Radio frequency system and electronic equipment

Abstract

The invention provides a radio frequency system and electronic equipment, the radio frequency system comprises a radiator, a first antenna switch, a first radio frequency transceiver module and a front end receiving module, the fixed end of the first antenna switch is electrically connected with the radiator; the front-end receiving module comprises a low-noise amplifier and a first combiner, one end of the low-noise amplifier is electrically connected with the first antenna switch, the other end of the low-noise amplifier is electrically connected with the input end of the first combiner, and the first output end of the first combiner is electrically connected with the first receiving port of the first radio frequency transceiver module; the first output end of the first combiner is electrically connected with the first receiving port of the first radio frequency transceiver module and used for transmitting the first frequency band to the first receiving port of the first radio frequency transceiver module, and the second output end of the first combiner is electrically connected with the second receiving port of the first radio frequency transceiver module and used for transmitting the second frequency band to the second receiving port of the first radio frequency transceiver module or the receiving port of the second radio frequency transceiver module. Receiving of the first frequency band and receiving of the second frequency band share the low-noise amplifier and the first combiner, the occupied space is reduced, and miniaturization is achieved.

Description

Technical Field

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

[0002] The current RF system needs to be configured with multiple transceiver channels and RF devices because it needs to transmit and receive multiple frequency bands. These transceiver channels and RF devices cause the RF system to occupy a larger space, increase the layout area of ​​the mainboard, and are not conducive to miniaturization. Therefore, how to reduce the space occupied by the RF system and achieve miniaturization has become a technical problem that needs to be solved. Summary of the invention

[0003] The present application provides a radio frequency system capable of reducing the occupied space and realizing miniaturization, and an electronic device having the radio frequency system.

[0004] In a first aspect, the present application provides a radio frequency system, comprising:

[0005] A radiator, the radiator is used to receive a first frequency band and a second frequency band;

[0006] a first antenna switch, wherein a fixed end of the first antenna switch is electrically connected to the radiator;

[0007] A first radio frequency transceiver module;

[0008] A front-end receiving module includes a low noise amplifier and a first combiner, wherein one end of the low noise amplifier is electrically connected to the first antenna switch, the other end of the low noise amplifier is electrically connected to the input end of the first combiner, the first output end of the first combiner is electrically connected to the first receiving port of the first RF transceiver module, and is used to transmit the first frequency band to the first receiving port of the first RF transceiver module, and the second output end of the first combiner is electrically connected to the second receiving port of the first RF transceiver module, and is used to transmit the second frequency band to the second receiving port of the first RF transceiver module or the receiving port of the second RF transceiver module.

[0009] The radio frequency system provided by the present application is designed to receive the first frequency band and the second frequency band by designing a radiator; the fixed end of the first antenna switch is electrically connected to the radiator, and the front-end receiving module includes a low-noise amplifier and a first combiner. One end of the low-noise amplifier is electrically connected to the radiator via the first antenna switch, and the other end of the low-noise amplifier is electrically connected to the input end of the first combiner. The first output end of the first combiner is electrically connected to the first receiving port of the first radio frequency transceiver module, which is used to send the first frequency band to the first receiving port of the first radio frequency transceiver module. The second output end of the first combiner is electrically connected to the second receiving port of the first radio frequency transceiver module, which is used to transmit the second frequency band to the second receiving port of the first radio frequency transceiver module or the receiving port of the second radio frequency transceiver module; in this way, the receiving channel of the first frequency band and the receiving channel of the second frequency band share the low-noise amplifier and the first combiner. Compared with the receiving channel of the first frequency band and the receiving channel of the second frequency band using two low-noise amplifiers respectively, one low-noise amplifier is saved, the number of components is reduced, the space occupied by the radio frequency system is reduced, and miniaturization is achieved.

[0010] The present application provides an electronic device, comprising the radio frequency system described in the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments are briefly introduced below.

[0012] Figure 1 is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application;

[0013] Figure 2 is a partial exploded schematic diagram of an electronic device provided in an embodiment of the present application;

[0014] Figure 3 is a partial schematic diagram of an electronic device provided by an embodiment of the present application with a back cover removed;

[0015] Figure 4 This is a structural frame of a radio frequency system provided in an embodiment of the present application. Figure 1 ;

[0016] Figure 5 This is a structural frame of a radio frequency system provided in an embodiment of the present application. Figure 2 ;

[0017] Figure 6 is a structural block diagram of a first combiner provided in an embodiment of the present application;

[0018] Figure 7 This is a structural frame of a radio frequency system provided in an embodiment of the present application. Figure 3 ;

[0019] Figure 8is a structural block diagram of a second combiner provided in an embodiment of the present application;

[0020] Fig. 9 This is a structural frame of a radio frequency system provided in an embodiment of the present application. Figure 4 ;

[0021] Fig.10 This is a structural frame of a radio frequency system provided in an embodiment of the present application. Figure 5 ;

[0022] Fig.11 This is a structural frame of a radio frequency system provided in an embodiment of the present application. Figure 6 ;

[0023] Fig.12 This is a structural frame of a radio frequency system provided in an embodiment of the present application. Figure 7 ;

[0024] Fig.13 This is a structural frame of a radio frequency system provided in an embodiment of the present application. Figure 8 ;

[0025] Fig.14 This is a structural frame of a radio frequency system provided in an embodiment of the present application. Figure 9 ;

[0026] Fig.15 This is a structural frame of a radio frequency system provided in an embodiment of the present application. Figure 10 ;

[0027] Fig.16 This is a structural frame of a radio frequency system provided in an embodiment of the present application. Figure 10 one;

[0028] Fig.17 This is a structural frame of a radio frequency system provided in an embodiment of the present application. Figure 10 two;

[0029] Fig.18 This is a structural frame of a radio frequency system provided in an embodiment of the present application. Figure 10 three;

[0030] Fig.19 This is a structural frame of a radio frequency system provided in an embodiment of the present application. Figure 10 Four;

[0031] Fig. 20 This is a structural frame of a radio frequency system provided in an embodiment of the present application. Figure 10 five.

[0032] Description of some figures:

[0033] Electronic device 1000; RF system 100; display screen 200; middle frame 300; back cover 400; middle plate 310; frame 320; main circuit board 600; battery 700; sub-board 800; first RF transceiver module 10; front-end receiving module 20; first antenna switch 40; radiator 50; low noise amplifier 21; first combiner 22; second receiving port 10b; second RF transceiver module 12; second combiner 23; third branch 231; fourth branch 232; signal distribution element 24; third RF transceiver module 13; power divider 241; first power branch 2411; second power branch 2412; first sub-switch 242; front-end transmitting module 30; filter 31; first DC blocking capacitor 325; power amplifier 32; second DC blocking capacitor 327; power supply 61; boost module 62; fourth RF transceiver module 14; second antenna switch 15; fifth RF transceiver module 16. DETAILED DESCRIPTION

[0034] The technical solution of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the embodiments described in the present application are only a part of the embodiments, not all of the embodiments. Based on the embodiments provided in the present application, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present application.

