Radio frequency front-end circuit and electronic equipment

Abstract

According to the radio frequency front-end circuit and the electronic equipment, the first end of a switch unit is used for being electrically connected with an antenna radiator, the signal transmitting end of a satellite communication module is electrically connected with the second end of the switch unit, and the signal receiving end of the satellite communication module is electrically connected with the third end of the switch unit. The GNSS module is used for transmitting satellite communication transmitting signals in a first time period through the switch unit and the antenna radiator and receiving satellite communication receiving signals in a second time period through the third end of the switch unit and the antenna radiator, and the signal receiving end of the GNSS module is electrically connected with the third end of the switch unit. And the antenna unit is used for receiving the GNSS receiving signal in the second time period through the third end of the switch unit and the antenna radiator, so that the space occupied by the satellite communication module and other antennas is reduced, the cost is reduced, and the multiplexing rate of the radio frequency front-end circuit is improved.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a radio frequency front-end circuit and electronic equipment. Background Art

[0002] Satellite communications refers to a method of communication using artificial satellites. A satellite communications system consists of ground stations, satellites, and user terminals. The ground stations transmit information to the satellites via radio waves. The satellites then forward the information to ground stations in the target area, which then transmit the information to the user terminals.

[0003] Satellite communications offer the advantages of global coverage and unlimited geographical restrictions, providing wide-area communications services unaffected by factors such as location and weather. They play a vital role in remote areas, mountainous regions, and oceans, as well as in specific scenarios such as disaster relief and maritime navigation. Satellite communications enable a variety of communication methods, including voice, data, and image communication, including telephones, internet access, and television broadcasting. Currently, satellite communications are widely used in military, aerospace, telecommunications, radio and television, and weather forecasting.

[0004] Satellite communications are rapidly developing with the continuous advancement of technology and reduction in costs. The next generation of satellite communication systems will be faster, more efficient, and more reliable, providing a wider range of communication services. At the same time, with the increasing development of 6G communications and the idea of ​​satellite internet, the challenge is to further reduce the space occupied by satellite communication modules and other antennas in user terminals, reduce costs, and increase the reuse rate of RF front-end circuits. Summary of the Invention

[0005] The present application provides a radio frequency front-end circuit and an electronic device having the radio frequency front-end circuit, which can reduce the space occupied by a satellite communication module and other antennas, reduce costs, and improve the reuse rate.

[0006] In a first aspect, an embodiment of the present application provides a radio frequency front-end circuit, comprising:

[0007] a switch unit, the switch unit comprising a first end, a second end, and a third end, the first end being used to electrically connect to the antenna radiator;

[0008] a satellite communication module, wherein a signal transmitting end of the satellite communication module is electrically connected to the second end of the switch unit, and a signal receiving end of the satellite communication module is electrically connected to the third end of the switch unit, and is configured to transmit a satellite communication transmission signal through the switch unit and the antenna radiator in a first time period, and receive a satellite communication reception signal through the third end of the switch unit and the antenna radiator in a second time period; and

[0009] A global satellite navigation system GNSS module, wherein the signal receiving end of the GNSS module is electrically connected to the third end of the switch unit, and is used to receive the GNSS receiving signal in the second time period through the third end of the switch unit and the antenna radiator.

[0010] In a second aspect, an embodiment of the present application provides an electronic device, comprising the above-mentioned radio frequency front-end circuit and an antenna radiator, wherein the first end of the switch unit is electrically connected to the antenna radiator.

[0011] The RF front-end circuit and electronic device provided in the present application are designed to electrically connect the first end of the switch unit to the antenna radiator, the signal transmitting end of the satellite communication module to the second end of the switch unit, and the signal receiving end of the satellite communication module to the third end of the switch unit, so as to transmit the satellite communication transmitting signal through the switch unit and the antenna radiator in the first time period, and receive the satellite communication receiving signal through the third end of the switch unit and the antenna radiator in the second time period, and the signal receiving end of the GNSS module to the third end of the switch unit, so as to receive the GNSS receiving signal through the third end of the switch unit and the antenna radiator in the second time period. In this way, one antenna radiator can simultaneously support the transmission of satellite communication signals and the simultaneous reception of satellite communication frequency bands and GNSS frequency bands, thereby reducing the space occupied by the satellite communication module and other antennas, reducing costs, improving the reuse rate of the RF front-end circuit, and realizing real-time updating of positioning information during satellite communication. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments.

[0013] Figure 1 is a structural diagram of an electronic device provided in an embodiment of the present application;

[0014] Figure 2 is a schematic diagram of the exploded structure of an electronic device provided in an embodiment of the present application;

[0015] Figure 3 is a partial rear view of an electronic device provided in an embodiment of the present application;

[0016] Figure 4 This is a circuit block diagram of a satellite communication module and a GNSS module provided in an embodiment of the present application electrically connected to an antenna radiator through a switch unit;

[0017] Figure 5 This is a working timing diagram of the radio frequency front-end circuit provided in an embodiment of the present application;

[0018] Figure 6This is a circuit block diagram of a radio frequency front-end circuit provided by an embodiment of the present application, including a first low-noise amplifier;

[0019] Figure 7 This is a circuit block diagram of a radio frequency front-end circuit including a power divider provided in an embodiment of the present application;

[0020] Figure 8 is a circuit block diagram of a radio frequency front-end circuit including a fourth filter provided in an embodiment of the present application;

[0021] Figure 9 yes Figure 8 The RF front-end circuit shown also includes a circuit block diagram of a first filter, a second low-noise amplifier, a third low-noise amplifier, and a second filter;

[0022] Figure 10 This is a circuit block diagram of a radio frequency front-end circuit including a dual-channel filter provided in an embodiment of the present application;

[0023] Figure 11 1 is a circuit block diagram of a dual-channel filter provided in an embodiment of the present application, including a first bandpass circuit and a second bandpass circuit;

[0024] Figure 12 This is another working timing diagram of the RF front-end circuit provided in an embodiment of the present application;

[0025] Figure 13 This is a circuit block diagram of a radio frequency front-end circuit including a matching circuit provided in an embodiment of the present application;

[0026] Figure 14 1 is a structural diagram of a matching circuit provided in an embodiment of the present application, including a matching switch, a first matching branch, and a second matching branch;

[0027] Figure 15 1 is a schematic diagram of a structure in which the first matching branch provided by an embodiment of the present application is a first grounding inductor and the second matching branch is a second grounding inductor;

[0028] Figure 16 This is a schematic diagram of a structure in which the first matching branch provided by an embodiment of the present application is an open circuit and the second matching branch is a grounded capacitor;

[0029] Figure 17 This is a structural diagram of an embodiment of the present application, wherein a matching switch includes a first N-type transistor and a first P-type transistor, and a switch unit includes a second N-type transistor and a second P-type transistor;

[0030] Figure 18 This is a structural diagram of the radio frequency front-end circuit provided by an embodiment of the present application, which also includes a cellular mobile communication module electrically connected to an antenna unit;

[0031] Figure 19This is a circuit block diagram of the radio frequency front-end circuit provided by an embodiment of the present application, which also includes a cellular mobile communication module electrically connected to a power splitter;

[0032] Figure 20 This is a circuit block diagram of a radio frequency front-end circuit provided by an embodiment of the present application, further comprising a cellular mobile communication module electrically connected to a three-channel filter;

[0033] Figure 21 This is a signal receiving and transmitting block diagram of an electronic device provided in an embodiment of the present application.

