-end circuit, and the modules included by the antenna selection circuit can be implemented in other ways. For example, the first front-end circuit can also include an HB combination circuit; or the MB 43 combination circuit, the MHB 44 combination circuit, and the LB 46 combination circuit can be arranged in a combined manner. Certainly, it can be understood that there may be other implementations not listed in this modality of this application through the use of examples. frfrfrenn / eznz / E / YiAi In this mode, a frequency band selection circuit is provided. The frequency band selection circuit can separately route a first radio frequency signal and a second radio frequency signal to one end of the HB signal, one end of the MB signal, or one end of the LB signal, where the HB filtering circuit can perform filtering on a radio frequency signal from the HB signal end, the MB filtering circuit can perform filtering on a radio frequency signal from the MB signal end, and the LB filtering circuit can perform filtering on a radio frequency signal from the LB signal end, where a first front-end radio frequency channel configured to send the first radio frequency signal and a second front-end radio frequency channel configured to send the second radio frequency signal can share a filtering circuit.This allows for the reduction of devices such as a filter and a duplexer at a radio frequency front end, thereby reducing the space occupied by a radio frequency front end module. Furthermore, the first and second front-end radio frequency channels can share a single antenna, thus reducing the number of antennas required. Different antennas can support the transmission of radio frequency signals from different frequency bands, thereby reducing the frequency ranges that the antenna needs to support. The next modality shown in Figure 7 of this application is described using an example where antenna module 240 includes seven antennas, i.e., N=7. Antenna module 240 includes four high-frequency antennas, two high-intermediate frequency antennas, and one low-frequency antenna. The high-frequency antenna is configured to support the transmission of a radio frequency signal from the 5G high-frequency band or the HB band. The high-intermediate frequency antenna is configured to support the transmission of a radio frequency signal from the MHB band. The low-frequency antenna is configured to support the transmission of a radio frequency signal from the LB band. The four high-frequency antennas are antenna 241, antenna 242, antenna 243, and antenna 244. The two high-intermediate frequency antennas are antennas 245 and antenna 246. The low-frequency antenna is antenna 247. Figure 7 is a schematic structural diagram of a 220 radio frequency front-end module according to one embodiment of this application. Based on the embodiment shown in Figure 6, in this embodiment, the description is provided using an example where n=3, m=2, and k=3; that is, the terminal device supports three HB frequency band numbers, two MB frequency band numbers, and three LB frequency band numbers. As shown in Figure 7, each of the HB filter circuit, the MB filter circuit, and the LB filter circuit of the radio frequency front-end module includes a plurality of filters and / or multiplexers. For example, the HB filter circuit may include two filters and one duplexer. n'=3.One input end of one filter is connected to the signal end of HB 311; and one output end of this filter is connected to port 1 of antenna selection switch 41. One input end of the other filter is connected to the signal end of HB 312; and one output end of this filter is connected to port 2 of antenna selection switch 41. One input end of the duplexer is connected to the signal end of HB 313; and one output end of this duplexer is connected to port 3 of antenna selection switch 41. Because a link between the duplexer and antenna selection switch 41 can be used as a receive link, synchronous receive and transmit can be implemented by placing the duplexer on this link. The filtering circuit of MB 32 may include a quadplexer. m'=1.Two input ends of the quadplexer are connected to the signal end of MB 321 and the signal end of MB 322; and one output end of the quadplexer is connected to the input end of the combining circuit of MB 43. Because a link between the quadplexer and the antenna selection switch 43 can be used as a receive link, synchronous receive and transmit can be implemented by placing the quadplexer in this link. For example, the filtering circuit of LB 33 may include a triplexer and a duplexer. k'=2. Two input ends of the triplexer are connected to the signal end of LB 332 and the signal end of LB 333; and one output end of the triplexer is connected to one input end of the LB 46 combination circuit. One input end of the duplexer is connected to the signal end of LB 331. One output end of the duplexer is connected to another input end of the LB 46 combination circuit.Because a link between the LB filter circuit and the LB 46 combiner circuit can be used as a receive link, synchronous receive and transmit can be implemented by placing a quadriplexer and duplexer on it. For example, one filter in the HB 31 filter circuit can be configured to filter the N41 and B41 RF signals; and another filter in the HB 31 filter circuit can be configured to filter the N40 and B40 RF signals. The duplexer in the HB 31 filter circuit can be configured to filter the N7 and B7 RF signals. The HB 220 RF front-end module can route the first and second RF signals from HB to the HB 31 filter circuit via the frequency band selection circuit 20, so that the two RF front-end channels can share one HB filter circuit. bbhQnn / QZnZ / B / YIAI A quad-plexer of the MB 32 filter circuit can be configured to perform filtering on the N1, B1, N3, and B3 RF signals. The 220 RF front-end module can route the first and second MB RF signals to the MB 32 filter circuit via the frequency band selection circuit 20, so that the two RF front-end channels can share one MB filter circuit. A triplexer in the LB 33 filter circuit can be configured to filter the RF signals from N28A, B28A, N20, and B20. The duplexer in the LB 31 filter circuit can be configured to filter the RF signals from N28B and B28B. The RF front-end module 220 can route the first and second RF signals from LB to the LB 33 filter circuit via frequency band selection circuit 20, so that the two RF front-end channels can share one LB filter circuit. In this mode, a frequency band selection circuit is arranged and a filter and / or multiplexer of different frequency bands are supported, so that a first front-end radio frequency channel configured to send a first radio frequency signal and a second front-end radio frequency channel configured to send a second radio frequency signal share the filter and / or multiplexer of different frequency bands.Therefore, on the premise that the terminal device supports the transmission of radio frequency signals of different standards in a dual connectivity application scenario, or the transmission of a radio frequency signal in a carrier aggregation application scenario, or the transmission of a radio frequency signal in a dual SIM or dual SIM dual activity application scenario, devices such as a filter and a duplexer at a radio frequency front end can be reduced, thereby reducing the space occupied by the radio frequency front end module. The next modality shown in Figure 8 of this application is described using an example where antenna module 240 includes eight antennas, i.e., N=8. Antenna module 240 includes four high-frequency antennas, two high-intermediate frequency antennas, and two low-frequency antennas. The high-frequency antenna is configured to support the transmission of a radio frequency signal from a 5G high-frequency band or the HB band. The high-intermediate frequency antenna is configured to support the transmission of a radio frequency signal from an MHB band. The low-frequency antenna is configured to support the transmission of a radio frequency signal from the LB band. The four high-frequency antennas are antenna 241, antenna 242, antenna 243, and antenna 244. The two intermediate-high frequency antennas are antennas 245 and antenna 246. The two low-frequency antennas are antenna 247 and antenna 248. Figure 8 is another schematic structural diagram of a radio frequency front-end module 220 and an antenna module 240 according to one embodiment of this application. Based on the embodiment shown in Figure 6 or Figure 7, in this embodiment, the output end of the second power amplifier 12 may include a third output end MB3 of MB and a third output end LB3 of LB. The combination circuit of MB 43 may further include another input end; and the input end is connected to the third output MB3 of MB. The combination circuit of LB 46 may further include another input end; and the input end is connected to the third output LB3 of LB. In some embodiments, some frequency ranges of second radio frequency signals supported by the terminal device do not overlap with a frequency range of the first radio frequency signal.The second radio frequency signal, which has a non-overlapping frequency band, can be output to the MB 43 combination circuit via the MB3 third output terminal of MB, or to the LB 46 combination circuit via the LB3 third output terminal of LB. The second power amplifier 12 is configured to: perform power amplification on the second radio frequency signal and output the amplified second radio frequency signal to the MB 43 combination circuit via the MB3 third terminal of MB; or, perform power amplification on the second radio frequency signal and output the amplified second radio frequency signal to the LB 46 combination circuit via the LB3 third output terminal of LB. In this configuration, the third frequency band selector switch 23 can also include one end of the LB 334 signal, which is k=4. The LB 334 signal end can be connected to an input end of the LB 46 combination circuit via the LB filter circuit. The LB 33 filter circuit can also include a connecting line. Consequently, k'=3. The connecting line is configured to connect the LB 334 signal end to an input end of the LB 46 combination circuit. The radio frequency front-end module may further include a primary receiver circuit and a plurality of diversity receiver circuits. For example, the primary receiver circuit may be HBNR_MPRX, shown in Figure 8; and the plurality of receiver circuits may include a first diversity receiver circuit HBNR_DRX, a second diversity receiver circuit HBNR_MDRX, a third diversity receiver circuit MB_DRX, and a fourth diversity receiver circuit LB_DRX. The antenna selection circuit may further include a switch 471, a switch 472, a switch 473, and a switch 474. Switch 471 is configured to selectively connect antenna 242 to an output end of antenna selection switch 42; or, it connects antenna 242 to an input end of the first diversity receiver circuit HBNRDRX.Switch 472 is configured to selectively connect antenna 243 to an output terminal of antenna selection switch 42; or, it connects antenna 243 to an input terminal of the primary receiver circuit HBNR_MPRX. Switch 473 is configured to selectively connect antenna 244 to an output terminal of antenna selection switch 42; or, it connects antenna 244 to an input terminal of the second diversity receiver circuit HBNR_MDRX. Antenna selection switch 45 may also include a port. The port is connected to an input terminal of the third diversity receiver circuit MBJDRX. Antenna selection switch 45 is further configured to connect either antenna 245 or antenna 246 to the input terminal of the third diversity receiver circuit MBJDRX.Switch 474 is configured to: selectively connect antenna 247 to one output end of combination circuit 46, and connect antenna 248 to one input end of the fourth diversity receiver circuit LBJDRX. The front-end radio frequency module and the antenna module in this mode can support the transmission and reception of the first radio frequency signal and the second radio frequency signal. The terminal device in the preceding modality of this application can support the simultaneous transmission of a first radio frequency signal of any frequency band and a second radio frequency signal of any frequency band. The first and second radio frequency signals can be of different standards. The terminal device can support dual LTE-NR connectivity, for example, DC_LB_MHB, DC_LB_5G high-frequency band, DC_MHB_LB, DC_MB_MB, DC_HB_MB, DC_MB_HB, DC_LB_MB, DC_MB_LB, DC_MB_5G high-frequency band, DC_HB_HB, DC_LB_HB, DC_HB_LB, DC_HB_5G high-frequency band, and DC_LB_LB. A radio frequency front-end module of a terminal device that supports different dual LTE-NR connectivity application scenarios is described below with reference to several specific application scenarios. Scenario 1: DC_LB_LB Figure 9 is another schematic structural diagram of another RF front-end module 220 and an antenna module 240 according to one modality of this application. As shown in Figure 9, the paths in Scenario 1 are marked with dashed lines and in bold. The terminal device may include devices and ports on the marked paths in Figure 9, and may include devices and ports on unmarked paths. The terminal device in this modality may support DC_LB_LB. In other words, the terminal device