[0035] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it mutually exclusive, independent, or alternative to other embodiments. It can be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0036] The terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example: a component or device including one or more parts is not limited to the one or more parts listed, but optionally includes one or more parts that are not listed but inherent to the exemplified product, or one or more parts that it should have based on the described function.

[0037] See also Figure 1 , Figure 11 is a schematic diagram of the structure of an electronic device 1000 provided in an embodiment of the present application. The electronic device 1000 includes but is not limited to a mobile phone, a tablet computer, a laptop computer, a computer, a wearable device, a drone, a robot, a digital camera, and other devices with communication functions. The present embodiment of the application is described by taking a mobile phone as an example, and other electronic devices can refer to this embodiment.

[0038] See also Figure 2 , Figure 2 1 is a partial exploded schematic diagram of an electronic device 1000 provided in an embodiment of the present application. The working environment of the radio frequency system 100 is illustrated by taking the electronic device 1000 as a mobile phone as an example. 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 is a conductive frame, such as a metal frame. 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 the main circuit board 600, the camera module, the receiver module, the battery 700, the sub-board 800 and various sensors and other devices. One side of the frame 320 along the thickness direction is surrounded by the edge of the display screen 200, and the other side of the frame 320 along the thickness direction is surrounded by the edge of the back cover 400 to form a complete appearance 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 are separate structures. The above is the working environment of the radio frequency system 100 taking a mobile phone as an example, but the radio frequency system 100 of the present application is not limited to the above working environment.

[0039] See also Figure 3 and Figure 4 The radio frequency system 100 includes a first radio frequency transceiver module 10 , a front-end receiving module 20 , a first antenna switch 40 , and a radiator 50 .

[0040] Optionally, the first radio frequency transceiver module 10 is a radio frequency transceiver.

[0041] The first RF transceiver module 10 includes a transmitter and a receiver, wherein the transmitter is used to move the baseband modulated signal to the RF frequency through up-conversion, amplification, filtering and other processes, and transmit it through the antenna radiator 50; the receiver is used to receive the weak RF signal in the space through the antenna radiator 50, and then obtain the baseband signal through filtering, amplification, down-conversion and other processes, and finally send it to the demodulation module for demodulation.

[0042] The first RF transceiver module 10 has at least one signal transmitting port and at least one signal receiving port, wherein the signal transmitting port is electrically connected to a transmitter and the signal receiving port is electrically connected to a receiver.

[0043] The specific structure of the radiator 50 provided in the embodiment is described below with reference to the accompanying drawings.

[0044] The present application does not specifically limit the material of the radiator 50. Optionally, the material of the radiator 50 is a conductive material, including but not limited to conductive materials such as metals and alloys. The present application does not specifically limit the form of the radiator 50. Optionally, the form of the radiator 50 includes but is not limited to a metal frame 320, a metal frame embedded in a plastic frame 320, a metal radiator 50 located in or on the surface of the frame 320, a flexible circuit board antenna formed on a flexible circuit board (Flexible Printed Circuitboard, FPC), a laser direct structured antenna by laser direct structure (Laser Direct Structuring, LDS), a printed direct structured antenna by printing direct structure (Print Direct Structuring, PDS), a conductive sheet antenna (such as a metal bracket antenna), etc. In this embodiment, the radiator 50 is taken as a part of the metal frame 320 of the electronic device 1000 as an example. Figure 3 The position of the radiator 50 in FIG. 5 is only an example, and the radiator 50 may also be located at other positions.

[0045] The radiator 50 is used to receive the first frequency band and the second frequency band. Optionally, the radiator 50 can receive the first frequency band and the second frequency band in a time-sharing manner.

[0046] The first frequency band includes but is not limited to satellite communication frequency bands and ground communication frequency bands. Satellite communication frequency bands include but are not limited to Beidou satellites, Tiantong satellites, near-orbit satellite frequency bands, etc. Ground communication frequency bands include but are not limited to LB frequency bands and HB frequency bands of communication standards such as 2G, LB frequency bands, MB frequency bands, HB frequency bands, UHB frequency bands, etc. of communication standards such as 3G, 4G, 5G, or 6G, or Wi-Fi frequency bands, or GPS frequency bands.

[0047] The second frequency band includes, but is not limited to, satellite communication frequency bands and ground communication frequency bands. Satellite communication frequency bands include, but are not limited to, Beidou satellite, Tiantong satellite, near-orbit satellite frequency bands, etc. Ground communication frequency bands include, but are not limited to, LB frequency bands and HB frequency bands of communication standards such as 2G, LB frequency bands, MB frequency bands, HB frequency bands, UHB frequency bands, etc. of communication standards such as 3G, 4G, 5G, or 6G, or Wi-Fi frequency bands, or GPS frequency bands.

[0048] Optionally, the first frequency band and the second frequency band may be the same frequency band, or partially overlapped frequency bands, or completely non-overlapped frequency bands. In this embodiment, the first frequency band and the second frequency band are completely non-overlapped frequency bands.

[0049] Further optionally, the RF system 100 further includes a matching tuning circuit electrically connected between the radiator 50 and the first antenna switch 40. The matching tuning circuit can tune the impedance matching of the radiator 50 when receiving the first frequency band, and tune the impedance matching of the radiator 50 when receiving the second frequency band.

[0050] The matching tuning circuit includes but is not limited to a tuning switch, an inductor, and / or a capacitor.

[0051] See also Figure 3 and Figure 4 The first antenna switch 40 includes a fixed end and a plurality of selection ends. The fixed end 40a of the first antenna switch 40 is electrically connected to the radiator 50.

[0052] When the RF system 100 also includes a front-end transmitting module, the fixed end 40a of the first antenna switch 40 is switched to be connected to different selection ends to switch the radiator 50 to be connected to the front-end transmitting module to transmit signals; or the radiator 50 is switched to be connected to the front-end receiving module 20 to receive signals.

[0053] Of course, in other implementations, the radio frequency system 100 may only include a receiving channel.

[0054] Optionally, the first antenna switch 40 includes but is not limited to being an SP4T switch.

[0055] The front-end receiving module 20 is electrically connected between the first antenna switch 40 and the receiver of the first RF transceiver module 10 , and the front-end receiving module 20 is used to receive the antenna signal from the radiator 50 via the first antenna switch 40 .

[0056] See also Figure 4 The front-end receiving module 20 at least includes a low noise amplifier 21 and a first combiner 22 .

[0057] The first combiner 22 has an input end, a first output end and a second output end.

[0058] One end of the low noise amplifier 21 is electrically connected to a selection end of the first antenna switch 40 .

[0059] See also Figure 4 The other end of the low-noise amplifier 21 is electrically connected to the input end 22a of the first combiner 22. The low-noise amplifier 21 (Low-Noise Amplifier, LNA) is used to amplify weak signals at the receiver end and improve the signal-to-noise ratio of the system while minimizing noise.

[0060] It can be understood that the frequency response of the low noise amplifier 21 covers the first frequency band and the second frequency band, so as to be able to perform low noise amplification on the first frequency band and perform low noise amplification on the second frequency band.

[0061] See also Figure 4 The first output end 22b of the first combiner 22 is electrically connected to the first receiving port 10a of the first RF transceiver module 10, and the first combiner 22 is used to receive the first frequency band from the low noise amplifier 21 and transmit the first frequency band to the first receiving port 10a of the first RF transceiver module 10.

