Radio frequency front-end module and electronic device

Abstract

The present application relates to the technical field of radio frequency circuits. Provided are a radio frequency front-end module and an electronic device. The radio frequency front-end module comprises: a first antenna switch, a first filter assembly, a second filter assembly, a first power amplifier, a first low noise amplifier and a second low noise amplifier. The first filter assembly is used for transmitting signals in a first frequency band, and the second filter assembly is used for transmitting signals in a second frequency band. The first antenna switch is coupled to a first antenna, and the first antenna is used for transmitting transmission signals in the first frequency band and receiving reception signals in the first frequency band. In a first state, the first antenna switch is in a dual-on state, and can support low-band + low-band combination scenarios. In the low-band + low-band scenarios, the module can simplify circuits, reduce costs, and facilitate module miniaturization.

Description

RF front-end modules and electronic devices Technical Field

[0001] This application relates to the field of radio frequency circuit technology, specifically to a radio frequency front-end module and electronic device. Background Technology

[0002] Fifth-generation wireless systems (5G) have higher transmission efficiency and are therefore widely used.

[0003] With the application of 5G frequency bands and the use of multiple input multiple output (MIMO) technology, the number of antennas on terminal devices is increasing. Low-frequency antennas tend to be quite large. However, the size of terminal devices is limited, making it difficult to meet the space requirements for multiple low-frequency antennas. Facing the diverse needs of terminal devices across multiple frequency bands and standards in various scenarios, the compatibility requirements for RF front-end modules are also becoming increasingly stringent.

[0004] Summary of the Invention

[0005] This application provides a radio frequency (RF) front-end module, an RF front-end module control method, an electronic device, a computer-readable storage medium, and a computer program product, which can improve the performance of the RF front-end module and reduce costs.

[0006] In a first aspect, a radio frequency (RF) front-end module is provided for use in an electronic device. The electronic device includes a first antenna, and the RF front-end module includes: a first antenna switch, a first filter component, a second filter component, a first power amplifier, a first low-noise amplifier, and a second low-noise amplifier. The first filter component is used to transmit signals in a first frequency band, and the second filter component is used to transmit signals in a second frequency band. The first antenna switch is coupled to the first antenna. The first antenna is used to transmit a transmitted signal in the first frequency band and to receive a received signal in the first frequency band. In a first state, the first antenna is also used to receive a received signal in the second frequency band. The transmitted signal in the first frequency band is transmitted to the first antenna sequentially through the first power amplifier, the first filter component, and the first antenna switch. The received signal in the first frequency band is received sequentially through the first antenna, the first antenna switch, the first filter component, and the first low-noise amplifier. The received signal in the second frequency band is received sequentially through the first antenna, the first antenna switch, the second filter component, and the second low-noise amplifier.

[0007] The receiving frequencies of the signals in the first and second frequency bands mentioned above may or may not overlap. The first filtering component can be a duplexer for the first frequency band, and the second filtering component can be a duplexer for the second frequency band.

[0008] In the first state, the transmitted signal of the first frequency band, the received signal of the first frequency band, and the received signal of the second frequency band can be transmitted simultaneously.

[0009] This RF front-end module simultaneously connects the first and second filter components via a first antenna switch, enabling simultaneous transmission of signals across two frequency bands without the need for additional trippers or other components. Frequency band configuration is flexible and simple. While meeting specifications, it does not increase cost, avoids layout difficulties caused by adding trippers or other components, and prevents excessive cascading components that would complicate the circuit structure and increase insertion loss. It simplifies the circuit structure and RF routing, improving RF conduction performance.

[0010] It should be noted that the improved radio frequency conduction performance includes increased receiver sensitivity and reduced overall power consumption while ensuring sufficient transmit power.

[0011] In some possible embodiments, the electronic device further includes a second antenna, and the radio frequency front-end module further includes: a first switch, a second switch, a third switch, and a fourth switch; in a first state, a first frequency band transmission signal is transmitted to the first antenna sequentially through a first power amplifier, a first switch, a first filter component, and a first antenna switch; a first frequency band reception signal is received sequentially through the first antenna, a first antenna switch, a first filter component, a second switch, a first low-noise amplifier, and a fourth switch; and a second frequency band reception signal is received sequentially through the first antenna, a first antenna switch, a second filter component, a third switch, a second low-noise amplifier, and a fourth switch.

[0012] This RF front-end module eliminates the need for a larger number of low-frequency antennas in compact electronic devices. Using only three low-frequency antennas, it can simultaneously support the transmission and reception of two low-frequency bands, ensuring a relatively simple antenna layout while maintaining antenna performance. Furthermore, this RF front-end module avoids the need for additional trippers and switches for the dual low-frequency bands, enabling the coexistence of two low-frequency bands while ensuring both RF conduction performance and antenna performance, thus broadening its applicability.

[0013] In some possible embodiments, the first port, the second port, and the third port of the first switch are all turned on; the first port of the first switch is coupled to the first antenna; the second port of the first switch is coupled to the common port of the first filter component; and the third port of the first switch is coupled to the common port of the second filter component.

[0014] When the first antenna switch is turned on, the first port (common port), the second port, and the third port of the first switch are all connected, meaning they are in a double-on state. This allows for the simultaneous transmission of signals from two frequency bands, meeting specifications without increasing costs. It not only facilitates layout and wiring but also promotes module miniaturization.

[0015] In some possible embodiments, the electronic device further includes a second antenna and a third antenna. The radio frequency front-end module further includes a second antenna switch, a third filter component, a fourth filter component, a second power amplifier, a third low-noise amplifier, a fourth low-noise amplifier, a fifth switch, and a sixth switch. The third filter component is used to transmit signals of a first frequency band, and the fourth filter component is used to transmit signals of a second frequency band. The second antenna switch is coupled to the second antenna. The second antenna is used to receive received signals of the first frequency band. The third antenna is used to transmit transmitted signals of the second frequency band and receive received signals of the second frequency band. In a first state, the received signals of the first frequency band are received sequentially through the second antenna, the second antenna switch, the third filter component, the fifth switch, the third low-noise amplifier, and the sixth switch. The transmitted signals of the second frequency band are transmitted sequentially through the second power amplifier and the fourth filter component to the third antenna. The received signals of the second frequency band are received sequentially through the third antenna, the fourth filter component, and the fourth low-noise amplifier.

[0016] This RF front-end module simultaneously connects the paths of the first and second filter components via a first antenna switch, enabling simultaneous transmission of transmit and receive signals across two frequency bands. Supporting 2T4R (Transmit and Receive), it eliminates the need for additional trippers or other components in scenarios supporting combined CA (Carrier Array) and / or ENDC (End-Concurrent Array) configurations of two low-frequency bands. Frequency band configuration is flexible and simple. While meeting specifications, it does not increase cost, avoids layout difficulties caused by adding trippers or other components, and prevents excessive cascading components that complicate the circuit structure and increase insertion loss. This simplifies the circuit structure and RF routing, improving RF conduction performance.

[0017] In some possible embodiments, the RF front-end module further includes: a third antenna switch, a fifth filter component, a seventh switch, an eighth switch, and a ninth switch; the third antenna switch is coupled to the third antenna, the fourth filter component, and the fifth filter component, respectively; the fourth filter component is also coupled to the seventh switch and the eighth switch, respectively; the fifth filter component is also coupled to the seventh switch and the eighth switch, respectively; the seventh switch is also coupled to the output port of the second power amplifier; the eighth switch is also coupled to the input port of the fourth low-noise amplifier, and the output port of the fourth low-noise amplifier is also coupled to the ninth switch; in the second state, the first frequency band transmission signal is transmitted to the first antenna sequentially through the first power amplifier, the first switch, the first filter component, and the first antenna switch; the first frequency band reception signal is received sequentially through the first antenna, the first antenna switch, the first filter component, the second switch, the first low-noise amplifier, and the fourth switch; and the second frequency band reception signal is received sequentially through the first antenna, the first antenna switch, the second filter component, the third switch, the second low-noise amplifier, and the fourth switch.

[0018] In some possible embodiments, in the second state, the received signal of the first frequency band is received sequentially through the second antenna, the second antenna switch, the third filter component, the fifth switch, the third low-noise amplifier, and the sixth switch; the transmitted signal of the second frequency band is transmitted to the third antenna sequentially through the second power amplifier, the seventh switch, the fourth filter component, and the third antenna; and the received signal of the second frequency band is received sequentially through the third antenna, the third antenna switch, the fourth filter component, the eighth switch, the fourth low-noise amplifier, and the ninth switch.

[0019] By setting the third antenna switch, the fifth filter component, the seventh switch, the eighth switch, and the ninth switch, the RF front-end module can support different types of CA or ENDC scenarios with dual low-frequency band combinations, making the specifications more comprehensive, the application scenarios richer, and the frequency band configuration more flexible.

[0020] In some possible embodiments, the receiving frequency bands of the first frequency band and the receiving frequency bands of the second frequency band do not overlap at all.

[0021] When the receiving frequencies of the first and second frequency bands do not overlap at all, these two frequency bands do not share a receiving path. The received signals of the first and second frequency bands are transmitted through their respective corresponding filtering components and input to different receiving ports of the RF chip. For example, the first frequency band is B8 (N8) and the second frequency band is N20 (B20), the first frequency band is B5 (N5) and the second frequency band is N20 (B20), the first frequency band is B8 (N8) and the second frequency band is N28 (B28), and the first frequency band is B5 (N5) and the second frequency band is N20 (B20).

[0022] In some possible embodiments, the receiving frequency band of the third frequency band signal at least partially overlaps with the receiving frequency band of the second frequency band signal; in the third state, the transmitted signal of the first frequency band is transmitted to the first antenna in sequence through the first power amplifier, the first switch, the first filter component, and the first antenna switch; the received signal of the first frequency band is received in sequence through the first antenna, the first antenna switch, the first filter component, the second switch, the first low noise amplifier, and the fourth switch; the received signal of the third frequency band is received in sequence through the first antenna, the first antenna switch, the second filter component, the third switch, the second low noise amplifier, and the fourth switch.

[0023] In some possible embodiments, in the third state, the received signal of the first frequency band is received sequentially through the second antenna, the second antenna switch, the third filter component, the fifth switch, the third low-noise amplifier, and the sixth switch; the transmitted signal of the third frequency band is transmitted to the third antenna sequentially through the second power amplifier, the seventh switch, the fifth filter component, and the third antenna switch; and the received signal of the third frequency band is received sequentially through the third antenna, the third antenna switch, the fifth filter component, the eighth switch, the fourth low-noise amplifier, and the ninth switch.

[0024] When the receiving frequency bands of the first and second frequency bands do not overlap at all, and the receiving frequency bands of the third frequency band and the second frequency band overlap at least partially, the received signals of the second and third frequency bands can reuse the same radio frequency path.

[0025] In this implementation, the first antenna switch can support a dual-on state of a first frequency band and a second frequency band. If the second and third frequency bands have partially or completely overlapping receiving frequencies, for example, if the first frequency band is B8 (N8), the second frequency band is N20 (B20), and the third frequency band is N28 (B28), the second and third frequency bands can share the same receiving path. For example, N20 (B20) can share the path corresponding to the receiving port of the duplexer of N28 (B28). Therefore, when the discrete port corresponding to the first frequency band (e.g., port 5) and the discrete port corresponding to the third frequency band (e.g., port 7) of the first antenna switch are both simultaneously turned on with the common port (e.g., port 1), it can support CA / ENDC scenarios with combinations of 8+20 and 8+28.

[0026] In other words, when the first antenna switch supports the simultaneous conduction of two paths, it can achieve two combinations of dual low-frequency bands: first band + second band (8+20) and first band + third band (8+28). Compared to the implementation method where each combination of dual low-frequency bands requires the two discrete ports of the first antenna switch to be connected to the common port respectively, this method simplifies the function of the first antenna switch, reduces its cost, and thus reduces the complexity of the RF front-end module, while ensuring support for more frequency band combinations.

[0027] In some possible embodiments, the receiving frequency bands of the first frequency band signal and the receiving frequency bands of the second frequency band signal at least partially overlap, the first filter component and the second filter component are the same filter component, the second switch and the third switch are the same switch, and the first low noise amplifier and the second low noise amplifier are the same low noise amplifier.

[0028] When the receiving frequency bands of the first frequency band and the second frequency band at least partially overlap, for example, the first frequency band is B28 (N28) and the second frequency band is N20 (B20), the received signals of the first and second frequency bands can reuse the paths corresponding to the receiving ports of the first filter component. Therefore, the received signals of the first and second frequency bands can reuse the first filter component, the second switch, and the first low-noise amplifier.

[0029] Optionally, the first and second filtering components can be different filtering components, the second and third switches can be the same switch, and the first and second low-noise amplifiers can be the same low-noise amplifier. For example, if the first frequency band is B20 (N20) and the second frequency band is N28 (B28), then the received signals of the first and second frequency bands can reuse the second filtering component, the third switch, and the second low-noise amplifier.

[0030] This RF front-end module can support the transmission status of different channels under different frequency band combinations, making the frequency band and channel configuration flexible and applicable to a wide range of scenarios.

[0031] In some possible embodiments, the electronic device further includes a tenth switch and an eleventh switch, wherein the fourth switch and the sixth switch each include at least a double-pole double-throw switch; one output port of the fourth switch and one discrete port of the ninth switch are respectively coupled to two discrete ports of the tenth switch; one output port of the sixth switch and another discrete port of the ninth switch are respectively coupled to two discrete ports of the eleventh switch.

[0032] When the fourth switch (i.e., the first multiplexer switch) and the sixth switch (i.e., the second multiplexer switch) are double-pole double-throw switches, the receiving path is transmitted to the RF chip through the switching of the tenth and eleventh switches. Optionally, the tenth and eleventh switches can be set separately from the RF front-end module, that is, the path switching is achieved by external switches outside the RF front-end module.

[0033] In some possible embodiments, the receiving frequency bands of the first frequency band and the receiving frequency bands of the second frequency band do not overlap at all; in the second state, the received signal of the second frequency band is received sequentially through the first antenna, the first antenna switch, the second filter component, the third switch, the second low noise amplifier, the fourth switch, and the tenth switch; the received signal of the second frequency band is received sequentially through the third antenna, the third antenna switch, the fourth filter component, the eighth switch, the fourth low noise amplifier, the ninth switch, and the eleventh switch.

[0034] By externally placing the tenth and eleventh switches outside the RF front-end module, the circuit flexibility can be improved without replacing the RF front-end module, while ensuring that the path for receiving signals can be conducted. The switches can be set and the type of switches can be selected as needed, making it suitable for a wide range of applications.

[0035] In some possible embodiments, the receiving frequency bands of the first frequency band and the receiving frequency bands of the second frequency band at least partially overlap; in the fourth state, a second antenna is used to receive the received signals of the first and second frequency bands; a third antenna is used to transmit the transmitted signal of the second frequency band and receive the received signal of the second frequency band; the transmitted signal of the first frequency band is transmitted to the first antenna in sequence through a first power amplifier, a first switch, a first filter component, and a first antenna switch; the received signal of the first frequency band is received in sequence through the first antenna, the first antenna switch, the second filter component, the third switch, the second low-noise amplifier, and the fourth switch.

[0036] In some possible embodiments, in the fourth state, the received signal of the first frequency band and the received signal of the second frequency band are received sequentially through the second antenna, the second antenna switch, the third filter component, the fifth switch, the third low noise amplifier and the sixth switch; the transmitted signal of the second frequency band is transmitted to the third antenna sequentially through the second power amplifier, the seventh switch, the fourth filter component and the third antenna switch; and the received signal of the second frequency band is received sequentially through the third antenna, the third antenna switch, the fourth filter component, the fourth low noise amplifier, the eighth switch, the ninth switch and the tenth switch.

[0037] When the receiving frequency bands of the first frequency band and the second frequency band overlap at least partially, the received signals of the two frequency bands can reuse the same receiving path. For example, a B20 received signal and an N28 received signal have the same path flow, i.e., they reuse the same receiving path. Furthermore, the B20+N28 received signal input from the DRX_LB1 of the RF chip needs to be split within the RF chip to separate the B20 and N28 received signals before further processing. Because the B20+N28 received signal input from the DRX_LB1 of the RF chip is split into B20 and N28 received signals, it occupies the DRX_LB1 and DRX_LB2 ports within the RF chip. Therefore, other received signals cannot be input and parsed through the DRX_LB2 port of the RF chip; instead, the PRX_LB1 and PRX_LB2 ports of the RF chip can be selected for input. Therefore, the RF front-end module can receive the received signal of the second frequency band in sequence through the third antenna, the third antenna switch, the fourth filter component, the fourth low-noise amplifier, the eighth switch, the ninth switch and the tenth switch, ensuring that the signal can be demodulated correctly.

