Dual-connection radio frequency front-end module, module control method and electronic equipment

Abstract

The invention relates to a dual-connection radio frequency front-end module, a module control method and electronic equipment, and aims to solve the problems of complexity and high cost of a radio frequency front-end device when dual connection of 4G LTE (Long Term Evolution) and 5G NR is realized in the prior art. According to the invention, by introducing the first change-over switch, the first transmitting link, the second transmitting link and the second change-over switch, flexible switching and cooperative transmission of radio frequency signals among different links are realized. The first radio frequency signal is output by the first transmitting link or the second transmitting link, and a transmitting path is selected through the first change-over switch; meanwhile, the other link can transmit the second radio frequency signal or the third radio frequency signal in parallel, so that multi-band and multi-standard concurrent transmission is realized. And the second change-over switch is used for dynamically controlling the power supply management chip to supply power to the different power amplification chips, so that the energy consumption and the performance are further optimized. In addition, the architecture can reduce at least one power amplification chip, so that the cost is reduced.

Description

Technical Field

[0001] The present invention relates to the field of communication technologies, and in particular, to a dual-connection radio frequency front-end module, a module control method, and an electronic device. Background Art

[0002] In existing mobile communication systems, to meet the requirements of the 4G LTE and 5G NR dual-connection (EN-DC, i.e., "dual connection") technology, a terminal must access both networks simultaneously. Please refer to Figure 1 , according to the design principle of a radio frequency transceiver, two DA (digital-to-analog) transmitters, namely TX chain0 (the first transmission link) and TX chain1 (the second transmission link), are required to implement the EN-DC combination. Among them, TX chain0 has multiple output ports with different frequency ranges, such as TX0_LB (the low-frequency output port in the first transmission link), TX0_MB (the intermediate-frequency output port), TX0_HB (the high-frequency output port in the first transmission link), and TX0_5GH (the 5G band output port in the first transmission link); while TX chain1 is provided with TX1_JB (the specific band output port in the second transmission link), TX1_MB (the intermediate-frequency output port in the second transmission link), TX1_HB (the high-frequency output port in the second transmission link), and TX1_5GH (the 5G output port in the second transmission link). Due to the design limitations of the radio frequency transceiver, the 5G n28 signal only exists in the TX0_LB port of TX chain0, the 4G B21 signal only exists in the TX1_JB port of TX chain1, and the 5G n79 signal exists in the TX0_5GH port of TX chain0 and the TX1_5GH port of TX chain1 respectively. When implementing the DC_21A_n28A and DC_21A_n79A combinations, two low-power power amplifier chips (L-PAMiD) supporting the 5G ultra-high band (UHB) band n79 need to be additionally configured ( Figure 1 shown by reference numerals 1 and 2). In the above solution, the configuration of the dual L-PAMiD chips significantly increases the occupied area of the radio frequency front-end devices on the terminal main board, which not only affects the compactness of the overall hardware design but also brings the problem of increased device cost. Summary of the Invention

[0003] The purpose of the present invention is to provide a dual-connection radio frequency front-end module and an electronic device, which optimize the signal propagation path and reduce the complexity and cost of the overall architecture.

[0004] To solve the above technical problems, the present invention provides a dual-connection radio frequency front-end module, including: a first switching switch, a first transmission link, and a second transmission link;

[0005] The first transmission link or / and the second transmission link respectively output a first radio frequency signal to the first switch; the first switch selects one of the first radio frequency signals for transmission;

[0006] When the first switch selects the first transmission link to transmit the first radio frequency signal, the second transmission link transmits a third radio frequency signal; or,

[0007] When the first switch selects the second transmission link to transmit the first radio frequency signal, the first transmission link transmits a second radio frequency signal; or / and,

[0008] When the first transmission link transmits the second radio frequency signal, the second transmission link transmits the fourth radio frequency signal.

