A radio frequency system and electronic device

Abstract

The application provides a radio frequency system and an electronic device, relates to a terminal technical field, and aims to improve the sensitivity of a cellular frequency band receiving performance using a time division duplex (TDD) technology while reserving a filter in front of an LNA. The scheme comprises: a communication chip configured to receive and transmit a first radio frequency signal of a first frequency band of a first communication system and a second radio frequency signal of a second frequency band of a cellular mobile communication system; and a transceiver module, which comprises at least a first receiving link, a second receiving link and a third receiving link. The first receiving link is configured to receive the first radio frequency signal. The second receiving link and the third receiving link are both configured to receive the second radio frequency signal. The second receiving link is a channel between an antenna module and a first receiving port of the communication chip, which sequentially passes through a first filter circuit and a first low noise amplifier. The third receiving link is a channel between the antenna module and the first receiving port of the communication chip, which does not pass through the first filter circuit and passes through a third low noise amplifier.

Description

Technical Field

[0001] This application relates to the field of terminal technology, and in particular to a radio frequency system and electronic device. Background Technology

[0002] More and more electronic devices (such as mobile phones) support cellular and satellite communications. The receiving sensitivity of cellular bands directly affects the communication experience of mobile phones in weak signal environments. Currently, in the radio frequency systems of electronic devices, filters are typically placed between the low noise amplifier (LNA) and the antenna in the receiving link of cellular mobile communication systems to remove unwanted frequency components from the radio frequency signal received by the antenna. However, the filter located before the LNA in the receiving link of a cellular mobile communication system can be a significant source of noise figure (NF). Directly removing the filter before the LNA can easily affect the reliability of the LNA due to large out-of-band signals. Therefore, how to improve the receiving sensitivity of cellular bands using Time Division Duplex (TDD) technology while retaining the filter before the LNA is a pressing technical problem that needs to be solved. Summary of the Invention

[0003] This application provides a radio frequency system and electronic device for improving the sensitivity of cellular band reception performance using time-division duplex technology while retaining the filter in the LNA pre-stage.

[0004] To solve the above-mentioned technical problems, the embodiments of this application adopt the following technical solutions:

[0005] In a first aspect, embodiments of this application provide a radio frequency system applied in an electronic device, comprising: a communication chip for transmitting and receiving a first radio frequency signal in a first frequency band of a first communication system, and for transmitting and receiving a second radio frequency signal in a second frequency band of a cellular mobile communication system; and a transceiver module, comprising at least a first receiving link, a second receiving link, and a third receiving link; wherein the first receiving link is used to receive the first radio frequency signal in the first frequency band of the first communication system. The second and third receiving links are used to receive the second radio frequency signal in the second frequency band of the cellular mobile communication system. The second receiving link is a channel between the antenna module and the first receiving port of the communication chip, which sequentially passes through a first filter circuit and a first low-noise amplifier. The third receiving link is a channel between the antenna module and the first receiving port of the communication chip that does not pass through the first filter circuit.

[0006] The radio frequency system provided in this application embodiment has at least two receiving links in the communication module for a cellular mobile communication system, namely a second receiving link and a third receiving link. Both the second and third receiving links are used to receive the second radio frequency signal of the second frequency band of the cellular mobile communication system. The third receiving link is a channel between the antenna module and the first receiving port of the communication chip that does not pass through the first filtering circuit. The second receiving link is a channel between the antenna module and the first receiving port of the communication chip that passes through the first filtering circuit and the first low-noise amplifier in sequence. Therefore, in this application embodiment, when using the cellular mobile communication system for communication, either the second or third receiving link can be selected to receive the second radio frequency signal as needed. Since the third receiving link does not include the first filtering circuit, it is possible to achieve a design where the cellular frequency band using TDD technology does not use a filter before the LNA, thus reducing the sources of noise figure on the receiving link and improving the sensitivity of the cellular frequency band receiving performance.

[0007] In one possible implementation of this application, the first receiving link includes a second low-noise amplifier, the output of which is switchably connected to the input of the first low-noise amplifier or the second receiving port of the communication chip, and the second receiving port is connected to the first receiving link.

[0008] In this embodiment, the input of the second low-noise amplifier is connected to the antenna module, and the output of the second low-noise amplifier is connected to the input of the first low-noise amplifier to form a third receiving link. The input of the second low-noise amplifier is also connected to the antenna module, and the output of the second low-noise amplifier is connected to the receiving port of the communication chip to form a first receiving link. By switching the output of the second low-noise amplifier to either the input of the first low-noise amplifier or the second receiving port of the communication chip, the second low-noise amplifier of the first communication system can be reused to form a third receiving link for cellular communication. This scheme allows for a design where no filter is used before the first LNA in the cellular band without redesigning the cellular communication module or the first LNA. Furthermore, since the third receiving link also includes the first low-noise amplifier, two-stage gain processing can be achieved for the second radio frequency signal transmitted through the third receiving link.

[0009] In one possible implementation of this application, the first receiving link further includes a first switching module, which is connected to the output terminal of the second low-noise amplifier, the input terminal of the first low-noise amplifier, and the second receiving port, respectively. The first switching module is used to connect the output terminal of the second low-noise amplifier to the input terminal of the first low-noise amplifier; or, to connect the output terminal of the second low-noise amplifier to the second receiving port.

[0010] In one possible implementation of this application, the first receiving link includes a second low-noise amplifier, the output of which is switchably connected to either the first receiving port or the second receiving port of the communication chip, and the second receiving port is connected to the first receiving link.

[0011] In this design, the input of the second low-noise amplifier is connected to the antenna module, and the output of the second low-noise amplifier is connected to the first communication port to form a third receiving link. The input of the second low-noise amplifier is also connected to the antenna module, and the output of the second low-noise amplifier is connected to the receiving port of the communication chip to form a first receiving link. This solution allows for a design where no filter is used before the first LNA in the cellular frequency band without requiring a redesign of the cellular communication module or the first LNA.

[0012] In one possible implementation of this application, the first receiving link further includes a first switching module, which is connected to the output of the second low-noise amplifier, the first receiving port, and the second receiving port respectively. The first switching module is used to connect the output of the second low-noise amplifier to the first receiving port; or, to connect the output of the second low-noise amplifier to the second receiving port.