[0062] See also Figure 4 and Figure 5 , the second output end 22c of the first combiner 22 is electrically connected to the second receiving port 10b of the first RF transceiver module 10, and the first combiner 22 is used to receive the second frequency band from the low noise amplifier 21 and transmit the second frequency band to the second receiving port 10b of the first RF transceiver module 10 ( Figure 4 ) or the receiving port of the second RF transceiver module 12 ( Figure 5 ).

[0063] For further optional information, see Figure 6 The first combiner 22 includes a first branch 221 and a second branch 222. One end of the first branch 221 is connected to one end of the second branch 222 and forms an input end 22a of the first combiner 22. The other end of the first branch 221 forms a first output end 22b of the first combiner 22, which is used to output the first frequency band. The other end of the second branch 222 forms a second output end 22c of the first combiner 22, which is used to output the second frequency band.

[0064] The first branch 221 is a filter circuit, and the first branch 221 is used to pass the first frequency band and filter out branches of other frequency bands. Optionally, the first branch 221 includes but is not limited to an LC filter circuit, and the first branch 221 is designed based on the frequency response characteristics of inductance and capacitance. It presents low impedance to harmonics of the first frequency and high impedance to harmonics of other frequencies through the inherent impedance characteristics of capacitance and inductance to achieve filtering.

[0065] The second branch 222 is a filter circuit, and the second branch 222 is a branch for passing the second frequency band and filtering out other frequency bands. Optionally, the second branch 222 includes but is not limited to an LC filter circuit, and the second branch 222 is designed based on the frequency response characteristics of inductance and capacitance. It presents low impedance to the harmonics of the second frequency and high impedance to the harmonics of other frequencies through the inherent impedance characteristics of capacitance and inductance to achieve filtering.

[0066] There is good isolation between the first branch 221 and the second branch 222, so as to transmit the first frequency band and the second frequency band to the first receiving port 10a and the second receiving port 10b of the first RF transceiver module 10 respectively; or, transmit the first frequency band and the second frequency band to the first receiving port 10a of the first RF transceiver module 10 and the receiving port of the second RF transceiver module 12 respectively.

[0067] Optionally, when the first frequency band and the second frequency band are the same type of network signals, the reception of the first frequency band and the second frequency band can share the first RF transceiver module 10. The first combiner 22 is used to transmit the first frequency band and the second frequency band to the first receiving port 10a and the second receiving port 10b of the first RF transceiver module 10, respectively. For example, the first frequency band is the satellite signal L band, and the second frequency band is the satellite signal S band.

[0068] Optionally, when the first frequency band and the second frequency band are different types of network signals, the reception of the first frequency band and the second frequency band can share the first RF transceiver module 10. The first combiner 22 is used to transmit the first frequency band and the second frequency band to the first receiving port 10a of the first RF transceiver module 10 and the receiving port of the second RF transceiver module 12, respectively. For example, the first frequency band is the satellite signal S band, and the second frequency band is the GPS-L1 band. For another example, the first frequency band is the satellite signal L band, and the second frequency band is the Wi-Fi 2.4G band. For another example, the first frequency band is the satellite signal L band, and the second frequency band is the Bluetooth band.

[0069] As can be seen from the above, the radio frequency system 100 can reuse the low noise amplifier 21 to perform low noise amplification on the first frequency band when receiving the first frequency band and to perform low noise amplification on the second frequency band when receiving the second frequency band.

[0070] The radio frequency system 100 provided in the present application is designed to receive the first frequency band and the second frequency band by designing the radiator 50; the fixed end 40a of the first antenna switch 40 is electrically connected to the radiator 50, and the front-end receiving module 20 includes a low-noise amplifier 21 and a first combiner 22, one end of the low-noise amplifier 21 is electrically connected to the radiator 50 via the first antenna switch 40, the other end of the low-noise amplifier 21 is electrically connected to the input end 22a of the first combiner 22, and the first output end 22b of the first combiner 22 is electrically connected to the first receiving port 10a of the first radio frequency transceiver module 10, and is used to send the first frequency band to the first receiving port 10a of the first radio frequency transceiver module 10, and the first The second output end 22c of the combiner 22 is electrically connected to the second receiving port 10b of the first RF transceiver module 10, and is used to transmit the second frequency band to the second receiving port 10b of the first RF transceiver module 10 or the receiving port of the second RF transceiver module 12; in this way, the receiving channel of the first frequency band and the receiving channel of the second frequency band share the second combiner, the low noise amplifier 21, and the first combiner 22. Compared with the receiving channel of the first frequency band and the receiving channel of the second frequency band respectively using two low noise amplifiers 21, one low noise amplifier 21 is saved, thereby reducing the number of components, reducing the space occupied by the RF system 100, achieving miniaturization, and saving costs.

[0071] Optional, see Figure 7 The radio frequency system 100 further includes a second combiner 23. The second combiner 23 is electrically connected between the first antenna switch 40 and the low noise amplifier 21.

[0072] The second combiner 23 has a first input terminal, a second input terminal and an output terminal.

[0073] See also Figure 7 The first input end 23a of the second combiner 23 is electrically connected to the first selection end 40b of the first antenna switch 40, and is used to receive the first frequency band from the radiator 50 through the first antenna switch 40. The second input end 23b of the second combiner 23 is electrically connected to the second selection end 40c of the first antenna switch 40, and is used to receive the second frequency band from the radiator 50 through the first antenna switch 40. The output end 23c of the second combiner 23 is electrically connected to one end of the low noise amplifier 21. The second combiner 23 is used to merge the two paths into the low noise amplifier 21.

[0074] Specifically, the first frequency band and the second frequency band are different frequency bands. The radio frequency system 100 receives the first frequency band and the second frequency band in different time periods.

[0075] The radio frequency system 100 further includes a control unit (not shown), one end of which is electrically connected to the first antenna switch 40 .

[0076] When the radiator 50 receives the first frequency band, the control unit controls the fixed end 40a of the first antenna switch 40 to be connected with the first selection end 40b of the first antenna switch 40. At this time, the first input end 23a of the second combiner 23 is connected with the radiator 50, and the first frequency band received by the radiator 50 is transmitted through the second combiner 23, the low noise amplifier 21, and the first combiner 22 to the first receiving port 10a of the first RF transceiver module 10.

[0077] When the radiator 50 receives the second frequency band, the control unit controls the fixed end 40a of the first antenna switch 40 to be connected with the second selection end 40c of the first antenna switch 40. At this time, the second input end 23b of the second combiner 23 is connected with the radiator 50, and the second frequency band received by the radiator 50 is transmitted through the second combiner 23, the low noise amplifier 21, and the first combiner 22 to the second receiving port 10b of the first RF transceiver module 10 or the receiving port of the second RF transceiver module 12.

[0078] In this embodiment, the first antenna switch 40 switches different selection terminals and fixed terminals to be turned on, so that the first frequency band and the second frequency band flow from different branches of the second combiner 23 to the low noise amplifier 21 respectively, thereby reducing interference from other frequency bands.