[0009] Further, it further includes a first radio frequency link, and the first radio frequency link is connected to the output ends of the first transmission link and the second transmission link through the first switch;

[0010] A first power amplification chip and a first antenna are sequentially arranged on the first radio frequency link;

[0011] After the first radio frequency signal is switched to the first radio frequency link, it is amplified by the first power amplification chip and then transmitted through the first antenna.

[0012] Further, it further includes a second radio frequency link, and the second radio frequency link is connected to the output end of the first transmission link;

[0013] A second power amplification chip and a second antenna are sequentially arranged on the second radio frequency link;

[0014] The second radio frequency signal is amplified by the second power amplification chip and then output through the second antenna.

[0015] Further, it further includes a first power management chip and a second switch;

[0016] When the second switch is switched to the first input end, the first power management chip supplies power to the first power amplification chip and the second power amplification chip.

[0017] Further, it further includes a third radio frequency link, and the third radio frequency link is connected to the output end of the second transmission link;

[0018] A third power amplification chip and a third antenna are sequentially arranged on the third radio frequency link;

[0019] The third radio frequency signal or / and the fourth radio frequency signal are amplified by the third power amplification chip and then output through the third antenna.

[0020] Further, it further includes a second power management chip; when the second switching switch switches to the second input terminal, the second power management chip supplies power to the second power amplifier chip and the third power amplifier chip through the second switching switch.

[0021] Further, both the first switching switch and the second switching switch are single-pole double-throw switches.

[0022] The second power management chip supplies power to the second power amplifier chip or the third power amplifier chip.

[0023] Further, the first radio frequency signal is a radio frequency signal output via a 5G high-frequency port in the first transmission link or the second transmission link;

[0024] The second radio frequency signal is a radio frequency signal output via a specific frequency band output port in the first transmission link;

[0025] The third radio frequency signal is a radio frequency signal output via a low-frequency port in the second transmission link.

[0026] On the other hand, the present invention also discloses an electronic device including the above-mentioned dual-connection radio frequency front end.

[0027] On the other hand, the present invention also discloses a method for controlling a dual-connection radio frequency front end, and the method includes:

[0028] The first radio frequency signal is output via the first transmission link and / or the second transmission link, and one of the first radio frequency signals is selected for transmission;

[0029] When the first transmission link is selected to transmit the first radio frequency signal, the second transmission link transmits the third radio frequency signal; or,

[0030] When the second transmission link is selected to transmit the first radio frequency signal, the first transmission link transmits the second radio frequency signal; or / and,

[0031] When the first transmission link transmits the second radio frequency signal, the second transmission link transmits the fourth radio frequency signal.

[0032] Compared with the prior art, the present invention has at least the following beneficial effects:

[0033] The present invention realizes the flexible scheduling and cooperative transmission of radio frequency signals between different links by introducing a configurable first switching switch and two parallel transmitting radio frequency links in a dual-connectivity radio frequency front-end module, simplifying the overall structure of the dual-connectivity radio frequency front-end module. While the first radio frequency signal is transmitted on any one link, the second or third radio frequency signal can be transmitted in parallel on the other link, significantly improving the utilization rate of radio frequency resources and the system throughput capacity, meeting the requirements for concurrent transmission and multi-band operation in the EN-DC scenario, and effectively enhancing the working efficiency of the front-end module and the overall communication performance of the system. Brief Description of the Drawings

[0034] Figure 1 is a schematic diagram of the structure of a radio frequency front-end module in the prior art;

[0035] Figure 2 is a schematic diagram of the structure of a dual-connectivity radio frequency front-end module in Embodiment 1 of the present invention;

[0036] Figure 3 is a schematic diagram of the method flow of a dual-connectivity radio frequency front-end module in Embodiment 2 of the present invention. Detailed Embodiments

[0037] The following will describe the present invention with reference to the schematic diagrams, which show preferred embodiments of a dual-connectivity radio frequency front-end module, a module control method, and an electronic device of the present invention. It should be understood that those skilled in the art can modify the present invention described herein while still achieving the advantageous effects of the present invention. Therefore, the following description should be understood as a broad guidance for those skilled in the art and not as a limitation on the present invention.