[0038] In some possible embodiments, the radio frequency front-end module includes a tenth switch and an eleventh switch.

[0039] Optionally, the tenth and eleventh switches can be integrated with the RF front-end module, that is, the switches can be built into the RF front-end module to realize path switching, which improves the integration of the module and facilitates layout and wiring.

[0040] In some possible embodiments, the fourth switch includes at least a three-pole double-throw switch, with the first input port and the second input port of the fourth switch respectively coupled to the output ports of the first low-noise amplifier and the second low-noise amplifier; the third input port of the fourth switch is conductive to the first output port and the second output port of the fourth switch, and the first output port of the fourth switch is coupled to a discrete port of the ninth switch.

[0041] When the fourth switch is a triple-pole double-throw switch, the switching of the receiving path can be achieved without adding an additional tenth switch. Therefore, there is no additional cost or difficulty in layout and wiring, which is more conducive to module miniaturization.

[0042] In some possible embodiments, the receiving frequency band of the second frequency band signal and the receiving frequency band of the first frequency band signal at least partially overlap; in the fifth state, a second antenna is used to receive the received signal of the first frequency band and the received signal of the second frequency band; a third antenna is used to transmit the transmitted signal of the second frequency band and receive the received signal of the second frequency band; the transmitted signal of the first frequency band is transmitted to the first antenna in sequence through a first power amplifier, a first switch, a first filter component, and a first antenna switch; the transmitted signal of the first frequency band is transmitted to the first antenna in sequence through the first antenna, the first antenna switch, the second filter component, the third switch, the second low-noise amplifier, the first input port of the fourth switch, and the first output port of the fourth switch. The system receives the received signal of the first frequency band; it sequentially receives the received signal of the first frequency band and the received signal of the second frequency band through the second antenna, the second antenna switch, the third filter component, the fifth switch, the third low-noise amplifier, and the first input port and the first output port of the sixth switch; it sequentially transmits the transmitted signal of the second frequency band to the third antenna through the second power amplifier, the seventh switch, the fourth filter component, and the third antenna switch; and it sequentially receives the received signal of the second frequency band through the third antenna, the third antenna switch, the fourth filter component, the eighth switch, the fourth low-noise amplifier, the ninth switch, the third input port of the fourth switch, and the first output port of the fourth switch.

[0043] When the fourth switch is a triple-pole double-throw switch, the switching of the receiving path can be achieved without adding an additional tenth switch. Therefore, no additional cost or layout and wiring difficulty is required. This enables the CA / ENDC scenario under dual low-frequency combination, further simplifying the circuit structure and RF routing, and improving RF conduction performance.

[0044] In some possible embodiments, the sixth switch includes at least a three-pole double-throw switch, with the first input port and the second input port of the sixth switch respectively coupled to the output ports of the first low-noise amplifier and the second low-noise amplifier; the third input port of the sixth switch is conductive to the first output port and the second output port of the sixth switch, and the first output port of the sixth switch is coupled to a discrete port of the ninth switch.

[0045] When the sixth switch is a triple-pole double-throw switch, the switching of the receiving path can be achieved without adding an additional eleventh switch. Therefore, there is no need to increase the cost or the difficulty of layout and wiring, which is more conducive to module miniaturization.

[0046] In some possible embodiments, the receiving frequency band of the second frequency band signal and the receiving frequency band of the first frequency band signal do not overlap; in the sixth state, the first antenna is also used to receive the received signal of the second frequency band; the second antenna is used to receive the received signal of the first frequency band; the third antenna is used to transmit the transmitted signal of the second frequency band and receive the received signal of the second frequency band; the transmitted signal of the first frequency band is transmitted to the first antenna in sequence through the first power amplifier, the first switch, the first filter component, and the first antenna switch; the received signal of the first frequency band is received in sequence through the first antenna, the first antenna switch, the second filter component, the second switch, the first low-noise amplifier, and the fourth switch; the received signal of the first frequency band is received in sequence through the first antenna and the first antenna switch. The system receives the received signal of the second frequency band through a second filter component, a third switch, a second low-noise amplifier, and a fourth switch; it receives the received signal of the first frequency band through the first input port and the first output port of the sixth switch via the second antenna, the second antenna switch, the third filter component, the fifth switch, the third low-noise amplifier, and the sixth switch in sequence; it transmits the transmitted signal of the second frequency band to the third antenna through the second power amplifier, the seventh switch, the fourth filter component, and the third antenna switch in sequence; and it receives the received signal of the second frequency band through the third antenna, the third antenna switch, the fourth filter component, the eighth switch, the fourth low-noise amplifier, the ninth switch, the third input port of the sixth switch, and the first output port of the sixth switch in sequence.

[0047] When the sixth switch is a triple-pole double-throw switch, the switching of the receiving path can be achieved without adding an additional eleventh switch. Therefore, no additional cost or layout and wiring difficulty is required. This enables the CA / ENDC scenario under dual low-frequency combination, further simplifying the circuit structure and RF routing, and improving RF conduction performance.

[0048] In some possible embodiments, the RF front-end module further includes a fourth antenna switch, which is coupled to the first antenna switch, the second antenna switch, the first antenna, and the second antenna, respectively; the fourth antenna switch is used to switch the first antenna and the second antenna.

[0049] The fourth antenna switch can also switch between the first and second antennas by adjusting their conduction states. For example, it can couple the transmit / receive path of the first frequency band to the second antenna, and the receive path of the second frequency band to the first antenna, improving the flexibility of antenna use and making it easier to select a better-performing and more suitable antenna for different frequency bands, thereby improving communication quality.

[0050] In some possible embodiments, the RF front-end module further includes: a third power amplifier and a sixth filter component; the sixth filter component is coupled to the third power amplifier and the fourth antenna switch respectively, and the sixth filter component is used to transmit signals of the fourth frequency band; the fourth antenna switch is also used to transmit the transmit signal of the fourth frequency band to the first antenna or the second antenna, or to transmit the receive signal of the fourth frequency band received by the first antenna or the second antenna.

[0051] Optionally, the RF front-end module can also be compatible with other low-frequency transmission and / or reception paths. For example, the fourth frequency band can be a low-frequency GSM band (GSM850, GSM900), thereby improving the module's integration and facilitating the miniaturization of the entire electronic device.

[0052] Secondly, a radio frequency (RF) front-end module control method is provided, applied to the RF front-end module described in the first aspect. This method is used to control the RF front-end module to achieve any one of the states described in the first aspect.

[0053] Thirdly, a radio frequency front-end module control device is provided, including a unit composed of software and / or hardware, which is used to execute any one of the methods in the technical solutions described in the second aspect.

[0054] Fourthly, embodiments of this application provide a chip including a processor; the processor is used to read and execute a computer program stored in a memory to perform any of the methods described in the second aspect.

[0055] Optionally, the chip may also include a memory, which is connected to the processor via a circuit or wire.

[0056] Alternatively, the chip may further include a communication interface.

[0057] Optionally, the chip is a radio frequency chip (Modem).

[0058] Fifthly, an electronic device is provided, comprising: a processor, a memory, and an interface; the processor, memory, and interface cooperate with each other to enable the electronic device to perform any one of the methods described in the second aspect.

[0059] In a sixth aspect, an electronic device is provided, which includes any one of the radio frequency front-end modules described in the first aspect, or any one of the chips described in the fourth aspect.

[0060] In a seventh aspect, an electronic device is provided, which includes a first antenna and a radio frequency chip (or radio frequency integrated circuit, abbreviated as RFIC), and also includes any one of the radio frequency front-end modules in the technical solutions described in the first aspect.

[0061] Eighthly, a computer-readable storage medium is provided, wherein a computer program is stored therein, and when the computer program is executed by a processor, the processor performs any one of the methods described in the second aspect.

[0062] In a ninth aspect, a computer program product is provided, the computer program product comprising: computer program code, which, when executed on an electronic device, causes the electronic device to perform any one of the methods described in the second aspect. Attached Figure Description

[0063] Figure 1 is a schematic diagram of an example of NSA networking provided in an embodiment of this application;

[0064] Figure 2 is a schematic diagram of an example of an electronic device equipped with two low-frequency antennas according to an embodiment of this application;

[0065] Figure 3 is a schematic diagram of the structure of an example of a radio frequency front-end module with two low-frequency antennas provided in an embodiment of this application;

[0066] Figure 4 is a schematic diagram of a transceiver path in an example of a radio frequency front-end module provided in an embodiment of this application;

[0067] Figure 5 is a schematic diagram of the transceiver path in another example of a radio frequency front-end module provided in the embodiments of this application;

[0068] Figure 6 is a schematic diagram of an electronic device with four low-frequency antennas provided in an embodiment of this application;

[0069] Figure 7 is a schematic diagram of the structure of an example of a radio frequency front-end module with four low-frequency antennas provided in an embodiment of this application;

[0070] Figure 8 is a schematic diagram of the connection between an RF front-end module, an antenna, and an RF chip provided in an embodiment of this application.

[0071] Figure 9 is a schematic diagram of a transceiver path in an example of a radio frequency front-end module provided in an embodiment of this application;

[0072] Figure 10 is a schematic diagram of an electronic device with three low-frequency antennas provided in an embodiment of this application;

[0073] Figure 11 is a schematic diagram of the structure of an example of a radio frequency front-end module with three low-frequency antennas provided in an embodiment of this application;

[0074] Figure 12 is a schematic diagram of the internal structure of a two-band duplexer provided in an embodiment of this application;

[0075] Figure 13 is a schematic diagram of the transceiver path in another example of a radio frequency front-end module provided in the embodiments of this application;

[0076] Figure 14 is a schematic diagram of the transceiver path in another example of a radio frequency front-end module provided in the embodiments of this application;

[0077] Figure 15 is a schematic diagram of a portion of the receiving path in an example of an RF front-end module provided in an embodiment of this application;

[0078] Figure 16 is a schematic diagram of the transceiver path in another example of a radio frequency front-end module provided in the embodiments of this application;

[0079] Figure 17 is a schematic diagram of a portion of the receiving path in another example of a radio frequency front-end module provided in the embodiments of this application;

[0080] Figure 18 is a schematic diagram of a transceiver path in another example of a radio frequency front-end module provided in the embodiments of this application;

[0081] Figure 19 is a schematic diagram of a multiplexer circuit provided in an embodiment of this application;

[0082] Figure 20 is a schematic diagram of a transceiver path in another example of a radio frequency front-end module provided in the embodiments of this application;

[0083] Figure 21 is a schematic diagram of the transceiver path in another example of a radio frequency front-end module provided in the embodiments of this application;

[0084] Figure 22 is a schematic diagram of the transceiver path in another example of a radio frequency front-end module provided in the embodiments of this application;

[0085] Figure 23 is a schematic diagram of another example of the connection method between the radio frequency front-end module and the radio frequency chip provided in the embodiments of this application;

[0086] Figure 24 is a schematic diagram of a portion of the receiving path in another example of a radio frequency front-end module provided in the embodiments of this application;

[0087] Figure 25 is a schematic diagram of the transceiver path in another example of a radio frequency front-end module provided in the embodiments of this application;

[0088] Figure 26 is a schematic diagram of a portion of the receiving path in another example of a radio frequency front-end module provided in the embodiments of this application;

[0089] Figure 27 is a schematic diagram of the transceiver path in another example of a radio frequency front-end module provided in the embodiments of this application;

[0090] Figure 28 is a schematic diagram of the transceiver path in another example of a radio frequency front-end module provided in the embodiments of this application.

[0091] Explanation of reference numerals in the attached diagram: First antenna switch: 1101; Second antenna switch: 1120; Third antenna switch: 1143; Third antenna switch: 1175; First switch: 1109; Second switch: 1112; Third switch: 1113; Fourth switch: 1116; Sixth switch: 1130; Seventh switch: 1145; Eighth switch: 1146; Ninth switch: 1147; Tenth switch: 1150; Eleventh switch: 1151; Twelfth switch: 1111; First power amplifier: 1109; Second power amplifier: 1141; Third power amplifier: 1171; First low-noise amplifier: 1114; Second low-noise amplifier: 1115; Fourth low-noise amplifier: 1142; Fourth filter component: 1140; Fifth filter component: 1144; Sixth filter component: 1172. Detailed Implementation

[0092] The technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. In the description of the embodiments of this application, unless otherwise stated, " / " means "or," for example, A / B can mean A or B; "and / or" in this text is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Furthermore, in the description of the embodiments of this application, "multiple" refers to two or more than two.

[0093] In the following text, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature.

[0094] The radio frequency front-end module provided in this application embodiment can be applied to electronic devices such as mobile phones, tablets, wearable devices, in-vehicle devices, augmented reality (AR) / virtual reality (VR) devices, laptops, ultra-mobile personal computers (UMPCs), netbooks, and personal digital assistants (PDAs). This application embodiment does not impose any restrictions on the specific type of electronic device. Electronic device 101 can also refer to access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication equipment, user agent, or user device. Electronic devices can also be cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), handheld devices with wireless communication capabilities, computing devices, or other processing devices connected to a wireless modem, electronic devices in 5th-generation (5G) networks, or electronic devices in future evolved public land mobile networks (PLMNs), etc., and the embodiments of this application are not limited thereto.

[0095] With the advent of 5G (new radio, NR) technology, the application of 5G communication is becoming increasingly widespread. Current 5G network deployment modes include: Standalone (SA) mode and Non-Standalone (NSA) mode. NSA mode accounts for a significant proportion. NSA network deployment refers to the deployment of 5G base stations on existing 4G base stations, requiring that 4G signals (e.g., B8, B20, B28 band signals) and 5G signals (e.g., N20, N28 band signals) can work together. Some operators are using a combination of Long Term Evolution (LTE) and 5G NR dual connectivity (ENDC) for NSA networking.

[0096] Figure 1 is a schematic diagram of the architecture of a mobile communication system in an NSA networking mode. As shown in Figure 1, the electronic device 101 in this mobile communication system can simultaneously transmit and receive data with network devices of multiple standards. For example, the mobile communication system may include electronic device 101, LTE base station 102, and NR base station 103. Electronic device 101 can communicate simultaneously with both LTE base station 102 and NR base station 103. LTE base station 102 and NR base station 103 represent two different network standards.

[0097] Optionally, in an NSA scenario, the communication system may also include a core network, which can be a 4G core network. In connected mode, electronic devices can simultaneously use the radio resources of at least two different base stations (divided into master and slave stations). However, the NR base station 103 cannot directly establish a connection with the core network; it needs to connect to the core network through the LTE base station 102. In this case, the user plane and control plane of the NR base station 103 may need to be connected by the LTE base station. In another scenario, the user plane of the NR base station 103 can connect to the core network, while the control plane continues to connect to the LTE base station 102. That is, the electronic device 101 needs to communicate simultaneously with both the LTE base station 102 and the NR base station 103 to obtain information.

[0098] Alternatively, in another NSA networking possibility, the core network can be a 5G core network, the user plane and control plane of NR base station 103 are connected to the core network, the control plane of LTE base station 102 can be connected to NR base station 103, and the user plane can be connected to the core network or NR base station 103.

[0099] In addition, carrier aggregation (CA) technology is also widely used for system expansion. CA technology aggregates two or more carrier units (which can be contiguous or non-contiguous) together to form a wider frequency band, thereby supporting higher data transmission rates and greater throughput. CA can be carrier aggregation within the same frequency band or carrier aggregation across different frequency bands.

[0100] Therefore, the specifications of RF front-end modules in electronic devices also need to be adapted to NSA and CA scenarios.

[0101] To facilitate understanding of the technical solution of this application, the frequency bands involved in the RF front-end module are explained here first:

[0102] Low band (LB): generally refers to communication frequency bands with low frequencies, such as GSM850, GSM900, LTE B5, LTE B8, NR_N20 and NR_N28, which have frequencies below 1 GHz.

[0103] Mid-band (MB): Generally refers to communication frequency bands between 1.7GHz and 2.2GHz, such as LTE B1, B3, NR N1, N2, N3, etc.

[0104] High-frequency band (HB): generally refers to communication frequency bands between 2.3G and 2.7G, such as LTE B7, NR N40, NR N41 and other frequency bands.

[0105] Middle high band (MHB): The intermediate frequency band and the high frequency band can usually share some paths or antennas, and are collectively referred to as the middle high frequency band.

[0106] In some cases, there are not necessarily strict boundaries between low-frequency bands, mid-frequency bands, high-frequency bands, and mid-high-frequency bands, and there may be overlaps at the edges of the frequency range.

