Radio frequency front-end circuit, wireless communication system, electronic equipment and communication device
By introducing a switching module into the RF front-end circuit, the communication loss problem caused by the combiner is solved, and the communication quality is improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUAWEI TECH CO LTD
- Filing Date
- 2025-04-11
- Publication Date
- 2026-04-17
AI Technical Summary
Combiners in electronic devices increase communication losses and reduce communication quality.
The design employs an RF front-end circuit that includes a first RF path, a second RF path, and a switching module. The switching module selectively connects one of the first RF path, the second RF path, and the combiner to the antenna, thereby preventing the signal from being transmitted through the combiner.
This reduces the possibility of signal strength being weakened and improves communication quality.
Smart Images
Figure CN224139005U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of communication technology, specifically to a radio frequency front-end circuit, a wireless communication system, an electronic device, and a communication apparatus. Background Technology
[0002] With technological advancements, mobile phones, tablets, and other electronic devices with communication capabilities are becoming increasingly widespread and powerful. These devices typically include antennas to enable communication. In related technologies, antennas in electronic devices can achieve carrier aggregation across multiple frequency bands to accommodate the miniaturization of electronic devices. For example, an electronic device may contain an MHB (Middle-High Band) module and a UHB (Ultra-High Band) module, which are electrically connected to an antenna via a combiner for communication. However, the combiner increases communication loss and reduces communication quality. Utility Model Content
[0003] In view of this, this application provides a radio frequency front-end circuit, a wireless communication system, an electronic device, and a communication apparatus to help solve the problem of increased communication loss and reduced communication quality caused by combiners in the prior art.
[0004] In a first aspect, embodiments of this application provide a radio frequency (RF) front-end circuit, including: a first RF path, a second RF path, a switching module, and a combiner; the first RF path is electrically connected to a first terminal of the switching module, and the first RF path is electrically connected to a first terminal of the combiner; the second RF path is electrically connected to a second terminal of the switching module, and the second RF path is electrically connected to a second terminal of the combiner; the operating frequency bands of the first RF path and the second RF path are different; the third terminal of the combiner is electrically connected to a third terminal of the switching module; the fourth terminal of the switching module is used for connecting an external antenna; the switching module is configured to selectively connect one of the first RF path, the second RF path, and the combiner to the antenna; wherein, in a first state, the switching module is configured to connect the channel between the first RF path and the antenna, and the channels between the second RF path and the combiner and the antenna are not connected; in a second state, the switching module is configured to connect the channel between the second RF path and the antenna, and the channels between the first RF path and the combiner and the antenna are not connected; in a third state, the switching module is configured to connect the channel between the combiner and the antenna, and the channels between the first RF path and the second RF path and the antenna are not connected.
[0005] In this embodiment, the channel between the antenna and one of the first RF path, the second RF path, and the combiner is adaptively selected for operation. Specifically, in the first state, only the channel between the first RF path and the antenna can be activated. In this case, the electrical signal of the first RF path can be directly transmitted to the antenna through the switching module, or the antenna can directly transmit the received electrical signal of the first RF path's operating frequency band to the first RF path through the switching module, without needing the combiner. In the second state, only the channel between the second RF path and the antenna can be activated. In this case, the electrical signal of the second RF path can be directly transmitted to the antenna through the switching module, or the antenna can directly transmit the received electrical signal of the second RF path's operating frequency band to the second RF path through the switching module, without needing the combiner. This avoids signal loss caused by the combiner, thereby reducing the possibility of signal strength attenuation and improving communication quality.
[0006] In one possible implementation of the first aspect, the switching module includes a radio frequency switch in the first radio frequency path; the electrical connection between the first radio frequency path and the first terminal of the combiner includes: the first radio frequency path being electrically connected to the fifth terminal of the switching module, and the sixth terminal of the switching module being electrically connected to the first terminal of the combiner; in the first state and the second state, the switching module is further configured to not conduct the channel between the first radio frequency path and the combiner; in the third state, the switching module is further configured to conduct the channel between the first radio frequency path and the combiner.
[0007] In other words, to reduce the area occupied by the RF front-end circuit, the RF switch in the first RF path can be multiplexed as a switching module. In this way, the RF switch in the first RF path can selectively connect one of the first RF path, the second RF path, and the combiner to the antenna.
[0008] In one possible implementation of the first aspect, the switching module includes a radio frequency switch in the second radio frequency path; the electrical connection between the second radio frequency path and the second terminal of the combiner includes: the second radio frequency path being electrically connected to the fifth terminal of the switching module, and the sixth terminal of the switching module being electrically connected to the second terminal of the combiner; in the first and second states, the switching module is further configured to not conduct the channel between the second radio frequency path and the combiner; in the third state, the switching module is further configured to conduct the channel between the second radio frequency path and the combiner.
[0009] In other words, to reduce the area occupied by the RF front-end circuit, the RF switch in the second RF path can be multiplexed as a switching module. In this way, the RF switch in the second RF path can selectively connect one of the first RF path, the second RF path, and the combiner to the antenna.
[0010] In one possible implementation of the first aspect, in order to reduce the substrate area of the RF front-end circuit, the first RF path and the second RF path are integrated into a single chip.