[0038] In the following paragraphs, the present invention will be described more specifically by way of example with reference to the accompanying drawings. The advantages and features of the present invention will be clearer according to the following description and the claims. It should be noted that the drawings are all in a very simplified form and use non-precise scales, only for the purpose of conveniently and clearly assisting in explaining the purpose of the embodiments of the present invention.

[0039] Embodiment 1

[0040] Please refer to Figure 2 , this embodiment discloses a dual-connectivity radio frequency front-end module, including: a first switching switch 3, a first transmitting link 1, and a second transmitting link 2.

[0041] The first transmitting link 1 or / and the second transmitting link 2 respectively output a first radio frequency signal to the first switching switch 3; the first switching switch 3 selects one of the first radio frequency signals for transmission.

[0042] When the first switching switch 3 selects the first transmitting link 1 to transmit the first radio frequency signal, the second transmitting link 2 transmits a third radio frequency signal; or,

[0043] When the first switching switch 3 selects the second transmitting link 2 to transmit the first radio frequency signal, the first transmitting link 1 transmits the second radio frequency signal; or / and,

[0044] When the first transmitting link 1 transmits the second radio frequency signal, the second transmitting link 2 transmits the fourth radio frequency signal.

[0045] In this embodiment, by introducing a configurable first switching switch 3 and two parallel transmitting radio frequency links in the dual-connectivity radio frequency front-end module, flexible scheduling and cooperative transmission of radio frequency signals between different links are realized, and the overall structure of the dual-connectivity radio frequency front-end module is simplified. While any one link transmits the first radio frequency signal, the other link can transmit the second or third radio frequency signal in parallel, significantly improving the utilization rate of radio frequency resources and the system throughput capacity, meeting the requirements for concurrent transmission and multi-band operation in the EN-DC scenario, and effectively enhancing the working efficiency of the front-end module and the overall communication performance of the system.

[0046] It can be understood that the dual-connectivity (EN-DC) described in this embodiment refers to the dual-connectivity between the 4G radio access network and 5G NR. Among them, DC in EN-DC represents Dual Connectivity, that is, Dual Connectivity (DC); E represents the evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access (Evolved-UMTS Terrestrial Radio Access, E-UTRA or EUTRA), that is, the 4G radio access network; N represents (New Radio, NR), that is, 5G new radio; NG represents (Next Generation, NG) the next-generation core network, that is, the 5G core network. In addition, the two parallel radio frequency signals for realizing ENDC in this embodiment need to be independently transmitted through different transmitting links respectively, so as to meet the multi-mode concurrent communication ability under dual-connectivity.

[0047] In this embodiment, the embodiment further includes a first radio frequency link 7, and the first radio frequency link 7 is connected to the output ends of the first transmitting link 1 and the second transmitting link 2 through the first switching switch 3.

[0048] A first power amplification chip 70 and a first antenna Ant0 are sequentially arranged on the first radio frequency link 7.

[0049] After the first radio frequency signal is switched to the first radio frequency link 7, it is amplified by the first power amplification chip 70 and then transmitted through the first antenna Ant0.

[0050] In a specific embodiment, the first radio frequency signal is output via a 5G high-frequency port (TX0_5GH or TX1_5GH) in the first transmission link 1 or the second transmission link 2. The first radio frequency signal may be a high-frequency NR signal such as 5G NR n78, 5G NR n77 signal or 5G NR n79 signal. Of course, those skilled in the art can also appropriately adjust the output port configuration and signal frequency band according to the terminal design requirements and network deployment environment.

[0051] Furthermore, this embodiment further includes a second radio frequency link 8, and the second radio frequency link 8 is connected to the output end of the first transmission link 1.