[0107] Currently, many antennas on terminal devices are located on the bezel. Since low-frequency band antennas are typically large, in compact terminal devices, the number of low-frequency antennas is relatively small to achieve CA and ENDC scenarios combining two low-frequency bands. Figure 2 shows a schematic diagram of the circuit and antenna distribution in a terminal device with two low-frequency antennas. As shown in Figure 2, the terminal device has a main circuit board for arranging most of the main circuit components, including but not limited to some or all of the circuit components in the RF front-end module. Some external devices (referred to as peripherals) are located near the main circuit board, such as cameras, earpieces, and lights. The terminal device also has an auxiliary circuit board for arranging a smaller number of circuit components. Some peripherals are also located near the auxiliary circuit board, such as microphones, card slots, and power / data interfaces. In addition to the mid-to-high frequency and low-frequency antennas used for cellular communication, the bezel of the terminal device also houses other antennas such as antennas for satellite communication systems and positioning systems. In this embodiment, antennas other than the low-frequency antennas used for cellular communication are collectively referred to as other functional antennas. Figure 2 shows an example of two low-frequency antennas, low-frequency antenna 1 and low-frequency antenna 2.

[0108] To support CA and ENDC scenarios using a combination of two low-frequency bands, the RF front-end module needs to support two transmit paths and four receive paths for each of these low-frequency bands, abbreviated as 2T4R. Figure 3 shows a schematic diagram of the circuit structure of an example RF front-end module. Specifically, the components in the RF front-end module can be functionally divided into an LB transmit module and an LB receive module. The LB transmit module includes both transmit and receive paths for low-frequency signals. The LB receive module can also include receive paths for low-frequency signals. It can be understood that one LB transmit module and one LB receive module can form at least one transmit path and two receive paths (1T2R). The transmit path is the path through which the transmitted signal flows, and the receive path is the path through which the received signal flows. Optionally, transmit and receive paths in different frequency bands may be partially multiplexed; transmit and receive paths in the same frequency band may also be partially multiplexed. Optionally, when the electronic device (including the terminal device mentioned above) supports communication in the MHB band, the radio frequency front-end module may also include an MHB transmitting module and an MHB receiving module, which are used together to process signals in the MHB band.

[0109] Next, based on the structure of the RF front-end module, the functions of the components involved in the RF front-end module will be introduced: As shown in Figure 3, the RF front-end module includes: antenna switch, multiplexer, filter components, power amplifier (PA), low noise amplifier (LNA) and other switches.

[0110] Antenna Switch: An antenna switch is a type of radio frequency (RF) switch, also known as an RF path selection switch. It is directly or indirectly connected to the antenna and used to switch the conduction state between different RF paths and the transmitting and receiving antennas. Antenna switches can be multi-pole multi-throw (MPLT) switches. Figure 3 shows an example of an MPLT switch (SP8T). The various switches involved in the embodiments of this application can be named and distinguished according to the number of ports. Multi-port switches can be collectively referred to as XPXT. Here, X represents the number of ports on one side of the switch. When X is 1, it can be replaced by S (single); when X is 2, it can be replaced by D (double); when X is 3 or a larger number, it can be represented by a specific number, such as 4, 5, or other natural numbers. Using X directly in the switch name indicates that the number of ports is not limited. For example, SPDT represents a single-pole double-throw (SPDT) switch, 3P3T represents a triple-pole triple-throw (TPDT) switch, DPXT represents a double-pole multi-throw (DPXT) switch, SPXT represents a single-pole multi-throw (SPXT) switch, and XPXT represents a multi-pole multi-throw (MPLT) switch.

[0111] Filtering components: These can include filters, duplexers, and / or quadplexers, used to filter out unwanted frequency bands and spurious signals, and to select the desired radio frequency signals. Filters are two-port components capable of selecting signals within a frequency range. When a signal's frequency falls within the filter's passband, the filter can select that signal; that is, signals with frequencies within the filter's passband can pass through the filter with low loss. When a signal's frequency falls within the filter's stopband (i.e., outside the passband), the filter can suppress signals at that frequency; that is, signals with frequencies outside the filter's passband will be significantly attenuated when passing through the filter.

[0112] A duplexer is a three-port device. The common terminal of a duplexer can select signals in at least two frequency bands; one discrete terminal can select signals in the first frequency band of the two frequency bands and suppress signals in the second frequency band of the two frequency bands; while the other discrete terminal can select signals in the second frequency band and suppress signals in the first frequency band.

[0113] Tripler: A tripler is a four-port component. The common terminal of a tripler can select signals from at least three frequency bands; each discrete terminal can select a signal from one corresponding frequency band of the three frequency bands and suppress signals from the other two frequency bands.

[0114] Quadruple transducer: A quadruple transducer is a five-port component. The common terminal of a quadruple transducer can select signals from at least four frequency bands; each discrete terminal can select a signal from one corresponding frequency band of the four frequency bands and suppress signals from the other three frequency bands.

[0115] PA: PA is used to amplify the power of the input signal and can be applied to the transmission path.

[0116] LNA: An LNA is a power amplifier with a low noise figure. While amplifying signal power, an LNA can also suppress noise and can be used in small signal receiving paths.

[0117] Other switches may also be included in the transmission path of the LB transmitter module, such as gating switches that connect different filter components and PA.

[0118] Other switches may also be included in the receiving path of the LB transmitter module, such as a gating switch connecting the filter components and the LNA, and a multiplexer (MUX) connecting the LNA and the RF chip. The MUX can also be called a multiplexing switch.

[0119] In the RF front-end module, a single LB PA can be used to amplify the power of transmitted signals from multiple LB bands. The amplified LB band transmitted signals can be switched to the corresponding filter components for filtering, and then transmitted to the corresponding antenna for radiation via antenna switching. Similarly, the same LNA can be used in the RF front-end module to perform low-noise amplification of received signals from multiple different LB bands with similar frequencies. The amplified received signals are then switched by a MUX and enter the corresponding port of the RF chip. Optionally, the RF front-end module can also use two LNAs to perform low-noise amplification of received signals at different frequencies, and the amplified received signals are then switched by a MUX and enter the corresponding port of the RF chip.

[0120] It should be noted that, in the embodiments of this application, the signal emitted by the radio frequency chip is called the transmitted signal, and the signal received by the radio frequency chip is called the received signal.

[0121] Based on the antenna scheme of the two low-frequency antennas shown in Figure 2, the structure of the corresponding RF front-end module can be seen in Figure 3. The LB transmit module in the RF front-end module may include: antenna switches (antenna switch 301 and antenna switch 302), duplexers 303, 304, 305, 306, 308, and 309, filter 310, switch 311, PA 312, and PA 314. In the LB transmit module shown in Figure 3, when the electronic device transmits a low-frequency signal (signal in the 3G, 4G, or 5G band), the low-frequency signal is emitted from the output port corresponding to the low-frequency signal of the RF chip, and then enters the low-frequency amplifier (LB PA) 312 from the input terminal (LB_IN1) of the LB transmit module for amplification. Subsequently, the low-frequency signal is switched by switch 311, output from the port of switch 311, and enters the corresponding filtering component (e.g., one of duplexers 303, 304, 305, 306, 307, 308, or 309) for filtering. The filtered low-frequency signal is then switched by antenna switches (antenna switches 301 and 302 are used as examples in Figure 3) and transmitted to the corresponding antenna port (e.g., ANT1 or ANT2), and transmitted through the antenna (low-frequency antenna 1 or low-frequency antenna 2) connected to the antenna port.

[0122] Optionally, the RF front-end module may further include a coupler 341 between the antenna switch 302 and the antenna (low-frequency antenna 1 or low-frequency antenna 2). The coupler 341 can be positioned between the antenna switch 302 and the low-frequency antenna. The coupler 341 can couple the transmitted signal on the transmit path and input the coupled detection signal to the power detection module (not shown in the figure) for power detection, thereby detecting the fault state of the transmit path. Optionally, the RF front-end module may further include a switch 340 for switching the detection signal of the LB transmit module with the detection signals of other modules (e.g., the detection signal input from CPL_IN), and outputting it from the detection output port (CPL_OUT1), thereby enabling multiple detection signals to share the same power detection module. Optionally, the RF front-end module may further include an antenna switch 301 between the antenna switch 302 (or coupler 341) and the low-frequency antenna (low-frequency antenna 1 or low-frequency antenna 2), for switching the antenna of the transmit path, and also for switching the received signal received by the antenna to the corresponding LB receive module. Optionally, the antenna switches 301 and 302 described above can be replaced with an antenna switch, which can be in the form of DP8T or DP10T, to replace the ports of antenna switches 301 and 302 shown in Figure 3 and achieve the same switching state. Further details will not be provided here.

[0123] Optionally, the RF front-end module may also include a PA314 corresponding to the GSM band and a filter component 310. When the electronic device transmits a 2G low-frequency signal (denoted as GSM_LB signal), the GSM_LB transmission signal is emitted from the output port corresponding to the GSM_LB transmission signal of the RF chip, and then enters the PA314 for amplification from the input port (GSM_LB_IN) of the LB transmission module. The amplified GSM_LB transmission signal is filtered by the filter 310 and transmitted to the corresponding antenna (low-frequency antenna 1 or low-frequency antenna 2) for transmission after being switched by the antenna switch 301. Optionally, a coupler 342 may also be provided between the antenna switch 301 and the filter 310 to couple the transmission signal on the GSM_LB transmission path, and input the coupled detection signal to the power detection module (not shown in the figure) through the detection output port (e.g., CPL_OUT2) for power detection to detect the fault status of the transmission path of the GSM_LB band. Optionally, a switch 360 can be provided between coupler 342 and filter 310 to switch the GSM_LB transmit signal with signals from other low-frequency bands; details will not be elaborated here. It should be noted that one end of each filter component in Figure 3 (e.g., the common end of the duplexer) is connected to multiple ports (discrete ports) of antenna switch 302, and the other end of each filter component (e.g., the discrete end of the duplexer) is also connected to multiple discrete ports of switches 311, 315, and 316, respectively. It should also be noted that for frequency division (FDD) bands, the transmit and receive paths can be separated using a duplexer to separate the transmit and receive signals.

[0124] Referring again to Figure 3, the LB transmitter module also includes: switch 315, switch 316, LNA 317, LNA 318, and MUX 319. When the electronic device receives a low-frequency band signal through low-frequency antenna 1 or low-frequency antenna 2, the received signal can be switched to the corresponding filtering component (e.g., one of duplexers 303, 304, 305, 306, 307, 308, or 309) for filtering by switching antenna switch 302 and antenna switch 301. For the low-frequency band of frequency division (FDD), the filtered received signal enters the corresponding LNA (e.g., LNA 317 or LNA 318) for low-noise amplification by switching the switch (switch 315 or switch 316) connected to the filtering component, and then enters the RF chip for processing through the corresponding port (e.g., one of LB_OUT1 or LB_OUT2) via switching MUX 319.

[0125] Alternatively, the switches 315 and 316 described above can be replaced by a switch with more ports, or a larger number of switches with fewer ports, as long as the requirements for path switching can be met.

[0126] The RF front-end module shown in Figure 3 also includes a Load Balancer (LB) receiver module. Specifically, the LB receiver module includes a receiving path that can be used to process the received signal from the antenna in a MIMO scenario. The antenna switch can switch the received signal from the antenna to the LB receiver module, and the signal enters the RF chip through the receiving path in the LB receiver module.

[0127] Specifically, the LB receiver module includes a switch, a filter assembly, an LNA, and a MUX. As shown in Figure 3, the LB receiver module includes: switch 320, filter 321, filter 322, filter 323, filter 324, filter 325, switch 326, switch 327, LNA 328, LNA 329, and MUX 330. Antenna switch 302 switches the low-frequency band received signal from low-frequency antenna 1 or low-frequency antenna 2 to switch 320 of the LB receiver module. Through switching of switch 320, the signal enters the corresponding filter assembly (e.g., one of filter 321, filter 322, filter 323, filter 324, or filter 325) for filtering. The filtered received signal is then switched by a switch (e.g., switch 326 or switch 327) to enter the corresponding LNA (e.g., LNA 328 or LNA 329) for low-noise amplification. Then, the received signal is switched by the MUX330 and enters the RF chip for processing through the corresponding port (LNA_OUT3 or LNA_OUT4).

[0128] Alternatively, the switches 326 and 327 can be replaced by a switch with more ports, such as a DP6T or DP8T, as long as the requirements for path switching can be met.

[0129] It should be noted that Figure 3 above specifically illustrates the connection relationships between the ports of each RF front-end module. In the following text, to simplify circuit representation and avoid excessive wiring that would obstruct circuit diagram observation, the connection relationships between the ports of the filter components and switches can be determined by defining the network names of each port. Specifically, ports (or pins) with the same network name are interconnected. That is, any two ports labeled with the same network port name are interconnected. Subsequent figures will no longer use solid lines to illustrate the connection relationships of each duplexer and switch. For example, in Figure 3, the port labeled "B71_RX_1" on filter 309 and the port labeled "B71_RX_1" on switch 315 share the same network name "B71_RX_1," therefore these two ports are interconnected via RF traces. Similarly, the port labeled "B13_RX_1" on duplexer 308 and the port labeled "B13_RX_1" on filter 308 share the same network name "B13_RX_1," therefore these two ports are interconnected via RF traces. The undefined ports in Figure 3 are not necessarily floating ports. The network names corresponding to each floating port can be assigned and defined according to the frequency bands supported by the electronic device, which will not be elaborated here.

[0130] Both CA and ENDC scenarios require the coexistence of two low-frequency bands. Table 1 shows the frequency band combinations for different operators or regions in CA scenarios. The frequency band combinations in Table 1 are merely examples and are not intended to limit the frequency band combinations used in the modules provided in this application embodiment.

[0131] Table 1

[0132] In Table 1, the numbers in the frequency band combinations represent the corresponding frequency band numbers. Frequency band numbers that do not contain the letters N and B before them indicate that they support both 4G LTE and 5G NR. For example, in CA_20A_28A, 20A means that it supports both the B20 frequency band for 4G LTE and the N20 frequency band for 5G NR; 28A means that it supports both the B28A frequency band for 4G LTE and the N28A frequency band for 5G NR.

[0133] In this context, 28A represents a portion of the frequency range within band number 28, encompassing both 4G and 5G frequencies: uplink 703-733MHz and downlink 758-788MHz. Band number 28 also includes 28B, with an uplink range of 733-763MHz and a downlink range of 773-803MHz. The full range of the receiving frequency band for band number 28 is 758-821MHz. Except for band number 28, the letter A following other band numbers indicates single-carrier aggregation. For example, CA_20A_28A indicates support for single-carrier aggregation in B20+B28A and N20+N28A formats.

[0134] Table 2 shows the frequency band combinations for different operators or regions in the ENDC scenario.

[0135] Table 2

[0136] In Table 2, DC is an abbreviation for ENDC. In Table 2, the numbers in the frequency band combinations also represent the corresponding frequency band numbers. Frequency band numbers that do not contain the letter N or B indicate that they support both 4G LTE and 5G NR. For detailed explanations, please refer to the relevant descriptions in Table 1, which will not be repeated here.

[0137] The previous section introduced the circuit structure of some embodiments of the RF front-end module. Next, we will explain the specific applications and working status of the RF front-end module in conjunction with specific usage scenarios.

[0138] When two low-frequency antennas are used on an electronic device, the RF front-end module needs to support the 2T4R specification requirements of both low-frequency bands to meet the CA and ENDC requirements of both bands. Taking an 8+20 band combination as an example, the RF front-end module also includes a tripper 353. The passband frequency ranges corresponding to the three discrete ports of the tripper 353 are: the transmit band (TX) of N8 (B8), the receive band (RX) of N8 (B8), and the receive band (RX) of N20 (B20). The RF front-end module also includes a tripper 356. The passband frequency ranges corresponding to the three discrete ports of the tripper 356 are: the transmit band (TX) of N20 (B20), the receive band (RX) of N20 (B20), and the receive band (RX) of N8 (B8).

[0139] When the RF front-end module specifications include dual low-frequency band combinations of 20+28, 8+20, and 5+28, each band combination requires a corresponding tripper or duplexer (the 20+28 band combination requires a duplexer, such as tripper 357; other band combinations require trippers, such as trippers 358 and 359) to meet the 2T4R specification requirement of simultaneously supporting the other two low-frequency bands. Additionally, when the specifications require support for multiple dual low-frequency band combinations, the RF front-end module also includes switches 350 and 355 for switching between duplexers or tripplexers for different dual low-frequency band combinations. Optionally, when multiple dual low-frequency band combinations need to be supported, the multiple filtering components corresponding to different band combinations can also be switched using switches. For example, in Figure 3, switch 355 is used to switch duplexers 357, 356, 358, and 359, and switch 350 is used to switch 351, 352, and 353. Correspondingly, the RF front-end module also includes switches 363 and 346, which are used to couple the ports corresponding to the receiving frequency bands of duplexers 357, 356, 358, and 359 to switches 326 or 327, thereby enabling multiplexing of LNA 328 or LNA 329.