[0034] Reference numerals:

[0035] 1000-Electronic device; 100-RF front-end circuit; 200-Display screen; 300-Midframe; 400-Back cover; 310-Midboard; 320-Frame; 600-Motherboard; 700-Battery; 10-Antenna radiator; 20-Switch unit; 30-Satellite communication module; 40-GNSS module; 20a-First end; 20b-Second end; 20c-Third end; 321-Top edge; 322-First side edge; 323-Bottom edge; 324-Second side edge; LNA1-First low-noise amplifier; 50-Power divider; S W1-first filter; LNA2-second low-noise amplifier; SW2-second filter; LNA3-third low-noise amplifier; SW3-third filter; SW4-dual-channel filter; D1-first band-pass circuit; D2-second band-pass circuit; PA-power amplifier; M-matching circuit; K1-matching switch; M1-first matching branch; M2-second matching branch; T1-first N-type transistor; T2-first P-type transistor; T3-second N-type transistor; T4-second P-type transistor; 80-cellular mobile communication module. DETAILED DESCRIPTION

[0036] The technical solution of this application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described in this application are only some embodiments, not all embodiments. Based on the embodiments provided in this application, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this application.

[0037] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it necessarily refer to mutually exclusive, independent, or alternative embodiments to other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0038] The terms "first," "second," and so on, in the specification and claims of this application and the accompanying drawings are used to distinguish between different objects, not to describe a specific order. Furthermore, the terms "including," "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a component or device comprising one or more parts is not limited to the one or more parts listed, but may optionally include one or more parts that are not listed but are inherent to the illustrated product, or one or more parts that should be present based on the described functionality.

[0039] The present application relates to a satellite communication system and a GNSS system. The satellite communication system involved in the present application is a satellite communication system that can realize multiple communication modes such as voice, data and image, including telephone, Internet access, television broadcasting, etc.

[0040] The GNSS (Global Navigation Satellite System) involved in this application is called the Global Navigation Satellite System. It is a technology that uses satellites for navigation and positioning. By receiving signals transmitted by satellites, the distance between the receiver and the satellite is calculated, thereby determining the position of the receiver. At present, the world's major GNSS systems include the United States' GPS (Global Positioning System), Russia's GLONASS (Globalnaya Navigatsionnaya Sputnikovaya Sistema), Europe's Galileo (Galileo Satellite Navigation System) and China's BeiDou (BeiDou Navigation Satellite System). The center frequency of the BeiDou-2 B1 band is 1561.098MHz. The center frequency of the BeiDou-3 B1 band is 1575.42MHz. In the GLONESS band, the operating frequency range of the L1 band is 1602.0 to 1615.5MHz. In the GPS system, the operating frequency of the L1 band is 1575.42MHz.

[0041] Satellite communications typically transmit in the 1.6-1.7 GHz band, and receive in the 1.5-1.6 GHz band. For example, Inmarsat's fourth-generation satellites transmit in the 1626.5-1660.5 MHz band, and receive in the 1525-1559 MHz band. Iridium satellites operate in the 1616-1626.5 MHz band. Shuar satellites transmit in the 1626.5-1660.5 MHz band, and receive in the 1525-1559 MHz band.

[0042] As can be seen above, the receiving frequency band of satellite communications is similar to some operating frequency bands in GNSS systems. Some satellite communications use TDD time division multiplexing, with different uplink and downlink frequencies.

[0043] See also Figure 1 , Figure 1 This is a schematic diagram of the structure of an electronic device 1000 provided in an embodiment of the present application. The electronic device is a user terminal for satellite communications as described in this application. Electronic device 1000 includes, but is not limited to, mobile phones, tablet computers, laptop computers, computers, wearable devices, drones, robots, and other devices with communication capabilities. This embodiment of the present application uses a mobile phone as an example; other electronic devices can be referenced similarly.

[0044] See also Figure 2 , Figure 2 : is a partially exploded schematic diagram of an electronic device 1000. The electronic device 1000 includes a radio frequency front-end circuit 100. Taking the electronic device 1000 as a mobile phone as an example, the working environment of the radio frequency front-end circuit 100 is explained. The electronic device 1000 includes a display screen 200, a middle frame 300, and a back cover 400 arranged in sequence along the thickness direction. Among them, the middle frame 300 includes a middle plate 310 and a frame 320 surrounding the side of the middle plate 310. The frame 320 can be a conductive frame. Of course, in other embodiments, the electronic device 1000 may not have a middle plate 310. The display screen 200, the middle plate 310, and the back cover 400 are stacked in sequence, and a receiving space is formed between the display screen 200 and the middle plate 310, and between the middle plate 310 and the back cover 400 to accommodate components such as the main board 600, the camera module, the receiver module, the battery 700, and various sensors. One side of the frame 320 is connected to the edge of the display screen 200, and the other side of the frame 320 is connected to the edge of the back cover 400, thereby forming a complete external structure of the electronic device 1000. In this embodiment, the frame 320 and the middle plate 310 are an integral structure, and the frame 320 and the back cover 400 can be separate structures. The above is the operating environment of the RF front-end circuit 100 using a mobile phone as an example, but the RF front-end circuit 100 of the present application is not limited to the above operating environment.

[0045] See also Figure 3 and Figure 4 The RF front-end circuit 100 includes a switch unit 20 , a satellite communication module 30 and a GNSS module 40 .

[0046] Optional, see Figure 4 The switch unit 20 at least includes a first end 20a, a second end 20b and a third end 20c.

[0047] The electronic device 1000 further includes an antenna radiator 10, and the first end 20a of the switch unit 20 is electrically connected to the antenna radiator 10. The electrical connection in this application includes direct electrical connection or indirect electrical connection through other electronic devices or circuits.

[0048] The antenna radiator 10 includes, but is not limited to, a metal frame 320, a metal frame embedded in a plastic frame 320, a metal radiator located within or on the surface of the frame 320, a flexible printed circuit board (FPC) antenna formed on a flexible printed circuit board (FPC), a laser direct structuring (LDS) antenna, a print direct structuring (PDS) antenna, a conductive sheet antenna (e.g., a metal bracket antenna), etc. In this embodiment, the antenna radiator 10 is taken as a portion of the metal frame 320 of the electronic device 1000.