[0013] In one possible implementation of this application, the first receiving link further includes a second filtering circuit connected in series between the second receiving port and the first switching module. Specifically, the first switching module is used to switchably connect the output of the second low-noise amplifier to the input of the first low-noise amplifier or the second filtering circuit. Through the second filtering circuit between the second receiving port and the first switching module, the first radio frequency signal can be filtered, and the filtered first radio frequency signal can be fed into the communication chip through the second receiving port. The second filtering circuit can be used to filter the first radio frequency signal to the frequency band required for satellite communication, filtering out out-of-band interference.

[0014] In one possible implementation of this application, the second receiving link further includes a second switching module, which is used to switchably connect the input terminal of the first low-noise amplifier to the output terminal of the second low-noise amplifier or the output terminal of the first filter circuit, wherein the input terminal of the first filter circuit is connected to the antenna module.

[0015] In one possible implementation of this application, the antenna module includes at least one antenna; the radio frequency system further includes a third switching module connected to the at least one antenna, which is used to switch the at least one antenna to the input of the first filter circuit or the second low-noise amplifier. By using the third switching module, the first communication system and the cellular mobile communication system can reuse the same antenna for communication. Taking a satellite communication system as an example, the at least one antenna can be a satellite communication antenna operating in the satellite communication frequency band and a cellular communication antenna operating in the cellular communication frequency band.

[0016] In one possible implementation of this application, the antenna module includes at least one first antenna and at least one second antenna; the at least one first antenna is connected to a first receiving link and a third receiving link; and the at least one second antenna is connected to a second receiving link. Taking a satellite communication system as an example, this scheme allows the satellite communication system and the cellular mobile communication system to use different communication antennas.

[0017] In one possible implementation of this application, the second antenna is a cellular communication antenna operating in the cellular communication frequency band; the first antenna is a satellite communication antenna operating in the satellite communication frequency band and a cellular communication antenna operating in the cellular communication frequency band.

[0018] In one possible implementation of this application, the second receiving link further includes a fourth switching module. This fourth switching module is used to switchably connect the input of the first low-noise amplifier to the first filter circuit to form the second receiving link, or bypass the first filter circuit to connect to the antenna module to form a third receiving link. This solution, through improvements to the cellular communication module, enables a design where no filter is used before the LNA in the cellular band.

[0019] In one possible implementation of this application, the third receiving link may further include a third low-noise amplifier located between the antenna module and the first receiving port, the output of which is connected to the first receiving port, and the input of which is connected to the antenna module to form the third receiving channel.

[0020] In a second aspect, embodiments of this application provide an electronic device including a radio frequency system as described in the first aspect or any possible embodiment of the first aspect. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a radio frequency system in the related technology provided in the embodiments of this application. Figure 1 ;

[0022] Figure 2This is a schematic diagram of the structure of a radio frequency system in the related technology provided in the embodiments of this application. Figure 2 ;

[0023] Figure 3 This is a schematic diagram of the structure of a radio frequency system provided in an embodiment of this application;

[0024] Figure 4 This is a schematic diagram of the structure of a radio frequency system provided in an embodiment of this application. Figure 2 ;

[0025] Figure 5 This is a schematic diagram of the structure of a radio frequency system provided in an embodiment of this application. Figure 3 ;

[0026] Figure 6 This is a schematic diagram of the structure of a radio frequency system provided in an embodiment of this application. Figure 4

[0027] Figure 7 This is a schematic diagram of the structure of a radio frequency system provided in an embodiment of this application. Figure 5 ;

[0028] Figure 8 This is a schematic diagram of the structure of a radio frequency system provided in an embodiment of this application. Figure 6 . Detailed Implementation

[0029] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0030] In the description of this application, unless otherwise stated, " / " indicates that the objects before and after are in an "or" relationship. For example, A / B can represent A or B. "And / or" in this application merely describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone, where A and B can be singular or plural. Furthermore, in the description of this application, unless otherwise stated, "multiple" refers to two or more. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple. Additionally, to facilitate a clear description of the technical solutions of the embodiments of this application, the terms "first" and "second" are used in the embodiments of this application to distinguish identical or similar items with essentially the same function and effect. Those skilled in the art will understand that the words "first" and "second" do not limit the quantity or the order of execution, and that the words "first" and "second" do not necessarily imply that they are different.

[0031] In the various method embodiments of this application, the order of the sequence numbers does not imply the order of execution. The execution order should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0032] It is understood that in this application, descriptions such as "under the circumstances," "if," "when," and "if..." can be used interchangeably. Furthermore, these descriptions all refer to the corresponding actions that will be taken under certain objective circumstances, and are not time-limited, nor do they require any judgment action during implementation, nor do they imply any other limitations.

[0033] It is understood that in this application, "greater than or equal to" can be replaced with "greater than", and correspondingly, "less than" can also be replaced with "less than or equal to".

[0034] It is understood that some optional features in the embodiments of this application can be implemented independently in certain scenarios without relying on other features, such as the current solution on which they are based, to solve the corresponding technical problems and achieve the corresponding effects. Alternatively, they can be combined with other features as needed in certain scenarios. Correspondingly, the apparatus given in the embodiments of this application can also implement these features or functions, which will not be elaborated here.

[0035] In this application, unless otherwise specified, the same or similar parts between the various embodiments can be referred to each other. In the various embodiments of this application, and in the various implementation methods / methods / implementations within each embodiment, unless otherwise specified or logically conflicting, the terminology and / or descriptions between different embodiments and between the various implementation methods / methods / implementations within each embodiment are consistent and can be mutually referenced. The technical features in different embodiments and the various implementation methods / methods / implementations within each embodiment can be combined according to their inherent logical relationships to form new embodiments, implementation methods, methods, or implementation approaches. The embodiments described below do not constitute a limitation on the scope of protection of this application.

[0036] Cellular communication technology transmits signals through ground-based base stations, while satellite communication technology transmits signals through satellites. Satellite communication consists of three parts: the satellite segment, the ground segment, and the user segment. The satellite segment acts as a relay station in the air, amplifying electromagnetic waves transmitted from ground stations and sending them back to another ground station. The ground segment mainly consists of multiple ground stations performing different services. Ground stations are the interface between the satellite system and the public terrestrial network, and ground users can also use ground stations to access the satellite system and form links. Ground stations also include the ground satellite control center and its tracking, telemetry, and command stations. The user segment consists of various electronic devices.

[0037] Satellites in satellite communications can provide location services to devices on the ground, transmit short messages received from devices to terrestrial cellular networks, and provide voice calls and data services to devices on the ground.