[0011] In one possible implementation of the first aspect, it further includes: a second radio frequency receiving path; the second radio frequency receiving path being electrically connected to the seventh terminal of the switching module; the switching module being further configured to, in a fourth state, conduct the channel between the antenna and the second radio frequency receiving path; and the channel between the first radio frequency path, the second radio frequency path, and the combiner and the antenna being de-conducted.
[0012] In other words, in the fourth state, when the antenna receives signals from the second RF path's operating frequency band, the switching module can connect its seventh and fourth terminals to establish a connection between the antenna and the second RF receiving path. This allows the antenna to transmit the received signals from the second RF path's operating frequency band to the second RF receiving path, which then receives the target frequency band signal and transmits it to the processor. Simultaneously, the switching module disconnects the electrical connections between its first, second, and third terminals. This ensures that the connections between the first and second RF paths, the combiner, and the antenna are not open, reducing the possibility of signal strength degradation in the second RF path's operating frequency band.
[0013] In one possible implementation of the first aspect, in order to reduce the substrate area of the RF front-end circuit, the second RF receiving path is integrated with the first RF path in a single chip.
[0014] In one possible implementation of the first aspect, in order to meet user needs and the requirements for miniaturization of electronic devices, the operating frequency band of the first radio frequency path includes the mid-high frequency (MHB) band; the operating frequency band of the second radio frequency path includes the ultra-high frequency (UHB) band.
[0015] Secondly, embodiments of this application provide a wireless communication system, including: the radio frequency front-end circuit and antenna described in any of the first aspects above.
[0016] In one possible implementation of the second aspect, the antenna transmits both MHB band signals and UHB band signals.
[0017] Thirdly, embodiments of this application provide an electronic device including the radio frequency front-end circuit described in any of the first aspects above or the wireless communication system described in any of the second aspects above.
[0018] Fourthly, embodiments of this application provide a communication device, including the radio frequency front-end circuit and radio frequency transceiver described in any of the first aspects above; or including the wireless communication system and radio frequency transceiver described in any of the second aspects above.
[0019] Thirdly, embodiments of this application provide an electronic device, including a memory for storing computer program instructions and a processor for executing the program instructions, wherein when the computer program instructions are executed by the processor, the electronic device is triggered to execute the method described in any of the first aspects above.
[0020] It should be understood that the technical features of the technical solutions provided in the second, third, and fourth aspects mentioned above can all be corresponded to the technical solutions provided in the first aspect and its possible designs, so the beneficial effects that can be achieved are similar, and will not be repeated here. Attached Figure Description
[0021] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0022] Figure 1 This is a schematic diagram of the structure of a 5G terminal provided in an embodiment of this application;
[0023] Figure 2 This is a schematic diagram of the structure of a radio frequency front-end circuit provided in an embodiment of this application;
[0024] Figure 3 This is a schematic diagram of another radio frequency front-end circuit provided in an embodiment of this application;
[0025] Figure 4a This is a schematic diagram of another radio frequency front-end circuit provided in an embodiment of this application;
[0026] Figure 4b This is a schematic diagram of another radio frequency front-end circuit provided in an embodiment of this application;
[0027] Figure 4c This is a schematic diagram of another radio frequency front-end circuit provided in an embodiment of this application;
[0028] Figure 4d This is a schematic diagram of another radio frequency front-end circuit provided in an embodiment of this application;
[0029] Figure 5a This is a schematic diagram of another radio frequency front-end circuit provided in an embodiment of this application;
[0030] Figure 5b This is a schematic diagram of another radio frequency front-end circuit provided in an embodiment of this application;
[0031] Figure 5cThis is a schematic diagram of another radio frequency front-end circuit provided in an embodiment of this application;
[0032] Figure 6 This application provides a schematic diagram of the structure of a wireless communication system according to an embodiment of the present application.
[0033] Figure 7 This is a schematic diagram of the structure of a communication device provided in an embodiment of this application. Detailed Implementation
[0034] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.
[0035] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.
[0036] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.
[0037] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.
[0038] Electronic devices can include one or more antenna units, each coupled to a corresponding radio frequency (RF) module to transmit and receive signals. For example, during reception, the electronic device can convert electromagnetic waves in space into current signals with different characteristics using the antenna. The RF module then analyzes these current signals, allowing the electronic device to acquire the information carried by the electromagnetic waves. During transmission, the electronic device can also feed an electrical signal carrying the desired information into the antenna via the RF module. The antenna can then convert this electrical signal into electromagnetic waves of the corresponding frequency and transmit them. Other devices can then receive these electromagnetic waves through their respective antennas, thereby achieving wireless information transmission.