[0140] The following section, with reference to the accompanying drawings, provides a detailed description of the transceiver path for the 8+20 dual low-frequency band combination. For ease of description, the B8+N20 band combination in the ENDC scenario is used as an example. It should be noted that Figure 4 and subsequent figures show the same circuit structure as Figure 3. To highlight the transceiver path, Figure 4 and subsequent figures only show the circuit parts related to the transceiver path; other parts not involved are not shown. However, this does not mean that Figure 4 and subsequent figures only include the shown parts, and Figure 4 and subsequent figures do not limit the circuit structure.

[0141] Specifically, Figure 4 shows one transmit path (B8TX path) for B8 and one transmit path (N20TX path) for N20 in the RF front-end module shown in Figure 3, as indicated by the thick solid lines in Figure 4. The two receive paths for B8 and the two receive paths for N20 are shown by the thick solid lines in Figure 5. It should be noted that switches 326 and 327 may also include more discrete ports for connecting to the discrete ports corresponding to the receiving frequency bands of each tripper, to multiplex LNA328 and LNA329; these will not be elaborated upon here. Switches 326 and 327 shown in Figure 5 are merely examples and do not represent the only number of ports shown. As shown in Figures 4 and 5, low-frequency antenna 1 can simultaneously serve as the transmit antenna for B8, the main receive antenna for B8, and the diversity receive antenna for N20; low-frequency antenna 2 can connect to a PA (e.g., PA362) outside the RF front-end module, simultaneously serving as the transmit antenna for N20, the main receive antenna for N20, and the diversity receive antenna for B8.

[0142] Optionally, low-frequency antenna 1 and low-frequency antenna 2 can be interchanged. Low-frequency antenna 1 can be used as the transmitting antenna of N20, and low-frequency antenna 2 can be used as the transmitting antenna of B8. This can be achieved by adaptively switching the path of antenna switch 301.

[0143] The circuits shown in Figures 3 to 5 have high performance requirements for the tripod, making its implementation difficult. Furthermore, as shown in Figure 3, using a tripod to accommodate dual low frequencies requires the simultaneous addition of an external power amplifier (PA) and various switches and other components. This results in a large number of additional components, increasing cost and the difficulty of layout within a limited space. Moreover, the introduction of multiple additional components creates a multi-stage cascaded circuit, increasing circuit complexity and raising insertion loss in the transmit / receive paths, thus affecting transmission and reception performance.

[0144] Figure 6 shows a schematic diagram of the circuitry and antenna distribution in an electronic device with four low-frequency antennas. As shown in Figure 6, the electronic device includes a main circuit board and auxiliary circuit boards. The arrangement of the main and auxiliary circuit boards can be found in the relevant description in Figure 2. Figure 6 uses four low-frequency antennas—low-frequency antenna 1, low-frequency antenna 2, low-frequency antenna 3, and low-frequency antenna 4—as an example.

[0145] Figure 7 illustrates the circuit structure of the RF front-end module when four low-frequency antennas are installed on an electronic device. Optionally, the RF front-end module in Figure 7 is illustrated by including two RF transceiver modules (RF transceiver module 1 and RF transceiver module 2) and two RF receiver modules (RF receiver module 1 and RF receiver module 2). These two RF transceiver modules and two RF receiver modules can be installed separately, integrated, or partially integrated. RF transceiver module 1 includes: a power amplifier, a duplexer, a filter, a low-noise amplifier, a switch, and control circuitry; RF receiver module 1 includes: a filter, a low-noise amplifier, a switch, and control circuitry. RF transceiver module 2 includes: a power amplifier, a duplexer, a filter, a low-noise amplifier, a switch, and control circuitry; RF receiver module 2 includes: a filter, a low-noise amplifier, a switch, and control circuitry. Optionally, the antenna switch can be integrated with the RF transceiver module or installed separately. The connection method between the RF front-end module and the RF chip shown in Figure 7 can be seen in Figure 8a. Figure 8a shows the connection between the RF front-end module and the RF chip, but the specific structure of the RF front-end module is no longer shown.

[0146] Optionally, the low-frequency antennas 3 and 4 in Figure 7 can be switched by adding an antenna switch. To illustrate the connection relationship between the antennas and the modules in the RF front-end module, Figure 8b shows a schematic diagram of the connection between the two RF transceiver modules, the two RF receiver modules, and the four low-frequency antennas in the RF front-end module.

[0147] The circuit structure of the RF front-end module shown in Figures a and b of Figure 8 can be found in Figure 7 and related descriptions, and will not be repeated here.

[0148] Taking the B8A_N20A scenario in the ENDC context as an example, the thick solid lines in Figure 9 represent the transmit and receive paths for the low-frequency combinations B8 and N20 in the RF front-end module shown in Figure 7. In Figure 9, the transmit path is denoted as the TX path, the main receive path as the PRX path, and the diversity receive path as the DRX path. The common portion of the transmit path and the main receive path in the same frequency band is denoted as the TRX path.

[0149] As shown in Figure 9, low-frequency antenna 1 can simultaneously serve as the transmitting antenna and the main receiving antenna of B8, while low-frequency antenna 2 can serve as the diversity receiving antenna of B8. Low-frequency antenna 3 can simultaneously serve as the transmitting antenna and the main receiving antenna of N20, while low-frequency antenna 4 can serve as the diversity receiving antenna of N20. Optionally, low-frequency antenna 1 and low-frequency antenna 2 can be grouped together, and low-frequency antenna 3 and low-frequency antenna 4 can be grouped together. These two groups of antennas are interchangeable, requiring only adaptive adjustments to the connected RF paths for compatibility.

[0150] Alternatively, for other dual low-frequency combinations, such as LTE_CA combination: CA_8A-20A, NR_CA combination: CA_N8A-N20A and ENDC DC_B20A-N8A in the four-antenna scheme, the corresponding RF front-end module path can be found in the path diagram of B8A_N20A in the ENDC scenario, which will not be elaborated here.

[0151] However, the RF front-end module shown in Figure 7 requires four low-frequency antennas on the electronic device. Due to the large size of low-frequency antennas, a four-antenna configuration would take up considerable space on the electronic device. Furthermore, designing a large number of low-frequency antennas on an already compact electronic device would reduce their efficiency due to layout constraints. Compared to the two-antenna configuration shown in Figure 3, adding two more low-frequency antennas would also worsen the efficiency of other functional antennas.

[0152] Based on this, this application provides a radio frequency front-end module implemented with an antenna scheme based on three low-frequency antennas. Compared with the four low-frequency antenna scheme described above, it can reduce the number of antennas on electronic devices without adding too many additional components. It can achieve compatibility with the original frequency band specifications with a smaller number of antennas, ensuring antenna performance while saving costs and ensuring the transmission and reception performance of the radio frequency transceiver module.

[0153] Figure 10 shows a schematic diagram of the circuit board and antenna distribution in an electronic device with three low-frequency antennas. As shown in Figure 10, the electronic device has a main circuit board and an auxiliary circuit board. The arrangement of the main and auxiliary circuit boards can be found in the relevant description in Figure 2. Figure 10 illustrates an example with three low-frequency antennas: a first antenna (low-frequency antenna 1), a second antenna (low-frequency antenna 2), and a third antenna (low-frequency antenna 3).

[0154] Based on the antenna scheme shown in Figure 10, the circuit structure of the corresponding RF front-end module can be seen in Figure 11. Figure 11 includes a first transceiver module, a first receiving module, and a second transceiver module. The first transceiver module is used to carry out the functions of transmitting in the first frequency band, receiving the main signal in the first frequency band, and receiving the diversity signal in the second frequency band. Specifically, the first transceiver module includes: a first antenna switch, a first filter assembly, a first switch, a first power amplifier, a second switch, a third switch, a first low-noise amplifier, a second low-noise amplifier, and a first multiplexer switch (i.e., a fourth switch).

[0155] Optionally, the first transceiver module, the first receiving module, and the second transceiver module can be integrated or set separately; this application embodiment does not limit this.

[0156] The first antenna switch (e.g., switch 1101) is used for coupling with the first antenna and the first filter assembly combination. The first filter assembly combination includes one or more filter assemblies (e.g., duplexers 1102, 1103, 1104, 1105, 1106, 1107, and 1108). The first filter assembly combination includes a first filter assembly (e.g., duplexer 1103) corresponding to a first frequency band and a second filter assembly (e.g., duplexer 1106) corresponding to a second frequency band. One port of each filter assembly (the common port of the duplexer) is coupled to the first antenna switch, and the other ports of each filter assembly (the discrete ports of the duplexer) are also coupled to the first switch (e.g., switch 1109), the second switch (e.g., switch 1112), and the third switch (e.g., switch 1113), respectively. The common port of the first switch (e.g., port 1) is also coupled to the output port of the first power amplifier (e.g., PA1110), and the input port of the first power amplifier is coupled to the first transmit port of the RF chip (e.g., TX_LB1).

[0157] Figure 11 illustrates an example where the first antenna switch is an SP8T switch, the second switch is an SPDT switch, and the third switch is an SP6T switch. The common port (port 1) of the first antenna switch is directly or indirectly coupled to the first antenna. Multiple discrete ports of the first antenna switch (e.g., some or all of ports 2 to 9) are coupled to the filter components corresponding to each frequency band. When the filter components are multi-port devices such as duplexers or quadplexers, the multiple discrete ports of the first antenna switch are coupled one-to-one to the common port of each filter component. Each discrete port of the first switch (e.g., some or all of ports 2 to 9) is coupled one-to-one to the discrete ports corresponding to the transmission frequency bands of multiple filter components. Similarly, each discrete port of the second switch (e.g., some or all of ports 2 to 3 of switch 1112, and some or all of ports 2 to 7 of switch 1115) is coupled one-to-one to the discrete ports corresponding to the receiving frequency bands of one or more filter components.

[0158] Alternatively, the second and third switches mentioned above can be replaced by a DP8T or other switches with more ports, as long as the corresponding channel state switching needs can be achieved.

[0159] The common port of the third switch (e.g., port 1) is coupled to the input port of the first low-noise amplifier (e.g., LNA1114), and the output port of the first low-noise amplifier is coupled to one port on the first side of the first multiplexer (e.g., MUX1116). The common port of the third switch is coupled to the input port of the second low-noise amplifier (e.g., LNA1115), and the output port of the second low-noise amplifier is coupled to the other port on the first side of the first multiplexer. The ports on the second side of the first multiplexer can be directly or indirectly coupled to the receiver ports of the RF chip (e.g., PRX_LB1 and PRX_LB2). It should be noted that any port on the first side of the first multiplexer can be connected to any port on the second side.

[0160] The first receiving module is used to carry out diversity reception function for the first frequency band. Specifically, the first receiving module includes: a second antenna switch, a second filter assembly, a fifth switch, a third low-noise amplifier, a fourth low-noise amplifier, and a second multiplexing switch (i.e., a sixth switch). Optionally, the first receiving module also includes other switches 1, such as switch 1127.

[0161] The second antenna switch (switch 1120) is used to couple with the second antenna and the second filter assembly combination, respectively. The second filter assembly combination includes one or more filter components (e.g., one or more of filters 1121, 1122, 1123, 1124, and 1125). Figure 11 illustrates an example with the second antenna switch being SP6T and the fifth switch (switch 1126) being SPDT or SP4T. One port of each filter component is coupled one-to-one with a discrete port of the second antenna switch (e.g., some or all of ports 2 to 7), and the other port of each filter component is also coupled with the fifth switch and other switches 1, respectively. The second filter assembly combination includes a third filter component (e.g., filter 1122) corresponding to the receiving frequency band of the first frequency band. The common port (port 1) of the fifth switch is coupled to the input port of the third low-noise amplifier (e.g., LNA 1128), and the output port of the third low-noise amplifier is coupled to one port on the first side of the second multiplexer switch (e.g., MUX 1130). The common port (port 1) of other switch 1 is coupled to the input port of another low-noise amplifier (e.g., LNA1129), and the output port of the other low-noise amplifier is coupled to another port on the first side of the second multiplexer. The port on the second side of the second multiplexer can be directly or indirectly coupled to the receiver port of the RF chip (e.g., DRX_LB1).

[0162] The second transceiver module is used to carry out the transmission of the second frequency band and the main reception function of the second frequency band. Specifically, the second transceiver module includes a third filter assembly, a second power amplifier, and a fourth low-noise amplifier. The third filter assembly includes a fourth filter component (e.g., a duplexer 1140). The common port of this fourth filter component can be directly or indirectly coupled to the third antenna. The discrete port of the fourth filter component corresponding to the transmission frequency is coupled to the output port of the second power amplifier (e.g., PA1141), and the input port of the second power amplifier is directly or indirectly coupled to the second transmission port (e.g., TX_LB2) of the RF chip. The discrete port of the fourth filter component corresponding to the reception frequency is coupled to the input port of the fourth low-noise amplifier (e.g., LNA1142), and the output port of the fourth low-noise amplifier is directly or indirectly coupled to the reception port (e.g., DRX_LB2) of the RF chip.

[0163] It should be noted that the coupling between the components or ports described in the embodiments of this application can be a direct electrical connection between the two via RF traces. The width of the RF traces connecting the two and their distance from the metal ground can be adjusted according to the frequency to ensure impedance matching. Alternatively, the two can be indirectly connected, for example, through a matching circuit or other RF components. Optionally, other RF components can be couplers, filters, attenuation networks, or equivalent components. Optionally, the coupler is used for power detection of the signal on the path, the matching circuit is used for impedance matching, and the filter is used for filtering and path matching.

[0164] As shown in Figure 11 above, taking the first frequency band as B8 and the second state as N20 as an example, in state one, the transmitted signal of the first frequency band is output from the first transmit port (TX_LB1) of the RF chip, input to the first transceiver module through the first low-frequency input port (LB_IN1) of the first transceiver module, and then input to the first power amplifier through the input port of the first power amplifier for power amplification. The amplified transmitted signal of the first frequency band enters the first filter component for filtering through the discrete port corresponding to the transmitted frequency band in the first filter component. After filtering, the transmitted signal of the first frequency band is output from the common port of the first filter component and transmitted to a discrete port of the first antenna switch. After being switched by the first antenna switch, it is transmitted by the first antenna. The first filter component is the filter component corresponding to the first frequency band, used to transmit the signal of the first frequency band, for example, it can be used to select the transmitted signal and the received signal of the first frequency band. The first filter component can be, for example, a duplexer, quadplexer, or other components corresponding to the first frequency band. Figure 11 uses a duplexer as an example of the first filter component.

[0165] In the first state, the received signal of the first frequency band is received by the first antenna and then enters the first transceiver module through the first antenna port (ANT1). Specifically, the received signal of the first frequency band is input to the first antenna switch through the common port of the first antenna switch, and after being switched by the first antenna switch, it is output from the discrete port of the first antenna switch corresponding to the first frequency band and transmitted to the first filter component. The received signal of the first frequency band is input to the first filter component through the common port of the first filter component, and after being selected by the first filter component, it is output from the discrete port of the first filter component corresponding to the receiving frequency band. Then, the received signal of the first frequency band is transmitted to a discrete port of the second switch (e.g., switch 1112), and after being switched by the second switch, it is input from the common port of the second switch to the input port of the first low-noise amplifier (e.g., LNA1114) for low-noise amplification. The received signal of the first frequency band is amplified by the first low-noise amplifier, and then input to the first multiplexer (e.g., MUX1116) from one port on the first side of the first multiplexer. After being switched by the first multiplexer, it is output from one port on the second side of the first multiplexer to the receiving port (e.g., PRX_LB1) corresponding to the first frequency band of the RF chip, and then enters the RF chip for demodulation.

[0166] Optionally, when the first frequency band is B20 and the second frequency band is N8, the second switch can be switch 1113 in Figure 11, and the first low-noise amplifier can be LNA1115.

[0167] Continuing with the example of the first frequency band being B8 and the second state being N20, in state one, the received signal of the second frequency band can also be received by the first antenna, and then enter the first transceiver module through the first antenna port (ANT1). Specifically, the received signal of the second frequency band is input through the common port of the first antenna switch, and after being switched by the first antenna switch, it is output from the discrete port of the first antenna switch corresponding to the second frequency band and transmitted to the second filter component. The received signal of the second frequency band is input to the second filter component through the common port of the second filter component, and after being selected by the second filter component, it is output from the discrete port of the second filter component corresponding to the receiving frequency band. Then, the filtered received signal of the second frequency band is transmitted to a discrete port of the third switch (e.g., switch 1113), and after being switched by the third switch, it is input from the common port of the third switch to the input port of the second low-noise amplifier (e.g., LNA1115). The received signal of the first frequency band is amplified by the second low-noise amplifier, then enters the first multiplexer through the other port on the first side of the first multiplexer, and after being switched by the first multiplexer, it is output from the other port on the second side of the first multiplexer to the receiving port corresponding to the second frequency band (e.g., PRX_LB2), and then enters the RF chip for demodulation.