[0079] For further optional information, see Figure 8 The second combiner 23 includes a third branch 231 and a fourth branch 232. One end of the third branch 231 forms a first input end 23a of the second combiner 23, which is used to input the first frequency band. One end of the fourth branch 232 forms a second input end 23b of the second combiner 23, which is used to input the second frequency band. The other end of the third branch 231 is electrically connected to the other end of the fourth branch 232 and forms an output end 23c of the second combiner 23.

[0080] The third branch 231 is a filter circuit, and the third branch 231 is used to pass the first frequency band and filter out branches of other frequency bands. Optionally, the third branch 231 includes but is not limited to an LC filter circuit, and the third branch 231 is designed based on the frequency response characteristics of inductance and capacitance. It presents low impedance to harmonics of the first frequency and high impedance to harmonics of other frequencies through the inherent impedance characteristics of capacitance and inductance to achieve filtering.

[0081] The fourth branch 232 is a filter circuit, and the fourth branch 232 is a branch for passing the second frequency band and filtering out other frequency bands. Optionally, the fourth branch 232 includes but is not limited to an LC filter circuit, and the fourth branch 232 is designed based on the frequency response characteristics of inductance and capacitance. It presents low impedance to the harmonics of the second frequency and high impedance to the harmonics of other frequencies through the inherent impedance characteristics of capacitance and inductance to achieve filtering.

[0082] There is good isolation between the third branch 231 and the fourth branch 232, so as to receive the first frequency band from the first selection end 40b of the first antenna switch 40 and the second frequency band from the second selection end 40c of the first antenna switch 40 respectively.

[0083] The first frequency band includes a first sub-frequency band and a second sub-frequency band.

[0084] For example, the first sub-frequency band includes but is not limited to the L band of the Beidou satellite signal, and the second sub-frequency band includes but is not limited to the GPS-L1 band.

[0085] See also Figure 6 , Figure 8 and Fig. 9 The front-end receiving module 20 includes a signal distribution element 24. An input end 24a of the signal distribution element 24 is electrically connected to a first output end 22b of the first combiner 22. A first output end 24b of the signal distribution element 24 is electrically connected to a first receiving port 10a of the first RF transceiver module 10, for transmitting the first sub-frequency band to the first receiving port 10a of the first RF transceiver module 10.

[0086] See also Figure 6 , Figure 8 and Fig. 9 The RF system 100 further includes a third RF transceiver module 13. The third RF transceiver module 13 is electrically connected to the second output terminal 24c of the signal distribution element 24, and is used to receive the second sub-frequency band.

[0087] In this embodiment, the first sub-band and the second sub-band can reuse the third branch 231 of the second combiner 23, the low noise amplifier 21, the first branch 221 of the first combiner 22, etc. In this way, while increasing the number of frequency bands that the RF system 100 can receive, no additional devices are added, which reduces the layout area of ​​the RF system 100 and facilitates the miniaturization of the RF system 100 in the main circuit.

[0088] In an alternative implementation, see Figure 6 , Figure 8 and Fig.10 , the first sub-band is the L-band of Beidou satellite signal (referred to as BDS_RX-L), and the second sub-band is the GPS-L1 band. The second band is the S-band of Beidou satellite signal (referred to as BDS_RX-S). Since the L-band of Beidou satellite signal is close to the GPS-L1 band, the third branch 231 of the second combiner 23, the low noise amplifier 21, the first branch 221 of the first combiner 22, etc. can be reused.

[0089] The first radio frequency transceiver module 10 is a Beidou transceiver module. The third radio frequency transceiver module 13 is a GPS transceiver module.

[0090] Furthermore, since the L band of the Beidou satellite signal and the GPS-L1 frequency band do not work at the same time, the L band of the Beidou satellite signal and the GPS-L1 frequency band can be transmitted to the signal distribution element 24 at different times via the third branch 231 of the second combiner 23, the low noise amplifier 21, and the first branch 221 of the first combiner 22, and the first RF transceiver module 10 and the third RF transceiver module 13 through the signal distribution element 24.

[0091] In this embodiment, the L band of the Beidou satellite signal and the GPS-L1 band can reuse the third branch 231 of the second combiner 23, the low noise amplifier 21, the first branch 221 of the first combiner 22, etc. In this way, while increasing the number of frequency bands that the RF system 100 can receive, no additional devices are added, which reduces the layout area of ​​the RF system 100 and facilitates the miniaturization of the RF system 100 in the main circuit.

[0092] In another optional embodiment, please refer to Figure 6 , Figure 8 and Fig.11 , the first sub-band is the S band of the Beidou satellite signal (referred to as BDS_RX-S), and the second sub-band is the Wi-Fi 2.4G band. The second band is the L band of the Beidou satellite signal (referred to as BDS_RX-L). The first band is because the S band of the Beidou satellite signal is close to the Wi-Fi 2.4G band, so the third branch 231 of the second combiner 23, the low noise amplifier 21, the first branch 221 of the first combiner 22, etc. can be reused.

[0093] The first radio frequency transceiver module 10 is a Beidou transceiver module. The third radio frequency transceiver module 13 is a Wi-Fi 2.4G transceiver module.

[0094] Furthermore, since the S band of the Beidou satellite signal and the Wi-Fi 2.4G band do not work at the same time, the S band of the Beidou satellite signal and the Wi-Fi 2.4G band can be transmitted to the signal distribution element 24 at different times via the third branch 231 of the second combiner 23, the low noise amplifier 21, and the first branch 221 of the first combiner 22, and the first RF transceiver module 10 and the third RF transceiver module 13 through the signal distribution element 24.

[0095] In this embodiment, the S band of the Beidou satellite signal and the Wi-Fi 2.4G band can reuse the third branch 231 of the second combiner 23, the low noise amplifier 21, the first branch 221 of the first combiner 22, etc. In this way, while increasing the number of frequency bands that the RF system 100 can receive, no additional devices are added, which reduces the layout area of ​​the RF system 100 and facilitates the miniaturization of the RF system 100 in the main circuit.

[0096] In another optional implementation, please refer to Figure 6 , Figure 8 and Fig.12 , the first sub-band is the S band of the Beidou satellite signal (referred to as BDS_RX-S), and the second sub-band is the Bluetooth band (referred to as BT). The second band is the L band of the Beidou satellite signal (referred to as BDS_RX-L). Since the S band of the Beidou satellite signal is close to the Bluetooth band, the third branch 231 of the second combiner 23, the low noise amplifier 21, the first branch 221 of the first combiner 22, etc. can be reused.

[0097] The first radio frequency transceiver module 10 is a Beidou transceiver module. The third radio frequency transceiver module 13 is a Bluetooth transceiver module.

[0098] Furthermore, since the S band and the Bluetooth band of the Beidou satellite signal do not work at the same time, the S band and the Bluetooth band of the Beidou satellite signal can be transmitted to the signal distribution element 24 at different times via the third branch 231 of the second combiner 23, the low noise amplifier 21, and the first branch 221 of the first combiner 22, and the first RF transceiver module 10 and the third RF transceiver module 13 through the signal distribution element 24.