may support the simultaneous transmission of a 5G RF signal from the LB and a 4G RF signal from the LB. Specifically, the 5G RF signal from the LB may be used as the first RF signal TX1.When the first radio frequency signal converges with the LB frequency range, the first radio frequency signal is sent by the processor to the first power amplifier 11, amplified by the first power amplifier 11, and then sent to the third frequency band selection switch 23. Because the first radio frequency signal converges with the LB frequency range, the first radio frequency signal is routed by the third frequency band selection switch 23 to the LB 33 filter circuit, and then sent to antenna 247 through switch 474. The third frequency band selection switch 23 can send the first radio frequency signal to the LB 33 filter circuit through the LB 331 signal end, the LB 332 signal end, the LB 333 signal end, or the LB 333 signal end.The signal ends of LB 331, LB 332, LB 333, and LB 334 correspond to four sub-frequency bands within the LB frequency range, respectively. The signal end of the third frequency band selection switch 23, through which the first radio frequency signal is emitted, can be determined based on the sub-frequency band to which the first radio frequency signal belongs. The LB 4G radio frequency signal can be used as a second radio frequency signal, TX2. When the second radio frequency signal converges with the LB frequency range, the second radio frequency signal is sent by the processor to the first power amplifier 12, amplified by the second power amplifier 12, and then sent to the third frequency band selection switch 23.Because the second radio frequency signal converges with the LB frequency range, the second radio frequency signal is routed by the third frequency band selection switch 23 to the LB 33 filter circuit, and then output to antenna 247 through switch 474. The third frequency band selection switch 23 can output the second radio frequency signal to the LB 33 filter circuit through the LB 331 signal end, the LB 332 signal end, the LB 333 signal end, or the LB 333 signal end. One LB signal end of the third frequency band selection switch 23, through which the second radio frequency signal is output, can be determined based on a sub-frequency band to which the second radio frequency signal belongs. frfrfrenn / eznz / E / YiAi In Scenario 1, the RF front-end module in this application mode can support an NSA combination of one LB and another LB, and the first RF front-end channel configured to send the first RF signal and the second RF front-end channel configured to send the second RF signal can share a low-frequency antenna, thereby reducing the difficulty of antenna implementation. The RF front-end module 220 and the antenna module 240 can further support carrier aggregation of frequency bands in Scenario 1, i.e., carrier aggregation of one LB and another LB. An implementation principle is similar to that previously mentioned. The DCLBLB may include DC_20A_N28A, DC_28A_N20, DC_8A_N20A, DC_20A_N8A, DC_8A_N28A, DC_28A_N8A, DC_8A_N28B, DC_28B_N8A or similar. DC_LB_LB in Scenario 1 is illustrated schematically by using an example where the signal end of LB 331 corresponds to N28B and B28B, the signal end of LB 332 corresponds to N28A and B28A, the signal end of LB 333 corresponds to N20 and B20, and the signal end of LB 334 corresponds to N8 and B8. To implement DC_20A_N28Ao DC 28A N20, each terminal device module can use a state shown in Table 1. Table 1 Schematic table showing emitted signals and working states of the frfrfrenn / eznz / E / YiAi modules Device DC_20A_N28A DC_28A_N20 CA_20_28A CA_28A_20 TX2 B20 B28A B20 B28A TX1 N28A N20 Not used Not used Amplifier 11 N28A N20 Not used Not used Amplifier 12 B20 B28A B20 B28A Third frequency band selection switch 23 ETO2 FTO3 E TO 3 FTO2 E TO 2 FTO3 ETO3 FTO2 As shown in Table 1, during the implementation of DC 20A N28A, the frequency band of the first radio frequency signal is N28A, and the frequency band of the second radio frequency signal is B20. Figure 10A is a schematic structural diagram that implements DC_20A_N28A through a radio frequency front-end module according to one modality of this application. As shown in Figure 10A, after being amplified by the first power amplifier 11, the first radio frequency signal is output to the third frequency band selection switch 23 through the first output end LB1 of LB.Because the first radio frequency signal converges with the frequency range of LB and converges with N28A, processor 210 controls an input port E of the third frequency band selector switch 23 to connect with an output port 2; and the third frequency band selector switch 23 outputs the first amplified radio frequency signal to the filter circuit of LB 33 through output port 2 (i.e., the signal end of LB 332). After being amplified by the second power amplifier 12, the second radio frequency signal is output to the third frequency band selector switch 23 through the second output end LB2 of LB.Because the second radio frequency signal converges with the frequency range of LB and converges with B20, processor 210 controls an input port F of the third frequency band selection switch 23 to connect to an output port 3 (i.e., the signal end of LB 333); and the third frequency band selection switch 23 outputs the amplified second radio frequency signal to the filter circuit of LB 33 through output port 3 (i.e., the signal end of LB 333). After being processed by a duplexer in the filter circuit of LB 33, the first radio frequency signal and the second radio frequency signal are output to the combination circuit of LB 46, processed by the combination circuit of LB 46, and output to switch 474. During the implementation of DC_28A_N20, the frequency band of the first radio frequency signal is N20, and the frequency band of the second radio frequency signal is B28A. Figure 10B is a schematic structural diagram that implements DC_28A_N20 through a radio frequency front-end module according to one modality of this application. As shown in Figure 10B, after being amplified by the first power amplifier 11, the first radio frequency signal is output to the third frequency band selection switch 23 through the first output terminal LB1 of LB.Because the first radio frequency signal converges with the frequency range of LB and converges with N20, processor 210 controls an input port E of the third frequency band selector switch 23 to connect with an output port 3; and the third frequency band selector switch 23 outputs the first amplified radio frequency signal to the filter circuit of LB 33 through output port 3 (i.e., the signal end of LB 333). After being amplified by the second power amplifier 12, the second radio frequency signal is output to the third frequency band selector switch 23 through the second output end LB2 of LB.Because the second radio frequency signal converges with the LB frequency range and converges with B28A, processor 210 controls an input port F of the third frequency band selection switch 23 to connect with an output port 2 (i.e., the LB signal end frfrfrenn / eznz / E / YiAi). 332); and the third frequency band selection switch 23 outputs the second amplified radio frequency signal to the filter circuit of LB 33 via output port 2 (i.e., the signal end of LB 332). After being processed by a duplexer in the filter circuit of LB 33, the first radio frequency signal and the second radio frequency signal are output to the combiner circuit of LB 46, processed by the combiner circuit of LB 46, and output to switch 474. An implementation of CA_20_28A is similar to that of DC_20A_N28A, with the underlying difference being that TX2 is not used in an uplink process. An implementation of CA_28A_20 is similar to that of DC_28A_N20, with the underlying difference being that TX2 is not used in an uplink process. To implement DC_8A_N20A or DC_20A_N8A, each terminal device module can use a state shown in Table 2. frfrfrenn / eznz / E / YiAi Table 2 Schematic table showing emitted signals and working states of the modules Device DC_8A_N20A DC_B20_N8A TX2 B8 B20 TX1 N20 N8 Amplifier 11 N20 N8 Amplifier 12 B8 B20 Third frequency band selection switch 23 E_TO_3 F_TO_4 E_TO_4 F_TO_3 As shown in Table 2, during the implementation of DC 8A N20A, the frequency band of the first radio frequency signal is N20, and the frequency band of the second radio frequency signal is B8. Figure 10C is a schematic structural diagram that implements DC_8A_N20A through a radio frequency front-end module according to one modality of this application. As shown in Figure 10C, after being amplified by the first power amplifier 11, the first radio frequency signal is output to the third frequency band selection switch 23 through the first output end LB1 of LB.Because the first radio frequency signal converges with the frequency range of the LB and converges with N20, the processor 210 controls an input port E of the third frequency band selection switch 23 to connect with an output port 3; and the third frequency band selection switch 23 outputs the first amplified radio frequency signal to the filtering circuit of LB 33 through output port 3 (i.e., the signal end of LB 333). After being processed by a duplexer in the LB 33 filter circuit, the first radio frequency signal is sent to the LB 46 combiner circuit. After being amplified by the second power amplifier 12, the second radio frequency signal is sent to the third frequency band selector switch 23 via the second output end LB2 of LB. Because the second radio frequency signal converges with the frequency range of LB and converges with B8, processor 210 controls an input port F of the third frequency band selector switch 23 to connect to an output port 4 (i.e., the signal end of LB 334); and the third frequency band selector switch 23 sends the amplified second radio frequency signal to the LB 33 filter circuit via output port 4 (i.e., the signal end of LB 334).The second radio frequency signal is sent to the LB 46 combination circuit through a wire from the LB 33 filter circuit. After being processed by the LB 46 combination circuit, the first radio frequency signal and the second radio frequency signal are sent to switch 474. During the implementation of DC_20A_N8A, the frequency band of the first radio frequency signal is N8, and the frequency band of the second radio frequency signal is B20. Figure 10D is a schematic structural diagram that implements DC_20A_N8A through a radio frequency front-end module according to one modality of this application. As shown in Figure 10D, after being amplified by the first power amplifier 11, the first radio frequency signal is output to the third frequency band selection switch 23 through the first output end LB1 of LB.Because the first radio frequency signal converges with the frequency range of LB and converges with N8, processor 210 controls an input port E of the third frequency band selector switch 23 to connect with an output port 4; and the third frequency band selector switch 23 outputs the first amplified radio frequency signal to the filter circuit of LB 33 through output port 4 (i.e., the signal end of LB 334). The second radio frequency signal is output to the combiner circuit of LB 46 through a wire from the filter circuit of LB 33. After being amplified by the second power amplifier 12, the second radio frequency signal is output to the third frequency band selector switch 23 through the second output end LB2 of LB.Because the second radio frequency signal converges with the LB frequency range and with B20, processor 210 controls an input port F of the third frequency band selection switch 23 to connect to an output port 3; and the third frequency band selection switch 23 outputs the first amplified radio frequency signal to the LB 33 filter circuit via output port 3 (i.e., the LB 333 signal end). After being processed by a duplexer in the LB 33 filter circuit, the second radio frequency signal is output to the LB 46 combiner circuit. After being processed by the LB 46 combiner circuit, the first and second radio frequency signals are output to switch 474. To implement DC_8A_N28A or DC_28A_N8A, each terminal device module can use a state shown in Table 3. Table 3 Schematic table showing emitted signals and working states of the frfrfrenn / eznz / E / YiAi modules Device DC8AN28 A DCB28AN8 A TX2 B8 B28A TX1 N28A N8 Amplifier 11 B28A N8 Amplifier 12 N8 B28A Third frequency band selection switch 23 E_TO_2 F_TO_4 E_TO_4 F_TO_2 As shown in Table 3, during the implementation of DC_8A_N28A, the frequency band of the first radio frequency signal is N28A, and the frequency band of the second radio frequency signal is B8. Figure 10E is a schematic structural diagram that implements DC_8A_N28A through a radio frequency front-end module according to one modality of this application. As shown in Figure 10E, after being amplified by the first power amplifier 11, the first radio frequency signal is output to the third frequency band selection switch 23 through the first output end LB1 of LB.Because the first radio frequency signal converges with the frequency range of LB and converges with N28A, processor 210 controls an input port E of the third frequency band selector switch 23 to connect with an output port 2; and the third frequency band selector switch 23 