[0049] Further, see Figure 3 The frame 320 of electronic device 1000 includes a top edge 321, a first side edge 322, a bottom edge 323, and a second side edge 324, which are connected in sequence. Top edge 321 is the side facing upward when electronic device 1000 is held in portrait orientation. Antenna radiator 10 is part of top edge 321, facilitating direct signal transmission between antenna radiator 10 and satellites and GNSS equipment in the sky. This ensures that RF front-end circuit 100 has a higher upper hemisphere radiation ratio.

[0050] See also Figure 4 The signal transmitting end of the satellite communication module 30 is electrically connected to the second end 20b of the switch unit 20. The signal receiving end of the satellite communication module 30 is electrically connected to the third end 20c of the switch unit 20. The satellite communication module 30 includes, but is not limited to, a satellite communication RF transceiver chip (satellite communication transceiver), a satellite communication baseband chip, etc.

[0051] See also Figure 5 The satellite communication module 30 is configured to transmit a satellite communication signal during a first time period t1 via the switch unit 20 and the antenna radiator 10. The satellite communication signal transmission path includes the signal transmission end of the satellite communication module 30, the second end 20b of the switch unit 20, and the antenna radiator 10. This satellite communication signal transmission path is a simplified path; the specific satellite communication signal transmission path will be described in detail later.

[0052] See also Figure 5The satellite communication module 30 is further configured to receive a satellite communication signal during a second time period t2 via the third terminal 20c of the switch unit 20 and the antenna radiator 10. The satellite communication signal receiving path includes the antenna radiator 10, the third terminal 20c of the switch unit 20, and the signal receiving end of the satellite communication module 30. This satellite communication signal receiving path is a simplified path, and the specific satellite communication signal receiving path will be described in detail later.

[0053] See also Figure 4 The signal receiving end of the GNSS module 40 is electrically connected to the third end 20c of the switch unit 20. The GNSS module 40 is configured to receive GNSS signals during the second time period t2 via the third end 20c of the switch unit 20 and the antenna radiator 10. The GNSS module 40 includes, but is not limited to, a GNSS RF transceiver chip (GNSS transceiver), a GNSS baseband chip, and the like. The receiving path of the GNSS module 40 includes the antenna radiator 10, the third end 20c of the switch unit 20, and the signal receiving end of the GNSS module 40. This GNSS signal receiving path is a simplified path, and the specific GNSS signal receiving path will be described in detail later.

[0054] In the prior art, the GNSS system and satellite communications cannot coexist. That is, when satellite communications are activated, the GNSS coordinates cannot be obtained. For example, in the initial state, when longitude and latitude are needed for rescue purposes, the user's coordinate information cannot be obtained, which causes inconvenience. In addition, for the GNSS system, an additional antenna radiator 10 is required to implement this function. Obviously, this cost is not conducive to product needs. In addition, the GNSS antenna itself needs to have a strong gain in the upper hemisphere of the antenna. The satellite communication antenna also requires this upper hemisphere gain. Due to the limited space of the electronic device 1000 and the need to consider the isolation between the GNSS antenna and the satellite communication antenna, it is difficult to achieve high upper hemisphere gain and good isolation for both the GNSS antenna and the satellite communication antenna in the electronic device 1000.

[0055] In this application, the satellite communication receiving frequency band is close to some operating frequency bands in the GNSS system, creating conditions for simultaneous reception of the satellite communication receiving band and the GNSS receiving band. The satellite communication transmit and receive bands use a time division duplication (TDD) method. The satellite communication transmit path and receive path are separated in time to effectively prevent the high signal power of the satellite communication transmit band from affecting the devices in the GNSS signal receiving path.

[0056] The GNSS signal reception path and the satellite communication signal reception path share antenna radiator 10 and switch unit 20. Compared to providing separate GNSS and satellite antenna radiators, this reduces the number of radiators, saves costs, eliminates the need to consider isolation between the GNSS and satellite antenna radiators, and reduces the space occupied by the radiators for receiving GNSS and satellite communication signals on the frame of electronic device 1000, freeing up space for other antennas and enabling electronic device 1000 to support more antenna frequency bands.

[0057] In addition, since the satellite communication module 30 transmits a satellite communication transmission signal in the first time period t1, the satellite communication module 30 and the GNSS module 40 simultaneously receive the satellite communication reception signal and the GNSS reception signal in the second time period t2, thereby achieving a state in which satellite communication and GNSS support simultaneous operation under a single antenna. GNSS signals and satellite communication signals are received simultaneously (i.e., GNSS signals and satellite communication signals coexist) to enable positioning information to be obtained when satellite communication is started, and to be provided to rescue personnel in a timely manner. Positioning is also updated in real time during the use of satellite communication. Compared with the implementation method of switching between satellite communication and GNSS signals, this application can avoid the lag in positioning signal updates when performing satellite communication, and has higher practicality.

[0058] The RF front-end circuit 100 and electronic device 1000 provided in the present application are designed such that the first end 20a of the switch unit 20 is electrically connected to the antenna radiator 10, the signal transmitting end of the satellite communication module 30 is electrically connected to the second end 20b of the switch unit 20, and the signal receiving end of the satellite communication module 30 is electrically connected to the third end 20c of the switch unit 20. These devices are configured to transmit satellite communication transmission signals through the switch unit 20 and the antenna radiator 10 in a first time period t1, and receive satellite communication reception signals through the third end 20c of the switch unit 20 and the antenna radiator 10 in a second time period t2. The signal receiving end of the GNSS module 40 is electrically connected to the third end 20c of the switch unit 20, and is configured to receive GNSS reception signals through the third end 20c of the switch unit 20 and the antenna radiator 10 in a second time period t2. In this way, a single antenna radiator 10 can simultaneously support the transmission of satellite communication signals and the simultaneous reception of satellite communication frequency bands and GNSS frequency bands, thereby reducing the space occupied by the satellite communication module 30 and other antennas, reducing costs, improving the multiplexing rate of the RF front-end circuit 100, and realizing real-time updating of positioning information during satellite communication.

[0059] Optional, see Figure 6The RF front-end circuit 100 further includes a first low-noise amplifier (LNA1). The first low-noise amplifier (LNA1) is electrically connected to the third terminal 20c of the switch unit 20, the signal receiving terminal of the satellite communication module 30, and the signal receiving terminal of the GNSS module 40. Furthermore, the signal input terminal of the first low-noise amplifier (LNA1) is electrically connected to the third terminal 20c of the switch unit 20. The output terminal of the first low-noise amplifier (LNA1) is directly or indirectly electrically connected to the signal receiving terminal of the satellite communication module 30 and the signal receiving terminal of the GNSS module 40, so as to transmit the signals received from the antenna radiator 10 (including satellite communication signals and GNSS signals) to the signal receiving terminals of the satellite communication module 30 and the GNSS module 40. The first low-noise amplifier (LNA1) is used to amplify the signals received from the antenna radiator 10 (including satellite communication signals and GNSS signals).