[0168] Optionally, when the first frequency band is B20 and the second frequency band is N8, the third switch can be switch 1112 in Figure 11, and the second low-noise amplifier can be LNA1114.

[0169] In the first state, the received signal of the first frequency band is received by the second antenna and then enters the first receiving module through the second antenna port (ANT2). Specifically, the received signal of the first frequency band is input to the second antenna switch through the common port of the second antenna switch, and after being switched by the second antenna switch, it is output from the discrete port of the second antenna switch corresponding to the first frequency band and transmitted to the corresponding third filter component (one of filter 1121, filter 1122, filter 1123, filter 1124, and filter 1125) in the second filter component assembly for filtering. After being filtered by the third filter component, the received signal of the first frequency band is output to a discrete port of the fifth switch (e.g., switch 1126), and after being switched by the fifth switch, it is input to the input port of the third low-noise amplifier (e.g., LNA1128) from the common port of the fifth switch. The received signal in the first frequency band is amplified by the third low-noise amplifier, then enters the second multiplexer through one port on the first side of the second multiplexer (e.g., MUX1130), and after being switched by the second multiplexer, it is output from one port on the second side of the second multiplexer to the receiving port of the RF chip (e.g., DRX_LB1).

[0170] Optionally, when the first frequency band is B20 and the second frequency band is N8, the fifth switch can be switch 1127 in Figure 11, and the third low-noise amplifier can be LNA1129.

[0171] Continuing with the example of the first frequency band being B8 and the second state being N20, in state one, the transmit signal of the second frequency band is output from the second transmit port (TX_LB2) of the RF chip and then input to the second transceiver module. It first passes through the input port of the second power amplifier (e.g., PA1141) for power amplification. The amplified transmit signal of the second frequency band is then output from the output port of the second power amplifier to the discrete port corresponding to the transmit frequency band of the fourth filter component (e.g., duplexer 1140) for filtering. After filtering, the transmit signal of the second frequency band is output from the common terminal of the fourth filter component and transmitted to the third antenna for transmission.

[0172] In the first state, the received signal of the second frequency band is received by the third antenna and then enters the second transceiver module through the third antenna port (e.g., ANT3). Specifically, the received signal of the second frequency band can first be input to the fourth filter component through the common port of the fourth filter component for selection, and then output from the discrete port corresponding to the receiving frequency band of the fourth filter component. Next, the received signal of the second frequency band is input to the fourth low-noise amplifier (e.g., LNA1142) through the input port of the fourth low-noise amplifier. After being amplified by the fourth low-noise amplifier, it is directly or indirectly output to the receiving port of the RF chip (e.g., DRX_LB2).

[0173] Optionally, when the first frequency band is B8 and the second frequency band is N20, the transmit and receive paths of B8 and N20 can be shown as the thick solid line in Figure 11.

[0174] In the aforementioned state, this RF front-end module can not only support the transmit path, main receiver path, and diversity receiver path of the first frequency band, but also simultaneously support the transmit path, main receiver path, and diversity receiver path of the second frequency band, that is, it supports the 2T4R specification. Based on this, the RF front-end module can support CA and ENDC scenarios in two frequency bands.

[0175] The RF front-end module shown in Figure 11 can adapt to antenna schemes with three low-frequency antennas. In the CA and ENDC scenarios, one common port of the first antenna switch can be simultaneously connected to two discrete ports, exhibiting a double-open path state. That is, the first antenna switch has two conducting paths at the same time. These two paths correspond to the first frequency band and the second frequency band, respectively. By enabling the first antenna switch to exhibit a double-open path state, this RF front-end module can achieve scenarios where two low-frequency band combinations coexist.

[0176] It should be noted that the primary receive (PRX) and diversity receive (DRX) paths, primary receive ports and diversity receive ports shown in the text and figures of this application embodiment are not used to limit whether a path or port is a primary receive or a diversity receive, but are used to distinguish two different receive paths or two different receive ports in the same frequency band.

[0177] It should be noted that in radio frequency (RF) circuits, the antenna may receive signals from more than one frequency band at the same time, or it may receive a mixture of signals from multiple frequency bands. Since the electronic device needs to receive signals from a specific frequency band at any given time, the switch on the receiving path in the RF front-end module, under the control of a control signal, can open the receiving path corresponding to the current operating frequency band, allowing the received signal of the operating frequency band to enter the port of the corresponding RF chip. During this process, the filter set in the opened receiving path can filter the received signal, i.e., select the signal of the operating frequency band and suppress other non-operating frequency band signals. Furthermore, it should be noted that whether an antenna can receive signals from a certain frequency band is reflected in whether the antenna performance is good in that frequency band. For example, if the antenna has a high gain and / or high efficiency in that frequency band, meeting the communication requirements, then the antenna can receive signals from that frequency band; if the antenna performance is poor in that frequency band, such as low gain and / or low efficiency, failing to meet the communication requirements, then the antenna cannot receive signals from that frequency band. Therefore, the signal received by the antenna in this application in a certain frequency band, before being filtered, is not actually limited to the signal of that frequency band, but refers to the mixed signal of multiple frequency bands that exist in the current working environment and include that frequency band.

[0178] Figure 12 details the path states and circuit operation principle of the first antenna switch in state one (double-on state). As shown in Figure 12, phase-shifting networks are set on both the transmit and receive paths in the duplexers of B8 and N20 to achieve path matching, so as to receive useful in-band RF signals and suppress useless out-of-band RF signals. By properly designing and adjusting the phase-shifting networks, it is possible to support the simultaneous operation of the paths corresponding to the first and second frequency bands in the double-on state of the antenna switch to support the transmit and receive signals, thereby supporting CA and ENDC scenarios in dual low-frequency bands.

[0179] This RF front-end module eliminates the need for a larger number of low-frequency antennas in compact electronic devices. Using only three low-frequency antennas, it can simultaneously support the transmission and reception of two low-frequency bands, ensuring a relatively simple antenna layout and maintaining optimal antenna performance. Furthermore, it avoids the need for additional trippers and switches for dual low-frequency bands, enabling flexible and simple frequency band configuration. While meeting specifications, it does not increase costs, avoids layout difficulties due to added components, or complicate circuitry and increase insertion loss caused by excessive cascading. This simplifies circuit structure and RF routing, improving RF conduction performance (and enhancing transceiver performance).

[0180] Optionally, the RF front-end module provided in this application embodiment can also support other combinations of dual low-frequency bands. When the RF front-end module also supports other combinations of dual low-frequency bands, it can also include filtering components and related switches or switch ports corresponding to other frequency bands. This RF front-end module simplifies the frequency band configuration solution, offers flexible frequency band configuration, and enriches application scenarios.

[0181] Figure 11 illustrates a dual low-frequency band combination with the first and second frequency bands being B8 and N20, respectively. When the first and second frequency bands are other frequency bands, the corresponding transceiver path only needs to pass through the filter component corresponding to the frequency band of the signal, and the discrete port of the switch coupled to the filter component. For example, when the first frequency band is B5 and the second frequency band is N28, the transceiver path of the first and second frequency bands can be seen as shown by the thick solid line in Figure 13; the specific signal flow will not be described in detail here.

[0182] When the RF front-end module also needs to support multiple dual low-frequency band combinations, in addition to the embodiment shown in Figure 11, filtering components and corresponding switches corresponding to the newly added frequency bands can be set. Specifically, as shown in Figure 14, the third filtering component combination also includes a fifth filtering component (e.g., duplexer 1144), and the second transceiver module also includes a third antenna switch (e.g., switch 1143), a seventh switch (e.g., switch 1145), an eighth switch (e.g., switch 1146), and a ninth switch (e.g., switch 1147). The electronic device also includes a tenth switch (e.g., switch 1150) and an eleventh switch (e.g., switch 1151). Optionally, the tenth and eleventh switches can be integrated with or separately configured with the RF front-end module.

[0183] In this configuration, the common port (port 1) of the third antenna switch is coupled to the third antenna, and the discrete terminals of the third antenna switch (e.g., ports 2 and 3) are coupled one-to-one with the common ports of the filter components in the third filter assembly. The discrete ports of the filter components in the third filter assembly are coupled one-to-one with multiple discrete ports of the seventh switch on the transmit path and the eighth switch on the receive path. When the third filter assembly includes a fourth filter component and a fifth filter component, the discrete ports of the fourth and fifth filter components corresponding to the transmit frequencies are coupled one-to-one with a discrete port (port 2) of the seventh switch and a discrete port (port 2) of the eighth switch, respectively. The discrete ports of the fourth and fifth filter components corresponding to the receive frequencies are coupled one-to-one with another discrete port (port 3) of the seventh switch and another discrete port (port 3) of the eighth switch, respectively.

[0184] The common port (port 1) of the seventh switch is coupled to the output port of the second power amplifier, and the input port of the second power amplifier is coupled to a transmit port (e.g., TX_LB2) of the RF chip. The common port (e.g., port 1) of the eighth switch is coupled to the input port of the fourth low-noise amplifier, and the output port of the fourth low-noise amplifier is coupled to the common port (e.g., port 1) of the ninth switch. The discrete port of the eighth switch is coupled one-to-one with a discrete port of the tenth and eleventh switches (e.g., port 3 of switch 1150 and port 3 of switch 1151). The other discrete port of each of the tenth and eleventh switches (e.g., port 2 of switch 1150 and port 2 of switch 1151) is coupled one-to-one with a port on the second side of the first and second multiplexed switches. The common port of each of the tenth and eleventh switches (port 1 of switch 1150 and port 1 of switch 1151) is coupled one-to-one with two receive ports (e.g., PRX_LB2 and DRX_LB2) corresponding to the second frequency band of the RF chip.

[0185] In the embodiment shown in Figure 14, when the RF front-end module also supports various other dual low-frequency band combinations, the transmit path and main receiver path of the second frequency band can be seen as shown by the second transceiver module and related thick solid lines in Figure 14. In this embodiment, the path state shown by the thick solid lines in Figure 14 is described as state two.

[0186] In state two, the specific flow of the transmitted signal through the first frequency band of the first antenna and the received signal through the first frequency band of the second antenna are described in the relevant description of state one in Figure 11.

[0187] In state two, the specific flow of the received signal in the second frequency band through the first antenna can also be seen in the partial description in Figure 11. The difference is that after the received signal in the second frequency band flows through the first multiplexer, it enters a discrete port (e.g., port 2) of the tenth switch, and is then switched by the tenth switch to a receiving port (e.g., PRX_LB2) corresponding to the second frequency band.

[0188] In state two, the second-band transmission signal is output from a transmit port (e.g., TX_LB2) of the RF chip and then input to the second transceiver module. It first passes through the input port of the second power amplifier (e.g., PA1141) for power amplification. The amplified second-band transmission signal is then output from the output port of the second power amplifier to the seventh switch (e.g., switch 1145). After switching by the seventh switch, it is output from a discrete port (port 2) of the seventh switch and passes through the discrete port corresponding to the transmission band of the fourth filter component (e.g., duplexer 1140) for filtering. After filtering, the second-band transmission signal is output from the common terminal of the fourth filter component to the third antenna switch (e.g., antenna switch 1143). After switching by the third antenna switch, it is transmitted to the third antenna for transmission.

[0189] In state two, the received signal of the second frequency band is received by the third antenna and then enters the second transceiver module through the third antenna port (ANT3). Specifically, the received signal of the second frequency band can first enter the common port of the fourth filter component through the switching of the third antenna switch, and be selected by the fourth filter component. Then, it is output from the discrete port corresponding to the receiving frequency band of the fourth filter component to a discrete port of the eighth switch (e.g., port 2). Next, the received signal of the second frequency band is input to the fifth low noise amplifier through the input port of the fourth low noise amplifier (e.g., LNA1142). After being amplified by the fourth low noise amplifier, it enters the ninth switch through the common port of the ninth switch. After being switched by the ninth switch, it is output from a discrete port of the ninth switch (e.g., port 3) to a discrete port of the eleventh switch (e.g., port 3 of switch 1151). After being switched by the eleventh switch, it is output from the common port of the eleventh switch (e.g., port 1) to a receiving port of the RF chip (e.g., DRX_LB2).

[0190] In the embodiment shown in Figure 14 above, the first antenna switch can support a dual-band setup of the first and second frequency bands. If the second and third frequency bands have partially or completely overlapping receiving bands (e.g., the first band is B8 (N8), the second band is N20 (B20), and the third band is N28 (B28), the second and third frequency bands can share the same receiving path. For example, N20 (B20) can share the path corresponding to the receiving port of the duplexer of N28 (B28). Therefore, when the discrete port corresponding to the first frequency band (e.g., port 5) and the discrete port corresponding to the third frequency band (e.g., port 7) of the first antenna switch are both simultaneously connected to a common port (e.g., port 1), it can support CA / ENDC scenarios with combinations of 8+20 and 8+28. In short, the first antenna switch, when supporting a set of two paths simultaneously connected, can achieve combinations of 8+20 and 8+28 dual low-frequency bands. Compared to the implementation method where each combination of dual low-frequency bands requires the two discrete ports of the first antenna switch to be connected to the common port respectively, this simplifies the function of the first antenna switch, reduces the cost of the first antenna switch, and thus reduces the complexity of the RF front-end module.

[0191] The RF front-end module shown in Figure 14 above has flexible application scenarios and can support the following four working scenarios.

[0192] Scenario 1: Working alone in the low-frequency band.

[0193] Specifically, in scenarios where the low-frequency band operates alone, the transmit and receive signals can be referenced in the B8 transmit / receive path shown in Figure 14. When the low-frequency band is another non-B8 (N8) band, the state of the first antenna switch can be adjusted to activate the filter component of the corresponding frequency band to select the corresponding path, and the states of other switches can be adaptively switched to activate the filter component of the corresponding frequency band on the receive path. This will not be elaborated further here.

[0194] To facilitate understanding of the differences in receiving paths under different operating scenarios, the receiving section of the RF front-end module shown in Figure 14 can be simplified to the receiving circuit shown in Figure 15. The thick solid line in Figure 15a represents the receiving path for the B8 (N8) receiving signal. The thick solid line in Figure 15b represents the receiving path for the B28 (N28) receiving signal.

[0195] Scenario 2: Low-frequency band + high-frequency band CA / ENDC scenario.

[0196] In a scenario where a low-frequency band and a high-frequency band CA / ENDC are used, the high-frequency band signal is processed by the RF front-end module corresponding to another high-frequency band, which is independent of the RF front-end module corresponding to the low-frequency band. Therefore, the status of the RF front-end module of the low-frequency band can be referred to the status in the scenario where the low-frequency band works alone, and will not be repeated here.

[0197] Working Scenario 3: Scenario with 20+28 frequency band combination (scenario where the receiving frequency bands of the first and second frequency bands overlap).

[0198] For scenarios where the receiving frequencies of the first and second frequency bands overlap, the approach differs from other frequency band combinations. Taking the 20+28 frequency band combination as an example, let's first introduce the range of these two frequency bands. The frequency range of the receiving frequency band for band 20 (B20, N20) is 791–821MHz, and the frequency range of the receiving frequency band for band 28 (B28, N28) is 758–803MHz. The frequency range of the receiving frequency band for band 28A (B28A, N28A) is 773–803MHz. It can be seen that the receiving frequency bands of band 20 and band 28A overlap. The full-band (28_FULL) of the receiving frequency band for B28 (N28) is an extended band with a frequency range of 758–821MHz.

[0199] Based on this, the thick solid line in Figure 16 represents the transceiver path of B20+N28 in the RF front-end module shown in Figure 14. The following description uses B20 as the first frequency band and N28 as the second frequency band as an example.

[0200] In state three, the B20's transmit signal is output from the first transmit port (e.g., TX_LB1) of the RF chip, inputs to the first transceiver module through the first low-frequency input port (e.g., LB_IN1), and then amplified by the first power amplifier through its input port. The amplified B20 transmit signal then enters the first filter component (here, duplexer 1105) through the discrete port corresponding to the transmit frequency band in the first filter component for filtering. After filtering, the B20 transmit signal is output from the common port of the first filter component and transmitted to a discrete port (e.g., port 6) of the first antenna switch, and then transmitted from the first antenna after being switched by the first antenna switch.