outputs the first amplified radio frequency signal to the filter circuit of LB 33 through output port 2 (i.e., the signal end of LB 332). After being processed by a duplexer in the filter circuit of LB 33, the first radio frequency signal is output to the combiner circuit of LB 46. After being amplified by the second power amplifier 12, the second radio frequency signal is output to the third frequency band selector switch 23 through the second output end LB2 of LB.Because the second radio frequency signal converges with the frequency range of LB and converges with B8, processor 210 controls an input port F of the third frequency band selection switch 23 to connect to an output port 4 (i.e., the signal end of LB 334); and the third frequency band selection switch 23 outputs the amplified second radio frequency signal to the filter circuit of LB 33 through output port 4 (i.e., the signal end of LB 334). The second radio frequency signal is then output to the combiner circuit of LB 46 through a wire from the filter circuit of LB 33. After being processed by the combiner circuit of LB 46, the first and second radio frequency signals are output to switch 474. During the implementation of DC_28A_N8A, the frequency band of the first radio frequency signal is N8, and the frequency band of the second radio frequency signal is B28A. Figure 10F is a schematic structural diagram that implements DC_28A_N8A through a radio frequency front-end module according to one modality of this application. As shown in Figure 10F, after being amplified by the first power amplifier 11, the first radio frequency signal is output to the third frequency band selection switch 23 through the first output terminal LB1 of LB.Because the first radio frequency signal converges with the frequency range of LB and converges with N8, processor 210 controls an input port E of the third frequency band selector switch 23 to connect to an output port 4 (i.e., the signal end of LB 334); and the third frequency band selector switch 23 outputs the first amplified radio frequency signal to the filter circuit of LB 33 through output port 4 (i.e., the signal end of LB 334). The first radio frequency signal is then output to the combiner circuit of LB 46 through a wire from the filter circuit of LB 33. After being amplified by the second power amplifier 12, the second radio frequency signal is output to the third frequency band selector switch 23 through the second output end LB2 of LB.Because the second radio frequency signal converges with the frequency range of LB and converges with B28A, processor 210 controls an input port F of the third frequency band selection switch 23 to connect with an output port 2; and the third frequency band selection switch 23 outputs the amplified second radio frequency signal to the filter circuit of LB 33 through output port 2 (i.e., the signal end of LB 332). After being processed by a duplexer in the filter circuit of LB 33, the second radio frequency signal is output to the combiner circuit of LB 46. After being processed by the combiner circuit of LB 46, the first and second radio frequency signals are output to switch 474. To implement DC 8A N28B or DC28BN8A, each module of the terminal device frfrfrenn / eznz / E / YiAi can use a state shown in Table 4. Table 4 Schematic table showing emitted signals and working states of the frfrfrenn / eznz / E / YiAi modules Device DC8AN28 B DCB28BN8 A TX2 B8 B28B TX1 N28B N8 Amplifier 11 N28B N8 Amplifier 12 B8 B28B Third frequency band selection switch 23 E_TO_1 F_TO_4 E_TO_4 F_TO_1 As shown in Table 4, during the implementation of DC_8A_N28B, the frequency band of the first radio frequency signal is N28B, and the frequency band of the second radio frequency signal is B8. Figure 10G is a schematic structural diagram that implements DC_8A_N28B through a radio frequency front-end module according to one modality of this application. As shown in Figure 10G, after being amplified by the first power amplifier 11, the first radio frequency signal is output to the third frequency band selection switch 23 through the first output end LB1 of LB.Because the first radio frequency signal converges with the frequency range of LB and converges with N28B, processor 210 controls an input port E of the third frequency band selector switch 23 to connect with an output port 1; and the third frequency band selector switch 23 outputs the first amplified radio frequency signal to the filter circuit of LB 33 through output port 1 (i.e., the signal end of LB 331). After being processed by a duplexer in the filter circuit of LB 33, the first radio frequency signal is output to the combiner circuit of LB 46. After being amplified by the second power amplifier 12, the second radio frequency signal is output to the third frequency band selector switch 23 through the second output end LB2 of LB.Because the second radio frequency signal converges with the frequency range of LB and converges with B8, processor 210 controls an input port F of the third frequency band selection switch 23 to connect to an output port 4 (i.e., the signal end of LB 334); and the third frequency band selection switch 23 outputs the amplified second radio frequency signal to the filter circuit of LB 33 through output port 4 (i.e., the signal end of LB 334). The second radio frequency signal is then output to the combiner circuit of LB 46 through a wire from the filter circuit of LB 33. After being processed by the combiner circuit of LB 46, the first and second radio frequency signals are output to switch 474. During the implementation of DC_28B_N8A, the frequency band of the first radio frequency signal is N8, and the frequency band of the second radio frequency signal is B28B. Figure 10H is a schematic structural diagram that implements DC_28B_N8A through a radio frequency front-end module according to one modality of this application. As shown in Figure 10H, after being amplified by the first power amplifier 11, the first radio frequency signal is output to the third frequency band selection switch 23 through the first output terminal LB1 of LB.Because the first radio frequency signal converges with the frequency range of LB and converges with N8, processor 210 controls an input port E of the third frequency band selector switch 23 to connect with an output port 4; and the third frequency band selector switch 23 outputs the first amplified radio frequency signal to the filter circuit of LB 33 through output port 4 (i.e., the signal end of LB 334). The second radio frequency signal is output to the combiner circuit of LB 46 through a wire from the filter circuit of LB 33. After being amplified by the second power amplifier 12, the second radio frequency signal is output to the third frequency band selector switch 23 through the second output end LB2 of LB.Because the second radio frequency signal converges with the frequency range of LB and with B28B, processor 210 controls an input port F of the third frequency band selection switch 23 to connect to an output port 1 (i.e., the signal end of LB 331). The third frequency band selection switch 23 then outputs the amplified second radio frequency signal to the filter circuit of LB 33 via output port 1 (i.e., the signal end of LB 331). After being processed by a duplexer in the filter circuit of LB 33, the first radio frequency signal is output to the combiner circuit of LB 46. After being processed by the combiner circuit of LB 46, the first and second radio frequency signals are output to switch 474. Scenario 2: DCLBMHB and DCLB5G high frequency band Figure 11 is another schematic structural diagram of a radio frequency front-end module 220 and an antenna module 240 according to one modality of this application. As shown in Figure 11, the paths in Scenario 2 are marked with bold lines. The terminal device may include devices and ports on the paths marked in Figure 11, and may also include devices and ports on unmarked paths. The terminal device in this modality can support DC LB MHB and the DC_LB_5G high-frequency band frfrfrenn / eznz / E / YiAi. In other words, the terminal device can support the simultaneous transmission of a 5G radio frequency signal from the MHB or 5G high-frequency band and a 4G radio frequency signal from the LB. Specifically, the 5G radio frequency signal from the MHB or the 5G radio frequency signal from the high frequency G band can be used as a first TX1 radio frequency signal.When the first radio frequency signal converges with the MB frequency range or the HB frequency range, the first radio frequency signal is emitted by the processor to the first power amplifier 11, subjected to power amplification by the first power amplifier 11, and then emitted to the first frequency band selection switch 21 or the second frequency band selection switch 22. For example, when the first radio frequency signal converges with the HB frequency range, the first radio frequency signal is emitted by the processor to the first power amplifier 11, subjected to power amplification by the first power amplifier 11, and then emitted to the first frequency band selection switch 21.Because the first radio frequency signal converges with the HB frequency range, the first radio frequency signal is routed by the first frequency band selection switch 21 to the HB filter circuit 31, and then emitted to antenna 245 through antenna selection switch 41. The first frequency band selection switch 21 can emit the first radio frequency signal to the HB filter circuit 31 through the HB 311 signal end, the HB 332 signal end, the HB 333 signal end, or the HB 333 signal end. The HB 332 signal end, the HB 312 signal end, and the HB 313 signal end correspond to three sub-frequency bands of the HB frequency range, respectively.One end of the HB signal from the first frequency band selector switch 21, through which the first radio frequency signal is emitted, can be determined based on a sub-frequency band to which the first radio frequency signal belongs. When the first radio frequency signal converges with the MB frequency range, the first radio frequency signal is emitted by the processor to the first power amplifier 11, subjected to power amplification by the first power amplifier 11, and then emitted to the second frequency band selector switch 22.Because the first radio frequency signal converges with the MB frequency range, the first radio frequency signal is routed by the second frequency band selection switch 22 to the MB 32 filter circuit, and then emitted to antenna 245 through the MB 43 combination circuit, the combination circuit 44, and the antenna selection switch 45. The second frequency band selection switch 22 can emit the first radio frequency signal to the MB 32 filter circuit frfrfrenn / eznz / E / YiAi through either the MB 321 signal end or the MB 322 signal end. The MB 321 signal end and the MB 322 signal end correspond to two sub-frequency bands of the MB frequency range, respectively.One end of the MB signal from the second frequency band selection switch 22, through which the first radio frequency signal is emitted, can be determined based on a sub-frequency band to which the first radio frequency signal belongs. When the first radio frequency signal converges with the 5G high-frequency band range, the first radio frequency signal is emitted by the processor to the third power amplifier 13, undergoes power amplification by the third power amplifier 13, is emitted to the antenna selection switch 42, and then emitted to antenna 241 via the frequency band selection switch 42. The LB 4G radio frequency signal can be used as a second TX2 radio frequency signal.When the second radio frequency signal converges with the LB frequency range, the second radio frequency signal is emitted by the processor to the second power amplifier 12, amplified by the second power amplifier 12, emitted to the third frequency band selection switch 23 or the LB 46 combination circuit, routed to the LB 46 combination circuit via the third frequency band selection switch 23, and then emitted to antenna 247 via the LB 46 combination circuit. The third frequency band selection switch 23 can emit the second radio frequency signal to the LB 33 filter circuit via the signal end of LB 331, the signal end of LB 332, the signal end of LB 333, or the signal end of LB 334.The signal ends of LB 331, LB 332, LB 333, and LB 334 correspond to four sub-frequency bands of the LB frequency range, respectively. One signal end of the third frequency band selection switch 31, through which the second radio frequency signal is emitted, can be determined based on a sub-frequency band to which the second radio frequency signal belongs. Scenario 3: DC_MHB_LB Figure 12 is another schematic structural diagram of a radio frequency front-end module 220 and an antenna module 240 according to one modality of this application. As shown in Figure 12, the paths in Scenario 3 are marked with bold lines. The terminal device may include devices and ports on the paths marked in Figure 11, and may also include devices and ports on unmarked paths. The terminal device in this modality can support DC_MHB_LB. In other words, the terminal device can support the simultaneous transmission of a 4G radio frequency signal from MHB and a 5G radio frequency signal from LB. Specifically, the 5G radio frequency signal from LB can be