[0038] The radio frequency system provided in this application can be applied to electronic devices. For example, the electronic device in this application can be an electronic device that supports both a first communication system and cellular communication, such as a smartphone. Of course, the electronic device can also be other electronic devices that support both satellite communication and cellular communication, besides smartphones, and this application does not limit this. For example, the first communication system can be a satellite communication system. Of course, the first communication system can also be other systems besides satellite communication systems, and this application does not limit this.

[0039] Time Division Duplex (TDD) technology is a technique that uses time to separate the received and transmitted signals. That is, the transmission and reception of signals are carried out in different time slots of the same frequency channel, and a certain guarantee time is used to separate them.

[0040] like Figure 1 As shown, Figure 1 This is a structural diagram of a radio frequency system applied in electronic devices, provided in the related art, such as... Figure 1As shown, the radio frequency system includes a communication chip 101, a cellular communication module 102, and a satellite receiving link 103.

[0041] The cellular communication module 102 supports cellular communication in electronic devices. For example, the cellular communication module 102 may include a cellular receiving link and a cellular transmitting link. Both the cellular receiving link and the cellular transmitting link are connected to the antenna 104. The cellular receiving link transmits the second radio frequency signal of the second frequency band of the cellular mobile communication system received by the antenna 104 and sends it to the communication chip 101. Alternatively, the cellular transmitting link transmits the second radio frequency signal of the second frequency band of the cellular mobile communication system transmitted by the communication chip 101 to the antenna 104.

[0042] It is understood that antenna 104 can function as both a receiving antenna and a transmitting antenna. Of course, in other embodiments, the cellular receiving link and the cellular transmitting link may correspond to different first antennas, and this application does not limit this. Antenna 104 may include one or more antennas.

[0043] As an example, the satellite receiving link 103 is used to receive a first radio frequency signal of a first frequency band of a satellite communication system through the antenna 104. The satellite receiving link 103 includes a low-noise amplifier 1031 and a second filter 1032. The low-noise amplifier 1031 performs gain processing on the first radio frequency signal of the first frequency band of the satellite communication system received through the antenna 104 and then transmits it to the filter 1032. After the filter 1032 filters out unwanted frequency bands, the signal is transmitted to the communication chip 101.

[0044] Optionally, the radio frequency system may also include a satellite transmission link (not shown in the figure), which is used to transmit a first radio frequency signal of the first frequency band of the satellite communication system transmitted by the communication chip 101 to the antenna 104.

[0045] like Figure 1 As shown, the cellular receiving link may include a single-pole multi-throw (SPMD) switch 1021, a filter 1022, and a low-noise amplifier 1023. The first terminal 10211 of the SPMD switch 1021 is connected to the antenna 104, the second terminal 10212 of the SPMD switch 1021 is connected to the input terminal of the filter 1022, the output terminal of the filter 1022 is connected to the input terminal of the low-noise amplifier 1023, and the output terminal of the low-noise amplifier 1023 is connected to the receiving port RX1 of the communication chip 101, such as a cellular communication receiving port. This cellular communication receiving port is used to receive the second radio frequency signal of the second frequency band of the cellular mobile communication system.

[0046] Specifically, in the receiving scenario of cellular communication, the first terminal 10211 and the second terminal 10212 of the single-pole multi-throw switch device 1021 are turned on to enable the cellular receiving link to be turned on. Therefore, after the antenna 104 receives the second radio frequency signal of the second frequency band of the cellular mobile communication system, it is fed into the cellular communication receiving port through the cellular receiving link.

[0047] like Figure 1 As shown, the cellular transmission link may include a power amplifier 1024, a single-pole multi-throw (SPMD) switch 1025, and a filter 1026 connected to the first transmit port TX1 of the communication chip 101. The input terminal of the power amplifier 1024 is connected to the first transmit port TX1 of the communication chip 101, and the output terminal of the power amplifier 1024 is connected to the first terminal 10251 of the SPMD switch 1025. The second terminal 10252 of the SPMD switch 1025 is connected to the filter 1026, and the output terminal of the filter 1026 is connected to the third terminal 10213 of the SPMD switch 1025.

[0048] In the transmission scenario of a cellular mobile communication system, by connecting the first terminal 10211 of the single-pole multi-throw switch device 1021 to the third terminal 10213 of the single-pole multi-throw switching module 1021, the second radio frequency signal transmitted by the communication chip 101 is amplified by the power amplifier 304 and filtered by the filter 1026. After filtering, it is transmitted to the antenna 104 via the single-pole multi-throw switch device 1021.

[0049] In the embodiments of this application, filter 1022 and filter 1026 may be the same filter or different filters. Filter 1022 and filter 1026 may include one or more filters.

[0050] like Figure 2 As shown, Figure 2 This is a structural diagram of another radio frequency system used in electronic devices. Figure 2 The structure shown is Figure 1 The structural difference shown is that the satellite communication system and the cellular mobile communication system share a single antenna 1027. In this case, the fourth terminal 10214 of the single-pole multi-throw switch 1021 is also connected to the input terminal of the second low-noise amplifier 1031. Figure 1 The input terminal of the low-noise amplifier 1031 is connected to the antenna 104.

[0051] exist Figure 2The system shown can use a single-pole multiple-throw (SPMD) switch 1021 to enable the satellite receiving link or the cellular receiving link. For example, during the reception process in a satellite communication scenario, the first terminal 10211 of the SPMD switch 1021 is connected to the fourth terminal 10214 of the SPMD switch 1021, so that the satellite receiving link between the antenna 1027 and the second receiving port (RX2) is enabled. Therefore, the first radio frequency signal received by the antenna 1027 is transmitted to the second receiving port RX2 via the satellite receiving link, and is fed into the communication chip 101 through the second receiving port (also referred to as the satellite communication receiving port) of the communication chip 101.

[0052] During the reception process in a cellular communication scenario, the first end 10211 of the single-pole multi-throw switch device 1021 is connected to the second end 10212 of the single-pole multi-throw switching module 1021, so that the cellular receiving link between the antenna 1027 and the first receiving port (RX1) is connected. In this way, the second radio frequency signal received by the antenna 1027 can be transmitted through the cellular receiving link and fed into the communication chip 101 through the first receiving port (RX1) of the communication chip 1031.