[0201] In state three, the received signal from B20, after being received by the first antenna, enters the first transceiver module through the first antenna port (ANT1). Specifically, the received signal from B20 is input to the first antenna switch through its common port (e.g., port 1), and after being switched by the first antenna switch, is output from a discrete port (e.g., port 7) of the first antenna switch and transmitted to the second filter component. The received signal from B20 is input to the second filter component (here, duplexer 1106) through its common port, and after being selected by the second filter component, is output from the discrete port of the corresponding receiving frequency band of the second filter component. Since the receiving frequency bands of B20 and N28 overlap, their received signals can be selected through the same receiving port of the duplexer. The discrete port of the second filter component corresponding to the receiving frequency band is the port (28_FULL) of B28 (N28) that can select the entire frequency band. The full-band of B28 (N28) is an extended band that supports B20. That is, the receiving band of the full-band B28 (N28) covers the receiving band of B20 (N20), thus enabling the selection of signals from the receiving band of B20. Since there is overlap between the receiving bands of B20 and N28, the full-band B28 (N28) (28_FULL) duplexer is relatively easy to implement and mass-produce. Next, the received signal from B20 is transmitted to a discrete port (e.g., port 4) of the third switch (here, switch 1113), and after being switched by the third switch, it is input from the common port of the third switch to the input port of the second low-noise amplifier (here, LNA1115) for low-noise amplification. The received signal from B20 is amplified by the second low-noise amplifier, then input to the first multiplexer (e.g., MUX1116) from one port on the first side of the first multiplexer, and after being switched by the first multiplexer, it is output from one port on the second side of the first multiplexer (here, LB_OUT1) to the main receiver port (PRX_LB1) corresponding to the first frequency band of the RF chip, and then enters the RF chip for demodulation.

[0202] In state three, the received signals from B20 and B28 can also be received by the second antenna and then enter the first receiving module through the second antenna port (ANT2). Specifically, the received signals from B20 and B28 can also be input to the second antenna switch through the common port of the second antenna switch, and after switching by the second antenna switch, output from the corresponding discrete port of B20+B28 (e.g., port 5) of the second antenna switch and transmitted to the corresponding third filter component (here, filter 1124) in the second filter component combination for filtering. The third filter component is the port (28_FULL) of B28 (N28) that can select the full frequency band. The full frequency band of B28 (N28) is an extended frequency band that can support B20, that is, the full frequency band of B28 (N28) covers the receiving frequency band of B20 (N20), thus enabling the selection of signals in the receiving frequency band of B20. The received signal from B20 is filtered by the third filter component and output to a discrete port of the fifth switch (here, switch 1127). After being switched by the fifth switch, it is input to the input port of the third low-noise amplifier (here, LNA1129) from the common port of the fifth switch. After being amplified by the third low-noise amplifier, the received signal from B20 enters the second multiplexer through a port on the first side of the second multiplexer (e.g., MUX1130). After being switched by the second multiplexer, it is output to a receiver port of the RF chip (e.g., DRX_LB1) from a port on the second side of the second multiplexer.

[0203] It should be noted that in this scenario three, the path flow of one B20 received signal and one N28 received signal is the same, that is, they reuse the same receive path. Furthermore, the B20+N28 received signals input from the DRX_LB1 of the RF chip can be split within the RF chip to separate the B20 and N28 received signals, which are then processed further.

[0204] It should be noted that, because the received signal from B20+N28 input to the RF chip's DRX_LB1 is separated into the received signal from B20 and the received signal from N28, occupying the DRX_LB1 and DRX_LB2 ports of the RF chip, other received signals cannot be input and parsed through the DRX_LB2 port of the RF chip. You can choose to input the signal through the PRX_LB1 and PRX_LB2 ports of the RF chip. See below for details, which will not be elaborated here.

[0205] In state three, the N28's transmit signal, after being output from the second transmit port (e.g., TX_LB2) of the RF chip and input to the second transceiver module, first passes through the input port of the second power amplifier (here, PA1141) for power amplification. The amplified N28 transmit signal is then output from the output port of the second power amplifier to the seventh switch (here, switch 1145). After being switched by the seventh switch, the signal is transmitted to the discrete port corresponding to the transmit frequency band of the fifth filter component (here, duplexer 1144) and filtered. After filtering, the N28 transmit signal is output from the common port of the fifth filter component and transmitted to the third antenna for transmission after being switched by the third antenna switch.

[0206] In state three, the received signal from N28, after being received by the third antenna, enters the second transceiver module through the third antenna port (ANT3). Specifically, the received signal from N28 first enters the third antenna switch through the common port of the third antenna switch, and then, after being switched by the third antenna switch, is output from a discrete port (e.g., port 3) of the third antenna switch to the fifth filter component (here, duplexer 1144) corresponding to N28. The signal is then input to the fifth filter component through the common port for selection, and then output from the discrete port corresponding to the receiving frequency band of the fifth filter component. Next, the received signal from N28 is selected by the eighth switch and input to the fifth low-noise amplifier (e.g., LNA1142) through its input port. After being amplified by the fifth low-noise amplifier, the received signal of N28 is switched by the ninth switch (switched to switch 1147) and output from a discrete port (e.g., port 2) of the ninth switch to the tenth switch (switched to switch 1150). It is also input from a discrete port (e.g., port 3) of the tenth switch and output to the receiving port (e.g., PRX_LB2) of the RF chip after being switched by the tenth switch.

[0207] Optionally, when the first frequency band is N20 and the second frequency band is B28, the transceiver path of N20 can refer to the relevant description of the transceiver path of B20, and the transceiver path of B28 can refer to the relevant description of the transceiver path of N28, which will not be repeated here.

[0208] Optionally, when the first frequency band is B28 and the second frequency band is N20, it is referred to as state four.

[0209] In state four, the B28 transmit signal is output from the first transmit port (e.g., TX_LB1) of the RF chip, inputs into the first transceiver module through the first low-frequency input port (e.g., LB_IN1) of the first transceiver module, and then flows sequentially through the first power amplifier, the first switch, the first filter component (here, the duplexer 1106), the first antenna switch, and finally to the first antenna for transmission.

[0210] In state four, the received signal from B28 is received by the first antenna and then enters the first transceiver module through the first antenna port (ANT1). Specifically, the received signal from B28 flows sequentially through the first antenna switch, the first filter component (here, duplexer 1106), the third switch (here, switch 1113), the second low-noise amplifier (here, LNA1115), the first multiplexer switch (MUX1116), and finally to the main receiver port (e.g., PRX_LB1) corresponding to the first frequency band of the RF chip, and then enters the RF chip for demodulation.

[0211] In state four, the received signals from B28 and N20 (denoted as B28+N20 received signals) are received by the second antenna and then enter the first receiving module through the second antenna port (ANT2). Specifically, the received signals from B28 and N20 flow sequentially through the second antenna switch, the third filter component (here, filter 1124), the fifth switch (here, switch 1127), the third low-noise amplifier (here, LNA1129), and the second multiplexer switch (e.g., MUX1130) to the receiving port of the RF chip (e.g., DRX_LB1).

[0212] It should be noted that the received signals from B28 and N20 input from the DRX_LB1 of the RF chip can be split within the RF chip to separate the received signals from B28 and N20, and then further processing can be performed.

[0213] In state four, the N20's transmit signal is output from the second transmit port (e.g., TX_LB2) of the RF chip and then input into the second transceiver module. It is then transmitted to the third antenna for transmission through the second power amplifier (PA1141), the seventh switch (switch 1145), the fourth filter component (duplexer 1140), and the third antenna switch.

[0214] In state four, the received signal of N20 is received by the third antenna and then enters the second transceiver module through the third antenna port (ANT3). Specifically, the received signal of N20 flows sequentially through the third antenna switch, the fourth filter component, the eighth switch, the fifth low-noise amplifier (e.g., LNA1142), the ninth switch, and the tenth switch to the receiver port of the RF chip (e.g., PRX_LB2).

[0215] Optionally, when the first frequency band is N28 and the second frequency band is B20, the transceiver path of N28 can be referred to the relevant description of the transceiver path of B28, and the transceiver path of B20 can be referred to the relevant description of the transceiver path of N20, which will not be repeated here.

[0216] The receiving section of the RF front-end module shown in Figure 16 can be simplified to the receiving circuit shown in Figure 17. The thick solid line in Figure 17 is a schematic diagram of the receiving path of the received signal of B20(N20)+N28(B28) in the receiving section.

[0217] Optionally, when the first frequency band is B20 and the second frequency band is N28, the transceiver path can also be seen as shown by the thick solid line in Figure 18. The received signal of the N28 frequency band can be received by the third antenna and then enter the second transceiver module through the third antenna port (ANT3). Specifically, the received signal of N28 flows sequentially through the third antenna switch, the fifth filter component, the eighth switch, the fourth low-noise amplifier (e.g., LNA1142), the ninth switch, and the eleventh switch to the receiving port of the RF chip (e.g., PRX_LB2). Further details are omitted here.

[0218] Scenario 4: Scenarios involving other dual low-frequency combinations besides the 20+28 band combination.

[0219] For other dual low-frequency combinations that are not part of the 20+28 band combination, please refer to the relevant descriptions in Figures 14 and 15, which will not be repeated here.

[0220] In the RF front-end modules shown in Figures 14 and 16 above, both the first and second multiplexing switches are DPDT switches. In this embodiment, the first and second multiplexing switches can also be replaced with 3PDT switches, thereby omitting the introduction of the tenth and eleventh switches, reducing the number of components and the corresponding layout and wiring area, which is beneficial for module miniaturization.

[0221] This section first introduces the differences between DPDT and 3PDT, as shown in Figure 19. Figure 19a shows the circuit configuration of a DPDT switch. It can be seen that ports 1 and 2 on the left (first side) can both be connected to ports 3 and 4 on the right (second side). Figure 19b shows the circuit configuration of a 3PDT switch. It can be seen that in the 3PDT, port 5 is added on the left. Ports 1 and 2 on the left can both be connected to ports 3 and 4 on the right, and port 5 on the left can also be connected to ports 3 and 4 on the right respectively.

[0222] It should be noted that for multiplexed switches, the ports themselves do not distinguish between input and output ports. In RF front-end modules, for ease of distinction, the port on the left is the input port for the received signal, and the port on the right is the output port for the received signal. Both input and output ports can be used for inputting and outputting signals, and do not limit the direction of signal transmission.

[0223] The 3PDT described above is applied to an RF front-end module, and the circuit structure of the RF front-end module can be seen in Figure 20. The RF front-end module shown in Figure 20 can also be applied to four operating scenarios, as detailed below:

[0224] Work Scenario 5: Scenarios where low-frequency bands operate independently.

[0225] Specifically, in the scenario where the low-frequency band operates alone, taking B8(N8) as an example, the transmission and reception paths of B8(N8) can be seen as the three paths corresponding to the thick solid lines in Figure 25: B8TX path, B8PRX path, and B8DRX path. They will not be described in detail here.

[0226] When the low-frequency band is another non-B8 (N8) band, the state of the first antenna switch can be adjusted to turn on the filter component of the corresponding frequency band to select the corresponding path, and the states of other switches can be adaptively switched to turn on the filter component of the corresponding frequency band on the receiving path. This will not be elaborated here.

[0227] Work Scenario 6: Low-frequency band + high-frequency band CA / ENDC scenario.

[0228] In a scenario where a low-frequency band and a high-frequency band CA / ENDC are used, the high-frequency band signal is processed by the RF front-end module corresponding to another high-frequency band, which is independent of the RF front-end module corresponding to the low-frequency band. Therefore, the status of the RF front-end module of the low-frequency band can be referred to the status in the scenario where the low-frequency band works alone, and will not be repeated here.

[0229] Working Scenario 7: Scenario with 20+28 frequency band combination (scenario where the receiving frequency bands of the first and second frequency bands overlap).

[0230] Optionally, the thick solid line in Figure 20 is a schematic diagram of a transceiver path in a scenario with a 20+28 frequency band combination.

[0231] Optionally, the thick solid line in Figure 21 is a schematic diagram of the transceiver path of B20+N28 in the RF front-end module shown in Figure 20. The following description uses B20 as the first frequency band and N28 as the second frequency band as an example.

[0232] As shown in Figure 21, in state five, the B20's transmit signal is output from the first transmit port (e.g., TX_LB1) of the RF chip, inputs to the first transceiver module through the first low-frequency input port (e.g., LB_IN1), and then amplified by the first power amplifier through its input port. The amplified B20 transmit signal is then filtered by the discrete port corresponding to the transmit frequency band in the first filter component (here, duplexer 1105). After filtering, the B20 transmit signal is output from the common port of the first filter component and transmitted to a discrete port (e.g., port 6) of the first antenna switch, and then transmitted from the first antenna after being switched by the first antenna switch.

[0233] In state five, the received signal from B20, after being received by the first antenna, enters the first transceiver module through the first antenna port (ANT1). Specifically, the received signal from B20 is input to the first antenna switch through its common port, and after being switched by the first antenna switch, it is output from a discrete port of the first antenna switch and transmitted to the second filter component (here, duplexer 1106). The received signal from B20 is input to the second filter component through its common port, and after being selected by the second filter component, it is output from the discrete port of the corresponding receiving frequency band of the second filter component. Since the receiving frequency bands of B20 and N28 overlap, their received signals can be output through the same duplexer's receiving port. Next, the received signal from B20 is transmitted to a discrete port of the third switch (here, switch 1113), and after being switched by the third switch, it is input from the common port of the third switch to the input port of the second low-noise amplifier (here, LNA1115) for low-noise amplification. The received signal from B20 is amplified by the second low-noise amplifier and then input to the first multiplexer (e.g., port 2) from one port on the first side of the first multiplexer (e.g., MUX1116). After being switched by the first multiplexer, the signal is output from one port on the second side of the first multiplexer (e.g., port 3) to the receiving port (e.g., PRX_LB1) of the RF chip, and then enters the RF chip for demodulation.

[0234] In state five, the received signals from B20 and N28, after being received by the second antenna, enter the first receiving module through the second antenna port (ANT2). Specifically, the received signal from B20 is input to the second antenna switch through the common port of the second antenna switch, and after being switched by the second antenna switch, it is output from the discrete port corresponding to B20 of the second antenna switch (i.e., the 20+28 port, or the 28_FULL port), and transmitted to the corresponding third filter component (here, filter 1124) in the second filter component combination for filtering. After being filtered by the third filter component, the received signal from B20 is output to a discrete port of the fourth switch (here, switch 1127), and after being switched by the fourth switch, it is input to the input port of the third low-noise amplifier (here, LNA1129) from the common port of the fourth switch. The received signal from B20 is amplified by the third low-noise amplifier, then enters the second multiplexer through a port (e.g., port 2) on the first side of the second multiplexer (MUX1130), and after being switched by the second multiplexer, is output from a port (e.g., port 3) on the second side of the second multiplexer to the receiver port (DRX_LB1) of the RF chip.

[0235] It should be noted that in scenario seven, the B20 received signal and the N28 received signal flow in the same direction, meaning they reuse the same receiving path. Furthermore, the B20+N28 received signals input from the DRX_LB1 of the RF chip can be split within the RF chip to separate the B20 and N28 received signals for subsequent processing.

[0236] In state five, the N28's transmit signal, after being output from the second transmit port (e.g., TX_LB2) of the RF chip and input to the second transceiver module, first passes through the input port of the second power amplifier (here, PA1141) for power amplification. The amplified N28 transmit signal is then output from the output port of the second power amplifier to the seventh switch (here, switch 1145). After being switched by the seventh switch, the signal is transmitted to the discrete port corresponding to the transmit frequency band of the fifth filter component (here, duplexer 1144) and filtered. After filtering, the N28 transmit signal is output from the common terminal of the fifth filter component and transmitted to the third antenna for transmission after being switched by the third antenna switch.

[0237] In state five, the received signal from N28, after being received by the third antenna, enters the second transceiver module through the third antenna port (ANT3). Specifically, the received signal from N28 first enters the third antenna switch through the common port of the third antenna switch, and then, after being switched by the third antenna switch, is output from a discrete port (e.g., port 3) of the third antenna switch to the fifth filter component (here, duplexer 1144) corresponding to N28. The signal is then input to the fifth filter component through its common port for selection, and then output from the discrete port corresponding to the receiving frequency band of the fifth filter component. Next, the received signal from N28 is selected by the eighth switch and input to the fourth low-noise amplifier (here, LNA1142) through its input port. After being amplified by the fourth low-noise amplifier, the received signal of N28 is switched by the ninth switch (switched to switch 1147 in this case) and output from a discrete port (e.g., port 2) of the ninth switch to the first multiplexer switch. It is also input from a discrete port (e.g., port 5) on the first side of the first multiplexer switch. After being switched by the first multiplexer switch, it is output from a port (e.g., port 4, which is different from port 3) on the second side of the first multiplexer switch to the receiving port (e.g., PRX_LB2) of the RF chip.