[0099] In this embodiment, the S band and the Bluetooth band of the Beidou satellite signal can reuse the third branch 231 of the second combiner 23, the low noise amplifier 21, the first branch 221 of the first combiner 22, etc. In this way, while increasing the number of frequency bands that the RF system 100 can receive, no additional devices are added, which reduces the layout area of ​​the RF system 100 and facilitates the miniaturization of the RF system 100 in the main circuit.

[0100] In an alternative implementation, see Figure 6 , Figure 8 and Fig.13 The signal distribution element 24 includes a power divider 241. The power divider 241 is a device that divides one input signal energy into two or more paths to output equal or unequal energy.

[0101] Optionally, the signal distribution element 24 is a two-power divider 241 for equal distribution.

[0102] See also Figure 6 , Figure 8 and Fig.13 The power divider 241 includes a first power branch 2411 and a second power branch 2412. One end of the first power branch 2411 is electrically connected to one end of the second power branch 2412, and the other end of the first power branch 2411 is electrically connected to the first receiving port 10a of the first RF transceiver module 10. The other end of the second power branch 2412 is electrically connected to the receiving port of the third RF transceiver module 13, so that when receiving the first sub-band, the power divider 241 distributes a part of the energy to the first receiving port 10a of the first RF transceiver module 10 via the first power branch 2411; and when receiving the second sub-band, the power divider 241 distributes a part of the energy to the receiving port of the third RF transceiver module 13 via the second power branch 2412.

[0103] The radio frequency system 100 further includes a control unit. The control unit is electrically connected to a control end of the first antenna switch 40 .

[0104] When the radio frequency system 100 receives the first sub-frequency band, the control unit is used to control the fixed end 40a of the first antenna switch 40 to be conductive with the first selection end 40b of the first antenna switch 40 in a first time period.

[0105] The radiator 50 receives the first sub-frequency band and transmits the first sub-frequency band to the first receiving port 10a of the first RF transceiver module 10 via the first selection end 40b of the first antenna switch 40, the third branch 231 of the second combiner 23, the low noise amplifier 21, the first branch 221 of the first combiner 22, and the first power branch 2411 of the power divider 241.

[0106] In this way, the first receiving port 10 a of the first RF transceiver module 10 receives the first sub-frequency band via the front-end receiving module 20 , the first selection terminal 40 b of the first antenna switch 40 , and the radiator 50 .

[0107] When the radio frequency system 100 receives the second sub-frequency band, the control unit is used to control the fixed end 40a of the first antenna switch 40 to be connected with the first selection end 40b of the first antenna switch 40 in the second time period.

[0108] The radiator 50 receives the second sub-frequency band and transmits the second sub-frequency band to the receiving port of the third RF transceiver module 13 via the first selection end 40b of the first antenna switch 40, the third branch 231 of the second combiner 23, the low noise amplifier 21, the first branch 221 of the first combiner 22, and the second power branch 2412 of the power divider 241.

[0109] In this way, the third RF transceiver module 13 receives the second sub-frequency band via the front-end receiving module 20 , the first selection terminal 40 b of the first antenna switch 40 , and the radiator 50 .

[0110] The first time period and the second time period are different time periods. Therefore, the first sub-frequency band and the second sub-frequency band work in different time periods. This application does not make specific restrictions on the order of the first time period and the second time period.

[0111] When the radio frequency system 100 receives the second frequency band, the control unit is used to control the fixed end 40a of the first antenna switch 40 and the second selection end 40c of the first antenna switch 40 to be connected in a third time period.

[0112] The radiator 50 receives the second frequency band, and transmits the second frequency band to the second receiving port 10b of the first RF transceiver module 10 via the second selection terminal 40c of the first antenna switch 40, the fourth branch 232 of the second combiner 23, the low noise amplifier 21, and the second branch 222 of the first combiner 22. Of course, in other embodiments, the second frequency band received by the radiator 50 can also be transmitted to the receiving port of the second RF transceiver module 12 via the second selection terminal 40c of the first antenna switch 40, the fourth branch 232 of the second combiner 23, the low noise amplifier 21, and the second branch 222 of the first combiner 22.

[0113] In this way, the second receiving port 10 b of the first RF transceiver module 10 receives the second frequency band via the front-end receiving module 20 , the second selection terminal 40 c of the first antenna switch 40 , and the radiator 50 .

[0114] Among them, the first time period, the second time period, and the third time period are different time periods. Therefore, the first sub-frequency band works in different time periods from the second sub-frequency band and the third sub-frequency band. This application does not make specific restrictions on the order of the first time period, the second time period, and the third time period.

[0115] In another alternative embodiment, see Fig.14 , the signal distribution element 24 includes a first sub-switch 242 .

[0116] Optionally, the first sub-switch 242 includes but is not limited to being an SP4T switch.

[0117] See also Fig.14, the input end 242a of the first sub-switch 242 is electrically connected to the first output end 22b of the first combiner 22. The first output end 242b of the first sub-switch 242 is electrically connected to the first receiving port 10a of the first RF transceiver module 10. The second output end 242c of the first sub-switch 242 is electrically connected to the third RF transceiver module 13. The input end 242a of the first sub-switch 242 can selectively conduct the first output end 242b of the first sub-switch 242 and the second output end 242c of the first sub-switch 242.

[0118] The RF system 100 further includes a control unit. The control unit is electrically connected to the control end of the first sub-switch 242. The control unit is used to control the RF system 100 to conduct the first output end 242b of the first sub-switch 242 and the input end 242a of the first sub-switch 242 when receiving the first sub-frequency band, thereby connecting the first output end 22b of the first combiner 22 to the first receiving port 10a of the first RF transceiver module 10, so that the first receiving port 10a of the first RF transceiver module 10 can receive the first sub-frequency band.

[0119] The control unit is used to control the RF system 100 to turn on the second output end 242c of the first sub-switch 242 and the input end 242a of the first sub-switch 242 when receiving the second sub-frequency band, thereby connecting the first output end 22b of the first combiner 22 to the receiving port of the third RF transceiver module 13, so that the receiving port of the third RF transceiver module 13 can receive the second sub-frequency band.

[0120] In this embodiment, the first sub-switch 242 is set to switch to turn on different output ends when receiving different frequency bands (the first sub-band or the second sub-band), so that all the energy output by the first output end 22b of the first combiner 22 is transmitted to the first receiving port 10a of the first RF transceiver module 10 or the receiving port of the third RF transceiver module 13, so as to reduce the receiving energy loss.

[0121] Optionally, as mentioned above, the radio frequency system 100 further includes a control unit. The control unit is electrically connected to a control end of the first antenna switch 40 and a control end of the first sub-switch 242 .

[0122] When the RF system 100 receives the first sub-frequency band, the control unit is used to control the fixed end 40a of the first antenna switch 40 and the first selection end 40b of the first antenna switch 40 to be connected, and the input end 242a of the first sub-switch 242 and the first receiving port 10a of the first RF transceiver module 10 to be connected in the first time period.

[0123] The radiator 50 receives the first sub-frequency band and transmits the first sub-frequency band to the first receiving port 10a of the first RF transceiver module 10 via the first selection end 40b of the first antenna switch 40, the third branch 231 of the second combiner 23, the low noise amplifier 21, the first branch 221 of the first combiner 22, and the first output end 242b of the first sub-switch 242 in sequence.