used as the first radio frequency signal TX1, sent to the first power amplifier 11, and undergo power amplification by the first power amplifier 11.be sent to the third frequency band selection switch 23, routed to the LB 33 filter circuit via the third frequency band selection switch 23, filtered by the LB filter circuit, sent to the LB 46 combination circuit and then sent to antenna 247. The 4G radio frequency signal from MHB can be used as a second TX2 radio frequency signal, sent to the second power amplifier 12, undergo power amplification by the second power amplifier 12, sent to the first frequency band selection switch 21 or the second frequency band selection switch 22; routed to the HB 31 filter circuit via the first frequency band selection switch 21, then routed to the MHB 44 combination circuit or to antenna selection switch 45 via antenna selection switch 41,and finally be transmitted to antenna 245 via antenna selection switch 45; or be routed to the MB 32 filter circuit via the second frequency band selection switch 22, and then transmitted to antenna 245 via the MB 43 combination circuit, the MHB 44 combination circuit and antenna selection switch 45. Scenario 4: DC_MB_MB Figure 13 is another schematic structural diagram of a radio frequency front-end module 220 and an antenna module 240 according to one modality of this application. As shown in Figure 13, the paths in Scenario 4 are marked with bold lines. The terminal device may include devices and ports on the marked paths in Figure 13, and may also include devices and ports on unmarked paths. The terminal device in this modality may support DC_MB_MB. In other words, the terminal device may support the simultaneous transmission of a 5G radio frequency signal from the MB and a 4G radio frequency signal from the MB.Specifically, the MB 5G radio frequency signal can be used as a first TX1 radio frequency signal, emitted to the first power amplifier 11, undergo power amplification by the first power amplifier 11, emitted to the second frequency band selection switch 22, routed to the MB 32 filtering circuit via the second frequency band selection switch 22, and then emitted to antenna 245 via the MB 43 combination circuit.The MB 4G radio frequency signal can be used as a second TX2 radio frequency signal, emitted to the second power amplifier 12, undergo power amplification by the second power amplifier 12, emitted frfrfrenn / eznz / E / YiAi to the second frequency band selection switch 22, routed to the MB 32 filtering circuit via the second frequency band selection switch 22 and then emitted to antenna 245 via the MB 43 combination circuit. In Scenario 4, the radio frequency front-end module in this application mode can support an NSA combination of one MB and another MB, and can share the 245 antenna in a simultaneous transmission of the MB's 5G radio frequency signal and the MB's 4G radio frequency signal, thereby reducing the difficulty of antenna implementation. Scenario 5: DC_HB_MB Figure 14 is another schematic structural diagram of a 220 radio frequency front-end module and a 240 antenna module according to one modality of this application. As shown in Figure 14, the paths in Scenario 5 are marked with bold lines. The terminal device may include devices and ports on the marked paths in Figure 14, and may also include devices and ports on unmarked paths. The terminal device in this modality can support DC_HB_MB. In other words, the terminal device can support the simultaneous transmission of a 5G radio frequency signal from the MB and a 4G radio frequency signal from the HB.Specifically, the MB 5G radio frequency signal can be used as a first radio frequency end TX1, emitted to the first power amplifier 11, undergo power amplification by the first power amplifier 11, emitted to the second frequency band selection switch 22, routed to the MB 32 filtering circuit via the second frequency band selection switch 22, and then emitted to antenna 245 via the MB 43 combination circuit, the MHB 44 combination circuit, and the antenna selection switch 45.The HB 4G radio frequency signal can be used as a second TX2 radio frequency signal, emitted to the second power amplifier 12, undergo power amplification by the second power amplifier 12, emitted to the first frequency band selection switch 21, routed to the HB 31 filtering circuit via the first frequency band selection switch 21, then emitted to antenna 241 via antenna selection switch 41 and antenna selection switch 42, or emitted to antenna 245 via antenna selection switch 41, the MHB 44 combination circuit and antenna selection switch 45. Scenario 6: DC_MB_HB Figure 15 is another schematic structural diagram of a radio frequency front-end module 220 and an antenna module 240 according to one modality of this application. As shown in Figure 15, the paths in Scenario 6 are marked with bold lines. The terminal device may include devices and ports on the paths marked in Figure 15, and may also include devices and ports on unmarked paths. The terminal device in this modality can support DC_MB_HB. In other words, the terminal device can support the simultaneous transmission of a 5G radio frequency signal from the HB and a 4G radio frequency signal from the MB.Specifically, the HB 5G radio frequency signal can be used as a first TX1 radio frequency signal, emitted to the second power amplifier 11, undergo power amplification by the first power amplifier 11, emitted to the first frequency band selection switch 21, routed to the HB 31 filtering circuit via the first frequency band selection switch 21, and then emitted to antenna 241 via antenna selection switch 41 or emitted to antenna 245 via antenna selection switch 41 and the MHB 44 combination circuit.The MB 4G radio frequency signal can be used as a second TX2 radio frequency signal, emitted to the second power amplifier 12, undergo power amplification by the second power amplifier 12, emitted to the second frequency band selection switch 22, routed to the MB 32 filtering circuit via the second frequency band selection switch 22, and then emitted to antenna 245 via the MB 43 combination circuit and the MBH 44 combination circuit. Scenario 7: DC_LB_MB Figure 16 is another schematic structural diagram of a radio frequency front-end module 220 and an antenna module 240 according to one modality of this application. As shown in Figure 16, the paths in Scenario 7 are marked with bold lines. The terminal device may include devices and ports on the marked paths in Figure 16, and may also include devices and ports on unmarked paths. The terminal device in this modality can support DC_LB_MB. In other words, the terminal device can support the simultaneous transmission of a 5G radio frequency signal from the MB and a 4G radio frequency signal from the LB.Specifically, the MB 5G radio frequency signal can be used as a first TX1 radio frequency signal, emitted to the first power amplifier 11, undergo power amplification by the first power amplifier 11, emitted to the second frequency band selection switch 22, routed to the MB 32 filtering circuit via the second frequency band selection switch 22, and then emitted to antenna 245 via the MB 43 combination circuit.The LB 4G radio frequency signal can be used as a second TX2 radio frequency signal, emitted to the second power amplifier 12, undergo power amplification by the second power amplifier 12, emitted frfrfrenn / eznz / E / YiAi to the third frequency band selection switch 23 or emitted directly to the LB 46 combination circuit, routed to the LB 33 filtering circuit via the third frequency band selection switch 23 and then emitted to antenna 247 via the LB 46 combination circuit. Scenario 8: DC_MB_LB Figure 17 is another schematic structural diagram of a radio frequency front-end module 220 and an antenna module 240 according to one modality of this application. As shown in Figure 17, the paths in Scenario 8 are marked with bold lines. The terminal device may include devices and ports on the marked paths in Figure 17, and may also include devices and ports on unmarked paths. The terminal device in this modality can support DC_MB_LB. In other words, the terminal device can support the simultaneous transmission of a 5G radio frequency signal from the LB and a 4G radio frequency signal from the MB.Specifically, the LB 5G radio frequency signal can be used as a first TX1 radio frequency signal, emitted to the first power amplifier 11, undergo power amplification by the first power amplifier 11, emitted to the third frequency band selection switch 23, routed to the LB 33 filtering circuit via the third frequency band selection switch 23, and then emitted to antenna 247 via the LB 46 combination circuit.The MB 4G radio frequency signal can be used as a second TX2 radio frequency signal, emitted to the second power amplifier 12, undergo power amplification by the second power amplifier 12, emitted to the second frequency band selection switch 22 or the MB 43 combination circuit, routed to the MB 32 filtering circuit via the second frequency band selection switch 22, and then emitted to antenna 245 via the MB 43 combination circuit. Scenario 9: DC_MB_5G High Frequency Band Figure 18 is another schematic structural diagram of a radio frequency front-end module 220 and an antenna module 240 according to one modality of this application. As shown in Figure 18, the paths in Scenario 9 are marked with bold lines. The terminal device may include devices and ports on the paths marked in Figure 18, and may also include devices and ports on unmarked paths. The terminal device in this modality can support the DC_MB_5G high-frequency band. In other words, the terminal device can support the simultaneous transmission of a 5G radio frequency signal from the 5G high-frequency band and a 4G radio frequency signal from the MB.Specifically, the 5G radio frequency signal of the frfrfrenn / eznz / E / YiAi high frequency 5G band can be used as a first radio frequency signal TX1, emitted to the third power amplifier 13, subjected to power amplification by the third power amplifier 13, emitted to the antenna selection switch 42 and then emitted to antenna 241 through the frequency band selection switch 42.The MB 4G radio frequency signal can be used as a second TX2 radio frequency signal, emitted to the second power amplifier 12, undergo power amplification by the second power amplifier 12, emitted to the second frequency band selection switch 22 or the MB 43 combination circuit, routed to the MB 32 filtering circuit via the second frequency band selection switch 22, and then emitted to antenna 245 via the MB43 combination circuit. Scenario 10: DC_HB_HB Figure 19 is another schematic structural diagram of a radio frequency front-end module 220 and an antenna module 240 according to one modality of this application. As shown in Figure 19, the paths in Scenario 10 are marked with bold lines. The terminal device may include devices and ports on the marked paths in Figure 19, and may also include devices and ports on unmarked paths. The terminal device in this modality may support DC_HB_HB. In other words, the terminal device may support the simultaneous transmission of a 5G radio frequency signal from HB and a 4G radio frequency signal from HB.Specifically, the HB 5G radio frequency signal can be used as a first TX1 radio frequency signal, emitted to the first power amplifier 11, undergo power amplification by the first power amplifier 11, emitted to the first frequency band selection switch 21, routed to the HB 31 filtering circuit through the second frequency band selection switch 21, and then emitted to antenna 241 or antenna 245 through antenna selection switch 41.The HB 4G radio frequency signal can be used as a second TX2 radio frequency signal, emitted to the first power amplifier 12, undergo power amplification by the first power amplifier 12, emitted to the first frequency band selection switch 21, routed to the HB 31 filter circuit via the first frequency band selection switch 21 and then emitted to antenna 241 or antenna 245 via antenna selection switch 41. Scenario 11: DC_LB_HB Figure 20 is another schematic structural diagram of a radio frequency front-end module 220 and an antenna module 240 according to one modality of this application. As shown in Figure 20, the paths in Scenario 11 are marked with bold lines. The terminal device may include devices and ports on the paths marked in Figure 20, and may also include devices and ports on unmarked paths. The terminal device in this modality can support DC_LB_HB. In other words, the terminal device can support the simultaneous transmission of a 5G radio frequency signal from the HB and a 4G radio frequency signal from the LB.Specifically, the HB 5G radio frequency signal can be used as a first TX1 radio frequency signal, emitted to the first power amplifier 11, undergo power amplification by the first power amplifier 11, emitted to the first frequency band selection switch 21, routed to the HB 31 filtering circuit through the second frequency band selection switch 21, and then emitted to antenna 241 or antenna 245 through antenna selection switch 41.The LB 4G radio frequency signal can be used as a second TX2 radio frequency signal, broadcast to the second power amplifier 12, undergo power amplification by the second power amplifier 12, broadcast to the