[0052] A second power amplifier chip 80 and a second antenna Ant1 are sequentially arranged on the second radio frequency link 8.

[0053] The second radio frequency signal is output through the second antenna Ant1 after being amplified by the second power amplifier chip 80.

[0054] In a specific embodiment, the second radio frequency signal is output via a specific frequency band output port (TX1_JB) in the first transmission link 1. The second radio frequency signal may be signals such as 4G LTE B21 and 4G LTE B11. Of course, those skilled in the art can also appropriately adjust the output port configuration and signal frequency band according to the terminal design requirements and network deployment environment.

[0055] Furthermore, this embodiment further includes a third radio frequency link 9, and the third radio frequency link 9 is connected to the output end of the second transmission link 2.

[0056] A third power amplifier chip 90 and a third antenna Ant3 are sequentially arranged on the third radio frequency link 9.

[0057] The third radio frequency signal or / and the fourth radio frequency signal are output through the third antenna Ant3 after being amplified by the third power amplifier chip 90.

[0058] In a specific embodiment, both the third radio frequency signal and the fourth radio frequency signal are signals output via a low-frequency output port (TX0_LB) in the second transmission link 2. The fourth radio frequency signal may be low-frequency NR signals such as 5G NR n28, 5G NR n71, 5G NR n8; the third radio frequency signal may be low-frequency LTE signals such as 4G LTE B28, 4G LTE B5, 4G LTE B8. Of course, those skilled in the art can also appropriately adjust the output port configuration and signal frequency band according to the terminal design requirements and network deployment environment.

[0059] In another specific embodiment, the types of the first power amplifier chip 70, the second power amplifier chip 80, and the third power amplifier chip 90 can be selected according to the radio frequency bands required in practice. For example, when the first radio frequency signal is a 5G n79 signal, the first power amplifier chip 70 can select a UHB band L-PAMID chip, which has the characteristics of adapting to high-frequency transmission, low noise, and high linearity, and is suitable for processing 5G NR n79 signals; when the second radio frequency signal is 4G LTE B21, the second power amplifier chip 80 can select a PA chip specifically designed for the 4G LTE B21 band; when the third radio frequency signal is 4G LTE B8 signal and the fourth radio frequency signal is 5G NR n28 signal, the third power amplifier chip 90 can select a PA chip specifically designed for the above low-frequency signals.

[0060] Furthermore, this embodiment further includes a first power management chip 5 and a second switch 4.

[0061] Specifically, when the second switch 4 switches to the first input terminal RF1, the first power management chip 5 supplies power to the first power amplifier chip 70 and the second power amplifier chip 80.

[0062] Furthermore, this embodiment further includes a second power management chip 6.

[0063] Specifically, when the second switch 4 switches to the second input terminal RF2, the second power management chip 6 supplies power to the second power amplifier chip 80 and the third power amplifier chip 90.

[0064] In this embodiment, during the specific signal transmission process, the first power management chip 5 and the second power management chip 6 are respectively used to provide independent power supply support for the two radio frequency transmission links participating in ENDC dual connection. For example, when the first switch 3 selects the first transmission link 1 to transmit the first radio frequency signal and the second transmission link 2 to transmit the third radio frequency signal, the first power management chip 5 supplies power to the first radio frequency link 7, and the second power management chip 6 supplies power to the third radio frequency link 9; when the first switch 3 selects the second transmission link 2 to transmit the first radio frequency signal and the first transmission link 1 to transmit the second radio frequency signal, the first power management chip 5 supplies power to the first radio frequency link 7, and the second power management chip 6 supplies power to the second radio frequency link 8.

[0065] In this embodiment, by setting the second switching switch 4, the second power management chip 6 can supply power to the power amplifier chips in the first radio frequency link 7 and the power amplifier chips in the second radio frequency link 8 at the same time, so as to realize the dynamic power scheduling of the power amplifiers on different radio frequency links.