[0124] In this way, the first receiving port 10 a of the first RF transceiver module 10 receives the first sub-frequency band via the front-end receiving module 20 , the first selection terminal 40 b of the first antenna switch 40 , and the radiator 50 .

[0125] When the RF system 100 receives the second sub-frequency band, the control unit is used to control the fixed end 40a of the first antenna switch 40 and the first selection end 40b of the first antenna switch 40 to be connected, and the input end 242a of the first sub-switch 242 and the third RF transceiver module 13 to be connected in the second time period.

[0126] The radiator 50 receives the second sub-frequency band and transmits the second sub-frequency band to the receiving port of the third RF transceiver module 13 via the first selection end 40b of the first antenna switch 40, the third branch 231 of the second combiner 23, the low noise amplifier 21, the first branch 221 of the first combiner 22, and the second output end 242c of the first sub-switch 242 in sequence.

[0127] In this way, the third RF transceiver module 13 receives the second sub-frequency band via the front-end receiving module 20 , the first selection terminal 40 b of the first antenna switch 40 , and the radiator 50 .

[0128] The first time period and the second time period are different time periods. Therefore, the first sub-frequency band and the second sub-frequency band work in different time periods. This application does not make specific restrictions on the order of the first time period and the second time period.

[0129] When the radio frequency system 100 receives the second frequency band, the control unit is used to control the fixed end 40a of the first antenna switch 40 and the second selection end 40c of the first antenna switch 40 to be connected in a third time period.

[0130] The radiator 50 receives the second frequency band, and transmits the second frequency band to the second receiving port 10b of the first RF transceiver module 10 via the second selection terminal 40c of the first antenna switch 40, the fourth branch 232 of the second combiner 23, the low noise amplifier 21, and the second branch 222 of the first combiner 22. Of course, in other embodiments, the second frequency band received by the radiator 50 can also be transmitted to the receiving port of the second RF transceiver module 12 via the second selection terminal 40c of the first antenna switch 40, the fourth branch 232 of the second combiner 23, the low noise amplifier 21, and the second branch 222 of the first combiner 22.

[0131] In this way, the second receiving port 10 b of the first RF transceiver module 10 receives the second frequency band via the front-end receiving module 20 , the second selection terminal 40 c of the first antenna switch 40 , and the radiator 50 .

[0132] Optional, as above, see Figure 4 and Fig.15 The RF system 100 further includes a front-end transmitting module 30. One end of the front-end transmitting module 30 is electrically connected to the first transmitting port 10c of the first RF transceiver module 10. The other end of the front-end transmitting module 30 is electrically connected to the third selection end 40d of the first antenna switch 40. The front-end transmitting module 30 is used to transmit the first frequency band.

[0133] Optionally, the front-end transmitting module 30 at least includes a filter 31, a first DC blocking capacitor 325, a power amplifier 32, and a second DC blocking capacitor 327, which are electrically connected in sequence. The filter 31 is electrically connected between the first transmitting port 10c of the first RF transceiver module 10 and the power amplifier 32, and is used to pass the first frequency band and filter out the frequency bands outside the first frequency band.

[0134] For further information, see Figure 4 and Fig.15 The RF system 100 further includes a power supply 61 and a boost module 62. The power supply 61 is electrically connected to the boost module 62, and the boost module 62 is electrically connected to the power amplifier 32, so as to facilitate the amplification function of the first frequency band. In addition, the power amplifier 32 also feeds back the amplified voltage to the first RF transceiver module 10 through a feedback circuit, so as to monitor the output power of the power amplifier 32.

[0135] Further optionally, the first RF transceiver module 10 can also send an enable signal to the low noise amplifier 21 through the enable transmission line to control the low noise amplifier 21 to work or shut down.

[0136] The radio frequency system 100 of this embodiment can realize transmission or reception of the first frequency band by switching the first antenna switch 40. In addition, reception of the second frequency band can also be realized. In this way, the second frequency band and the first frequency band can share the radiator 50 and part of the receiving channel, such as sharing the low noise amplifier 21. Compared with the first frequency band and the second frequency band respectively setting the radiator 50 and the receiving channel, the number of radiators 50 and the area occupied are reduced, so that more radiators 50 of other frequency bands can be set on the frame or other positions of the electronic device, and the space occupied by the radio frequency system 100 on the main circuit board 600 can also be reduced, and more space can be reserved for the radio frequency architecture of other frequency bands to be set on the main circuit board 600.

[0137] When the first frequency band includes a first sub-frequency band and a second sub-frequency band, the front-end transmitting module 30 is used to transmit the first sub-frequency band.

[0138] For example, the first sub-frequency band is the L-band of the Beidou satellite signal, the second sub-frequency band is the GPS-L1 frequency band, and the second frequency band is the S-band of the Beidou satellite signal.

[0139] Thus, the radio frequency system 100 provided in this embodiment can support the transmission of Beidou satellite signals in the L band, can also support the reception of Beidou satellite signals in the L band or S band, and can also serve as a receiving antenna for the GPS-L1 band.

[0140] As mentioned above, the radio frequency system 100 further includes a control unit. The control unit is electrically connected to the control end of the first antenna switch 40 .

[0141] In other implementations, the front-end transmitting module 30 may also transmit in other frequency bands, such as the second frequency band, or a frequency band different from both the first frequency band and the second frequency band.

[0142] When the RF system 100 transmits the first frequency band, the control unit is used to control the fixed end 40a of the first antenna switch 40 to be connected to the third selection end in a fourth time period. At this time, the front-end transmitting module 30 is connected to the radiator 50, and the front-end receiving module 20 is disconnected from the radiator 50.

[0143] The first RF transceiver module 10 transmits the first frequency band via the front-end transmitting module 30 , the third selection terminal 40 d of the first antenna switch 40 , and the radiator 50 .

[0144] Optionally, the radiator 50 is also used to receive a third frequency band. Optionally, the third frequency band may be close to the second frequency band or the first frequency band, so that the radiator 50 can be reused without additionally changing the structure of the radiator 50.

[0145] Optionally, the first frequency band includes an L band of Beidou satellite signals and a GPS-L1 band. The second frequency band includes an S band of Beidou satellite signals. The third frequency band includes a Wi-Fi 2.4G frequency band or a Bluetooth frequency band.

[0146] In this implementation, the third frequency band is similar to the second frequency band. The second frequency band is the S band of the Beidou satellite signal, and the third frequency band is the Wi-Fi 2.4G frequency band.

[0147] In an alternative embodiment, see Fig.16 The RF system 100 further includes a fourth RF transceiver module 14. The fourth RF transceiver module 14 is electrically connected to the fourth selection terminal 40e of the first antenna switch 40, and is used to receive the third frequency band.

[0148] In this embodiment, by electrically connecting the fourth selection end 40e of the first antenna switch 40 to the fourth RF transceiver module 14, the first antenna switch 40 switches to receiving the third frequency band, or transmitting the first frequency band, or receiving the first frequency band, or receiving the second frequency band in different time periods, thereby increasing the function of receiving the third frequency band of the RF system 100.