[0053] In the aforementioned radio frequency system, for cellular communication, the radio frequency signal received by the antenna is typically a complex signal containing multiple frequency components. This includes the desired signal but may also include a large amount of interference signals, noise, and signals from adjacent frequency bands. Such signals can degrade the performance of the communication system. Therefore, a filter 1022 is usually placed between the low-noise amplifier 1023 and the first antenna 104 or between the low-noise amplifier 1023 and the antenna 1027 in the cellular receiving link. Although the filter 1022 can filter out interference frequency bands in the received second radio frequency signal, the filter 1022, located before the low-noise amplifier 1023, is a significant source of interference (NF). Removing the filter 1022 before the low-noise amplifier 1023 would fail to filter out large out-of-band signals in the second radio frequency signal, making the second radio frequency signal carrying large out-of-band signals susceptible to affecting the reliability of the low-noise amplifier 1022. Therefore, how to improve the sensitivity of the cellular band receiving performance using TDD communication technology while retaining the filter 1022 before the low-noise amplifier 1023 remains a technical problem to be solved.

[0054] Based on this, this application provides a radio frequency system that can improve the sensitivity of cellular band reception performance by adding an additional cellular reception link without a filter, while retaining the filter in the pre-stage of the low-noise amplifier in the original cellular reception link.

[0055] like Figure 3 As shown, Figure 3This is a schematic diagram of the structure of a radio frequency system provided in an embodiment of this application. The communication system includes a communication chip 300 and a transceiver module 400.

[0056] The communication chip 300 is used to transmit and receive first radio frequency signals in the first frequency band of the first communication system, and to transmit and receive second radio frequency signals in the second frequency band of the cellular mobile communication system. For example, if the first communication system is a satellite communication system, then the first frequency band is the satellite communication frequency band. The second frequency band is the cellular communication frequency band. For example, the frequency bands commonly used in satellite communication include L-band (1-2GHz), S-band (2-4GHz), and C-band (4-8GHz).

[0057] The transceiver module 400 includes at least a first receiving link 60, a second receiving link 40, and a third receiving link 50;

[0058] The first receiving link 60 is used to receive a first radio frequency signal of a first frequency band of the first communication system. The second receiving link 40 and the third receiving link 50 are used to receive radio frequency signals of a second frequency band of the cellular mobile communication system.

[0059] For example, the first receiving link 60 is at least the receiving link between the second receiving port 302 of the communication chip 300 and the antenna module 500.

[0060] For example, the second receiving link 40 and the third receiving link 50 are receiving links between the first receiving port 301 of the communication chip 300 and the antenna module 500.

[0061] The second receiving link 40 is at least used to transmit the second radio frequency signal received by the antenna module 500 to the communication chip 300 after being processed by the first filter circuit 402 and the first low noise amplifier 401.

[0062] The first low-noise amplifier 401 is used to perform gain processing on the second radio frequency signal. The first filter circuit 402 is used to filter the second radio frequency signal.

[0063] The third receiving link 50 is at least used to enable the second radio frequency signal to bypass the first filter circuit 402 and be transmitted through at least one low-noise amplifier. In other words, the third receiving link 50 is a link between the antenna module 500 and the first receiving port 301 of the communication chip 300 that bypasses the first filter circuit 402 but passes through at least one low-noise amplifier.

[0064] Understandably, no filtering circuitry is provided in the third receive link 50 between the antenna module and at least one low-noise amplifier.

[0065] It is understood that the second receiving link 40 includes at least a first filtering circuit 402 and a first low-noise amplifier 401. The input of the first filtering circuit 402 is connected to the antenna module 500, and the output of the first filtering circuit 402 is connected to the input of the first low-noise amplifier 401. The output of the first low-noise amplifier 401 is connected to the first receiving port 301 of the communication chip 300. The second receiving link 40 is the channel between the antenna module 400 and the first receiving port 301 of the communication chip 101, which sequentially passes through the first filtering circuit 402 and the first low-noise amplifier 401. The third receiving link 50 is the channel between the antenna module 500 and the first receiving port 301 of the communication chip 300 that does not pass through the first filtering circuit 402.

[0066] The radio frequency system provided in this application embodiment has at least two receiving links in the communication module for a cellular mobile communication system: a second receiving link and a third receiving link. Both the second and third receiving links are used to receive the second radio frequency signal of the second frequency band of the cellular mobile communication system. The third receiving link is a channel between the antenna module and the first receiving port of the communication chip that does not pass through the first filtering circuit. The second receiving link is a channel between the antenna module and the first receiving port of the communication chip that passes through the first filtering circuit and the first low-noise amplifier in sequence. Therefore, in this application embodiment, when using the cellular mobile communication system for communication, either the second or third receiving link can be selected to receive the second radio frequency signal as needed. Since the third receiving link does not include the first filtering circuit, using the third receiving link to receive the second radio frequency signal can achieve a design where no filter is used before the LNA in the cellular frequency band using TDD technology. Therefore, the sources of noise figure on the receiving link can be reduced, and the sensitivity of the cellular frequency band receiving performance can be improved.

[0067] In one possible embodiment of this application, at least one low-noise amplifier may include one or more of a first low-noise amplifier 401 and a second low-noise amplifier 601. For example, at least one low-noise amplifier may include a first low-noise amplifier 401. Since the first low-noise amplifier 401 is an existing low-noise amplifier in the current cellular receiving link (i.e., the second receiving link 40) in the cellular communication module, a second switching module can be set in the cellular communication module so that the input terminal of the first low-noise amplifier 401 can be selectively connected to a first filter circuit 402 to form the second receiving link 40 or connected to an antenna module 500 to form a third receiving link 50. At least one low-noise amplifier may include a first low-noise amplifier 401 and a second low-noise amplifier 601, wherein the second low-noise amplifier 601 is a pre-stage low-noise amplifier of the first low-noise amplifier 401. In this scenario, the output terminal of the second low-noise amplifier 601 can be switchably connected to the input terminal of the first low-noise amplifier 401 to form the third receiving link 50. For example, at least one low-noise amplifier may include a second low-noise amplifier 601, in which the output of the second low-noise amplifier 601 may be switchably connected to the first receiving port 301 to form a third receiving link 50.

[0068] Of course, in some embodiments, at least one low-noise amplifier may further include a third low-noise amplifier connected in series between the antenna module 500 and the first receiving port 301.

[0069] The third low-noise amplifier can be a newly added low-noise amplifier in the cellular communication module.

[0070] In one possible embodiment of this application, the transceiver module 400 may include a cellular communication module a and a satellite communication module b. The cellular communication module a is used to implement cellular communication, such as receiving and transmitting a second radio frequency signal in the cellular communication frequency band. The satellite communication module b is used to implement satellite communication, such as transmitting and receiving a first radio frequency signal in the satellite communication frequency band.