[0060] In the first alternative embodiment, see Figure 7 The RF front-end circuit 100 further includes a power splitter 50. The power splitter 50 is electrically connected to the first low-noise amplifier LNA1, the signal receiving end of the satellite communication module 30, and the signal receiving end of the GNSS module 40. The input end of the power splitter 50 is electrically connected to the signal output end of the first low-noise amplifier LNA1.

[0061] Power splitter 50 is configured to distribute the energy amplified by first low-noise amplifier LNA1 to the signal receiving end of satellite communication module 30 and the signal receiving end of GNSS module 40, so that the signal receiving end of satellite communication module 30 and the signal receiving end of GNSS module 40 can independently receive the energy received by antenna radiator 10. Furthermore, a first output end of power splitter 50 is electrically connected to the signal receiving end of satellite communication module 30, and a second output end of power splitter 50 is electrically connected to the signal receiving end of GNSS module 40.

[0062] Optionally, the operating frequency band of the antenna radiator 10 covers at least 1.5-1.6 GHz, so that the antenna radiation can receive a wider range of 1.5-1.6 GHz frequency bands, for example, GPS-L1, the fourth-generation receiving band of the Inmarsat satellite, the receiving band of the Schuyler satellite, the B1 band of the Beidou satellite, etc. In other words, the resonant frequency of the antenna radiator 10 is located in the range of 1.5-1.6 GHz, and the radiation frequency band of the antenna radiator 10 covers 1.5-1.6 GHz. Of course, the above 1.5-1.6 GHz frequency band is an example frequency band. In other embodiments, the operating frequency band of the antenna radiator 10 can also be other frequency bands.

[0063] Furthermore, the power splitter 50 includes, but is not limited to, a one-to-two equal power splitter. The power splitter 50 is configured to equally distribute the energy amplified by the first low-noise amplifier LNA1 to the signal receiving end of the satellite communication module 30 and the signal receiving end of the GNSS module 40, so that the satellite communication module 30 and the GNSS module 40 receive equal amounts of energy. Of course, in other embodiments, the power splitter 50 includes, but is not limited to, a one-to-two unequal power splitter. For example, the energy received by the satellite communication module 30 may be greater than the energy received by the GNSS module 40, or the energy received by the satellite communication module 30 may be less than the energy received by the GNSS module 40.

[0064] In an optional implementation, see Figure 8 , the RF front-end circuit 100 also includes a third filter SW3. The third filter SW3 is electrically connected between the power divider 50 and the signal receiving end of the satellite communication module 30. The third filter SW3 is used to filter out the satellite communication receiving signal from the signal output by the power divider 50 to the signal receiving end of the satellite communication module 30, and transmit the satellite communication receiving signal to the signal receiving end of the satellite communication module 30. In other words, the third filter SW3 is used to allow the satellite communication receiving frequency band to pass through and block the GNSS receiving frequency band from passing through, so that the signal input end of the satellite communication module 30 receives the satellite communication receiving frequency band. For example, in the GNSS system, the center frequency of GPS-L1 is 1575.42MHz (within a range of plus or minus 10MHz), and the center frequency of the BeiDou-2 B1 frequency band is 1561.098MHz. The third filter SW3 obtains the satellite communication receiving frequency band through frequency screening.

[0065] The specific structure of the third filter SW3 is not described in this application. Optionally, the third filter SW3 includes components such as capacitors and inductors. The circuit in the third filter SW3 is a bandpass circuit for the satellite communication reception frequency band, and the circuit in the third filter SW3 is a bandstop circuit for the GNSS reception frequency band.

[0066] In a further alternative embodiment, see Figure 9The RF front-end circuit 100 also includes a second low-noise amplifier (LNA2). The second low-noise amplifier (LNA2) is electrically connected between the power divider 50 and the signal receiving end of the satellite communication module 30. Furthermore, the second low-noise amplifier (LNA2) is electrically connected between the power divider 50 and the third filter SW3. The second low-noise amplifier (LNA2) is used to further amplify the signal output from the power divider 50 to the signal receiving end of the satellite communication module 30, compensating for signal loss from the power divider 50. The third filter SW3 is used to filter out the satellite communication reception signal from the signal output from the second low-noise amplifier (LNA2) to the signal receiving end of the satellite communication module 30 and transmit the satellite communication reception signal to the signal receiving end of the satellite communication module 30. The signal in the satellite communication reception frequency band undergoes primary amplification by the first low-noise amplifier (LNA1) and secondary amplification by the second low-noise amplifier (LNA2), enabling the satellite communication module 30 to receive a strong satellite communication reception signal.

[0067] Optional, see Figure 9 In the GNSS receiving path, the RF front-end circuit 100 also includes a first filter SW1, a third low-noise amplifier LNA3, and a second filter SW2. The first filter SW1 is electrically connected between the power divider 50 and the third low-noise amplifier LNA3. The first filter SW1 is used to filter out the GNSS receiving signal from the signal output from the power divider 50 to the signal receiving end of the GNSS module 40, and transmit the GNSS receiving signal to the signal receiving end of the GNSS module 40. In other words, the first filter SW1 is used to allow the GNSS receiving frequency band to pass through and block the satellite communication receiving frequency band from passing through, so that the signal input end of the GNSS module 40 receives the GNSS receiving frequency band. For example, in the GNSS system, the center frequency of GPS-L1 is 1575.42MHz (within a range of plus or minus 10MHz), and the center frequency of the BeiDou-2 B1 frequency band is 1561.098MHz. The first filter SW1 obtains the GNSS receiving frequency band through frequency screening.

[0068] The specific structure of the first filter SW1 is not described in this application. Optionally, the first filter SW1 includes components such as capacitors and inductors. The circuit in the first filter SW1 is a band-stop circuit for the satellite communication reception frequency band, and the circuit in the first filter SW1 is a band-pass circuit for the GNSS reception frequency band.

[0069] The third low-noise amplifier LNA3 is electrically connected between the first filter SW1 and the second filter SW2 to amplify the GNSS receive signal output by the first filter SW1. The second filter SW2 is electrically connected between the third low-noise amplifier LNA3 and the signal receiving terminal of the GNSS module 40 to further filter the GNSS receive signal and transmit the GNSS receive signal to the signal receiving terminal of the GNSS module 40.

[0070] The specific structure of the second filter SW2 is not described in this application. Optionally, the second filter SW2 includes components such as capacitors and inductors. The circuit in the second filter SW2 is a band-stop circuit for the satellite communication reception frequency band, and the circuit in the second filter SW2 is a band-pass circuit for the GNSS reception frequency band.

[0071] In this embodiment, a power splitter 50 is provided to distribute the received signal amplified by the first low-noise amplifier LNA1 to the signal receiving end of the satellite communication module 30 and the signal receiving end of the GNSS module 40, enabling the satellite communication module 30 and the GNSS module 40 to receive signals simultaneously without mutual signal interference. The signal output by the power splitter 50 is filtered by a third filter SW3 to output signals in the satellite communication receive frequency band to the receiving end of the satellite communication module 30. The signal output by the power splitter 50 is further amplified by a second low-noise amplifier LNA2 to compensate for signal loss caused by the power splitter 50. The signal output by the power splitter 50 is filtered by the first filter SW1, the third low-noise amplifier LNA3, and the second filter SW2 to amplify and output signals in the GNSS receive frequency band to the receiving end of the GNSS module 40.