third frequency band selection switch 23 or broadcast directly to the LB 46 combination circuit, routed to the LB 33 filter circuit via the third frequency band selection switch 23 and then broadcast to antenna 247 via the LB 46 combination circuit. Scenario 12: DC_HB_LB Figure 21 is another schematic structural diagram of a radio frequency front-end module 220 and an antenna module 240 according to one modality of this application. As shown in Figure 21, the paths in Scenario 12 are marked with bold lines. The terminal device may include devices and ports on the marked paths in Figure 21, and may also include devices and ports on unmarked paths. The terminal device in this modality can support DC_HB_LB. In other words, the terminal device can support the simultaneous transmission of a 5G radio frequency signal from the LB and a 4G radio frequency signal from the HB.Specifically, the LB 5G radio frequency signal can be used as a first TX1 radio frequency signal, emitted to the first power amplifier 11, undergo power amplification by the first power amplifier 11, emitted to the third frequency band selection switch 23, routed to the LB 33 filtering circuit via the third frequency band selection switch 23, and then emitted to antenna 247 via the LB 46 combination circuit.The HB 4G radio frequency signal can be used as a second TX2 radio frequency signal, emitted to the first power amplifier 12, undergo power amplification by the first power amplifier 12, emitted to the first frequency band selection switch 21, routed to the HB frfrfrenn / eznz / E / YiAi filtering circuit via the first frequency band selection switch 21 and then emitted to antenna 245 or antenna 241 via antenna selection switch 41. Scenario 13: DC_HB_5G High Frequency Band Figure 22 is another schematic structural diagram of a radio frequency front-end module 220 and an antenna module 240 according to one modality of this application. As shown in Figure 22, the paths in Scenario 12 are marked with bold lines. The terminal device may include devices and ports on the paths marked in Figure 22, and may also include devices and ports on unmarked paths. The terminal device in this modality can support the DC HB 5G high-frequency band. In other words, the terminal device can support the simultaneous transmission of a 5G radio frequency signal from the 5G high-frequency band and a 4G radio frequency signal from the HB band.Specifically, the 5G radio frequency signal from the 5G high frequency band can be used as a first radio frequency signal TX1, be sent to the third power amplifier 13, undergo power amplification by the third power amplifier 13, be sent to the antenna selection switch 42, and then sent to antenna 241 via frequency band selection switch 42. The 4G radio frequency signal from the HB can be used as a second radio frequency signal TX2, be sent to the first power amplifier 12, undergo power amplification by the first power amplifier 12, be sent to the first frequency band selection switch 21, be routed to the HB 31 filtering circuit via the first frequency band selection switch 21, and then sent to antenna 245 via antenna selection switch 41. The RF front-end module 220 and the antenna module 240 in any of the preceding scenarios can also support carrier aggregation of the frequency bands in these. One implementation principle is similar to that previously mentioned. The details are not described again here. The radio frequency front-end module in the modalities of this application can enable the terminal device to support DC or AC in the preceding scenarios of the application, thereby improving the performance of the user's terminal device. The radio frequency front-end module in the modalities of this application can alternatively be applied to a multi-SIM terminal device. The multi-SIM terminal device can support DSDA, so that a user can perform services simultaneously using two SIM cards. One implementation principle is similar to that of the previous DC, with the difference that the first radio frequency signal and the second radio frequency signal are radio frequency signals from different SIM cards. For example, the first radio frequency signal is a radio frequency signal from the first SIM card, and the second radio frequency signal is a radio frequency signal from the second SIM card; or the first radio frequency signal is a radio frequency signal from the second SIM card, and the second radio frequency signal is a radio frequency signal from the first SIM card. For example, in a case where the first SIM card supports an LTE LB frequency band and the second SIM card supports a 5G MHB frequency band, a radio frequency signal from the first SIM card can be sent as the second radio frequency signal, and vice versa. This implements DSDA. For a specific implementation principle, please refer to a specific implementation of Scenario 1. The details are not described again here. Similarly, two SIM cards of different standards and frequency bands are enabled to implement DSDA via the radio frequency front-end module in the modalities of this application. For an implementation principle, please refer to the specific implementations of the preceding scenarios. The details are not described again in this document. It should be noted that the radio frequency front-end module in the configurations of this application can also support two SIM cards of the same standard but different frequency bands to implement DSDA. Power supply circuits 231 and 232 are required to support power supplies for two different standards, and the first amplifier 11 and second amplifier 12 must also support two different standards. For example, LTE and 5G are supported. For an implementation principle, please refer to the specific implementations of the preceding scenarios. The details are not described again herein. One variant of this application also provides a wireless communication method. This method can be implemented by the terminal device itself or by a processor or chip within the terminal device. The wireless communication method includes the following steps: Stage 101: A first power amplifier performs power amplification on a first radio frequency signal, and a second power amplifier performs power amplification on a second radio frequency signal. Stage 102: The frequency band selection circuit routes the first amplified radio frequency signal to the first front-end circuit when the first radio frequency signal converges with a first frequency band, and routes the second amplified radio frequency signal to the first front-end circuit when the second radio frequency signal converges with a second frequency band, where the first front-end circuit supports both the first frequency band and the second frequency band. Stage 103: The first front-end circuit performs filtering and / or combining at least one of the first amplified radio frequency signal or the second amplified radio frequency signal, to obtain a first transmission signal. Step 104: The antenna module transmits the first transmission signal. In some embodiments, the method may also include: routing, via the frequency band selection circuit, the first amplified radio frequency signal to the second front-end circuit when the first radio frequency signal converges with a third frequency band, and routing the second amplified radio frequency signal to the second front-end circuit when the second radio frequency signal converges with a fourth frequency band, where the second front-end circuit supports both the third and fourth frequency bands; performing, via the second front-end circuit, filtering and / or combining at least one of the first amplified radio frequency signal or the second amplified radio frequency signal to obtain a second transmission signal, and transmitting, via the antenna module, the second transmission signal. In some embodiments, the method may also include: routing, via the frequency band selection circuit, the first amplified radio frequency signal to the third circuit at the front end when the first radio frequency signal converges with a third frequency band, and routing the second amplified radio frequency signal to the third circuit at the front end when the second radio frequency signal converges with a sixth frequency band, where the third circuit at the front end supports the fifth and fourth frequency bands; performing, via the third circuit at the front end, filtering and / or combining at least one of the first amplified radio frequency signal or the second amplified radio frequency signal to obtain a third transmission signal, and transmitting, via the antenna module, the third transmission signal. In some embodiments, a first power amplifier performing power amplification on a first radio frequency signal may specifically include: performing, by means of a third power amplifier, power amplification on the first radio frequency signal when a frequency of the first radio frequency signal belongs to a fourth frequency interval, and emitting a first amplified radio frequency signal to the frequency band selection circuit; and performing, by means of the first power amplifier, power amplification on the first radio frequency signal when the frequency of the first radio frequency signal belongs to the first frequency interval, the second frequency interval, or a third frequency interval, and emitting a first amplified radio frequency signal to the frequency band selection circuit;to route, by means of the frequency band selection circuit, the first amplified radio frequency signal to a fourth front-end circuit when the frequency of the first radio frequency signal belongs to the fourth frequency interval; to perform, by means of the fourth front-end circuit, filtering of the first amplified radio frequency signal to obtain a fourth transmit signal, or to use the first amplified radio frequency signal as a fourth transmit signal; and to transmit, by means of the antenna module, the fourth transmit signal. In some modes, transmitting the fourth transmission signal via the antenna module may specifically include: emitting the fourth transmission signal to one or more of the first r antennas via an antenna selection circuit and emitting the first transmission signal to one or more of the second N-r+1 antennas when the frequency of the first radio frequency signal belongs to the 5G high frequency band and the frequency of the second radio frequency signal belongs to the HB frequency range, where the first antenna supports the 5G high frequency band and the second antenna supports the HB frequency range. For a description of the implementation principle and the effect of implementing this modality, refer to the description of the modality in the preceding structure. These details are not described again in this document. One embodiment of this application further provides a terminal device. The terminal device may include a processor, a plurality of antennas, and the radio frequency front-end module according to any of the preceding embodiments. The radio frequency front-end module is separately coupled to the processor and the plurality of antennas. The radio frequency front-end module receives a first radio frequency signal and a second radio frequency signal from the processor. One version of this application also provides a processor. The processor is configured to control a radio frequency front-end module to execute the wireless communication method described above. One embodiment of this application further provides a chip, which includes a processor and a memory, wherein the memory is configured to store a computer instruction, and the processor is configured to invoke and execute the computer instruction stored in the memory, thereby controlling a front-end module of frfrfrenn / eznz / E / YiAi radio frequency to execute the wireless communication method described above. The processor mentioned in the preceding modality can be an integrated circuit chip and have signal processing capabilities. During implementation, the steps of the preceding method can be implemented using a hardware integrated logic circuit within the processor or by using software instructions. The processor can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or another programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component. The general-purpose processor can be a microprocessor, or the processor can be any conventional processor or similar device.The steps of the methods disclosed in the modalities of this application can be performed and completed directly using a hardware encoding processor, or they can be performed and completed using a combination of hardware and software modules in the encoding processor. The software module can be stored in a storage medium proven in the art, such as RAM, flash memory, read-only memory (ROM), programmable ROM, electronically erasable programmable memory, or a register. The storage medium is located in memory. The processor reads information from memory and completes the steps of the preceding methods in conjunction with the hardware of those methods. The memory mentioned in the preceding modalities can be volatile or non-volatile, or it can include both. Non-volatile memory can be read-only memory (ROM), programmable ROM (PROM), erasable PROM (EPROM), electrically erasable EPROM (EEPROM), or flash memory. Volatile memory