[0071] Cellular communication module a may include the second receiving link 40 and the third receiving link 50 described above. Satellite communication module b may include the first receiving link 60 described above.

[0072] Optionally, the cellular communication module a may also include a cellular transmission link. The cellular transmission link is used to transmit a second radio frequency signal transmitted by the communication chip 300 through the first transmission port TX1. The structure of the cellular transmission link is as follows: Figure 1 and Figure 2 As shown, it will not be elaborated further here.

[0073] Satellite communication module b may also include a satellite transmission link for transmitting the first radio frequency signal transmitted by communication chip 300 through the second transmission port TX2.

[0074] As an example, the communication chip 300 may include a radio frequency integrated circuit (RFIC) and a baseband. The baseband works in conjunction with the transceiver module 400 to transmit and receive wireless signals. For instance, the RFIC is primarily responsible for processing the radio frequency signals. The baseband transmits the processed digital signals to the transceiver module 400 for modulation and power amplification before transmission, and simultaneously receives the radio frequency signals from the transceiver module 400 for demodulation and decoding.

[0075] In addition to supporting cellular communication, the radio frequency integrated circuit in this embodiment also has satellite communication capabilities, such as processing satellite communication signals and enabling functions such as satellite phone calls and satellite data transmission.

[0076] As an example, radio frequency integrated circuits (RFICs) can include satellite RFICs and cellular RFICs. Both satellite and cellular RFICs are connected via baseband. Of course, the satellite RFIC and cellular RFIC can also be the same RFIC. The satellite RFIC is primarily used to process the first radio frequency signal, while the cellular RFIC is used to process the second radio frequency signal.

[0077] In this embodiment, a second low-noise amplifier from a cellular mobile communication system can be used to form a third receiving link 50 to receive a second radio frequency signal.

[0078] The following describes how the second low-noise amplifier of the satellite communication system is reused to form the third receive link 50.

[0079] In one possible embodiment of this application, such as Figures 3-5 As shown, the first receiving link includes a second low-noise amplifier 601. The input of the second low-noise amplifier 601 is connected to the antenna module 500, and the output of the second low-noise amplifier 601 can be switched to the input of the first low-noise amplifier 401 or the second receiving port 302 of the communication chip 300. The second low-noise amplifier 601 is connected to the input of the first low-noise amplifier 401 to form a third receiving link. The output of the second low-noise amplifier 601 is connected to the second receiving port 302 of the communication chip 300 to form the first receiving link.

[0080] It is understandable that when the input terminal of the second low-noise amplifier 601 is connected to the antenna module 500, and the output terminal of the second low-noise amplifier 601 is connected to the input terminal of the first low-noise amplifier 401, a third receiving link 50 can be formed to receive the second radio frequency signal of the second frequency band of the cellular mobile communication system. Since there is no filtering circuit between the second low-noise amplifier 601 and the antenna module 500, the third receiving link formed can improve the receiving performance of the cellular mobile communication system when used as the receiving link of the cellular mobile communication system.

[0081] It is understandable that when the input of the second low-noise amplifier 601 is connected to the antenna module 500 and the output of the second low-noise amplifier 601 is connected to the second receiving port 302 of the communication chip 200, a first receiving link can be formed. In this way, the first radio frequency signal of the first frequency band of the satellite communication system can be received through the antenna module 500. Since the first receiving link is connected to the second receiving port 302 of the communication chip 300, the received first radio frequency signal can be fed into the communication chip 300 through the second receiving port 302.

[0082] As an example, such as Figure 4 or Figure 5 As shown, the first receiving link 60 also includes a first switching module 602. The first switching module 602 is connected to the output terminal of the second low-noise amplifier 601, the input terminal of the first low-noise amplifier 401, and the second receiving port 302 of the communication chip 300, respectively. The first switching module 602 is used to enable the output terminal of the second low-noise amplifier 601 to be switchably connected to the input terminal of the first low-noise amplifier 401 to form a third receiving link 50 or connected to the second receiving port 302 of the communication chip 300 to form a first receiving link 60.

[0083] As an example, the first switching module 602 can be implemented using a switching device, such as a single-pole double-throw switch or a single-pole multi-throw switch. For instance, the first switching module 602 can have a first terminal 6021, a second terminal 6022, and a third terminal 6023. The first terminal 6021 of the first switching module 602 is connected to the antenna module 500. The second terminal 6022 of the first switching module 602 is connected to the input terminal of the first low-noise amplifier 401. The third terminal 6023 of the first switching module 602 is connected to the second receiving port 302 of the communication chip 300.

[0084] In this embodiment, a first switching module 602 is set in the first receiving link 60, and then the output of the second low noise amplifier 601 is switched to the input of the first low noise amplifier 401 to form a third receiving link 50 or connected to the second receiving port 302 of the communication chip 300 to form the first receiving link 60. This solution can improve the receiving performance of the cellular mobile communication system without redesigning the cellular communication module.

[0085] For example, such as Figure 4 or Figure 5 As shown, when the third receiving link 50 is needed to receive the second radio frequency signal, the first switching module 602 can be controlled to open the path between the output of the second low noise amplifier 601 and the input of the first low noise amplifier 401. In this way, the antenna module 400 receives the second radio frequency signal, which is then amplified by the second low noise amplifier 601. Since the first switching module 602 opens the path between the output of the second low noise amplifier 601 and the input of the first low noise amplifier 401, the second radio frequency signal is amplified a second time by the first low noise amplifier 401 and then transmitted to the communication chip 300. This enables the cellular mobile communication system to reuse the second LNA of the satellite communication system to improve the receiving performance.

[0086] In one possible embodiment of this application, the cellular communication module further includes a third low-noise amplifier, and the first receiving link 60 includes a second low-noise amplifier 601. The output of the second low-noise amplifier 601 is switchably connected to either the third low-noise amplifier or the second receiving port 302 of the communication chip 300. The output of the second low-noise amplifier 601 is connected to the input of the third low-noise amplifier via a first switching module 602 to form a third receiving link 50. The output of the third low-noise amplifier is connected to the first receiving port 301 of the communication chip 300. The output of the second low-noise amplifier 601 is connected to the second receiving port 302 of the communication chip 300 to form the first receiving link 60.