[0039] The radio frequency (RF) front-end is a core component of wireless communication equipment, serving as the fundamental unit for converting radio electromagnetic wave signals and binary digital signals. Typically, in communication systems, the RF front-end refers to the section between the antenna and the processor. For example, in 5G terminals... Figure 1 A schematic diagram of a 5G terminal is shown. The 5G terminal includes a processor, a radio frequency front end (RFFE) circuit, and an antenna. The processor may include a baseband processing section and a radio frequency processing section. The baseband processing section typically includes a modem, and the radio frequency processing section includes a radio frequency transceiver. The radio frequency transceiver can be a radio frequency integrated circuit (RFIC). The RFFE circuit can be coupled to the antenna to transmit signals to or receive signals from the antenna. The RFFE circuit determines important performance indicators such as the communication modes the mobile terminal can support, received signal strength, call stability, and transmit power, directly affecting the user experience.
[0040] Based on function, the radio frequency front end can be divided into the transmitter (Tx) and the receiver (Rx). Based on constituent components, such as... Figure 2 The diagram shows a partial circuit diagram of an RF front-end circuit. The RF front-end circuit may include multiple RF paths, with different signal frequency bands in each path. Each RF path may include a transmit / receive port, a power amplifier (PA) / low noise amplifier (LNA), filters, RF switches (SW), and duplexers. Specifically, for the receiver, the RF path typically includes a low noise amplifier and filters. For the transmitter, the RF path typically includes a power amplifier and filters.
[0041] The functions of each component can be specifically described as follows.
[0042] Power amplifier, used to amplify radio frequency signals in the transmit channel.
[0043] A filter is used to filter transmitted and received signals, that is, to retain signals in a specific frequency band and filter out signals in other frequency bands.
[0044] Low-noise amplifiers are used to amplify small signals in the receiving channel.
[0045] Radio frequency (RF) switches are used in external connectors to control the transmission of signals in the RF path.
[0046] A duplexer is used for quasi-duplex switching and for filtering radio frequency signals in the receive and transmit channels.
[0047] With the widespread application of multiple-input multiple-output (MIMO) and carrier aggregation technologies, and the development of 5G technology, the types of communication frequency bands are increasing. To meet the demands of miniaturization in electronic devices, at least two RF paths in the RF front-end circuit can be electrically connected to a single antenna via a combiner for transmitting and receiving signals across multiple frequency bands. For example, in the RF front-end circuit, two RF paths (such as...) can be combined into one antenna. Figure 2 Radio frequency (RF) paths 1 and 2 are electrically connected to an antenna via a combiner. This antenna can cover the frequency bands of both RF paths 1 and 2, enabling signal transmission and reception. For example, when RF path 1 transmits a signal in frequency band 1, the signal in frequency band 1 can be transmitted to the antenna via the combiner. The antenna can convert the received electrical signal into electromagnetic waves that propagate in space, thus transmitting the electrical signal in frequency band 1. Alternatively, the antenna can receive the electromagnetic waves corresponding to frequency band 1 and convert them into electrical signals with corresponding characteristics (such as corresponding amplitude and phase). This electrical signal can be transmitted to RF path 1 via the combiner, where RF path 1 can analyze the received electrical signal to obtain the information loaded in it, completing signal reception. Similarly, RF path 2 can also transmit signals in its operating frequency band via the antenna through the combiner, or receive signals in its operating frequency band via the antenna and then transmit them to RF path 2 via the combiner.
[0048] In the above scheme, since the two radio frequency paths need to be electrically connected to the antenna through a combiner, when the electronic device operates in a single-band scenario, this radio frequency path needs to be connected to the antenna through a combiner to transmit or receive electrical signals. However, there is a certain loss when the electrical signal is transmitted through the combiner, which leads to a reduction in signal strength on the electronic device side and a decrease in communication quality.
[0049] To address the aforementioned problems, this application provides a radio frequency (RF) front-end circuit, including a first RF path, a second RF path, a switching module, and a combiner. The first RF path is electrically connected to a first terminal of the switching module and to a first terminal of the combiner. The second RF path is electrically connected to a second terminal of the switching module and to a second terminal of the combiner. A third terminal of the combiner is electrically connected to a third terminal of the switching module. A fourth terminal of the switching module is used to connect an external antenna. The switching module is configured to selectively connect one of the first RF path, the second RF path, and the combiner to the antenna. Specifically, in a first state, the switching module is configured to connect the first RF path to the antenna, while the second RF path and the combiner are not connected to the antenna. In a second state, the switching module is configured to connect the second RF path to the antenna, while the first RF path and the combiner are not connected to the antenna. In a third state, the switching module is configured to connect the combiner to the antenna, while the first and second RF paths are not connected to the antenna. In this embodiment, the antenna is adaptively connected via one of the first RF path, the second RF path, and the combiner. Specifically, in the first state, only the channel between the first RF path and the antenna can be connected. In this case, the electrical signal of the first RF path can be directly transmitted to the antenna via the switching module, or the antenna can directly transmit the received electrical signal of the first RF path's operating frequency band to the first RF path via the switching module, without needing the combiner. In the second state, only the channel between the second RF path and the antenna can be connected. In this case, the electrical signal of the second RF path can be directly transmitted to the antenna via the switching module, or the antenna can directly transmit the received electrical signal of the second RF path's operating frequency band to the second RF path via the switching module, without needing the combiner. This avoids signal loss caused by the combiner, thereby reducing the possibility of signal strength attenuation and improving communication quality. A detailed explanation follows.