[0149] Specifically, the third frequency band is the Wi-Fi 2.4G frequency band, and the fourth RF transceiver module 14 is a Wi-Fi 2.4G transceiver module. The RF system 100 provided in this embodiment can support the transmission of the L band of Beidou satellite signals, and can also support the reception of the L band or S band of Beidou satellite signals, and can also serve as a receiving antenna for the GPS-L1 frequency band and a receiving antenna for Wi-Fi 2.4G. The number and area occupied by the radiators 50 are reduced, so that more radiators 50 of other frequency bands can be arranged on the frame or other positions of the electronic device, and the space occupied by the RF system 100 on the main circuit board 600 can be reduced, and more space can be reserved for the RF architecture of other frequency bands to be arranged on the main circuit board 600.

[0150] In another alternative embodiment, see Fig.17 , the radiator 50 is also used to receive a third frequency band. Optionally, the third frequency band may be similar to the second frequency band or the first frequency band, so that the radiator 50 can be reused without additionally changing the structure of the radiator 50. In this embodiment, the third frequency band is similar to the second frequency band. The second frequency band is the S band of the Beidou satellite signal, and the third frequency band is the Wi-Fi 2.4G frequency band.

[0151] See also Fig.17 The RF system 100 also includes a second antenna switch 15 and a fourth RF transceiver module 14.

[0152] The fixed end of the second antenna switch 15 is electrically connected to the second output end 22c of the first combiner 22. The first selection end of the second antenna switch 15 is electrically connected to the second receiving port 10b of the first RF transceiver module 10. The second selection end of the second antenna switch 15 is electrically connected to the fourth RF transceiver module 14.

[0153] Optionally, the aforementioned control unit is electrically connected to a control end of the second antenna switch 15 .

[0154] See also Figure 6 , Figure 8 and Fig.17 When the RF system 100 receives the second frequency band, the second control unit controls the fixed end 40a of the first antenna switch 40 to be connected with the second selection end 40c of the first antenna switch 40, and the fixed end and the second selection end of the second antenna switch 15 to be connected. The third frequency band received by the radiator 50 is transmitted to the second receiving port 10b of the first RF transceiver module 10 or the receiving port of the second RF transceiver module 12 via the first antenna switch 40, the fourth branch 232 of the second combiner 23, the low noise amplifier 21, the second branch 222 of the first combiner 22 and the first selection end of the second antenna switch 15 to receive the third frequency band.

[0155] See also Figure 6 , Figure 8 and Fig.17 When the RF system 100 receives the third frequency band, the second control unit controls the fixed end 40a of the first antenna switch 40 to be connected to the second selection end 40c of the first antenna switch 40, and the fixed end and the second selection end of the second antenna switch 15 to be connected. The third frequency band received by the radiator 50 is transmitted to the receiving port of the fourth RF transceiver module 14 via the first antenna switch 40, the fourth branch 232 of the second combiner 23, the low noise amplifier 21, the second branch 222 of the first combiner 22 and the second selection end of the second antenna switch 15 to receive the third frequency band.

[0156] In this embodiment, by electrically connecting the second selection end of the second antenna switch 15 to the fourth RF transceiver module 14, the second antenna switch 15 switches to receive the third frequency band or the second frequency band in different time periods, thereby increasing the function of receiving the third frequency band of the RF system 100.

[0157] Specifically, the third frequency band is the Wi-Fi 2.4G frequency band, and the fourth RF transceiver module 14 is a Wi-Fi 2.4G transceiver module. The RF system 100 provided in this embodiment can support the transmission of the L band of Beidou satellite signals, and can also support the reception of the L band or S band of Beidou satellite signals, and can also serve as a receiving antenna for the GPS-L1 frequency band and a receiving antenna for Wi-Fi 2.4G. The number and area occupied by the radiators 50 are reduced, so that more radiators 50 of other frequency bands can be arranged on the frame or other positions of the electronic device, and the space occupied by the RF system 100 on the main circuit board 600 can be reduced, and more space can be reserved for the RF architecture of other frequency bands to be arranged on the main circuit board 600.

[0158] In other implementations, the third frequency band may also be a Bluetooth frequency band. In the implementations where the third frequency band is the Wi-Fi 2.4G frequency band, the Wi-Fi 2.4G frequency band may be replaced by a Bluetooth frequency band.

[0159] For further optional information, see Figures 18 to 20 The radiator 50 is also used to receive a fourth frequency band. The third frequency band is the Wi-Fi 2.4G frequency band, and the fourth frequency band is the Bluetooth frequency band. The radio frequency system 100 also includes a fifth radio frequency transceiver module 16. The fifth radio frequency transceiver module 16 is used to receive the fourth frequency band.

[0160] In a first alternative implementation, see Fig.18 The fourth RF transceiver module 14 is electrically connected to the fourth selection end 40 e of the first antenna switch 40 , and the fifth RF transceiver module 16 is electrically connected to the second selection end of the second antenna switch 15 .

[0161] In a second alternative implementation, see Fig.19 The fifth RF transceiver module 16 is electrically connected to the fourth selection end 40 e of the first antenna switch 40 , and the fourth RF transceiver module 14 is electrically connected to the second selection end of the second antenna switch 15 .

[0162] In a third alternative implementation, see Fig. 20 The fifth RF transceiver module 16 is electrically connected to the second selection end of the second antenna switch 15 , and the fourth RF transceiver module 14 is electrically connected to the third selection end of the second antenna switch 15 .

[0163] In other embodiments, when the aforementioned third frequency band is the Wi-Fi 2.4G frequency band, the RF system 100 further includes one or more transmission paths of the Wi-Fi 2.4G frequency band and one or more reception paths of the Wi-Fi 2.4G frequency band, and the one or more transmission paths of the Wi-Fi 2.4G frequency band and the one or more reception paths of the Wi-Fi 2.4G frequency band are electrically connected to the fourth RF transceiver module 14, so as to form an antenna architecture such as 1T2R (1 transmission and 2 receptions), 1T4R (1 transmission and 4 receptions), 2T4R (2 transmissions and 4 receptions), 2*2MIMO or 4*4MIMO of the Wi-Fi 2.4G frequency band.

[0164] It should be noted that the above modules can be separate chips or integrated with other modules, devices or circuits in the same chip. The above devices can be separate chips or integrated with other modules, devices or circuits in the same chip.

[0165] The Beidou satellite communication architecture has 1 TX and 2 RX, of which the 2 RX are BD_L (L band, frequency is 1610-1626.5MHz) and BD_S (S band, frequency is 2483.5-2500MHz). If the 2 RXs each take a hardware path, 3 filters 31 and 2 low noise amplifiers 21 will be needed, which increases the layout area of ​​the mainboard, is not conducive to miniaturization, and the hardware cost is high.

[0166] The radio frequency system 100 provided in the present application combines the receiving path of the L / S band into a hardware path after passing through SP4T (the first antenna switch 40) through a separation combiner (i.e., the aforementioned second combiner 23, which can be constructed by selecting a device, or a combiner / dual-path filter 31), and uses one LNA (low noise amplifier 21) for signal amplification. After the signal passes through the LNA (low noise amplifier 21), it passes through a separation combiner (the aforementioned first combiner 22) to separate the signal into the L / S path and return to the satellite communication signal processing chip. Compared with the solution of three filters 31 + two LNAs, the solution of using two combiners + one LNA (low noise amplifier 21) is equivalent to reducing the space occupied by one filter 31 and one low noise amplifier 21, because the size of the combiner is similar to that of the filter 31, which can effectively save the PCB layout area, is conducive to the miniaturization of the mainboard, and can also reduce the material cost of the Beidou satellite communication system.