[0066] In a specific embodiment, the selection of the first power management chip 5 and the second power management chip 6 can be determined according to the requirements of different radio frequency links for output current, load regulation ability and noise characteristics. Preferably, the first power management chip 5 and the second power management chip 6 can respectively select PMICs (Power Management Integrated Circuits) with high output current and low ripple to meet the high-power transmission requirements and higher linearity. Similarly preferably, PMICs with fast dynamic regulation ability can be considered for flexible switching of different frequency bands or different transmission powers in the EN-DC mode.

[0067] In a specific embodiment, both the first switching switch 3 and the second switching switch 4 are single-pole double-throw switches.

[0068] In another specific embodiment, the driving of the first switching switch 3 and the second switching switch 4 is realized by a control circuit such as a microprocessor, a dedicated driver integrated circuit, a single-chip microcomputer, a field programmable gate array or a digital signal processor.

[0069] It can be seen that through the above multi-level signal routing mechanism using the first switching switch 3 and the second switching switch 4, the use of at least one radio frequency amplifier chip is reduced, the hardware architecture is significantly simplified, and the development complexity and cost are reduced. The radio frequency link adopts multi-band filters and intelligent antenna tuning technology to improve the frequency band compatibility and signal quality of the signal. In the EN-DC mode, based on the dynamic power distribution and intelligent spectrum management algorithm, the system can achieve fast switching and cooperative transmission, optimizing the signal coverage and transmission efficiency.

[0070] In a specific embodiment, when it is desired to realize DC_21A_n79A, DC_21A_n28A, and DC_28A_n79A, the specific connection method of the above radio frequency system is as follows:

[0071] The first input end RF1 of the first switching switch 3 is connected to the TX1_5GH port of the first transmitting link 1, the second input end RF2 of the first switching switch 3 is connected to the TX0_5GH port of the second transmitting link 2, and the output end of the first switching switch 3 is connected to the input end of the first power amplifier chip 70 on the first radio frequency link 7. The output end of the first power amplifier chip 70 is connected to the first radio frequency antenna Ant0.

[0072] The TX1_JB port of the first transmission link 1 is connected to the input end of the second power amplifier chip 80 on the second radio frequency link 8, and the output end of the second power amplifier chip 80 is connected to the second radio frequency antenna Ant1.

[0073] The TX0_LB port of the second transmission link 2 is connected to the input end of the third power amplifier chip 90 on the third radio frequency link 9, and the output end of the third power amplifier chip 90 is connected to the third radio frequency antenna Ant3.

[0074] The output end of the first power management chip 5 is connected to the first power amplifier chip 70 and the first input end RF1 of the second switching switch 4, and the output end of the second switching switch 4 is connected to the second power amplifier chip 80; the output end of the second power management chip 6 is connected to the second input end RF2 of the second switching switch 4 and the third power amplifier chip 90.

[0075] When implementing DC_21A_n79A and DC_21A_n28A using the above architecture, the use of a 5G_n79 power amplifier chip can be reduced, optimizing the overall circuit design. At the same time, through intelligent switching and optimizing the signal path, the fast co-transmission of 5GNRn28 and 4G LTE B21 signals, 4G LTE B21 and 5G NRn79, and 4G LTE B28 and 5G NRn79 is achieved, improving signal coverage and transmission efficiency.

[0076] It can be understood that the applicable range of the dual-connection radio frequency front-end module disclosed in this embodiment is not limited to the specific radio frequency bands mentioned above, and can also be extended to other radio frequency bands of 5G NR or 4G LTE. Those skilled in the art can flexibly extend the technical solution of this embodiment to other communication protocols and other radio frequency bands not specifically mentioned according to actual needs and terminal designs, and no specific limitation is made here.