[0050] It should be noted that the solutions provided in this application embodiment can be applied to electronic devices. The electronic devices involved in this application embodiment include mobile phones, tablets, wearable devices, in-vehicle devices, augmented reality (AR) / virtual reality (VR) devices, laptops, ultra-mobile personal computers (UMPCs), netbooks, personal digital assistants (PDAs), and other mobile terminals. This application embodiment does not impose any restrictions on the specific type of electronic device.
[0051] In some possible implementations, the electronic device may also be referred to as a terminal device, user equipment (UE), etc., and the embodiments of this application do not limit this.
[0052] The solutions provided in the embodiments of this application will be described in detail below with reference to the accompanying drawings.
[0053] See Figure 3 This is a schematic diagram of a radio frequency front-end circuit provided in an embodiment of this application. Figure 3 As shown, the radio frequency front-end circuit includes: a first radio frequency path 31, a second radio frequency path 32, a switching module 33, and a combiner 34.
[0054] The first radio frequency path 31 is electrically connected to the first terminal of the switching module 33, and the first radio frequency path 31 is electrically connected to the first terminal of the combiner 34.
[0055] The second RF path 32 is electrically connected to the second terminal of the switching module 33, and the first RF path 31 is electrically connected to the second terminal of the combiner 34. The operating frequency band of the first RF path 31 is different from that of the second RF path 32.
[0056] The third terminal of the combiner 34 is electrically connected to the third terminal of the switching module 33.
[0057] The fourth terminal of the switching module 33 is used for connecting an external antenna. The switching module 33 is configured to selectively connect one of the first RF path 31, the second RF path 32, and the combiner 34 to the antenna.
[0058] In the first state, the switching module 33 is configured to open the channel between the first RF path 31 and the antenna, while the channel between the second RF path 32 and the combiner 34 and the antenna is not open.
[0059] In the second state, the switching module 33 is configured to open the channel between the second RF path 32 and the antenna, while the channel between the first RF path 31 and the combiner 34 and the antenna is not open.
[0060] In the third state, the switching module 33 is configured to open the channel between the combiner 34 and the antenna, while the channels between the first RF path 31 and the second RF path 32 and the antenna are not open.
[0061] In this embodiment, the radio frequency front-end circuit includes a first radio frequency path 31, a second radio frequency path 32, a switching module 33, and a combiner 34.
[0062] The first RF path 31 is electrically connected to the first terminal of the switching module 33 and the first terminal of the combiner 34. The second RF path 32 is electrically connected to the second terminal of the switching module 33 and the second terminal of the combiner 34. The third terminal of the combiner 34 is electrically connected to the third terminal of the switching module 33, and the fourth terminal of the switching module 33 is used for connecting an external antenna. Thus, the first RF path 31, the second RF path 32, and the combiner 34 can all be electrically connected to the antenna via the switching module 33. Since the operating frequency bands of the first RF path 31 and the second RF path 32 are different, different transmission channels can be selected based on the current signal frequency band to be transmitted by the RF front-end circuit. That is, the switching module 33 can selectively connect one of the first RF path 31, the second RF path 32, and the combiner 34 to the antenna. In the first state, the switching module 33 can connect the channel between the first RF path 31 and the antenna, while the channels between the second RF path 32 and the combiner 34 and the antenna are not connected. In other words, in the first state, the first and fourth terminals of the switching module 33 can be turned on, enabling the channel between the first RF path 31 and the antenna to be open. Conversely, the second, third, and fourth terminals of the switching module 33 can be disconnected, preventing the channel between the second RF path 32, the combiner 34, and the antenna from being open. Thus, in the first state, only the RF signal of the first RF path 31's operating frequency band can be transmitted. The first RF path 31 can transmit the RF signal to the antenna via the switching module 33, and the antenna can then transmit the RF signal. Alternatively, when the antenna receives a signal from the first RF path 31's operating frequency band, it can transmit the signal to the first RF path 31 via the switching module 33, achieving both transmission and reception of the first RF path 31's operating frequency band signal.
[0063] In the second state, the switching module 33 can connect the second RF path 32 to the antenna, while deactivating the connections between the first RF path 31, the combiner 34, and the antenna. Specifically, in the second state, the second and fourth terminals of the switching module 33 can be connected, enabling the connection between the second RF path 32 and the antenna. Conversely, the first, third, and fourth terminals of the switching module 33 can be disconnected, deactivating the connections between the first RF path 31, the combiner 34, and the antenna. Thus, in the second state, only the RF signal operating in the second RF path 32's frequency band can be transmitted. The second RF path 32 can transmit the RF signal to the antenna via the switching module 33, and the antenna can then transmit the RF signal. Alternatively, when the antenna receives a signal operating in the second RF path 32's frequency band, it can transmit the signal to the second RF path 32 via the switching module 33, enabling both transmission and reception of the second RF path 32's operating frequency band signal.