[0072] In a second alternative embodiment, see Figure 10 The RF front-end circuit 100 further includes a dual-channel filter SW4. An input end of the dual-channel filter SW4 is electrically connected to the first low-noise amplifier LNA1. A first output end of the dual-channel filter SW4 is electrically connected to a signal receiving end of the satellite communication module 30. A second output end of the dual-channel filter SW4 is electrically connected to a signal receiving end of the GNSS module 40, thereby outputting signals in the satellite communication receiving frequency band to the signal receiving end of the satellite communication module 30 and signals in the GNSS receiving frequency band to the signal receiving end of the GNSS module 40, respectively.

[0073] Optional, see Figure 11 The two-channel filter SW4 includes a first bandpass circuit D1 and a second bandpass circuit D2. The input of the first bandpass circuit D1 is electrically connected to the input of the second bandpass circuit D2, forming the input of the two-channel filter SW4. The output of the first bandpass circuit D1 serves as the first output of the two-channel filter SW4. The output of the second bandpass circuit D2 serves as the second output of the two-channel filter SW4.

[0074] The first bandpass circuit D1 is electrically connected between the signal receiving end of the satellite communication module 30 and the first low-noise amplifier LNA1. The first bandpass circuit D1 is configured to allow satellite communication signals to pass through while blocking GNSS signals. It also functions as a satellite communication filter. This application does not describe the specific structure of the first bandpass circuit D1; however, the first bandpass circuit D1 may optionally include components such as capacitors and inductors. The circuitry within the first bandpass circuit D1 functions as a bandpass circuit for the satellite communication reception frequency band and as a bandstop circuit for the GNSS reception frequency band.

[0075] The second bandpass circuit D2 is electrically connected between the signal receiving terminal of the GNSS module 40 and the first low-noise amplifier LNA1. The second bandpass circuit D2 is configured to allow GNSS receive signals to pass through while blocking satellite communication receive signals. The second bandpass circuit D2 also functions as a GNSS filter. The specific structure of the second bandpass circuit D2 is not described herein; however, the second bandpass circuit D2 may optionally include components such as capacitors and inductors. The circuitry within the second bandpass circuit D2 functions as a band-stop circuit for the satellite communication receive frequency band and as a band-pass circuit for the GNSS receive frequency band.

[0076] In this implementation, please refer to Figure 10 and Figure 11 In the GNSS receive path, the RF front-end circuit 100 further includes a third low-noise amplifier (LNA3) and a second filter (SW2). The third low-noise amplifier (LNA3) is the same as the third low-noise amplifier (LNA3) described in the aforementioned embodiment. The second filter (SW2) is the same as the second filter (SW2) described in the aforementioned embodiment. The third low-noise amplifier (LNA3) is electrically connected to the second bandpass circuit (D2). The second filter (SW2) is electrically connected between the third low-noise amplifier (LNA3) and the signal receiving terminal of the GNSS module 40.

[0077] In this embodiment, a dual-channel filter SW4 is provided to separate the received signal amplified by the first low-noise amplifier LNA1, outputting the satellite communication receive frequency band to the signal receiving terminal of the satellite communication module 30 and the GNSS receive frequency band to the signal receiving terminal of the GNSS module 40. This allows the satellite communication module 30 and the GNSS module 40 to receive signals simultaneously without mutual signal interference. A third low-noise amplifier LNA3 and a second filter SW2 are provided to filter the signal output from the power splitter 50, amplifying the signal in the GNSS receive frequency band and outputting it to the receiving terminal of the GNSS module 40. In this embodiment, the power splitter 50 and the second low-noise amplifier LNA2 are not required, reducing the number of components, saving costs, and reducing the size of the RF front-end circuit 100.

[0078] In conjunction with any of the above implementations, please refer to Figures 6-11 In the transmission path of the satellite transmission frequency band, the RF front-end circuit 100 also includes a power amplifier PA. The power amplifier PA is electrically connected between the signal transmission terminal of the satellite communication module 30 and the second terminal 20b of the switch unit 20. The power amplifier PA is used to amplify the satellite communication transmission signal transmitted by the satellite communication module 30, thereby facilitating high-power transmission within the satellite communication frequency band. The power amplifier PA provides strong support for signal transmission of the entire satellite system.

[0079] Optional, see Figure 12 The first time period t1 is the transmission time period of the satellite frequency band, and the second time period t2 is the reception time period for satellite communications and the reception time period for GNSS. Furthermore, a satellite protection time (third time period t3) is provided between the transmission time period and the reception time period for satellite communications to prevent overlap between the reception time and the transmission time for satellite communications. The GNSS module 40 is further configured to receive GNSS receive signals during the third time period t3. The third time period t3 is between the end time of the last satellite communications receive signal received by the satellite communications module 30 and the start time of the next satellite communications transmit signal transmitted by the satellite communications module 30.

[0080] The satellite protection time (the third time period t3) is between the end time when the satellite communication module 30 receives the satellite communication reception signal last time and the start time when the satellite communication module 30 transmits the satellite communication transmission signal next time, to avoid the reception time and transmission time of the satellite communication from overlapping. Of course, the third time period t3 can also be between the end time when the satellite communication module 30 transmits the satellite communication transmission signal and the start time when the satellite communication module 30 receives the satellite communication reception signal.

[0081] When the amount of GNSS data downloaded is large, at least a portion of the third time period t3 may be used as a satellite communication reception time period and a GNSS reception time period. Specifically, the processor in electronic device 1000 determines whether the amount of GNSS data downloaded is greater than a preset download data amount. If the amount of GNSS data downloaded is greater than the preset download amount, a portion of the timing in the third time period t3 is used as a satellite communication reception time period and a GNSS reception time period. If the amount of GNSS data downloaded is less than or equal to the preset download amount, a portion of the timing in the third time period t3 is not used as a satellite communication reception time period and a GNSS reception time period.

[0082] If the processor in the electronic device 1000 determines that the GNSS signal reception fails within the second time period t2, the processor in the electronic device 1000 may use at least a portion of the third time period t3 as a satellite communication reception time period and a GNSS reception time period.

[0083] Optional, see Figure 13 The RF front-end circuit 100 further includes a matching circuit M. The matching circuit M is electrically connected between the antenna radiator 10 and the first end 20a of the switch unit 20. The matching circuit M includes at least one of a capacitor and an inductor. The matching circuit M adjusts the impedance matching of the antenna radiator 10 to facilitate excitation of a resonant mode on the antenna radiator 10.