can be random access memory (RAM) and is used as an external cache.Throughout this illustrative rather than restrictive description, many forms of RAM are available, for example, static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronlink DRAM (SLDRAM), and direct rambus RAM (DRRAM). It should be noted that the memory involved in the systems and methods described in this document is intended to include, but is not limited to, these memories and memory of any other suitable type. A person of ordinary skill in the art may be aware that, in combination with the examples described in the modalities disclosed in this specification, the algorithm's units and steps can be implemented using electronic hardware or a combination of computer software and electronic hardware. Whether the functions are performed by hardware or software depends on the particular applications and the design constraints of the technical solutions. A person skilled in the art may use different methods to implement the described functions for each particular application, but such implementation should not be considered to be beyond the scope of this application. It may be clearly understood by a person experienced in the technique that, for the purpose of a convenient and brief description, for a detailed working process of the above system, apparatus and unit, reference is made to a corresponding process in the modalities of the above method and details are not described again herein. In the various embodiments provided in this application, it should be understood that the described system, apparatus, and method may be implemented in other ways. For example, the embodiment of the described apparatus is merely an example. For example, the unit division is merely a division of logical functions and may be a different division in an actual implementation. For example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted or not implemented. Furthermore, the mutual couplings or couplings visualized or discussed, or the direct couplings or communication connections, may be implemented using certain interfaces. Indirect couplings or communication connections between the apparatus or units may be implemented electrically, mechanically, or otherwise. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units. They may be located in one place or distributed across multiple network units. Some or all of the units may be selected according to the actual requirements for achieving the objectives of the solution modalities. Furthermore, the functional units in the modalities of this application may be integrated into a processing unit, or each of the units may physically exist alone, or two or more units may be integrated into one unit. When functions are implemented as a functional software unit and sold or used as a standalone product, the functions may be stored on a computer-readable storage medium. Based on this understanding, the technical solutions of this application, or the contributing part thereof, or some of the technical solutions, may be implemented as a software product. The software product is stored on a storage medium and includes various instructions for instructing a computing device (a personal computer, a server, or a network device) to perform all or some of the steps of the methods described in the modalities of this application.The preceding storage medium includes: any medium that can store programming code, such as a USB flash drive, a removable hard drive, read-only memory (ROM), random access memory (RAM), a magnetic disk, or a compact disc. The foregoing descriptions are merely specific implementations of this application, but are not intended to limit the scope of protection of this application. Any variation or replacement readily visualized by a person skilled in the art within the technical scope described herein shall fall within the scope of protection of this application. Therefore, the scope of protection of this application shall be used as the scope of protection of the claims. Option 1: A wireless communications system, which includes: a first power amplifier, a second power amplifier, a frequency band selection circuit, a first front-end circuit, and an antenna module. The first and second power amplifiers are separately coupled to the frequency band selection circuit. The first front-end circuit is separately coupled to the frequency band selection circuit and the antenna module. The first power amplifier is configured to amplify a first radio frequency signal and output an amplified radio frequency signal to the frequency band selection circuit. The second power amplifier is configured to amplify a second radio frequency signal and output an amplified radio frequency signal to the frequency band selection circuit. The frequency band selection circuit is configured to: route the first amplified radio frequency signal to the first front-end circuit when the first radio frequency signal converges with a first frequency band, and route the second amplified radio frequency signal to the first front-end circuit when the second radio frequency signal converges with a second frequency band, wherein the first front-end circuit supports both the first frequency band and the second frequency band. frfrfrenn / eznz / E / YiAi The first circuit at the front end is configured to perform filtering and / or combining at least one of the first amplified radio frequency signal or the second amplified radio frequency signal, to obtain a first transmission signal. The antenna module is configured to transmit the first transmission signal. Mode 2: According to the system in Mode 1, the first frequency band and the second frequency band belong to a first frequency interval. Mode 3: According to the system in Mode 2, the first frequency interval includes a frequency interval of a high frequency band HB, a frequency interval of an intermediate frequency band MB, or a frequency interval of a low frequency band LB. Mode 4: According to the system in Modes 1 to 3, the frequency band selection circuit includes signal ends of the first n subfrequency bands, the signal ends of the first n subfrequency bands are coupled separately with the first front-end circuit, and n is a positive integer. The frequency band selection circuit is configured so that: when the first radio frequency signal converges with the first frequency band and a first sub-frequency band of the first n sub-frequency bands, it emits the first amplified radio frequency signal to the first front end of the circuit through one end of the signal of the first sub-frequency band; and when the second radio frequency signal converges with the second frequency band and a first sub-frequency band of the first n sub-frequency bands, it emits the second amplified radio frequency signal to the first circuit of the front end through the end of the signal of the first sub-frequency band, where the first n sub-frequency bands belong to the first frequency interval. Mode 5: According to the system in any of Modes 1 to 4, the antenna module includes r first antennas, yr is an integer greater than 1. The first antennas are configured to transmit the first transmit signal emitted by the first front-end circuit. Mode 6: In accordance with the system in any of Modes 2 to 5, the system also includes a second front-end circuit. The frequency band selection circuit is further configured to: route the first amplified radio frequency signal to the second front-end circuit when the first radio frequency signal converges with a third frequency band, and route the second amplified radio frequency signal to the second front-end circuit 52 when the second radio frequency signal converges with a fourth frequency band, where the second front-end circuit supports the third frequency band and the fourth frequency band. The second circuit at the front end is configured to perform filtering and / or combining at least one of the first amplified radio frequency signal or the second amplified radio frequency signal, to obtain a second transmission signal. The antenna module is also configured to transmit the second transmission signal. Mode 7: According to the system in Mode 6, the third frequency band and the fourth frequency band belong to a second frequency interval. Mode 8: In accordance with the system in Mode 7, each of the first frequency interval and the second frequency interval includes any two of the frequency intervals of the high frequency band HB, the frequency interval of the intermediate frequency band MB, or the frequency interval of the low frequency band LB. Mode 9: According to the system in any of Modes 6 to 8, the frequency band selection circuit further includes signal ends of m second subfrequency bands, the signal ends of the m second subfrequency bands are coupled separately with the second front-end circuit, ym being a positive integer. The frequency band selection circuit is further configured to: when the first radio frequency signal converges with the third frequency band and a second sub-frequency band of the m second sub-frequency bands, emit the first amplified radio frequency signal to the second front end of the circuit through one end of the signal of the second sub-frequency band; and when the second radio frequency signal converges with the fourth frequency band and a second sub-frequency band of the m second sub-frequency bands, emit the second amplified radio frequency signal to the second circuit of the front end through the end of the signal of the second sub-frequency band, where the m second sub-frequency bands belong to the second frequency interval. Mode 10: According to the system in any of Modes 6 to 9, the antenna module includes N-r+1 second antennas, and N is an integer greater than 2. The N-r+1 second antennas are configured to transmit the second transmit signal emitted by the second front-end circuit. Mode 11: In accordance with the system in Mode 10, the system further includes an antenna selection circuit, wherein one input end of the antenna selection circuit is separately coupled to one output end of the first front-end circuit and one output end of the second front-end circuit, one output end of the antenna selection circuit is coupled to the antenna module, and the antenna selection circuit is configured to transmit the first signal to one or more of the first r antennas or the N-r+1 second antennas, and transmit the second signal to one or more of the N-r+1 second antennas. Mode 12: In accordance with the system in any of Modes 7 to 11, the system also includes a third front-end circuit. The frequency band selection circuit is further configured to: route the first amplified radio frequency signal to the third front-end circuit when the first radio frequency signal converges with a fifth frequency band, and route the second amplified radio frequency signal to the third front-end circuit when the second radio frequency signal converges with a sixth frequency band, wherein the third front-end circuit supports both the fifth and sixth frequency bands. The third circuit at the front end is configured to process at least one of the first amplified radio frequency signal or the second amplified radio frequency signal to obtain a third transmission signal. In some modes, the processing includes filtering and / or combining. The antenna module is also configured to transmit the third transmission signal. Mode 13: According to the system in Mode 12, the fifth frequency band and the sixth frequency band belong to a third frequency interval. Mode 14: According to the system in Mode 13, each of the first frequency interval, the second frequency interval, and the third frequency interval is one of the frequency interval of the high-frequency band HB, the frequency interval of the intermediate-frequency band MB, or the frequency interval of the low-frequency band LB, respectively. Any two of the first frequency interval, the second frequency interval, and the third frequency interval are different. Mode 15: According to the system in any of Modes 12 to 14, the frequency band selection circuit further includes signal ends of k third subfrequency bands, the signal ends of the k third subfrequency bands are coupled separately with the third front end circuit, and k is a positive integer. The frequency band selection circuit is further configured to: when the first radio frequency signal merges with the fifth frequency band and a third sub-frequency band of the k third sub-frequency bands, emit the first amplified radio frequency signal to the third circuit at the front end through one end of the signal of the third sub-frequency band; and when the second radio frequency signal merges with the sixth frequency band and a third sub-frequency band of the k third sub-frequency bands, emit the second amplified radio frequency signal to the third circuit at the front end through the end of the signal of the third sub-frequency band, where the k third sub-frequency bands belong to the third frequency interval. Mode 16: In accordance with the system in any of Modes 12 to 15, the system further includes an antenna selection circuit, wherein one input end of the antenna selection circuit is separately coupled to one output end of the first front-end circuit, one output end of the front-end circuit and one output end of the third front-end circuit, one