[0087] It is understandable that when the input terminal of the second low-noise amplifier 601 is connected to the antenna module 500, and the output terminal of the second low-noise amplifier 601 is connected to the input terminal of the third low-noise amplifier through the first switching module 602, a third receiving link 50 can be formed to receive the second radio frequency signal of the second frequency band of the cellular mobile communication system. Since there is no filtering circuit between the second low-noise amplifier 601 and the antenna module 500, the third receiving link 50 formed can improve the receiving performance of the cellular mobile communication system when used as the receiving link of the cellular mobile communication system.

[0088] This scheme adds a third low-noise amplifier to the existing cellular communication module and reuses the second low-noise amplifier 601 of the satellite communication system to form a third receiving link 50. Since there is no filtering circuit between the second low-noise amplifier 601 and the antenna module 500, the formed third receiving link 50 can improve the receiving performance of the cellular mobile communication system. In addition, this scheme can also realize two-stage LNAs in the third receiving link 50.

[0089] In one possible embodiment of this application, the first receiving link 60 includes a second low-noise amplifier 601, which is switchably connected to either the first receiving port 301 or the second receiving port 302 of the communication chip 300. The second low-noise amplifier 601 is connected to the first receiving port 301 of the communication chip 300 to form a third receiving link 50. The output of the second low-noise amplifier 601 is connected to the second receiving port 302 of the communication chip 300 to form the first receiving link 60.

[0090] It is understandable that when the input terminal of the second low-noise amplifier 601 is connected to the antenna module 500, and the output terminal of the second low-noise amplifier 601 is connected to the first receiving port 301 of the communication chip 300, a third receiving link 50 can be formed to receive the second radio frequency signal of the second frequency band of the cellular mobile communication system. This scheme can enable the cellular mobile communication system to reuse the second low-noise amplifier 601 of the satellite communication system to form the third receiving link 50. Since there is no filtering circuit between the second low-noise amplifier 601 and the antenna module 500 in the third receiving link 50, the formed third receiving link 50 can improve the receiving performance of the cellular mobile communication system.

[0091] It is understandable that when the input of the second low-noise amplifier 601 is connected to the antenna module 500 and the output of the second low-noise amplifier 601 is connected to the second receiving port 302 of the communication chip 300, a first receiving link 60 can be formed. In this way, the first radio frequency signal of the first frequency band of the satellite communication system can be received through the antenna module 500. Since the first receiving link 60 is connected to the second receiving port 302 of the communication chip 100, the received first radio frequency signal can be fed into the communication chip 100 through the second receiving port 302.

[0092] As an example, such as Figure 4 or Figure 5As shown, the first receiving link 60 also includes a first switching module 602. The first switching module 602 is connected to the output terminal of the second low-noise amplifier 601, the input terminal of the first low-noise amplifier 401 (which can also be a third low-noise amplifier or the first communication port 301), and the second receiving port 302 of the communication chip 300, respectively. The first switching module 602 is used to enable the output terminal of the second low-noise amplifier 601 to be switchably connected to the input terminal of the first low-noise amplifier 401 (which can also be a third low-noise amplifier or the first communication port 301) to form a third receiving link 50, or to be connected to the second receiving port 302 of the communication chip 300 to form a first receiving link 60.

[0093] As an example, the first switching module 602 can be implemented using a switching device, such as a single-pole double-throw switch or a single-pole multi-throw switch. For instance, the first switching module 602 can have a first terminal 6021, a second terminal 6022, and a third terminal 6023. The first terminal 6021 of the first switching module 602 is connected to the output terminal of the second low-noise amplifier 601. The second terminal 6022 of the first switching module 602 is connected to the second receiving port 302 of the communication chip 300. The third terminal 6023 of the first switching module 602 is connected to the input terminal of the first low-noise amplifier 401.

[0094] In one possible embodiment of this application, optionally, such as Figure 4 or Figure 5 As shown, the first receiving link 60 also includes a second filtering circuit 603. The second filtering circuit 603 is connected in series between the second receiving port 302 of the communication chip 300 and the first switching module 602. For example, the input terminal of the second filtering circuit 603 is connected to the third terminal 6023 of the first switching module 602. The output terminal of the second filtering circuit 603 is connected to the second receiving port 302 of the communication chip.

[0095] The first switching module 602 is specifically used to enable the output terminal of the second low-noise amplifier 603 to be switchably connected to the input terminal of the first low-noise amplifier 401 or the input terminal of the second filter circuit 603.

[0096] By providing a second filtering circuit 603 on the first receiving link 60, interference signals in the first radio frequency signal can be filtered out. The second filtering circuit 603 in this embodiment may include one or more filters.

[0097] In one possible embodiment of this application, such as Figure 4 or Figure 5As shown, the second receiving link 50 also includes a second switching module 403. The second switching module 403 is used to switchably connect the input of the first low-noise amplifier 401 to either the output of the second low-noise amplifier 601 or the output of the first filter circuit 402, the input of which is connected to the antenna module 500.

[0098] As an example, the second switching module 403 can use a single-pole multi-throw switch or a multi-pole multi-throw switch. The second switching module 403 includes at least a first terminal 4031, a second terminal 4032, and a third terminal 4033. The first terminal 4031 of the second switching module 403 can be connected to the input terminal of the first low-noise amplifier 401, and the second terminal 4032 of the second switching module 403 can be connected to the third terminal 6023 of the first switching module 402. The third terminal 4033 of the second switching module 403 can be connected to the output terminal of the first filter circuit 402.

[0099] It is understood that the input terminal of the first filter circuit 402 in this embodiment can be directly connected to the antenna module 500, or the input terminal of the first filter circuit 402 can be connected to the antenna module 500 through the third switching module 700.

[0100] Specifically, in a scenario where the cellular transmit link and the cellular receive link share a single antenna module 500, the input of the first filter circuit 402 can be connected to the antenna module 500 via the third switching module 700. In this scenario where cellular transmission is required, the first terminal 7001 of the third switching module 700 can be connected to the fourth terminal 7004 of the third switching module 700 to enable the cellular transmit link between the antenna module 500 and the first transmit port TX1. In a scenario where cellular reception is required, the first terminal 7001 of the third switching module 700 can be connected to the second terminal 7002 of the third switching module 700.

[0101] In one possible implementation of this application, such as Figure 5 As shown, in this embodiment of the application, the antenna module 500 includes at least one antenna 503. The at least one antenna 503 is connected to the input terminals of the first filter circuit 402 and the second low-noise amplifier 601 through a third switching module 700. The third switching module 700 is used to connect the at least one antenna 503 to the input terminal of the first filter circuit 402 or to the input terminal of the second low-noise amplifier 601.