[0084] During the satellite communication signal transmission phase, the first end 20a and the second end 20b of the switch unit 20 are conductive, while the first end 20a and the third end 20c of the switch unit 20 are disconnected. The matching circuit M tunes the impedance of the antenna radiator 10 to match the antenna radiator 10, thereby exciting a resonant mode supporting the satellite communication transmission frequency band. During the satellite communication signal reception phase and the GNSS signal reception phase, the first end 20a and the second end 20b of the switch unit 20 are disconnected, while the first end 20a and the third end 20c of the switch unit 20 are conductive. The matching circuit M tunes the impedance of the antenna radiator 10 to match the antenna radiator 10, thereby exciting a resonant mode supporting the satellite communication transmission frequency band and the GNSS signal reception phase.

[0085] Optional, see Figure 14 The matching circuit M includes a matching switch K1, a first matching branch M1, and a second matching branch M2. The first matching branch M1 includes, but is not limited to, a ground inductor and a ground capacitor, and the second matching branch M2 includes, but is not limited to, a ground inductor or a ground capacitor. The matching switch K1 switches from the first matching branch M1 to the second matching branch M2, enabling the antenna radiator 10 to switch from a relatively high transmit frequency band to a relatively low receive frequency band.

[0086] Optional, see Figure 15 , the first matching branch M1 is a first grounding inductor, and the second matching branch M2 is a second grounding inductor. Wherein, the inductance value of the second grounding inductor is less than the inductance value of the first grounding inductor. Alternatively, please refer to Figure 16 The first matching branch M1 is open circuit, and the second matching branch M2 is a grounded capacitor. When the matching switch K1 switches to the second matching branch M2, the frequency band supported by the antenna radiator 10 shifts toward a lower frequency, enabling the antenna radiator 10 to switch from a relatively high transmit frequency band to a relatively low receive frequency band.

[0087] When the switch unit 20 is configured so that the first end 20a and the second end 20b are turned on, the first end 20a and the third end 20c of the switch unit 20 are disconnected. At the same time, the matching switch K1 is configured to turn on the electrical connection between the first matching branch M1 and the antenna radiator 10, so as to achieve impedance matching of the antenna radiator 10, thereby generating a resonant mode that supports the satellite communication transmission frequency band.

[0088] When the switch unit 20 is configured to conduct the first end 20a and the third end 20c, the first end 20a and the second end 20b of the switch unit 20 are disconnected. At the same time, the matching switch K1 is configured to conduct the electrical connection between the second matching branch M2 and the antenna radiator 10, so as to achieve impedance matching of the antenna radiator 10, thereby generating a resonant mode that supports the satellite communication receiving frequency band and the GNSS receiving frequency band.

[0089] Optional, see Figure 17 The switch unit 20 may include two switch transistors, including but not limited to transistors, triodes, or CMOS transistors. Furthermore, the two switch transistors include but are not limited to a first N-type transistor T1 and a first P-type transistor T2. The gate of the first N-type transistor T1 and the gate of the first P-type transistor T2 are electrically connected to receive a pulse signal. When the same pulse signal is applied, the first N-type transistor T1 can be turned on (turning on the first terminal 20a and the second terminal 20b of the switch unit 20), and the first P-type transistor T2 can be turned off (disconnecting the first terminal 20a and the third terminal 20c of the switch unit 20).

[0090] Optional, see Figure 17 The matching switch K1 may include two switching transistors, including but not limited to transistors, triodes, or CMOS transistors. Furthermore, the two switching transistors may include but are not limited to a second N-type transistor T3 and a second P-type transistor T4. The gates of the first N-type transistor T1, the first P-type transistor T2, the second N-type transistor T3, and the second P-type transistor T4 are all electrically connected to the controller 70 to receive a pulse signal. Consequently, the same pulse signal simultaneously drives the first N-type transistor T1 to turn on (connecting the first and second terminals 20a and 20b of the switch unit 20), the second N-type transistor T3 to turn on (connecting the antenna radiator 10 and the first matching branch M1), and the first P-type transistor T2 to turn off (disconnecting the first and third terminals 20a and 20c of the switch unit 20), and the second P-type transistor T4 to turn off (disconnecting the antenna radiator 10 and the second matching branch M2). This achieves coordinated operation between the switch unit 20 and the matching switch K1, causing the switch unit 20 and the matching switch K1 to simultaneously switch to the satellite communication transmission phase or the satellite communication + GNSS reception phase.

[0091] When the satellite communication of the electronic device 1000 is turned off, that is, the satellite communication module 30 is turned off, the RF front-end circuit 100 can still independently receive the GNSS signal.

[0092] Optional, see Figure 18The RF front-end circuit 100 also includes a cellular mobile communication module 80. The switch unit 20 also includes a fourth terminal 20e and a fifth terminal 20f. The signal transmitting terminal of the cellular mobile communication module 80 is electrically connected to the fourth terminal 20e of the switch unit 20. The signal receiving terminal of the cellular mobile communication module 80 is electrically connected to the fifth terminal 20f of the switch unit 20. The cellular mobile communication module 80 is used to transmit and receive cellular mobile communication signals through the switch unit 20 and the antenna radiator 10. Specifically, when the satellite communication module 30 is operating, the cellular mobile communication module 80 is in a closed state to ensure that the satellite communication signal is transmitted at a higher power. When the cellular mobile communication module 80 is operating, the satellite communication module 30 is in a closed state.

[0093] The cellular mobile communication module 80, satellite communication module 30 and GNSS module 40 provided in the embodiment of the present application are controlled by the switch unit 20, and all transmit and receive signals through the antenna radiator 10. Compared with separately setting up the GNSS antenna radiator, satellite antenna radiator and cellular mobile radiator, the number of radiators is reduced, the cost is saved, and there is no need to consider the isolation problem between the GNSS antenna radiator, satellite antenna radiator and cellular mobile radiator. The space occupied by the radiator for receiving GNSS signals, satellite communication signals and cellular mobile signals on the frame of the electronic device 1000 is reduced, freeing up more space for other antennas, so that the electronic device 1000 can support more antenna frequency bands.

[0094] Optional, see Figure 19 The cellular mobile communication module 80, satellite communication module 30, and GNSS module 40 are electrically connected to the switch unit 20 (the third end 20c thereof) via a three-way power splitter, enabling independent transmission of satellite communication signals, simultaneous reception of GNSS and satellite communication signals, and independent transmission and reception of cellular mobile communication signals. In this case, a power amplifier (PA) can be provided in the transmission path between the cellular mobile communication module 80 and the three-way power splitter. A low-noise amplifier and filter can be provided in the reception path between the cellular mobile communication module 80 and the three-way power splitter.

[0095] Optional, see Figure 20 The cellular mobile communication module 80, satellite communication module 30, and GNSS module 40 are electrically connected to the switch unit 20 (third end 20c) via the three-channel filter SW5, enabling independent transmission of satellite communication signals, simultaneous reception of GNSS and satellite communication signals, and independent transmission and reception of cellular mobile communication signals. In this case, a power amplifier PA' can be provided in the transmission path between the cellular mobile communication module 80 and the three-channel filter SW5. A low-noise amplifier LNA' can be provided in the reception path between the cellular mobile communication module 80 and the three-channel filter SW5, and a filter SW' can also be provided.