[0238] Optionally, when the first frequency band is N20 and the second frequency band is B28, the transceiver path of N20 can refer to the relevant description of the transceiver path of B20, and the transceiver path of B28 can refer to the relevant description of the transceiver path of N28, which will not be repeated here.

[0239] When the first frequency band is B28 and the second frequency band is N20, the path state is denoted as state six. The signal path of B28+N20 in state six can be seen as the thick solid line in Figure 22.

[0240] In state six, the B28's transmit signal is output from the first transmit port (e.g., TX_LB1) of the RF chip, inputs to the first transceiver module through the first low-frequency input port (e.g., LB_IN1), and then amplified by the first power amplifier through its input port. The amplified B28 transmit signal is then filtered by the discrete port corresponding to the transmit frequency band in the first filter component (here, duplexer 1106). After filtering, the B28 transmit signal is output from the common port of the first filter component and transmitted to a discrete port (e.g., port 6) of the first antenna switch, and then transmitted from the first antenna after being switched by the first antenna switch.

[0241] In state six, the received signal from B28, after being received by the first antenna, enters the first transceiver module through the first antenna port (ANT1). Specifically, the received signal from B28 is input to the first antenna switch through the common port of the first antenna switch, and after being switched by the first antenna switch, it is output from a discrete port of the first antenna switch and transmitted to the first filter component (here, duplexer 1106). After being input to the first filter component through the common port of the first filter component, the received signal from B28 is selected by the first filter component and output from the discrete port of the corresponding receiving frequency band of the first filter component. Then, the received signal from B28 is transmitted to a discrete port of the third switch (here, switch 1113), and after being switched by the third switch, it is input from the common port of the third switch to the input port of the second low-noise amplifier (here, LNA1115) for low-noise amplification. The received signal from B28 is amplified by the second low-noise amplifier, and then input to the first multiplexer (e.g., port 2) from one port on the first side of the first multiplexer (e.g., MUX1116). After being switched by the first multiplexer, it is output from one port on the second side of the first multiplexer (e.g., port 3) to the receiving port (e.g., PRX_LB1) of the RF chip, and then enters the RF chip for demodulation.

[0242] In state six, the received signals from B28 and N20, after being received by the second antenna, enter the first receiving module through the second antenna port (ANT2). Specifically, the received signals from B28 and N20 are input to the second antenna switch through the common port of the second antenna switch, and after being switched by the second antenna switch, they are output from the corresponding discrete port of B28 (i.e., the 20+28 port, or the 28_FULL port) of the second antenna switch, and transmitted to the corresponding third filter component (here, filter 1124) in the second filter component combination for filtering. The third filter component is a port (28_FULL) that can select the full-band N28, and therefore can select the signal of the B20 receiving frequency band. After being filtered by the third filter component, the received signals from B28 and B20 are output to a discrete port of the fifth switch (here, switch 1127), and after being switched by the fifth switch, they are input to the input port of the third low-noise amplifier (here, LNA1129) from the common port of the fifth switch. The received signals from B28 and B20 are amplified by the third low-noise amplifier, and then enter the second multiplexer through a port (e.g., port 2) on the first side of the second multiplexer (e.g., MUX1130). After being switched by the second multiplexer, the signals are output from a port (e.g., port 3) on the second side of the second multiplexer to the receiver port (DRX_LB1) of the RF chip.

[0243] It should be noted that in scenario seven, the received signals of B28 and N20 from state six above flow in the same direction, i.e., they reuse the same receiving path. Furthermore, the received signals of B28+N20 input from the DRX_LB1 of the RF chip can be split internally within the RF chip to separate the received signals of B28 and N20, which are then processed further. Since the received signals of B28+N20 input from the DRX_LB1 of the RF chip are split into B28 and N20 signals, occupying both DRX_LB1 and DRX_LB2 of the RF chip, other received signals cannot be input and parsed through DRX_LB2. Instead, input can be selected from ports in PRX_LB1 and PRX_LB2 of the RF chip.

[0244] In state six, the N20's transmit signal, after being output from the second transmit port (e.g., TX_LB2) of the RF chip and input to the second transceiver module, first passes through the input port of the second power amplifier (here, PA1141) for power amplification. The amplified N20 transmit signal is then output from the output port of the second power amplifier to the seventh switch (here, switch 1145). After being switched by the seventh switch, the signal is transmitted to the discrete port corresponding to the transmit frequency band of the fourth filter component (here, duplexer 1140) and filtered. After filtering, the N20 transmit signal is output from the common terminal of the fourth filter component and transmitted to the third antenna for transmission after being switched by the third antenna switch.

[0245] In state six, the received signal from N20, after being received by the third antenna, enters the second transceiver module through the third antenna port (ANT3). Specifically, the received signal from N20 first enters the third antenna switch through the common port of the third antenna switch, and then, after being switched by the third antenna switch, is output from a discrete port (e.g., port 3) of the third antenna switch to the fourth filter component (here, duplexer 1140) corresponding to N20. It is then input to the fourth filter component through the common port for selection, and then output from the discrete port corresponding to the receiving frequency band of the fourth filter component. Next, the received signal from N20 is selected by the eighth switch and input to the fourth low-noise amplifier (LNA1142) through its input port. After being amplified by the fourth low-noise amplifier, the received signal of N20 is switched by the ninth switch (switched to switch 1147 in this case) and output from a discrete port (e.g., port 2) of the ninth switch to the first multiplexer switch. It is also input from a discrete port (e.g., port 5) on the first side of the first multiplexer switch. After being switched by the first multiplexer switch, it is output from a port (e.g., port 4, which is different from port 3) on the second side of the first multiplexer switch to the receiving port (PRX_LB2) of the RF chip.

[0246] Optionally, when the first frequency band is N28 and the second frequency band is B20, the transceiver path of N28 can be referred to the relevant description of the transceiver path of B28, and the transceiver path of B20 can be referred to the relevant description of the transceiver path of N20, which will not be repeated here.

[0247] Figure 23 shows a schematic diagram of the connection between the RF front-end module and the RF chip shown in Figures 20 and 21. The relevant internal structure of the RF front-end module in Figure 23 can be found in the description of Figure 20, and is not shown in Figure 23.

[0248] The receiving section of the RF front-end module shown in Figure 22 can be simplified to the receiving circuit shown in Figure 24. In Figure 24, the thick solid line represents the receiving path of the received signal B20(N20)+N28(B28) in the receiving section. It can be seen that when the first and second frequency bands overlap, one receiving signal from the second frequency band can be selected using the first multiplexing switch.

[0249] Scenario 8: Scenarios involving dual low-frequency combinations other than the 20+28 band combination.

[0250] For scenarios involving other dual low-frequency combinations besides the 20+28 band combination, please refer to Figure 25. The thick solid line in Figure 25 shows the transmit / receive path of the dual low-frequency combination with B8+N20.

[0251] In state seven, the B8 transmit signal is output from the first transmit port (e.g., TX_LB1) of the RF chip, inputs to the first transceiver module through the first low-frequency input port (e.g., LB_IN1), and then amplified by the first power amplifier through its input port. The amplified B8 transmit signal is then filtered by the discrete port corresponding to the transmit frequency band in the first filter component (here, duplexer 1103). After filtering, the B8 transmit signal is output from the common port of the first filter component and transmitted to a discrete port (e.g., port 4) of the first antenna switch, and then transmitted from the first antenna after being switched by the first antenna switch.

[0252] In state seven, the received signal of B8, after being received by the first antenna, enters the first transceiver module through the first antenna port (ANT1). Specifically, the received signal of B8 is input to the first antenna switch through the common port of the first antenna switch, and after being switched by the first antenna switch, it is output from a discrete port of the first antenna switch and transmitted to the second filter component (here, duplexer 1103). After being input to the first filter component through the common port of the first filter component, the received signal of B8 is selected by the first filter component and output from the discrete port of the corresponding receiving frequency band of the first filter component. Then, the received signal of B8 is transmitted to a discrete port of the second switch (here, switch 1112), and after being switched by the second switch, it is input from the common port of the second switch to the input port of the first low-noise amplifier (here, LNA1114) for low-noise amplification. The received signal from B8 is amplified by the first low-noise amplifier, and then input to the first multiplexer (e.g., port 1) from one of the first sides of the first multiplexer (e.g., MUX1116). After being switched by the first multiplexer, it is output from one of the second sides of the first multiplexer (e.g., port 2) to the receiving port (e.g., PRX_LB1) of the RF chip, and then enters the RF chip for demodulation.

[0253] In state seven, the received signal of N20 can also be received by the first antenna and then enter the first transceiver module through the first antenna port (ANT1). Specifically, the received signal of N20 is input through the common port of the first antenna switch, and after being switched by the first antenna switch, it is output from the discrete port of the first antenna switch corresponding to N20 and transmitted to the second filter component (here, duplexer 1106). After the received signal of N20 is input to the second filter component through the common port, it is selected by the second filter component and output from the discrete port of the second filter component corresponding to the receiving frequency band. Then, the filtered received signal of N20 is transmitted to a discrete port of the third switch (here, switch 1113), and after being switched by the third switch, it is input from the common port of the third switch to the input port of the second low-noise amplifier (here, LNA1115). The received signal from N20 is amplified by the second low-noise amplifier, then enters the first multiplexer through a port (e.g., port 2) on the first side of the first multiplexer, and after being switched by the first multiplexer, it is output from a port (e.g., port 4) on the second side of the first multiplexer to the receiving port (PRX_LB2) of the RF chip, and then enters the RF chip for demodulation.

[0254] In state seven, the received signal from B8, after being received by the second antenna, enters the first receiving module through the second antenna port (ANT2). Specifically, the received signal from B8 is input to the second antenna switch through the common port of the second antenna switch, and after being switched by the second antenna switch, it is output from the discrete port corresponding to B8 (port 3 in this case) of the second antenna switch, and transmitted to the corresponding third filter component (filter 1122 in this case) in the second filter component assembly for filtering. After being filtered by the third filter component, the received signal from B8 is output to a discrete port of the fifth switch (switch 1126 in this case), and after being switched by the fifth switch, it is input to the input port of the third low-noise amplifier (LNA1128 in this case) from the common port of the fifth switch. The received signal from B8 is amplified by the third low-noise amplifier, then enters the second multiplexer through a port (e.g., port 1) on the first side of the second multiplexer (e.g., MUX1130), and after being switched by the second multiplexer, is output from a port (e.g., port 3) on the second side of the second multiplexer to the receiver port (DRX_LB1) of the RF chip.

[0255] In state seven, the N20's transmit signal, after being output from the second transmit port (e.g., TX_LB2) of the RF chip and input to the second transceiver module, first passes through the input port of the second power amplifier (here, PA1141) for power amplification. The amplified N20 transmit signal is then output from the output port of the second power amplifier to the seventh switch (here, switch 1145). After being switched by the seventh switch, the signal is transmitted to the discrete port corresponding to the transmit frequency band of the fourth filter component (here, duplexer 1140) and filtered. After filtering, the N20 transmit signal is output from the common terminal of the fourth filter component and transmitted to the third antenna for transmission after being switched by the third antenna switch.

[0256] In state seven, the received signal from N20, after being received by the third antenna, enters the second transceiver module through the third antenna port (ANT3). Specifically, the received signal from N20 first enters the third antenna switch through the common port of the third antenna switch, and then, after being switched by the third antenna switch, is output from a discrete port (e.g., port 2) of the third antenna switch to the fourth filter component (here, duplexer 1140) corresponding to N20. It is then input to the fourth filter component through the common port for selection, and then output from the discrete port corresponding to the receiving frequency band of the fourth filter component. Next, the received signal from N20 is selected by the eighth switch (here, switch 1146) and input to the fourth low-noise amplifier (LNA1142) through its input port. After being amplified by the fourth low-noise amplifier, the received signal of N20 is switched by the ninth switch (switched to switch 1147 in this case) and output from a discrete port (e.g., port 3) of the ninth switch to the second multiplexer. It is also input from a discrete port (e.g., port 5) on the first side of the second multiplexer. After being switched by the second multiplexer, it is output from a port (e.g., port 4, which is different from port 3) on the second side of the second multiplexer to the receiving port (DRX_LB2) of the RF chip.

[0257] Optionally, when the first frequency band is N8 and the second frequency band is B20, the transceiver path of N8 can be referred to the relevant description of the transceiver path of B8, and the transceiver path of B20 can be referred to the relevant description of the transceiver path of N20, which will not be repeated here.

[0258] The receiving section of the RF front-end module shown in Figure 25 can be simplified to the receiving circuit shown in Figure 26. The thick solid line in Figure 26 represents the receiving path of the received signal B8(N8)+N20(B20) in the receiving section. It can be seen that, when the received signals from the first and second frequency bands do not overlap, one receiving signal from the second frequency band can be selected using the second multiplexing switch.

[0259] In the RF front-end module shown in Figure 25 above, B8 can also be replaced with other frequency bands such as B5, by adaptively switching the corresponding filter components and switching ports, which will not be elaborated here. B8 here is only an example of the first frequency band and is not intended to limit the technical solution of this application.

[0260] Optionally, when the first frequency band is B8 and the second frequency band is N28, the transmit and receive path can be seen as shown by the thick solid line in Figure 27. The specific signal flow can be seen in the relevant description in Figure 25, which will not be repeated here.

[0261] Optionally, based on the above embodiments, the first transceiver module may further include a fourth antenna switch (e.g., switch 1175) and / or a twelfth switch (e.g., switch 1111). See Figure 28 for details; Figure 28 is an example based on Figure 25. As shown in Figure 28, the common port (port 1) of the twelfth switch is coupled to the input port of the first power amplifier, and the two discrete ports of the twelfth switch (e.g., port 2 and port 3) are respectively coupled to the first transmit port (TX_LB1) and the second transmit port (TX_LB2) of the RF chip. That is, by switching the twelfth switch, the transmit signal output from the second transmit port can be used as the transmit signal of the first frequency.

[0262] Optionally, between the first antenna switch and the first antenna, the RF front-end module may further include a first coupler (e.g., coupler 1176). The first coupler can couple the transmitted signal on the transmit path and input the coupled detection signal to the power detection module (not shown in the figure) for power detection, thereby detecting the fault state of the transmit path. Optionally, continuing to refer to Figure 28, the RF front-end module may further include a third power amplifier (e.g., PA1171) and a sixth filtering component (e.g., filter 1172) corresponding to the GSM band. When the electronic device transmits a 2G low-frequency signal (denoted as GSM_LB signal), the GSM_LB transmit signal is emitted from the output port corresponding to the GSM_LB transmit signal of the RF chip, and then enters the third power amplifier for amplification from an input port (GSM_LB_IN1) of the first transceiver module. The amplified GSM_LB transmit signal is filtered by the sixth filtering component and transmitted to the first antenna or the second antenna for transmission after being switched by the fourth antenna switch. Optionally, the sixth filter component and the fourth antenna switch may also be equipped with a second coupler (e.g., coupler 1174) for coupling the transmit signal on the GSM_LB transmit path, and inputting the coupled detection signal to the power detection module (not shown in the figure) through the detection output port (e.g., CPL_OUT2) for power detection to detect the fault status of the transmit path. Optionally, a switch (e.g., switch 1173) may also be provided between the second coupler and the sixth filter component for switching the GSM_LB transmit signal to signals from other low-frequency bands; details are omitted here.

[0263] Optionally, the aforementioned fourth antenna switch can also interchange the first and second antennas by adjusting their conduction states. For example, the B8TRX path can be coupled to the second antenna, and the B8DRX path can be coupled to the first antenna. The remaining transmit and receive paths can be found in the relevant descriptions above, and will not be repeated here.

[0264] Optionally, the aforementioned RF front-end module may also include a power supply circuit for supplying power from the power management chip to the active devices (e.g., PAs, LNAs, and various switches) within the RF front-end module. For example, in Figure 28, the power management chip supplies power to PA1110 through port LB_VCC1 or port LB_VCC2 of the RF front-end module. Figure 28 also includes switch 1170 for switching the electrical signals at port LB_VCC1 or port LB_VCC2. Furthermore, as shown in Figure 28, the power management chip also supplies power to PA1171 through port GSM_LB_VCC of the RF front-end module. Not all power supply circuits are shown in Figure 28; other power supply circuits in Figure 28 can be arranged according to the power supply requirements of the active devices, and will not be described in detail here.

[0265] The circuit shown in Figure 28 also includes a control circuit (not shown). The control circuit includes multiple control signal lines, which are connected to multiple components and an RF chip respectively. These control signal lines transmit control signals output by the RF chip to the corresponding components to control their operating states. For example, the control signal line connecting the switch and the RF chip transmits control signals to the switch to control its circuit switching; the control signal line connecting the PA and the RF chip transmits control signals to the PA to control its ON, OFF, and gain level switching; and the control signal line connecting the LNA and the RF chip transmits control signals to the LNA to control its ON, OFF, and gain level switching.