[0077] The electronic devices involved in this embodiment may include various handheld devices, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to a wireless modem with wireless communication functions, as well as various forms of user equipment (User Equipment, UE) (such as mobile phones), mobile stations (Mobile Station, MS), terminal devices (Terminal Device), and so on. For the sake of convenience of description, the devices mentioned above are collectively referred to as electronic devices.

[0078] In this embodiment, under the EN-DC architecture, the electronic device is connected to the 4G core network, with the 4G base station as the master station and the 5G base station as the secondary station.

[0079] In this embodiment, in the NE-DC architecture, a 5G core network is introduced, with the 5G base station as the master station and the 4G base station as the secondary station.

[0080] Embodiment 2

[0081] Please refer to Figure 3 , this embodiment provides a method for controlling a dual-connectivity radio frequency front-end module to control the dual-connectivity radio frequency front-end module disclosed in Embodiment 1. The specific control method is as follows:

[0082] The first radio frequency signal is output via the first transmission link 1 and / or the second transmission link 2, and one of the first radio frequency signals is selected for transmission.

[0083] Specifically, when the first transmission link 1 is selected to transmit the first radio frequency signal, the second transmission link 2 transmits the third radio frequency signal; or,

[0084] When the second transmission link 2 is selected to transmit the first radio frequency signal, the first transmission link 1 transmits the second radio frequency signal; or / and,

[0085] When the first transmission link 1 transmits the second radio frequency signal, the second transmission link 2 transmits the fourth radio frequency signal.

[0086] In this embodiment, through precise control of the switching state and power supply path, synchronous transmission and flexible routing of multi-link signals are achieved, thus supporting the efficient co-transmission of 4G and 5G signals. This design not only greatly improves the data transmission rate and network coverage ability, but also optimizes the performance and stability of the terminal device in different working modes.

[0087] A specific implementation solution is as follows: When implementing DC_21A_n79A, control the first power management chip 5 to supply power to the first power amplifier chip 70 on the first radio frequency link 7, and control the second power chip 6 to supply power to the second power amplifier chip 80 on the second radio frequency link 8. After the first power amplifier chip 70 and the second power amplifier chip 80 are powered on, the B21 signal is output through the TX1_JB port of the first transmission link 1 to the second power amplifier chip 80 on the second radio frequency link 8, and after being processed by the second power amplifier chip 80, it is transmitted by the second antenna Ant1; the first switch 3 selects the n79 signal transmitted by the second transmission link 2 to the first radio frequency link 7, and the n79 signal is processed by the first power amplifier chip 70 and then transmitted by the first antenna Ant0.

[0088] Another specific implementation solution is as follows: When implementing DC_21A_n28A, control the second power management chip 6 to supply power to the third power amplifier chip 90, and the first power management chip 5 to supply power to the second power amplifier chip 80. After the second power amplifier chip 80 and the third power amplifier chip 90 are powered on, the B21 signal is output from the TX1_JB port of the first transmission link 1 to the second power amplifier chip 80 in the second radio frequency link 8, and after being processed by the second power amplifier chip 80, it is transmitted by the second antenna Ant1; the n28 signal is output from the TX0_LB port of the second transmission link 2 to the third power amplifier chip 90 in the third radio frequency link 9, and after being processed by the third power amplifier chip 90, it is transmitted by the third antenna Ant3.

[0089] Another specific implementation solution is as follows: When implementing DC_28A_n79A, control the first power management chip 5 to supply power to the first power amplifier chip 70, and the second power management chip 6 to supply power to the third power amplifier chip 90. After the first power amplifier chip 70 and the third power amplifier chip 90 are powered on, the B28 signal is output from the TX0_LB port of the second transmission link 2 to the third power amplifier chip 90 in the third radio frequency link 9; the first switch 3 selects the n79 signal transmitted by the first transmission link 1 to the first radio frequency link 7, and after being processed by the first power amplifier chip 70, the n79 signal is transmitted by the first antenna Ant0.