[0102] It is understandable that in scenarios where satellite communication systems and cellular mobile communication systems share at least one antenna 503, in cellular communication scenarios, the receiving link of an electronic device can be switched to the second receiving link 40 by using the third switching module 700 to connect at least one antenna 503 and the input terminal of the first filter circuit 402.

[0103] Specifically, the third switching module 700 may include multiple ports, such as at least a first port 701, a second port 702, and a third port 703. The first port 701 of the third switching module 700 is connected to the antenna module 500, the second port 702 of the third switching module 700 is connected to the input of the first filter circuit 402, and the second port 703 of the third switching module 700 is connected to the input of the second low-noise amplifier 601.

[0104] For example, such as Figure 6 As shown, in a scenario where antenna module 400 is required to receive a second radio frequency signal, i.e., to achieve cellular communication, the first terminal 701 of the third switching module 700 is connected to the second terminal 702 of the third switching module 700, and the first terminal 4031 of the second switching module 403 is connected to the output terminal of the first filter circuit 402, so that the second receiving link 40 between antenna module 500 and first receiving port 301 is connected. In this way, the second radio frequency signal received by antenna module 500 is transmitted to the first filter circuit 402 for filtering via the third switching module 700. The filtered second radio frequency signal enters the first low noise amplifier 401 for gain processing via the second switching module 403 and then enters the communication chip 300 through the first receiving port 301.

[0105] like Figure 7 As shown, in a scenario where antenna module 400 is needed to receive the second radio frequency signal, i.e., to achieve cellular communication, the first terminal 701 of the third switching module 700 is connected to the third terminal 703 of the third switching module 700, and the first terminal 6021 of the first switching module 602 is connected to the third terminal 6023 of the first switching module 602. The first terminal 4031 of the second switching module 403 is connected to the second terminal 4032 of the second switching module 403, so that the third receiving link 50 is connected. At this time, the third receiving link 50 includes a second low-noise amplifier 601 and a first low-noise amplifier 401. Since the first switching module 602 is used in this scheme to bypass the first filter circuit 402, the second radio frequency signal bypasses the first filter circuit 402 when transmitted through the third receiving link 50 and passes through the second low-noise amplifier 601 and the first low-noise amplifier 401 in sequence to be transmitted to the communication chip 300.

[0106] As an example, the third switching module 700 can be deployed in the aforementioned cellular communication module a.

[0107] In this embodiment, whether to use the second receiving link 40 or the third receiving link 50 to receive the second radio frequency signal in a cellular communication scenario can be determined by the processor. Optionally, in this embodiment, the first switching module 602, the third switching module 700, and the second switching module 403 are all connected to the processor. The processor is used to control the first switching module 602 to connect the link between the output terminal and the input terminal of the second low-noise amplifier 601, and to control the first switching module 602 to connect the link between the output terminal of the second low-noise amplifier 601 and the second receiving port 302 of the communication chip 300. The processor is used to control the third switching module 700 to switch at least one antenna to the input terminal of the first filter circuit 402 or the input terminal of the second low-noise amplifier 601.

[0108] like Figure 8 As shown, in a satellite communication scenario, by using a third switching module 700 to connect at least one antenna 503 and the input of the second low-noise amplifier 601, and if the first switching module 602 connects the output of the second low-noise amplifier 601 to the input of the second filter circuit 603, the receiving link of the electronic device can be switched to the first receiving link 60.

[0109] It is understood that the at least one antenna 503 can be a common antenna for both cellular mobile communication systems and satellite communication systems. The at least one antenna 503 can include a receiving antenna, which is a communication antenna that operates in both satellite communication frequency bands and cellular communication frequency bands. Of course, the at least one antenna can be an antenna that supports both receiving and transmitting, and this application embodiment does not limit this.

[0110] In one possible implementation of this application, such as Figure 4 As shown, in this embodiment of the application, the antenna module includes at least one first antenna 501 and at least one second antenna 502. The at least one first antenna 502 is connected to the input terminal of the second low-noise amplifier 601, and the at least one second antenna 501 is connected to the first filter circuit 402. Optionally, the at least one second antenna 501 is connected to the first filter circuit 402 through a third switching module 700.

[0111] Specifically, at least one second antenna 501 is connected to the first terminal 701 of the third switching module 700, and the second terminal of the third switching module 700 is connected to the input terminal of the first filter circuit 402.

[0112] In one possible implementation of this application, the second antenna is a cellular communication antenna operating in the cellular communication frequency band; the second antenna is a satellite communication antenna operating in the satellite communication frequency band and a cellular communication antenna operating in the cellular communication frequency band.

[0113] In one possible implementation of this application, such as Figure 5 As shown, in this embodiment of the application, the second receiving link 40 further includes a fourth switching module. The fourth switching module is used to enable the input terminal of the first low noise amplifier to be switchably connected to the first filter circuit 402, or to bypass the first filter circuit 402 and connect to the antenna module 500 to form the third receiving link 50.

[0114] Of course, the above example shows the structure of the third receiving link 50 multiplexing the second low-noise amplifier 601. In practice, the third receiving link can also include a third low-noise amplifier, that is, the second receiving link 40 and the third receiving link 50 use different low-noise amplifiers. In this scheme, a third low-noise amplifier can be added to an existing cellular module. The input of the third low-noise amplifier is connected to the antenna module, and the output of the third low-noise amplifier is connected to the first receiving port 301 to form the third receiving link 50.

[0115] It is understandable that when different low-noise amplifiers are used in the second receiving link 40 and the third receiving link 50, since the first low-noise amplifier 401 is equipped with a first filter circuit 402 in the front stage, while the third low-noise amplifier in the third receiving link 50 is not equipped with a filter circuit in the front stage, the third low-noise amplifier can be selected with a high power tolerance to prevent damage to the third low-noise amplifier.

[0116] In one possible embodiment of this application, the second receiving link 40 further includes a second switching module 403 or a fourth switching module, which is used to enable the input terminal of the first low noise amplifier 401 to be switchably connected to the first filter circuit 402, or to bypass the first filter circuit 402 and connect to the antenna module 500 to form a third receiving link 50.