[0096] The following provides specific examples of several architectural designs of the RF front-end circuit 100 .

[0097] One embodiment of the present application proposes a method of separating satellite communication signals from GNSS signals through a power divider 50 design, and the power divider 50 is used to transmit the signal (including satellite communication signals and GNSS signals) after being amplified by the first low-noise amplifier LNA1, so as to achieve a state in which a single antenna radiator 10 supports the simultaneous operation of satellite communication signals and GNSS signals.

[0098] See also Figure 8 and Figure 9 , Figure 8 The RF front-end circuit 100 includes a switch unit 20, a power amplifier PA, a satellite communication module 30, a first low noise amplifier LNA1, a power divider 50, and a third filter SW3 (see FIG. Figure 9 ), the first filter SW1 (see Figure 9 ), the third low noise amplifier LNA3 (see Figure 9 ) and the second filter SW2 (see Figure 9 ), GNSS module 40.

[0099] The signal transmission and reception process in this embodiment includes but is not limited to the following steps.

[0100] 1) The transmission signal of the satellite communication module 30 passes through the power amplifier PA and is output from the front-end switch unit 20 to the antenna radiator 10.

[0101] 2) The receiving signal of the satellite communication module 30 and the GNSS receiving signal are received from the antenna radiator 10 and then enter the first low noise amplifier LNA1 at the rear end through the switch unit 20 .

[0102] 3) The satellite communication reception signal and the GNSS reception signal are amplified by the first low noise amplifier LNA1 at the back end (the broadband first low noise amplifier LNA1 supports the frequency range of satellite communication and GNSS).

[0103] 4) After being amplified, the GNSS receiving signal and the satellite communication receiving signal are evenly divided into half by the power divider 50 to the satellite communication module 30 and the GNSS module 40 respectively.

[0104] 5) The satellite communication reception signal passes through the corresponding third filter SW3 and is output to the satellite transceiver of the satellite communication module 30.

[0105] 6) The GNSS receiving signal passes through the corresponding first filter SW1 and then is converted by the third low noise amplifier LNA3

[0106] The GNSS received signal is further amplified and output, and then filtered by the second filter SW2 before entering the GNSS transceiver of the GNSS module 40 .

[0107] See also Figure 12 , Figure 12 This is a timing design diagram of the operation of the RF front-end circuit 100 in an embodiment of the present application. Satellite communication is a time-division method, in which TX (transmission) and reception (RX) do not occur at the same time, and there is a protection gap between the two to avoid the transmission time period and the reception time period from coinciding. In the timing design of the embodiment of the present application, the reception timing of GNSS is aligned with the reception timing of satellite communication to achieve simultaneous reception of GNSS signals and satellite communication signals. In the case of insufficient resources, the protection timing of the satellite can also be provided to GNSS to ensure that the GNSS signal has sufficient resources.

[0108] See also Figure 21 , Figure 21 1 is a signal transmission and reception block diagram of an electronic device 1000 provided in an embodiment of the present application. The satellite communication module 30 in the electronic device 1000 transmits a satellite communication transmission signal, and the satellite communication module 30 and the GNSS module 40 simultaneously receive satellite communication reception signals and GNSS reception signals, thereby enabling real-time updates of the positioning information of the electronic device 1000 during satellite communication.

[0109] The above embodiment provides a technology for achieving coexistence of GNSS receiving signals and satellite communication receiving signals under a common antenna radiator 10, so as to provide real-time positioning information in the case of a satellite communication module 30. Compared with the implementation method in which the GNSS antenna radiator and the satellite communication antenna radiator 10 are independently arranged, this embodiment can save costs and reduce the area occupied by the radiator.

[0110] See also Figure 9 , Figure 9 FIG1 is a circuit block diagram of an RF front-end circuit 100 according to another embodiment of the present application. The RF front-end circuit 100 includes an antenna radiator 10, a switch unit 20, a power amplifier PA, a satellite communication module 30, a first low-noise amplifier LNA1, a power splitter 50, a second low-noise amplifier LNA2, a third filter SW3, a first filter SW1, a third low-noise amplifier LNA3, a second filter SW2, and a GNSS module 40.

[0111] The signal transmission and reception process in this embodiment includes but is not limited to the following steps.

[0112] 1) The transmission signal of the satellite communication module 30 passes through the power amplifier PA and is output from the front-end switch unit 20 to the antenna radiator 10.

[0113] 2) The receiving signal of the satellite communication module 30 and the GNSS receiving signal are received from the antenna radiator 10 and then enter the first low noise amplifier LNA1 at the rear end through the switch unit 20 .

[0114] 3) The satellite communication reception signal and the GNSS reception signal are amplified by the first low noise amplifier LNA1 at the back end (the broadband first low noise amplifier LNA1 supports the frequency range of satellite and GNSS).

[0115] 4) After being amplified, the GNSS receiving signal and the satellite communication receiving signal are evenly divided into half by the power divider 50 to the satellite communication module 30 and the GNSS module 40 respectively.

[0116] 5) The satellite communication received signal passes through the third low noise amplifier LNA3 of the second stage and then through the corresponding third filter SW3 before being output to the satellite transceiver of the satellite communication module 30.

[0117] 6) The GNSS received signal passes through the first filter SW1 and is further amplified and output by the second low noise amplifier LNA2 . After being filtered by the second filter SW2 , the signal enters the GNSS transceiver of the GNSS module 40 .

[0118] The above embodiment not only enables simultaneous operation of satellite communication and GNSS, providing users with the experience of updating their geographic location while on a call, but also further reduces the loss of the amplified signal caused by the power splitter 50 by providing a third low-noise amplifier LNA3 between the satellite communication module 30 and the power splitter 50 to further amplify the received satellite communication signal. By adding a second low-noise amplifier for amplification, the loss of the satellite communication signal caused by the power splitter 50 is reduced.

[0119] See also Figure 10 , Figure 10 FIG1 is a circuit block diagram of a radio frequency front-end circuit 100 according to another embodiment of the present application. The radio frequency front-end circuit 100 includes an antenna radiator 10, a switch unit 20, a power amplifier PA, a satellite communication module 30, a first low-noise amplifier LNA1, a dual-SAW filter SW4, a third low-noise amplifier LNA3, a second filter SW2, and a GNSS module 40.

[0120] The signal transmission and reception process in this embodiment includes but is not limited to the following steps.

[0121] 1) The transmission signal of the satellite communication module 30 passes through the power amplifier PA and is output from the front-end switch unit 20 to the antenna radiator 10.

[0122] 2) The receiving signal of the satellite communication module 30 and the GNSS receiving signal are received from the antenna radiator 10 and then enter the first low noise amplifier LNA1 at the rear end through the switch unit 20 .