[0064] In the third state, the switching module 33 can connect the combiner 34 to the antenna, while deactivating the channels between the first RF path 31 and the second RF path 32 and the antenna. Specifically, in the third state, the third and fourth terminals of the switching module 33 can be connected, enabling the channel between the combiner 34 and the antenna. Conversely, the first, second, and fourth terminals of the switching module 33 can be disconnected, deactivating the channels between the first RF path 31 and the second RF path 32 and the antenna. Since the first RF path 31 is electrically connected to the first terminal of the combiner 34, and the second RF path 32 is electrically connected to the second terminal of the combiner 34, signals from the operating frequency bands of the first and second RF paths 31 and 32 can be transmitted to the combiner 34. In the third state, the combiner 34 can transmit the received RF signals to the antenna via the switching module 33, and the antenna will then transmit the RF signals. Alternatively, the antenna can transmit the received radio frequency signal to the combiner 34 via the switching module 33, and the combiner 34 can transmit the received radio frequency signal to the first radio frequency path 31 and the second radio frequency path 32, thereby realizing the transmission and reception of signals in the operating frequency band of the first radio frequency path 31 and the operating frequency band of the second radio frequency path 32.
[0065] In other words, in this embodiment, the switching module 33 can selectively connect one of the first RF path 31, the second RF path 32, and the combiner 34 to the antenna according to different operating scenarios. For example, in a scenario where only the signal of the first RF path 31 is transmitted and / or received, since only the signal of the first RF path 31 needs to be transmitted, the switching module 33 can connect the channel between the first RF path 31 and the antenna, but not connect the channels between the second RF path 32 and the combiner 34 and the antenna, so that the signal of the first RF path 31 can be transmitted in the channel between the first RF path 31 and the antenna. In a scenario where only the signal of the second RF path 32 is transmitted and / or received, since only the signal of the second RF path 32 needs to be transmitted, the switching module 33 can connect the channel between the second RF path 32 and the antenna, but not connect the channels between the first RF path 31 and the combiner 34 and the antenna, so that the signal of the second RF path 32 can be transmitted in the channel between the second RF path 32 and the antenna. In scenarios where signals from the first RF path 31 and the second RF path 32 are simultaneously transmitted and / or received, since both signals need to be transmitted simultaneously, they can be combined using a combiner 34 before being transmitted to the antenna. At this time, the switching module 33 can open the channel between the combiner 34 and the antenna, but not the channels between the second RF path 32 and the first RF path 31 and the antenna, allowing signals from both the first RF path 31 and the second RF path 32 to be transmitted within the channel between the combiner 34 and the antenna.
[0066] Thus, in this embodiment of the application, when operating in a single-band signal scenario, only the channel between the corresponding RF path and the antenna can be turned on, without needing to go through the channel between the combiner 34 and the antenna. This avoids signal loss caused by the combiner 34, thereby reducing the possibility of signal strength being weakened and improving communication quality.
[0067] As one possible implementation, the switching module 34 includes an RF switch in the first RF path 31, such as... Figure 4a As shown, the electrical connection between the first radio frequency path 31 and the first terminal of the combiner 34 includes:
[0068] The first radio frequency path 31 is electrically connected to the fifth terminal of the switching module 33, and the sixth terminal of the switching module 33 is electrically connected to the first terminal of the combiner 34.
[0069] In both the first and second states, the switching module 33 is also configured to not conduct the channel between the first RF path 31 and the combiner 34.
[0070] In the third state, the switching module 33 is also configured to open the channel between the first RF path 31 and the combiner 34.
[0071] In other words, in order to reduce the area occupied by the RF front-end circuit, the RF switch in the first RF path 31 can be multiplexed as a switching module 33. In this way, the RF switch in the first RF path 31 can selectively connect one of the first RF path 31, the second RF path 32, and the combiner 34 to the antenna.
[0072] Specifically, the first terminal of the RF switch in the first RF path 31 is electrically connected to the transceiver port of the first RF path 31; the second RF path 32 is electrically connected to the second terminal of the RF switch in the first RF path 31; the third terminal of the combiner 34 is electrically connected to the third terminal of the RF switch in the first RF path 31; and the fourth terminal of the RF switch in the first RF path 31 is electrically connected to the antenna. In this way, by controlling the RF switch in the first RF path 31, one of the first RF path 31, the second RF path 32, and the combiner 34 can be selectively connected to the antenna.
[0073] Since the RF switch in the first RF path 31 also controls the opening and closing of the channel between the first RF path 31 and the combiner 34, the first terminal of the first RF path 31 is electrically connected to the first terminal of the combiner 34 through the RF switch. Specifically, the transmit / receive port of the first RF path 31 is electrically connected to the fifth terminal of the RF switch in the first RF path 31, and the sixth terminal of the RF switch in the first RF path 31 is electrically connected to the first terminal of the combiner 34. Thus, in the first state, since only signals in the operating frequency band of the first RF path 31 need to be transmitted, transmission can be achieved by opening the channel between the first RF path 31 and the antenna. Therefore, the channel between the first RF path 31 and the combiner 34 needs to be disconnected to prevent the first RF path 31 from transmitting signals in its operating frequency band to the combiner 34, which would reduce signal strength. Therefore, in the first state, the RF switch in the first RF path 31 disconnects the channel between the first RF path 31 and the combiner 34.