output end of the antenna selection circuit is coupled to the antenna module, and the antenna selection circuit is configured to transmit the first transmission signal to the first r antennas, transmit the second transmission signal to one or more of the second N-r+1 antennas, and transmit the third transmission signal to one or more of the second N-r+1 antennas. Mode 17: According to the system in Mode 3, 8 or 14, the frequency range of the high frequency band HB includes frequencies from 2.3 GHz to 2.7 GHz; the frequency range of the intermediate frequency band MB includes frequencies from 1.7 GHz to 2.3 GHz; and the frequency range of the low frequency band LB includes frequencies below 1000 MHz. Mode 18: According to the system in any of Modes 1 to 17, the first radio frequency signal and the second radio frequency signal are of different standards. Mode 19: According to the system in any of Modes 1 to 17, the first radio frequency signal is a 5G radio frequency signal, and the second radio frequency signal is a 4G radio frequency signal. Mode 20: According to the system in any of Modes 1 to 17, the first radio frequency signal and the second radio frequency signal are of the same standard, but from different carriers. Mode 21: According to the system in any of Modes 1 to 20, the first radio frequency signal and the second radio frequency signal correspond to different SIM cards. Mode 22: According to the system in Mode 21, the first radio frequency signal and the second radio frequency signal are from the same carrier. Mode 23: According to the system in any of Modes 1 to 22, the first radio frequency signal and the second radio frequency signal correspond to different services. Mode 24: According to the system in Mode 23, the service includes a voice call service or a data service. Mode 25: In accordance with the system in any of Modes 1 to 24, the system also includes a third power amplifier and a fourth front-end circuit. The third power amplifier is configured to amplify the first radio frequency signal when its frequency falls within the fourth frequency band, and it outputs an amplified first radio frequency signal to the frequency band selection circuit. The first power amplifier is configured to amplify the first radio frequency signal when its frequency falls within the first, second, or third frequency band, and it outputs an amplified first radio frequency signal to the frequency band selection circuit. The frequency band selection circuit is also configured to route the first amplified radio frequency signal to the fourth front-end circuit when the frequency of the first radio frequency signal belongs to the fourth frequency range. The fourth circuit at the front end is configured to perform filtering on the first amplified radio frequency signal to obtain a fourth transmission signal, or to use the first amplified radio frequency signal as a fourth transmission signal. The antenna module is also configured to transmit the fourth transmission signal. Mode 26: According to the system in Mode 25, the fourth frequency interval includes a 5G high frequency band. Mode 27: According to the system in Mode 26, the frequency range of the 5G high frequency band includes frequencies from 2.7 GHz to 7.2 GHz. Mode 28: In accordance with the system in any of Modes 25 to 27, the system also includes an antenna selection circuit. The antenna selection circuit is configured to transmit the fourth transmission signal to one or more of the first antennas and transmit the first transmission signal to one or more of the second antennas N-r+1 when the frequency of the first radio frequency signal belongs to the 5G high frequency band frfrfrenn / eznz / E / YiAi and the frequency of the second radio frequency signal belongs to the HB frequency range. The first antenna supports the 5G high-frequency band, and the second antenna supports the HB frequency range. Mode 29: A wireless communication method, which includes: to perform, by means of a first power amplifier, power amplification in a first radio frequency signal; to perform, by means of a second power amplifier, power amplification in a second radio frequency signal; to route, by means of a frequency band selection circuit, a first radio frequency signal to a first front-end circuit when the first radio frequency signal converges with a first frequency band; to route, by means of the frequency band selection circuit, an amplified radio frequency signal to the first front-end circuit when the second radio frequency signal converges with a second frequency band, wherein the first front-end circuit supports both the first frequency band and the second frequency band; Perform, by means of the first circuit at the front end, the filtering and / or combination in at least one of the first amplified radio frequency signal or the second amplified radio frequency signal, to obtain a first transmission signal; and transmit, by means of the antenna module, the first transmission signal. Mode 30: According to the system in Mode 29, the first frequency band and the second frequency band belong to a first frequency interval. Mode 31: According to the system in Mode 31, the first frequency interval includes a frequency interval of a high frequency band HB, a frequency interval of an intermediate frequency band MB, or a frequency interval of a low frequency band LB. Modality 32: In accordance with the method in Modality 30 or 31, the method also includes: route, by means of the frequency band selection circuit, the first amplified radio frequency signal to a second front-end circuit when the first radio frequency signal converges with a third frequency band; route, by means of the frequency band selection circuit, the second amplified radio frequency signal to the second front-end circuit when the second radio frequency signal converges with a fourth frequency band, wherein the second front-end circuit supports the third frequency band and the fourth frequency band; frfrfrenn / eznz / E / YiAi perform, by means of the second circuit at the front end, the filtering and / or combination in at least one of the first amplified radio frequency signal or the second amplified radio frequency signal, to obtain a second transmission signal; and transmit, by means of the antenna module, the second transmission signal. Mode 33: According to the method in Mode 32, the third frequency band and the fourth frequency band belong to a second frequency interval. Mode 34: In accordance with the method in Mode 33, each of the first frequency interval and the second frequency interval includes any two of the frequency intervals of the high frequency band HB, the frequency interval of the intermediate frequency band MB, or the frequency interval of the low frequency band LB. Modality 35: In accordance with the method in any one of Modalities 30 to 34, the method also includes: Using the frequency band selection circuit, route the first amplified radio frequency signal to a third front-end circuit when the first radio frequency signal converges with a fifth frequency band, and route the second amplified radio frequency signal to the third front-end circuit when the second radio frequency signal converges with a sixth frequency band, wherein the third front-end circuit supports both the fifth and sixth frequency bands. Perform, by means of the third circuit at the front end, the filtering and / or combination in at least one of the first amplified radio frequency signal or the second amplified radio frequency signal, to obtain a third transmission signal; and transmit, by means of the antenna module, the third transmission signal. Mode 36: According to the method in Mode 35, the fifth frequency band and the sixth frequency band belong to a third frequency interval. Mode 37: According to the method in Mode 36, each of the first frequency interval, the second frequency interval, and the third frequency interval is one of the frequency interval of the high-frequency band HB, the frequency interval of the intermediate-frequency band MB, or the frequency interval of the low-frequency band LB, respectively. Any two of the first frequency interval, the second frequency interval, and the third frequency interval are different. Mode 38: In accordance with the method in Mode 31, 32 or 37, the frequency range of the high frequency band HB includes frequencies from 2.3 GHz to 2.7 GHz; the frequency range of the intermediate frequency band MB includes frequencies from 1.7 GHz to 2.3 GHz; and the frequency range of the low frequency band LB includes frequencies below 1000 MHz. Mode 39: According to the method in any of Modes 29 to 38, the first radio frequency signal and the second radio frequency signal are of different standards. Mode 40: According to the method in any of Modes 29 to 38, the first radio frequency signal is a 5G radio frequency signal, and the second radio frequency signal is a 4G radio frequency signal. Mode 41: According to the method in any of Modes 29 to 38, the first radio frequency signal and the second radio frequency signal are of the same standard, but from different carriers. Mode 42: According to the system in any of Modes 29 to 41, the first radio frequency signal and the second radio frequency signal correspond to different SIM cards. Mode 43: According to the method in Mode 42, the first radio frequency signal and the second radio frequency signal are from the same carrier. Mode 44: According to the method in any of Modes 29 to 43, the first radio frequency signal and the second radio frequency signal correspond to different services. Mode 45: In accordance with the method in Mode 44, the service includes a voice call service or a data service. Mode 46: In accordance with the method of any of Modes 29 to 45, performing power amplification on a first radio frequency signal by means of a first power amplifier includes: to perform, by means of a third power amplifier, power amplification in the first radio frequency signal when a frequency of the first radio frequency signal belongs to a fourth frequency interval, and to emit a first radio frequency signal to the frequency band selection circuit, and to perform, by means of the first power amplifier, power amplification in the first radio frequency signal when the frequency of the first radio frequency signal belongs to the first frequency interval, the second frequency interval or a third frequency interval, and to emit a first amplified radio frequency signal to the frequency band selection circuit; route, by means of the frequency band selection circuit, the first radio frequency signal to a fourth front-end circuit when the frequency of the first radio frequency signal belongs to the fourth frequency interval; Perform, by means of the fourth circuit at the front end, filtering in the first amplified radio frequency signal to obtain a fourth transmission signal, or use the first amplified radio frequency signal as a fourth transmission signal; and transmit, by means of the antenna module, the fourth transmission signal. Mode 47: In accordance with the method in Mode 46, the fourth frequency interval includes a 5G high-frequency band. Mode 48: In accordance with the method in Mode 47, the frequency range of the 5G high frequency band includes frequencies from 2.7 GHz to 7.2 GHz. Mode 49: In accordance with the method of any of Modes 29 to 48, transmit, using the antenna module, the fourth transmission signal which includes: emit, by means of an antenna selection circuit, the fourth transmission signal to one or more of the first antennas and emit the first transmission signal to one or more of the second antennas N-r+1 when the frequency of the first radio frequency signal belongs to the 5G high frequency band and the frequency of the second radio frequency signal belongs to the HB frequency range. The first antenna supports the 5G high-frequency band, and the second antenna supports the HB frequency range. Mode 50: A terminal device, including a processor, a plurality of antennas, and the wireless communications system in accordance with any of Modes 1 to 28. The wireless communications system is separately coupled with the processor and the plurality of antennas, and the wireless communications system receives the first radio frequency signal and the second radio frequency signal from the processor. Mode 51: A processor is provided. The processor is configured to control a wireless communications system to execute the method in accordance with any of Modes 29 through 49. Mode 52: A chip is provided. The chip includes a processor and memory. The memory is configured to store a computer instruction, and the processor is configured to invoke and execute the computer instruction stored in the memory, thereby controlling a wireless communications system to execute the method in accordance with any of Modes 29 through 49. Mode 53: A computer-readable storage medium is provided. The computer-readable storage medium stores a computer instruction. When the computer instruction is executed on a computer, the computer is enabled to execute the method according to any of Modes 29 to 49. Mode 54: A computer program product is provided, which includes a computer program or instruction. When the computer program or instruction is executed on a computer, the method is implemented according to any of Modes 29 through 49.