[0117] Specifically, the second switching module 403 or the fourth switching module may also include a fourth terminal, which is connected to the antenna module 500 or the third terminal 7003 of the third switching module 700. In this case, when the first terminal 7001 of the third switching module 700 is connected to the third terminal 7003 of the third switching module 700, and the first terminal of the second switching module 403 is connected to the fourth terminal of the second switching module 403, the first filter circuit 402 is bypassed. In this way, the second radio frequency signal received by the antenna module 500 can bypass the first filter circuit 402 and enter the first low noise amplifier 401 for gain processing, and then enter the communication chip 300 through the first receiving port 301.

[0118] Of course, in this embodiment, a fourth switching module can also be provided in parallel with the first filter circuit 402. The fourth switching module is used to bypass or not bypass the first filter circuit 402. When the first filter circuit 402 is not bypassed, the second receiving link 40 is turned on. When the first filter circuit 402 is bypassed, a third receiving link 50 is formed between the antenna module 500 and the first receiving port 301.

[0119] Secondly, embodiments of this application also provide an electronic device, which may include: such as Figures 3-8 The radio frequency system and antenna module shown are coupled to the radio frequency system. The cellular mobile communication system in this electronic device uses TDD technology.

[0120] For example, this electronic device can also be called user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile equipment, user terminal, wireless telecom equipment, user agent, user equipment, or user device. Terminals can be stations (STAs) in wireless local area networks (WLANs), cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistant (PDA) devices, handheld devices with wireless communication capabilities, computing devices or other processing devices connected to a wireless modem, in-vehicle devices, wearable devices, and terminal devices in next-generation communication systems (e.g., fifth-generation (5G) communication networks) or future public land mobile networks (PLMNs). 5G can also be referred to as New Radio (NR).

[0121] In addition, terminal devices can also be wearable devices, which are portable devices worn directly on the body or integrated into the user's clothing or accessories. Wearable devices are not just hardware devices, but also achieve powerful functions through software support, data interaction, and cloud interaction. Broadly speaking, wearable smart devices include those that are feature-rich, large in size, and can perform complete or partial functions without relying on a smartphone, such as smartwatches or smart glasses; and those that focus on a specific application function and require the use of other devices such as smartphones, such as various smart bracelets and smart jewelry for vital sign monitoring. Examples include smartwatches, smart bracelets, and pedometers. Wireless terminals in vehicles (e.g., automobiles, bicycles, electric vehicles, airplanes, ships, trains, high-speed trains, etc.), virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, smart home devices (e.g., refrigerators, televisions, air conditioners, electricity meters, etc.), intelligent robots, workshop equipment, wireless terminals in self-driving vehicles, wireless terminals in remote medical surgery, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, or wireless terminals in smart homes, and flying equipment (e.g., intelligent robots, hot air balloons, drones, airplanes), etc. In this application, for ease of description, the chip deployed in the above-mentioned devices, such as a system-on-a-chip (SOC), baseband chip, or other chip with communication functions, may also be referred to as a terminal.

[0122] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0123] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0124] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0125] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0126] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0127] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0128] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A radio frequency system, characterized in that, include: A communication chip for transmitting and receiving first radio frequency signals in a first frequency band of a first communication system, and for transmitting and receiving second radio frequency signals in a second frequency band of a cellular mobile communication system; A transceiver module, wherein the transceiver module includes at least a first receiving link, a second receiving link, and a third receiving link; Wherein, the first receiving link is used to receive the first radio frequency signal; Both the second receiving link and the third receiving link are used to receive the second radio frequency signal; The second receiving link is a channel between the antenna module and the first receiving port of the communication chip, which passes through the first filtering circuit and the first low-noise amplifier in sequence; The third receiving link is a channel between the antenna module and the first receiving port of the communication chip that does not pass through the first filtering circuit, but passes through at least one low-noise amplifier.

2. The radio frequency system according to claim 1, characterized in that, The first receiving link includes a second low-noise amplifier and a first switching module, wherein the input of the second low-noise amplifier is connected to the antenna module. The first switching module is used to connect the output of the second low-noise amplifier to the target port; or, it is used to connect the output of the second low-noise amplifier to the second receiving port of the communication chip. The target port is either the input terminal of the first low-noise amplifier or the first receiving port. Wherein, the output terminal of the second low-noise amplifier is connected to the target port to form the third receiving link; correspondingly, the at least one low-noise amplifier includes at least the second low-noise amplifier and the first low-noise amplifier, or the at least one low-noise amplifier includes at least the second low-noise amplifier; The output of the second low-noise amplifier is connected to the second receiving port of the communication chip to form the first receiving link.

3. The radio frequency system according to claim 2, characterized in that, The first receiving link further includes a second filtering circuit connected in series between the second receiving port and the first switching module; The first switching module is specifically used to enable the output of the second low-noise amplifier to be switchably connected to the target port or the input of the second filter circuit.

4. The radio frequency system according to claim 2, characterized in that, The second receiving link further includes a second switching module, which is used to enable the input terminal of the first low noise amplifier to be switchably connected to the output terminal of the second low noise amplifier or the output terminal of the first filter circuit, and the input terminal of the first filter circuit is connected to the antenna module.

5. The radio frequency system according to any one of claims 2 to 4, characterized in that, The antenna module includes at least one antenna; the radio frequency system further includes a third switching module connected to the at least one antenna. The third switching module is used to connect the at least one antenna to the first filter circuit or to connect the at least one antenna to the input terminal of the second low-noise amplifier.

6. The radio frequency system according to any one of claims 2 to 4, characterized in that, The antenna module includes at least one first antenna and at least one second antenna; The at least one first antenna is connected to the input terminal of the second low-noise amplifier; The at least one second antenna is connected to the first filter circuit.

7. The radio frequency system according to claim 6, characterized in that, The second antenna is a cellular communication antenna operating in the cellular communication frequency band; The first antenna is a satellite communication antenna operating in the satellite communication frequency band and a cellular communication antenna operating in the cellular communication frequency band.

8. The radio frequency system according to any one of claims 1 to 4, characterized in that, The radio frequency system further includes a fourth switching module, which is used to enable the input terminal of the first low noise amplifier to be switchably connected to the first filter circuit, or to bypass the first filter circuit and connect to the antenna module to form the third receiving link.

9. The radio frequency system according to any one of claims 1 to 4, characterized in that, The radio frequency system includes a third low-noise amplifier, the output of which is connected to the first receiving port, and the input of which is connected to the antenna module to form the third receiving channel.

10. An electronic device, characterized in that, Includes the radio frequency system as described in any one of claims 1 to 9.

Images