[0074] Similarly, in the second state, since only the signal of the second RF path 32's operating frequency band needs to be transmitted, transmission can be achieved by opening the channel between the second RF path 32 and the antenna. Therefore, the channel between the first RF path 31 and the combiner 34 needs to be disconnected to prevent the first RF path 31 from transmitting its operating frequency band signal to the combiner 34, causing signal interference and reducing signal quality. Therefore, in the second state, the RF switch in the first RF path 31 disconnects the channel between the first RF path 31 and the combiner 34.
[0075] In the third state, since both the operating frequency bands of the first RF path 31 and the second RF path 32 can be transmitted simultaneously through a single antenna, a combiner 34 is needed to transmit both signals to the antenna. At this time, the RF switch in the first RF path 31 can open the path between the combiner 34 and the antenna. Furthermore, the RF switch in the first RF path 31 also needs to open the path between the first RF path 31 and the combiner 34 to transmit the signals from the first RF path 31 to the combiner 34, which then transmits the signals from the first RF path 31 to the antenna.
[0076] It should be understood that the second RF path 32 also includes an RF switch, which controls whether the channel between the second RF path 32 and the combiner 34 is open. In the third state, the RF switch in the second RF path 32 opens the channel between the second RF path 32 and the combiner 34, so that the signal of the second RF path 32 operating frequency band is transmitted to the combiner 34. The combiner 34 combines the signal of the second RF path 32 operating frequency band and the signal of the first RF path 31 operating frequency band and transmits them to the antenna. Alternatively, when the combiner 34 receives a mixed signal of the second RF path 32 operating frequency band and the first RF path 31 operating frequency band transmitted from the antenna, it can distinguish the signal of the second RF path 32 operating frequency band and the signal of the first RF path 31 operating frequency band and transmit them to the first RF path 31 and the second RF path 32 respectively.
[0077] In some embodiments, to reduce circuit complexity, the first terminal of the switching module 33 can be multiplexed as the fifth terminal, that is, the first terminal and the fifth terminal of the switching module 33 are a single port, such as... Figure 4a As shown. At this time, the first RF path 31 is electrically connected to the first terminal of the switching module 33, and the sixth terminal of the switching module 33 is electrically connected to the first terminal of the combiner 34. In this way, the switching module 33 can control whether the channel between the first RF path 31 and the combiner 34 is opened by controlling whether the first terminal is electrically connected to the sixth terminal.
[0078] Of course, in other embodiments, the first and fifth terminals of the switching module 33 may also be different ports, see reference. Figure 4b As shown, the embodiments of this application do not impose limitations on this. For ease of description, the following figures illustrate a schematic diagram with the first and fifth ends of the switching module 33 as a single port.
[0079] As another possible implementation, the switching module 34 includes an RF switch in the second RF path 32, such as Figure 4cAs shown, the electrical connection between the second RF path 32 and the second terminal of the combiner 34 includes:
[0080] The second RF path 32 is electrically connected to the fifth terminal of the switching module 33, and the sixth terminal of the switching module 33 is electrically connected to the second terminal of the combiner 34.
[0081] In both the first and second states, the switching module 33 is also configured to not conduct the channel between the second RF path 32 and the combiner 34.
[0082] In the third state, the switching module 33 is also configured to open the channel between the second RF path 32 and the combiner 34.
[0083] In other words, in order to reduce the area occupied by the RF front-end circuit, the RF switch in the second RF path 32 can be multiplexed as a switching module 33. In this way, the RF switch in the second RF path 32 can selectively connect one of the first RF path 31, the second RF path 32, and the combiner 34 to the antenna.
[0084] Specifically, the first terminal of the RF switch in the second RF path 32 is electrically connected to the first RF path 31, the transceiver port of the second RF path 32 is electrically connected to the second terminal of the RF switch in the second RF path 32, the third terminal of the combiner 34 is electrically connected to the third terminal of the RF switch in the second RF path 32, and the fourth terminal of the RF switch in the second RF path 32 is electrically connected to the antenna. In this way, by controlling the RF switch in the second RF path 32, one of the first RF path 31, the second RF path 32, and the combiner 34 can be selectively connected to the antenna.
[0085] Since the RF switch in the second RF path 32 also controls the opening and closing of the channel between the second RF path 32 and the combiner 34, the electrical connection between the second RF path 32 and the second terminal of the combiner 34 means that the second RF path 32 can be electrically connected to the second terminal of the combiner 34 through the RF switch. Specifically, the transmit / receive port of the second RF path 32 is electrically connected to the fifth terminal of the RF switch in the second RF path 32, and the sixth terminal of the RF switch in the second RF path 32 is electrically connected to the second terminal of the combiner 34. Thus, in the first state, since only the signal of the operating frequency band of the first RF path 31 needs to be transmitted, transmission can be achieved by opening the channel between the first RF path 31 and the antenna. Therefore, the channel between the second RF path 32 and the combiner 34 needs to be disconnected to prevent the second RF path 32 from transmitting its operating frequency band signal to the combiner 34, causing signal interference and reducing signal quality. Therefore, in the first state, the RF switch in the second RF path 32 disconnects the channel between the second RF path 32 and the combiner 34.