[0123] 3) The satellite communication reception signal and the GNSS reception signal are amplified by the first low noise amplifier LNA1 at the back end (the broadband first low noise amplifier LNA1 supports the frequency range of satellite and GNSS).

[0124] 4) The amplified GNSS receiving signal and the satellite communication receiving signal can be separated from the satellite communication receiving signal by a dual-channel filter SW4.

[0125] 5) The signal output from the satellite filter output end of the dual-channel filter SW4 finally reaches the satellite transceiver of the satellite communication module 30.

[0126] 6) The GNSS received signal passes through the GNSS filter corresponding to the dual-channel filter SW4 and is further amplified and output by the third low noise amplifier LNA3 supporting GNSS amplification. The signal is filtered by the second filter SW2 and enters the GNSS transceiver of the GNSS module 40.

[0127] The above embodiment achieves separation of satellite communication reception signals and GNSS reception signals by combining the satellite filter and the GNSS filter into a dual-channel filter SW4, while also ensuring that the satellite communication reception signals and the GNSS reception signals work simultaneously. Since there is no need to set up a power divider 50, the cost and the occupied area can be reduced.

[0128] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application, and these improvements and modifications are also considered to be within the scope of protection of the present application.

Claims

1. A radio frequency front-end circuit, characterized in that: include: a switch unit, the switch unit comprising a first end, a second end, and a third end, wherein the first end is used to electrically connect to the antenna radiator; a satellite communication module, wherein a signal transmitting end of the satellite communication module is electrically connected to the second end of the switch unit, and a signal receiving end of the satellite communication module is electrically connected to the third end of the switch unit, and is configured to transmit a satellite communication transmission signal through the switch unit and the antenna radiator in a first time period, and receive a satellite communication reception signal through the third end of the switch unit and the antenna radiator in a second time period; and A global satellite navigation system GNSS module, wherein the signal receiving end of the GNSS module is electrically connected to the third end of the switch unit, and is used to receive the GNSS receiving signal in the second time period through the third end of the switch unit and the antenna radiator.

2. The radio frequency front-end circuit according to claim 1, wherein: The RF front-end circuit also includes a first low-noise amplifier, which is electrically connected to the third end of the switch unit, the signal receiving end of the satellite communication module, and the signal receiving end of the GNSS module. The first low-noise amplifier is used to amplify the satellite communication receiving signal and the GNSS receiving signal.

3. The radio frequency front-end circuit according to claim 2, wherein: The RF front-end circuit also includes a power splitter, which is electrically connected to the first low-noise amplifier, the signal receiving end of the satellite communication module, and the signal receiving end of the GNSS module. The power splitter is used to distribute the energy amplified by the first low-noise amplifier to the signal receiving end of the satellite communication module and the signal receiving end of the GNSS module.

4. The radio frequency front-end circuit according to claim 3, wherein: The RF front-end circuit also includes a fourth filter, which is electrically connected between the power splitter and the signal receiving end of the satellite communication module. The fourth filter is used to filter out the satellite communication reception signal from the signal output by the power splitter to the signal receiving end of the satellite communication module, and transmit the satellite communication reception signal to the signal receiving end of the satellite communication module.

5. The radio frequency front-end circuit according to claim 3, wherein: The RF front-end circuit also includes a second low-noise amplifier, which is electrically connected between the power divider and the signal receiving end of the satellite communication module. The second low-noise amplifier is used to amplify the signal output to the signal receiving end of the satellite communication module via the power divider.

6. The radio frequency front-end circuit according to any one of claims 3 to 5, wherein: The RF front-end circuit also includes a first filter, a third low-noise amplifier and a second filter. The first filter is electrically connected to the power divider, the third low-noise amplifier is electrically connected to the first filter, and the second filter is electrically connected between the third low-noise amplifier and the signal receiving end of the GNSS module.

7. The radio frequency front-end circuit according to claim 2, wherein: The RF front-end circuit also includes a dual-channel filter, an input end of the dual-channel filter is electrically connected to the first low-noise amplifier, a first output end of the dual-channel filter is electrically connected to the signal receiving end of the satellite communication module, and a second output end of the dual-channel filter is electrically connected to the signal receiving end of the GNSS module.

8. The radio frequency front-end circuit according to claim 7, wherein: The dual-channel filter includes a first bandpass circuit and a second bandpass circuit, the first bandpass circuit being electrically connected between a signal receiving terminal of the satellite communication module and the first low-noise amplifier, the first bandpass circuit being configured to receive signals through the satellite communication and block the GNSS from receiving signals; The second bandpass circuit is electrically connected between the signal receiving terminal of the GNSS module and the first low noise amplifier, and is configured to be able to receive signals from the GNSS and block the satellite communication receiving signals.

9. The radio frequency front-end circuit according to claim 8, wherein: The RF front-end circuit further includes a third low-noise amplifier and a second filter. The third low-noise amplifier is electrically connected to the second bandpass circuit. The second filter is electrically connected between the third low-noise amplifier and the signal receiving end of the GNSS module.

10. The radio frequency front-end circuit according to any one of claims 1 to 5 and 7 to 9, wherein: The RF front-end circuit also includes a power amplifier, which is electrically connected between the signal transmitting end of the satellite communication module and the second end of the switch unit. The power amplifier is used to amplify the power of the satellite communication transmission signal transmitted by the satellite communication module.

11. The radio frequency front-end circuit according to any one of claims 1 to 5 and 7 to 9, wherein: The GNSS module is further configured to receive a GNSS reception signal in a third time period, where the third time period is between an end time when the satellite communication module last received a satellite communication reception signal and a start time when the satellite communication module next transmits a satellite communication transmission signal.

12. The radio frequency front-end circuit according to any one of claims 1 to 5 and 7 to 9, wherein: The RF front-end circuit also includes a matching circuit, which is electrically connected between the antenna radiator and the switch unit. The matching circuit includes a matching switch, a first matching branch, and a second matching branch. When the switch unit is configured so that the first end and the second end are conductive, the matching switch is configured to conduct the electrical connection between the first matching branch and the antenna radiator; when the switch unit is configured so that the first end and the third end are conductive, the matching switch is configured to conduct the electrical connection between the second matching branch and the antenna radiator.

13. The radio frequency front-end circuit according to any one of claims 1 to 5 and 7 to 9, wherein: The RF front-end circuit also includes a cellular mobile communication module, a signal transmitting end of the cellular mobile communication module and a signal receiving end of the cellular mobile communication module are electrically connected to the switch unit, and the cellular mobile communication module is used to send and receive cellular mobile communication signals through the switch unit and the antenna radiator.

14. The radio frequency front-end circuit according to claim 13, wherein: The cellular mobile communication module, the satellite communication module, and the GNSS module are electrically connected to the switch unit via a three-way power splitter or a three-channel filter.

15. An electronic device, characterized in that: The method comprises the radio frequency front-end circuit according to any one of claims 1 to 14, and an antenna radiator, wherein the first end of the switch unit is electrically connected to the antenna radiator.

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