[0090] In summary, the dual-connection radio frequency front-end module control method provided in this embodiment realizes the efficient cooperative transmission of 4G and 5G signals through precise switching and power supply management, significantly improving the data transmission rate and network coverage. Through flexible signal routing optimization, efficient multi-link cooperative transmission, and the design of disconnecting unused radio frequency links, this method effectively reduces the system power consumption and complexity, while improving the performance and reliability of the system in the EN-DC mode, further enhancing the adaptability and user experience of the terminal device.

[0091] Obviously, those skilled in the art can make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.

Claims

1. A dual-connection RF front-end module, characterized in that: include: A first switching switch, a first transmission chain, and a second transmission chain; The first transmission link and / or the second transmission link respectively output the first radio frequency signal to the first switching switch; the first switching switch selects one of the first radio frequency signals for transmission; When the first switch selects the first transmission link to transmit the first radio frequency signal, the second transmission link transmits the third radio frequency signal; or, When the first switch selects the second transmission link to transmit the first radio frequency signal, the first transmission link transmits the second radio frequency signal; or / and, When the first transmission chain transmits the second radio frequency signal, the second transmission chain transmits a fourth radio frequency signal.

2. The dual-connection RF front-end module according to claim 1, characterized in that: It also includes a first radio frequency link, which is connected to the output ends of the first transmission link and the second transmission link through the first switching switch; The first radio frequency link is provided with a first power amplifier chip and a first antenna in sequence; After the first RF signal is switched to the first RF link, it is amplified by the first power amplifier chip and then transmitted through the first antenna.

3. The dual-connection RF front-end module according to claim 2, characterized in that: Also includes a second radio frequency link, the second radio frequency link is connected to the output end of the first transmission link; The second radio frequency link is provided with a second power amplifier chip and a second antenna in sequence; The second radio frequency signal is amplified by the second power amplifier chip and then output through the second antenna.

4. The dual-connection RF front-end module according to claim 3, characterized in that: Also includes a first power management chip and a second switching switch; When the second switch is switched to the first input end, the first power management chip supplies power to the first power amplifier chip and the second power amplifier chip.

5. The dual-connection RF front-end module according to claim 3, characterized in that: Also includes a third radio frequency link, the third radio frequency link is connected to the output end of the second transmission link; The third radio frequency link is provided with a third power amplifier chip and a third antenna in sequence; The third radio frequency signal and / or the fourth radio frequency signal are amplified by the third power amplifier chip and then output through the third antenna.

6. The dual-connection RF front-end module according to claim 5, characterized in that: Also includes a second power management chip; When the second switch is switched to the second input terminal, the second power management chip supplies power to the second power amplifier chip and the third power amplifier chip through the second switch.

7. The dual-connection RF front-end module according to claim 6, characterized in that: The first switch and the second switch are both single-pole double-throw switches.

8. The dual-connection RF front-end module according to claim 1, characterized in that: The first radio frequency signal is a radio frequency signal output via a 5G high frequency port in the first transmission link or the second transmission link; The second radio frequency signal is a radio frequency signal output via a specific frequency band output port in the first transmission link; The third RF signal and the fourth RF signal are RF signals output via a low frequency port in the second transmission chain.

9. An electronic device, characterized in that: Comprising a dual-connection radio frequency front-end module as described in any one of claims 1-8.

10. A dual-connection radio frequency front-end control method, characterized in that: The method comprises: The first radio frequency signal is output via the first transmission link and / or the second transmission link, and one of the first radio frequency signals is selected for transmission; When the first transmission link is selected to transmit the first radio frequency signal, the second transmission link transmits the third radio frequency signal; or, When the second transmission link is selected to transmit the first radio frequency signal, the first transmission link transmits the second radio frequency signal; or / and, When the first transmission chain transmits the second radio frequency signal, the second transmission chain transmits a fourth radio frequency signal.

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