[0086] Similarly, in the second state, since only signals in the operating frequency band of the second RF path 32 need to be transmitted, transmission can be achieved by opening the channel between the second RF path 32 and the antenna. Therefore, the channel between the second RF path 32 and the combiner 34 needs to be disconnected to prevent the second RF path 32 from transmitting signals in its operating frequency band to the combiner 34, causing signal interference and reducing signal quality. Therefore, in the second state, the RF switch in the second RF path 32 disconnects the channel between the second RF path 32 and the combiner 34.
[0087] In the third state, since both the operating frequency bands of the first RF path 31 and the second RF path 32 can be transmitted simultaneously through a single antenna, a combiner 34 is needed to combine the signals from the first RF path 31 and the second RF path 32 before transmitting them to the antenna. At this time, the RF switch in the second RF path 32 can open the path between the combiner 34 and the antenna. Furthermore, the RF switch in the second RF path 32 also needs to open the path between the second RF path 32 and the combiner 34 to transmit the signals from the second RF path 32 to the combiner 34, which then transmits the signals from the second RF path 32 to the antenna.
[0088] It should be understood that the first RF path 31 also includes an RF switch, which controls whether the channel between the first RF path 31 and the combiner 34 is open. In the third state, the RF switch in the first RF path 31 opens the channel between the first RF path 31 and the combiner 34, so that the signal of the operating frequency band of the first RF path 31 is transmitted to the combiner 34. The combiner 34 combines the signal of the operating frequency band of the second RF path 32 and the signal of the operating frequency band of the first RF path 31 and transmits them to the antenna. Alternatively, when the combiner 34 receives a mixed signal of the operating frequency band of the second RF path 32 and the signal of the operating frequency band of the first RF path 31 transmitted from the antenna, it can distinguish the signal of the operating frequency band of the second RF path 32 and the signal of the operating frequency band of the first RF path 31 and transmit them to the first RF path 31 and the second RF path 32 respectively.
[0089] In some embodiments, to reduce circuit complexity, the first terminal of the switching module 33 can be multiplexed as the fifth terminal, that is, the first terminal and the fifth terminal of the switching module 33 are a single port, such as... Figure 4c As shown. At this time, the second RF path 32 is electrically connected to the first terminal of the switching module 33, and the sixth terminal of the switching module 33 is electrically connected to the first terminal of the combiner 34. In this way, the switching module 33 can control whether the channel between the second RF path 32 and the combiner 34 is opened by controlling whether the first terminal is electrically connected to the sixth terminal.
[0090] Of course, in other embodiments, the first and fifth terminals of the switching module 33 may be different ports, and this application does not limit this. For ease of description, the following figures illustrate the case where the first and fifth terminals of the switching module 33 are a single port.
[0091] As one possible implementation, in order to meet user needs and the requirements for miniaturization of electronic devices, the operating frequency band of the first radio frequency path 31 includes the MHB (Middle-High Band) band; the operating frequency band of the second radio frequency path 32 includes the UHB (Ultra-High Band) band.
[0092] As one possible implementation, to reduce the substrate area of the RF front-end circuit, the first RF path 31 and the second RF path 32 are integrated into a single RF chip, such as... Figure 4d As shown.
[0093] As one possible implementation, such as Figure 5a and Figure 5b As shown, the above-mentioned radio frequency front-end circuit also includes: a second radio frequency receiving path 35.
[0094] The second radio frequency receiving path 35 is electrically connected to the seventh terminal of the switching module 33.
[0095] The switching module 33 is also configured to, in the fourth state, conduct the channel between the antenna and the second RF receiving path 35, while the channels between the first RF path 31, the second RF path 32, the combiner 34, and the antenna are not conducted.
[0096] In this embodiment, to reduce power consumption loss and improve signal strength when receiving signals from the second RF path 32 operating frequency band, the RF front-end circuit further includes a second RF receiving path 35. The second RF receiving path 35 is used to receive signals at the frequency corresponding to the second RF path 32 transmitted by the antenna. The second RF receiving path 35 is electrically connected to the seventh terminal of the switching module 33. Thus, in the fourth state, i.e., when the antenna receives signals from the second RF path 32 operating frequency band, the switching module 33 can connect its seventh terminal to its fourth terminal to establish a channel between the antenna and the second RF receiving path 35. This allows the antenna to transmit the received signals from the second RF path 32 operating frequency band to the second RF receiving path 35, which then receives the target frequency band signal and transmits it to the processor. Furthermore, the switching module 33 disconnects the electrical connection between the first and fourth terminals, disconnects the electrical connection between the second and fourth terminals, and disconnects the electrical connection between the third and fourth terminals. This ensures that the channels between the first RF path 31, the second RF path 32, the combiner 34, and the antenna are not connected, thereby reducing the possibility of signal strength reduction in the operating frequency band of the second RF path 32.
[0097] In some embodiments, the second radio frequency receiving path 35 includes devices such as a low-noise amplifier and a filter to amplify and filter the received target frequency band signal.
[0098] in Figure 5b The diagram shows the switching module 33 multiplexing the RF switch in the first RF path 31. Of course, the switching module 33 can also multiplex the RF switch in the second RF path; see reference [reference needed]. Figure 5b As shown, it will not be elaborated further here.