[0167] When the RF system 100 also multiplexes and receives the first sub-band, the second sub-band, or the second frequency band, the space occupied by two filters 31 and two low-noise amplifiers 21 is reduced. When the RF system 100 also multiplexes and receives the first sub-band, the second sub-band, the second frequency band, or the third frequency band, the space occupied by three filters 31 and three low-noise amplifiers 21 is reduced. When the RF system 100 also multiplexes and receives the first sub-band, the second sub-band, the second frequency band, the third frequency band, or the fourth frequency band, the space occupied by four filters 31 and four low-noise amplifiers 21 is reduced.

[0168] 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 the field can change, modify, replace and modify the above embodiments within the scope of the present application, and these improvements and modifications are also regarded as the scope of protection of the present application.

Claims

1. A radio frequency system, characterized in that: include: A radiator, the radiator is used to receive a first frequency band and a second frequency band; a first antenna switch, wherein a fixed end of the first antenna switch is electrically connected to the radiator; A first radio frequency transceiver module; and A front-end receiving module includes a low noise amplifier and a first combiner, wherein one end of the low noise amplifier is electrically connected to the first antenna switch, the other end of the low noise amplifier is electrically connected to the input end of the first combiner, the first output end of the first combiner is electrically connected to the first receiving port of the first RF transceiver module, and is used to transmit the first frequency band to the first receiving port of the first RF transceiver module, and the second output end of the first combiner is electrically connected to the second receiving port of the first RF transceiver module, and is used to transmit the second frequency band to the second receiving port of the first RF transceiver module or the receiving port of the second RF transceiver module.

2. The radio frequency system according to claim 1, characterized in that The first antenna switch includes a fixed end, a first selection end and a second selection end; The front-end receiving module also includes a second combiner, a first input end of the second combiner is electrically connected to the first selection end, and is used to receive the first frequency band via the first antenna switch, a second input end of the second combiner is electrically connected to the second selection end, and is used to receive the second frequency band via the first antenna switch, and an output end of the second combiner is electrically connected to one end of the low noise amplifier.

3. The radio frequency system according to claim 2, characterized in that: The first frequency band includes a first sub-frequency band and a second sub-frequency band; The front-end receiving module comprises a signal distribution element, the input end of the signal distribution element is electrically connected to the first output end of the first combiner, and the first output end of the signal distribution element is electrically connected to the first receiving port of the first RF transceiver module, for transmitting the first sub-frequency band to the first receiving port of the first RF transceiver module; The radio frequency system further includes a third radio frequency transceiver module, which is electrically connected to the second output end of the signal distribution element and is used to receive the second sub-frequency band.

4. The radio frequency system according to claim 3, characterized in that: The signal distribution element includes a power divider.

5. The radio frequency system according to claim 4, characterized in that: The radio frequency system further includes a control unit, the control unit being electrically connected to a control end of the first antenna switch; The control unit is used to control the fixed end and the first selection end of the first antenna switch to be connected in a first time period, so that the first receiving port of the first RF transceiver module receives the first sub-frequency band via the front-end receiving module, the first selection end of the first antenna switch, and the radiator; The control unit is used to control the fixed end and the first selection end of the first antenna switch to be turned on in the second time period, and the third RF transceiver module receives the second sub-frequency band via the front-end receiving module, the first selection end of the first antenna switch, and the radiator; The control unit is used to control the fixed end and the second selection end of the first antenna switch to be connected in a third time period, and the second receiving port of the first RF transceiver module receives the second frequency band via the front-end receiving module, the second selection end of the first antenna switch, and the radiator.

6. The radio frequency system according to claim 3, characterized in that: The signal distribution element includes a first sub-switch, an input end of the first sub-switch is electrically connected to a first output end of the first combiner, a first output end of the first sub-switch is electrically connected to a first receiving port of the first RF transceiver module, and a second output end of the first sub-switch is electrically connected to the third RF transceiver module; the input end of the first sub-switch can selectively conduct the first output end of the first sub-switch and the second output end of the first sub-switch.

7. The radio frequency system according to claim 6, characterized in that: The radio frequency system further includes a control unit, the control unit being electrically connected to a control end of the first antenna switch and a control end of the first sub-switch; The control unit is used to control the fixed end of the first antenna switch to be connected to the first selection end, and the input end of the first sub-switch to be connected to the first receiving port of the first radio frequency transceiver module in a first time period, so that the first receiving port of the first radio frequency transceiver module receives the first sub-frequency band via the front-end receiving module, the first selection end of the first antenna switch, and the radiator; The control unit is used to control the fixed end of the first antenna switch to be connected to the first selection end, and the input end of the first sub-switch to be connected to the third RF transceiver module in the second time period, and the third RF transceiver module receives the second sub-frequency band via the front-end receiving module, the first selection end of the first antenna switch, and the radiator; The control unit is used to control the fixed end and the second selection end of the first antenna switch to be connected in a third time period, and the second receiving port of the first RF transceiver module receives the second frequency band via the front-end receiving module, the second selection end of the first antenna switch, and the radiator.

8. The radio frequency system according to claim 1, characterized in that: The RF system also includes a front-end transmitting module, one end of which is electrically connected to the first transmitting port of the first RF transceiver module, and the other end of which is electrically connected to the third selection end of the first antenna switch, and the front-end transmitting module is used to transmit a first frequency band.

9. The radio frequency system according to claim 8, characterized in that: The radio frequency system further includes a control unit, the control unit being electrically connected to a control end of the first antenna switch; The control unit is used to control the fixed end and the third selection end of the first antenna switch to be connected in a fourth time period, and the first RF transceiver module transmits the first frequency band via the front-end transmitting module, the third selection end of the first antenna switch, and the radiator.

10. The radio frequency system according to claim 1, characterized in that: The radiator is also used to receive a third frequency band; The radio frequency system further includes a fourth radio frequency transceiver module, which is electrically connected to a fourth selection end of the first antenna switch and is used to receive the third frequency band.

11. The radio frequency system according to claim 1, characterized in that: The radiator is also used to receive a third frequency band; The RF system also includes a second antenna switch and a fourth RF transceiver module, the fixed end of the second antenna switch is electrically connected to the second output end of the first combiner, the first selection end of the second antenna switch is electrically connected to the second receiving port of the first RF transceiver module, and the second selection end of the second antenna switch is electrically connected to the fourth RF transceiver module.

12. The radio frequency system according to claim 10 or 11, characterized in that: The first frequency band includes the L band of Beidou satellite signals and the GPS-L1 band; the second frequency band includes the S band of Beidou satellite signals; and the third frequency band includes the Wi-Fi 2.4G band or the Bluetooth band.

13. An electronic device, characterized in that: Comprising the radio frequency system as claimed in any one of claims 1 to 12.

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