Claims

1. A wireless communication system, characterized in that it comprises: a first power amplifier, a second power amplifier, a first switch, a second switch, a first filter circuit, a second filter circuit, and an antenna module, wherein the first power amplifier is configured to perform power amplification on a first sub-radio frequency signal and to transmit a first amplified radio frequency signal to the first switch; the second power amplifier is configured to perform power amplification on a second sub-radio frequency signal and to transmit a second amplified sub-radio frequency signal to the first switch;The first switch is configured to output the first amplified sub-radio frequency signal through the first switch to a first output signal; the first output signal is transmitted to the first filter circuit, and the first sub-radio frequency signal is in the first frequency band; the first switch is configured to output the second amplified sub-radio frequency signal through the first switch to a second output signal; the second output signal is transmitted to the first filter circuit, and the second sub-radio frequency signal is in the second frequency band; the first filter circuit is configured to perform filtering of at least one of the first output signal and the second output signal, to obtain a first transmission signal; and the antenna module is configured to transmit the first transmitted signal;The first power amplifier is configured to perform power amplification on a third sub-radio frequency signal and output a third amplified radio frequency signal to the second switch; the second power amplifier is configured to perform power amplification on a fourth sub-radio frequency signal and output a fourth amplified sub-radio frequency signal to the second switch; the second switch is configured to output the amplified third sub-radio frequency signal through the second switch to a third output signal; the third output signal is transmitted to the second filter circuit, and the third sub-radio frequency signal is in the third frequency band;The second switch is configured to output the fourth amplified sub-radio frequency signal through the second switch to a fourth output signal; the fourth output signal is transmitted to the second filter circuit, and the fourth sub-radio frequency signal is in the fourth frequency band; the second filter circuit is configured to perform filtering of at least one of the third output signal and the fourth output signal, to obtain a second transmission signal; and the antenna module is configured to transmit the second transmitted signal; frfrfrenn / eznz / E / YiAi the frequency of the first frequency band is different from the frequency of the third frequency band, and the frequency of the second frequency band is different from the frequency of the fourth frequency band.

2. The system according to claim 1, the wireless communication system is characterized in that it further comprises: a third power amplifier; the third power amplifier is configured to perform power amplification on a fifth sub-radio frequency signal and emit a third transmission signal, and the antenna module is configured to transmit the third transmission signal.

3. The system according to claim 1, the wireless communication system is characterized in that it further comprises: a third switch; the antenna module comprises a first sub-antenna and a second sub-antenna; the antenna module is configured to transmit the first transmitted signal, further comprising: the first transmitted signal is transmitted by the first sub-antenna or the second sub-antenna after passing through the third switch, wherein two output ends of the third switch are connected respectively to the first sub-antenna and the second sub-antenna.

4. The system according to claim 3, characterized in that the antenna module is configured to transmit the second transmitted signal, further comprising: the second transmitted signal is transmitted by the first sub-antenna or the second sub-antenna after passing through the third switch.

5. The system according to claim 2, the wireless communication system is characterized in that it further comprises: a fourth switch; the antenna module comprises a third sub-antenna; the antenna module is configured to transmit the third transmit signal, further comprising: the third transmit signal is transmitted by the third sub-antenna after passing through the fourth switch, wherein at least one output end of the fourth switch is connected to the third sub-antenna.

6. The system according to claim 1, characterized in that the first switch is a switch comprising at least two input ports and at least one output port, and the second switch is a switch comprising at least two input ports and at least one output port.

7. The system according to claim 1, characterized in that the first frequency band is a 5G frequency band, the second frequency band is a 4G frequency band; the third frequency band is a 5G frequency band and the fourth frequency band is a 4G frequency band. frfrfrenn / cznz / E / YiAi 8. The system according to claim 7, characterized in that the 5G frequency band and the 4G frequency band belong to a first frequency range; and the first frequency range includes at least one frequency range of a high frequency band HB, one frequency range of an intermediate frequency band MB, or one frequency range of a low frequency band LB.

9. The system according to claim 7, characterized in that the 5G frequency band includes a frequency band below 7.2 GHz, and the 4G frequency band includes a frequency band below 3 GHz.

10. The system according to claim 7, characterized in that the 5G frequency band and the 4G frequency band belong to a first frequency range; and the first frequency range includes at least one of a frequency band from 2.3GHz to 2.7GHz, a frequency band from 1.7GHz to 2.3GHz and a frequency band below 1000MHz.

11. The system according to claim 2, characterized in that the first power amplifier, the second power amplifier, and the third power amplifier are independent devices, or devices integrated into one or more integrated circuits.

12. A terminal device, including a processor and the wireless communication system according to claim 1, characterized in that the wireless communication system is connected to the processor, and the wireless communication system receives the first sub-radio frequency signal, the second sub-radio frequency signal, and the third sub-radio frequency signal from the processor, and transmits them after processing.

13. A wireless communication system, characterized in that it comprises: a first power amplifier, a second power amplifier, a frequency band selection circuit, a first front-end circuit, and an antenna module, wherein the first power amplifier and the second power amplifier are separately coupled to the frequency band selection circuit, and the first front-end circuit is separately coupled to the frequency band selection circuit and the antenna module;The first power amplifier is configured to perform power amplification on a first radio frequency signal and emit a first amplified radio frequency signal to the frequency band selection circuit, and the second power amplifier is configured to perform power amplification on a second radio frequency signal, and emit a second amplified radio frequency signal to the frequency band selection circuit;The frequency band selection circuit is configured to: route the first amplified radio frequency signal to the first front-end circuit when the first radio frequency signal converges with a first frequency band, and route the second amplified radio frequency signal to the first front-end circuit when the second radio frequency signal converges with a second frequency band, wherein the first front-end circuit supports both the first and second frequency bands; the first front-end circuit is configured to perform filtering and / or combining at least one of the first amplified radio frequency signal or the second amplified radio frequency signal to obtain a first transmit signal; and the antenna module is configured to transmit the first transmit signal.

14. The system according to claim 13, characterized in that the frequency band selection circuit includes signal ends of n first subfrequency bands, the signal ends of the n first subfrequency bands are separately coupled to the first front-end circuit, and n is a positive integer; and the frequency band selection circuit is configured so that: when the first radio frequency signal converges with the first frequency band and a first subfrequency band of the n first subfrequency bands, it emits the amplified first radio frequency signal to the first front-end of the circuit through one signal end of the first subfrequency band;and when the second radio frequency signal converges with the second frequency band and a first subfrequency band of the first n subfrequency bands, emit the second amplified radio frequency signal to the first circuit at the front end through the signal end of the first subfrequency band, where the first n subfrequency bands belong to the first frequency interval.; 15. The system according to claim 14 further includes a second front-end circuit, characterized in that the frequency band selection circuit is further configured to: route the first amplified radio frequency signal to the second front-end circuit when the first radio frequency signal converges with a third frequency band, and route the second amplified radio frequency signal to the second front-end circuit when the second radio frequency signal converges with a fourth frequency band, wherein the second front-end circuit supports the third frequency band and the fourth frequency band;The second circuit at the front end is configured to perform processing on at least one of the first amplified radio frequency signal or the second amplified radio frequency signal, to obtain a second transmission signal, wherein the processing includes filtering and / or combination; and the antenna module is further configured to transmit the second transmission signal.

16. The system according to claim 15, characterized in that the frequency band selection circuit further includes signal ends of m second sub-frequency bands, the signal ends of the m second sub-frequency bands being separately coupled to the second front-end circuit, and m being a positive integer; the frequency band selection circuit is further configured to: when the first radio frequency signal converges with the third frequency band and a second sub-frequency band of the m second sub-frequency bands, emit the amplified first radio frequency signal to the second front-end of the circuit through one end of the signal of the second sub-frequency band;and when the second radio frequency signal converges with the fourth frequency band and a second sub-frequency band of the m second sub-frequency bands, emit the amplified second radio frequency signal to the second circuit at the front end through the signal end of the second sub-frequency band, where the m second sub-frequency bands belong to the second frequency interval.; 17. The system according to claim 16, characterized in that the system further includes a third front-end circuit; the frequency band selection circuit is further configured to: route the first amplified radio frequency signal to the third front-end circuit when the first radio frequency signal converges with a fifth frequency band, and route the second amplified radio frequency signal to the third front-end circuit when the second radio frequency signal converges with a sixth frequency band, wherein the third front-end circuit supports both the fifth and sixth frequency bands; the third front-end circuit is configured to perform filtering and / or combining at least one of the first amplified radio frequency signal or the second amplified radio frequency signal to obtain a third transmission signal;and frfrfrenn / eznz / E / YiAi the antenna module is also configured to transmit the third transmission signal.; 18. The system according to claim 17, characterized in that the fifth frequency band and the sixth frequency band belong to a third frequency interval, each of the first frequency interval, the second frequency interval and the third frequency interval being one of the frequency interval of the high frequency band HB, the frequency interval of the intermediate frequency band MB or the frequency interval of the low frequency band LB, respectively and any two of the first frequency interval, the second frequency interval and the third frequency interval are different.

19. The system according to claim 17, characterized in that the frequency band selection circuit includes signal ends of k third sub-frequency bands, the signal ends of the k third sub-frequency bands are separately coupled to the third front-end circuit, and k is a positive integer; and the frequency band selection circuit is further configured to: when the first radio frequency signal converges with the fifth frequency band and a third sub-frequency band of the k third sub-frequency bands, emit the first amplified radio frequency signal to the third front-end circuit through one end of the signal of the third sub-frequency band;and when the second radio frequency signal converges with the sixth frequency band and a third sub-frequency band of the k third sub-frequency bands, emit the second amplified radio frequency signal to the third front circuit through the signal end of the third sub-frequency band, where the k third sub-frequency bands belong to the third frequency interval.; 20. The system according to claim 17, characterized in that it further includes an antenna selection circuit, wherein an input end of the antenna selection circuit is separately coupled to an output end of the first front-end circuit, an output end of the front-end circuit and an output end of the third front-end circuit, an output end of the antenna selection circuit is coupled to the antenna module, and the antenna selection circuit is configured to transmit the first transmission signal to the first r antennas, transmit the second transmission signal to one or more of the second N-r+1 antennas, and transmit the third transmission signal to one or more of the second N-r+1 antennas.

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