[0266] Optionally, the specific structure of the transceiver module and receiver module can vary depending on the frequency band combinations supported by the electronic device. For example, the number of switch ports can be adjusted according to the supported frequency bands, frequency band combinations, and the number of paths required for MIMO scenarios to meet switching requirements. Furthermore, the antenna switch can be a single-pole multi-throw (SPXT), a double-pole multi-throw (DPXT), or a multi-pole multi-throw (XPXT). Also, the type and number of filter components can be selected based on the frequency bands supported by the electronic device. Moreover, the number of LNAs and PAs and the corresponding frequency bands can also be adjusted based on the frequency bands supported by the electronic device.

[0267] The foregoing has detailed examples of the radio frequency front-end module provided in this application. It is understood that the corresponding device, in order to achieve the above functions, includes hardware structures and / or software modules corresponding to the execution of each function. Those skilled in the art should readily recognize that, based on the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein, this application can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed in hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0268] This application also provides a radio frequency front-end module control method, which is applied to the radio frequency front-end module mentioned above. This radio frequency front-end module control method is used to control the radio frequency front-end module to achieve the state in the above embodiment. The implementation principle and technical effect can be found in the relevant description of the radio frequency front-end module, and will not be repeated here.

[0269] This application also provides an electronic device including the above-described radio frequency front-end module.

[0270] This application also provides an electronic device including the aforementioned processor. The electronic device provided in this embodiment can be a terminal device used to execute the aforementioned radio frequency front-end module control method. When using integrated units, the terminal device may include a processing module, a storage module, and a communication module. The processing module can be used to control and manage the actions of the terminal device; for example, it can be used to support the terminal device in executing the steps performed by the display unit, detection unit, and processing unit. The storage module can be used to support the terminal device in executing stored program code and data. The communication module can be used to support communication between the terminal device and other devices.

[0271] The processing module can be a processor or a controller. It can implement or execute various exemplary logic blocks, modules, and circuits described in conjunction with the disclosure of this application. The processor can also be a combination of functions that implement computing capabilities, such as a combination of one or more microprocessors, a digital signal processor (DSP), and a microprocessor, etc. The storage module can be a memory. The communication module can specifically be a radio frequency circuit, a Bluetooth chip, a Wi-Fi chip, or other devices that interact with other terminal devices.

[0272] In one embodiment, when the processing module is a processor and the storage module is a memory, the terminal device involved in this embodiment can be a device with the structure shown in FIG1.

[0273] This application also provides a computer-readable storage medium storing a computer program that, when executed by a processor, causes the processor to perform the radio frequency front-end module control method described in any of the above embodiments.

[0274] This application also provides a computer program product that, when run on a computer, causes the computer to perform the aforementioned related steps to implement the radio frequency front-end module control method in the above embodiments.

[0275] In this embodiment, the electronic device, computer-readable storage medium, computer program product or chip are all used to execute the corresponding methods provided above. Therefore, the beneficial effects that can be achieved can be referred to the beneficial effects of the corresponding methods provided above, and will not be repeated here.

[0276] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another device, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces, indirect coupling or communication connection between devices or units. The replaced units may or may not be physically separate. The component shown as a unit may be one physical unit or multiple physical units, that is, it may be located in one place or distributed in multiple different places. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0277] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0278] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solutions of the embodiments of this application, in essence, or the parts that contribute to the prior art, or all or part of the technical solutions, can be embodied in the form of a software product. This software product is stored in a storage medium and includes several instructions to cause a device (which may be a microcontroller, chip, etc.) or processor to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0279] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A radio frequency front-end module, characterized in that, The device is applied to an electronic device, which includes a first antenna. The radio frequency front-end module includes: a first antenna switch, a first filter component, a second filter component, a first power amplifier, a first low-noise amplifier, and a second low-noise amplifier. The first filtering component is used to transmit signals in the first frequency band, and the second filtering component is used to transmit signals in the second frequency band; The first antenna switch is coupled to the first antenna; The first antenna is used to transmit a transmitted signal in the first frequency band and to receive a received signal in the first frequency band; In the first state, the first antenna is also used to receive the received signal of the second frequency band; The first frequency band transmission signal is transmitted to the first antenna sequentially through the first power amplifier, the first filter component, and the first antenna switch; The received signal of the first frequency band is received sequentially through the first antenna, the first antenna switch, the first filter component, and the first low-noise amplifier; The received signal of the second frequency band is received sequentially through the first antenna, the first antenna switch, the second filter component, and the second low-noise amplifier.

2. The radio frequency front-end module according to claim 1, characterized in that, The electronic device further includes a second antenna, and the radio frequency front-end module further includes: a first switch, a second switch, a third switch, and a fourth switch; In the first state, the first frequency band transmission signal is transmitted to the first antenna sequentially through the first power amplifier, the first switch, the first filter component, and the first antenna switch; The received signal of the first frequency band is received sequentially through the first antenna, the first antenna switch, the first filter component, the second switch, the first low noise amplifier, and the fourth switch; The received signal of the second frequency band is received sequentially through the first antenna, the first antenna switch, the second filter component, the third switch, the second low-noise amplifier, and the fourth switch.

3. The radio frequency front-end module according to claim 1 or 2, characterized in that, The first port, the second port, and the third port of the first switch are all connected. The first port of the first switch is coupled to the first antenna. The second port of the first switch is coupled to the common port of the first filter component. The third port of the first switch is coupled to the common port of the second filter component.

4. The radio frequency front-end module according to claim 2 or 3, characterized in that, The electronic device further includes: a second antenna and a third antenna. The radio frequency front-end module further includes: a second antenna switch, a third filter component, a fourth filter component, a second power amplifier, a third low-noise amplifier, a fourth low-noise amplifier, a fifth switch, and a sixth switch. The third filter component is used to transmit signals of the first frequency band, and the fourth filter component is used to transmit signals of the second frequency band. The second antenna switch is coupled to the second antenna; The second antenna is used to receive the received signal of the first frequency band; The third antenna is used to transmit the transmitted signal of the second frequency band and to receive the received signal of the second frequency band. In the first state, the received signal of the first frequency band is received sequentially through the second antenna, the second antenna switch, the third filter component, the fifth switch, the third low noise amplifier and the sixth switch; The second frequency band transmission signal is transmitted to the third antenna sequentially through the second power amplifier and the fourth filter component; The received signal of the second frequency band is received sequentially through the third antenna, the fourth filter component, and the fourth low-noise amplifier.

5. The radio frequency front-end module according to claim 4, characterized in that, The radio frequency front-end module also includes: a third antenna switch, a fifth filter component, a seventh switch, an eighth switch, and a ninth switch; The third antenna switch is coupled to the third antenna, the fourth filter component, and the fifth filter component, respectively. The fourth filter component is also coupled to the seventh switch and the eighth switch, respectively. The fifth filter component is also coupled to the seventh switch and the eighth switch, respectively. The seventh switch is also coupled to the output port of the second power amplifier; The eighth switch is also coupled to the input port of the fourth low-noise amplifier, and the output port of the fourth low-noise amplifier is also coupled to the ninth switch. In the second state, the first frequency band transmission signal is transmitted to the first antenna sequentially through the first power amplifier, the first switch, the first filter component, and the first antenna switch; The received signal of the first frequency band is received sequentially through the first antenna, the first antenna switch, the first filter component, the second switch, the first low noise amplifier, and the fourth switch; The received signal of the second frequency band is received sequentially through the first antenna, the first antenna switch, the second filter component, the third switch, the second low-noise amplifier, and the fourth switch.

6. The radio frequency front-end module according to claim 5, characterized in that, In the second state, the received signal of the first frequency band is received sequentially through the second antenna, the second antenna switch, the third filter component, the fifth switch, the third low noise amplifier and the sixth switch; The second frequency band transmission signal is transmitted to the third antenna sequentially through the second power amplifier, the seventh switch, the fourth filter component, and the third antenna; The received signal of the second frequency band is received sequentially through the third antenna, the third antenna switch, the fourth filter component, the eighth switch, the fourth low-noise amplifier, and the ninth switch.

7. The radio frequency front-end module according to any one of claims 2 to 6, characterized in that, The receiving frequency bands of the first frequency band and the receiving frequency bands of the second frequency band do not overlap at all.

8. The radio frequency front-end module according to claim 7, characterized in that, The receiving frequency band of the third frequency band and the receiving frequency band of the second frequency band overlap at least partially; In the third state, the first frequency band transmission signal is transmitted to the first antenna sequentially through the first power amplifier, the first switch, the first filter component, and the first antenna switch; The received signal of the first frequency band is received sequentially through the first antenna, the first antenna switch, the first filter component, the second switch, the first low noise amplifier, and the fourth switch; The received signal of the third frequency band is received sequentially through the first antenna, the first antenna switch, the second filter component, the third switch, the second low-noise amplifier, and the fourth switch.

9. The radio frequency front-end module according to claim 8, characterized in that, In the third state, the received signal of the first frequency band is received sequentially through the second antenna, the second antenna switch, the third filter component, the fifth switch, the third low-noise amplifier, and the sixth switch; The transmission signal of the third frequency band is transmitted to the third antenna sequentially through the second power amplifier, the seventh switch, the fifth filter component, and the third antenna switch; The received signal of the third frequency band is received sequentially through the third antenna, the third antenna switch, the fifth filter component, the eighth switch, the fourth low-noise amplifier, and the ninth switch.

10. The radio frequency front-end module according to any one of claims 2 to 6, characterized in that, The receiving frequency bands of the first frequency band and the receiving frequency bands of the second frequency band overlap at least partially; the first filter component and the second filter component are the same filter component; the second switch and the third switch are the same switch; and the first low-noise amplifier and the second low-noise amplifier are the same low-noise amplifier.

11. The radio frequency front-end module according to any one of claims 3 to 6, characterized in that, The electronic device also includes a tenth switch and an eleventh switch, and both the fourth switch and the sixth switch include at least a double-pole double-throw switch; One output port of the fourth switch and one discrete port of the ninth switch are respectively coupled to two discrete ports of the tenth switch in a one-to-one correspondence. One output port of the sixth switch and another discrete port of the ninth switch are respectively coupled to the two discrete ports of the eleventh switch.

12. The radio frequency front-end module according to claim 11, characterized in that, The receiving frequency bands of the first frequency band and the receiving frequency bands of the second frequency band do not overlap at all; In the second state, the received signal of the second frequency band is received sequentially through the first antenna, the first antenna switch, the second filter component, the third switch, the second low noise amplifier, the fourth switch, and the tenth switch; The received signal of the second frequency band is received sequentially through the third antenna, the third antenna switch, the fourth filter component, the eighth switch, the fourth low-noise amplifier, the ninth switch, and the eleventh switch.

13. The radio frequency front-end module according to claim 11, characterized in that, The receiving frequency bands of the first frequency band and the receiving frequency bands of the second frequency band overlap at least partially; In the fourth state, the second antenna is used to receive the received signal of the first frequency band and the received signal of the second frequency band; The third antenna is used to transmit the transmitted signal of the second frequency band and receive the received signal of the second frequency band; The first frequency band transmission signal is transmitted to the first antenna sequentially through the first power amplifier, the first switch, the first filter component, and the first antenna switch; The received signal of the first frequency band is received sequentially through the first antenna, the first antenna switch, the second filter component, the third switch, the second low-noise amplifier, and the fourth switch.

14. The radio frequency front-end module according to claim 13, characterized in that, In the fourth state, the received signal of the first frequency band and the received signal of the second frequency band are received sequentially through the second antenna, the second antenna switch, the third filter component, the fifth switch, the third low noise amplifier and the sixth switch; The second frequency band transmission signal is transmitted to the third antenna sequentially through the second power amplifier, the seventh switch, the fourth filter component, and the third antenna switch; The received signal of the second frequency band is received sequentially through the third antenna, the third antenna switch, the fourth filter component, the fourth low-noise amplifier, the eighth switch, the ninth switch, and the tenth switch.

15. The radio frequency front-end module according to any one of claims 11 to 14, characterized in that, The radio frequency front-end module includes the tenth switch and the eleventh switch.

16. The radio frequency front-end module according to any one of claims 3 to 6, characterized in that, The fourth switch includes at least a three-pole double-throw switch, and the first input port and the second input port of the fourth switch are respectively coupled to the output port of the first low-noise amplifier and the output port of the second low-noise amplifier. The third input port of the fourth switch is connected to the first output port and the second output port of the fourth switch, and the first output port of the fourth switch is coupled to a discrete port of the ninth switch.

17. The radio frequency front-end module according to claim 16, characterized in that, The receiving frequency band of the signal in the second frequency band and the receiving frequency band of the signal in the first frequency band overlap at least partially; In the fifth state, the second antenna is used to receive the received signal of the first frequency band and the received signal of the second frequency band; The third antenna is used to transmit the transmitted signal of the second frequency band and receive the received signal of the second frequency band; The first frequency band transmission signal is transmitted to the first antenna sequentially through the first power amplifier, the first switch, the first filter component, and the first antenna switch; The received signal of the first frequency band is received sequentially through the first antenna, the first antenna switch, the second filter component, the third switch, the second low noise amplifier, the first input port of the fourth switch, and the first output port of the fourth switch; The received signal of the first frequency band and the received signal of the second frequency band are received sequentially through the second antenna, the second antenna switch, the third filter component, the fifth switch, the third low noise amplifier, the first input port of the sixth switch, and the first output port of the sixth switch; The second frequency band transmission signal is transmitted to the third antenna sequentially through the second power amplifier, the seventh switch, the fourth filter component, and the third antenna switch; The received signal of the second frequency band is received sequentially through the third antenna, the third antenna switch, the fourth filter component, the eighth switch, the fourth low-noise amplifier, the ninth switch, the third input port of the fourth switch, and the first output port of the fourth switch.

18. The radio frequency front-end module according to any one of claims 3 to 6, 16, characterized in that, The sixth switch includes at least a three-pole double-throw switch, and the first input port and the second input port of the sixth switch are respectively coupled to the output port of the first low-noise amplifier and the output port of the second low-noise amplifier. The third input port of the sixth switch is connected to the first output port and the second output port of the sixth switch, and the first output port of the sixth switch is coupled to a discrete port of the ninth switch.

19. The radio frequency front-end module according to any one of claims 3 to 6, 16, and 18, characterized in that, The receiving frequency band of the signal in the second frequency band does not overlap with the receiving frequency band of the signal in the first frequency band; In the sixth state, the first antenna is also used to receive the received signal of the second frequency band; The second antenna is used to receive the received signal of the first frequency band; The third antenna is used to transmit the transmitted signal of the second frequency band and receive the received signal of the second frequency band; The first frequency band transmission signal is transmitted to the first antenna sequentially through the first power amplifier, the first switch, the first filter component, and the first antenna switch; The received signal of the first frequency band is received sequentially through the first antenna, the first antenna switch, the second filter component, the second switch, the first low noise amplifier, and the fourth switch; The received signal of the second frequency band is received sequentially through the first antenna, the first antenna switch, the second filter component, the third switch, the second low noise amplifier, and the fourth switch; The received signal of the first frequency band is received sequentially through the second antenna, the second antenna switch, the third filter component, the fifth switch, the third low noise amplifier, the first input port of the sixth switch, and the first output port of the sixth switch; The second frequency band transmission signal is transmitted to the third antenna sequentially through the second power amplifier, the seventh switch, the fourth filter component, and the third antenna switch; The received signal of the second frequency band is received sequentially through the third antenna, the third antenna switch, the fourth filter component, the eighth switch, the fourth low-noise amplifier, the ninth switch, the third input port of the sixth switch, and the first output port of the sixth switch.

20. The radio frequency front-end module according to any one of claims 3 to 19, characterized in that, The radio frequency front-end module further includes a fourth antenna switch, which is coupled to the first antenna switch, the second antenna switch, the first antenna and the second antenna respectively. The fourth antenna switch is used to switch between the first antenna and the second antenna.

21. The radio frequency front-end module according to claim 20, characterized in that, The radio frequency front-end module also includes: a third power amplifier and a sixth filter component; The sixth filter component is coupled to the third power amplifier and the fourth antenna switch respectively, and the sixth filter component is used to transmit signals of the fourth frequency band; The fourth antenna switch is also used to transmit the transmit signal of the fourth frequency band to the first antenna or the second antenna, or to transmit the receive signal of the fourth frequency band received by the first antenna or the second antenna.

22. An electronic device comprising a first antenna and a radio frequency IC (RFIC), characterized in that, It also includes the radio frequency front-end module as described in any one of claims 1 to 21.

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