[0099] As one possible implementation, to reduce the substrate area of the RF front-end circuit, the second RF receiving path 35 and the first RF path 31 are integrated into a single RF chip, such as... Figure 5c As shown. In Figure 5c In this example, the switching module 33 is illustrated as being independent of the RF switch in the first RF path 31 and the RF switch in the second RF path.
[0100] In this embodiment, different signal transmission channels can be activated according to different operating scenarios of different RF front-ends to improve signal strength, reduce signal loss, and ensure signal quality. For ease of explanation, the following description uses the operating frequency band of the first RF path 31 as the MHB band, the operating frequency band of the second RF path 32 as the UHB band, and the switching module 33 multiplexing the RF switch in the first RF path 31 (hereinafter referred to as the first RF switch) as an example. The RF signal transmitted by the first RF path 31 can be called the MHB signal, and the RF signal transmitted by the second RF path 32 can be called the UHB signal. The RF switch in the second RF path 32 can be simply referred to as the second RF switch.
[0101] When the RF front-end circuit operates in the MHB scenario, i.e., when the RF front-end circuit only transmits MHB signals, the first and fourth terminals of the first RF switch can be turned on, while the second, third, and fifth terminals of the first RF switch are disconnected from the fourth terminal. This connects the first RF path 31 to the antenna, while deactivating the connections between the second RF path 32, the combiner 34, and the second RF receiving path 35 to the antenna. Furthermore, the fifth and sixth terminals of the first RF switch are disconnected, thus breaking the connection between the first RF path 31 and the combiner 34, preventing the MHB signal from being transmitted to the combiner 34. Additionally, the connection between the second RF path 32 and the combiner 34 is also disconnected. For example, the second RF switch in the second RF path 32 can disconnect the connection between the second RF path 32 and the combiner 34 to prevent the UHB signal from being transmitted to the combiner 34.
[0102] When an MHB signal needs to be transmitted, the first RF path 31 can transmit the MHB signal to the antenna via the first RF switch, and the antenna will then transmit the MHB signal. When receiving an MHB signal, after the antenna receives the MHB signal, it can transmit the MHB signal to the first RF path 31 via the first RF switch. The first RF path 31 will then amplify, filter, and process the MHB signal before transmitting it to the corresponding processor.
[0103] When the RF front-end circuit operates in a UHB scenario, i.e., when the RF front-end circuit only transmits UHB signals, the second and fourth terminals of the first RF switch can be turned on, while the first, third, and fifth terminals of the first RF switch are disconnected from the fourth terminal. This establishes a conductive path between the second RF path 32 and the antenna, while de-establishing conductive paths between the first RF path 31, the combiner 34, and the second RF receiving path 35 and the antenna. Furthermore, the fifth and sixth terminals of the first RF switch are disconnected, thus breaking the channel between the first RF path 31 and the combiner 34, preventing the transmission of the MHB signal to the combiner 34. Additionally, the channel between the second RF path 32 and the combiner 34 is also disconnected. For example, the second RF switch in the second RF path 32 can disconnect the channel between the second RF path 32 and the combiner 34 to prevent the transmission of the UHB signal to the combiner 34.
[0104] When a UHB signal needs to be transmitted, the second RF path 32 can transmit the UHB signal to the antenna through the first RF switch, and the antenna will then transmit the UHB signal. When a UHB signal is received, after the antenna receives the UHB signal, it can transmit the UHB signal to the second RF path 32 through the first RF switch. The second RF path 32 will then amplify, filter, and process the UHB signal before transmitting it to the corresponding processor.
[0105] Alternatively, when the RF front-end circuit operates in a UHB scenario, i.e., when the RF front-end circuit only transmits UHB signals, when it is necessary to transmit a UHB signal, the second and fourth terminals of the first RF switch can be turned on, while the first, third, and fifth terminals of the first RF switch are disconnected from the fourth terminal. Thus, when it is necessary to transmit a UHB signal, the channel between the second RF path 32 and the antenna is open, while the channels between the first RF path 31, the combiner 34, and the second RF receiving path 35 and the antenna are not open. Furthermore, the fifth and sixth terminals of the first RF switch are disconnected, thus disconnecting the channel between the first RF path 31 and the combiner 34, preventing the transmission of the MHB signal to the combiner 34. Additionally, the channel between the second RF path 32 and the combiner 34 is also disconnected. For example, the second RF switch in the second RF path 32 can disconnect the channel between the second RF path 32 and the combiner 34 to prevent the transmission of the UHB signal to the combiner 34. When transmitting a UHB signal, the second radio frequency path 32 can transmit the UHB signal to the antenna through the first radio frequency switch, and the antenna will transmit the UHB signal.
[0106] After transmitting a UHB signal, when it is necessary to receive a UHB signal, the electrical connection between the second and fourth terminals of the first RF switch can be disconnected, and the fifth and fourth terminals of the first RF switch can be connected. This connects the second RF receiving path 35 to the antenna, while the paths between the first RF path 31, the second RF path 32, the combiner 34, and the antenna are disconnected. Furthermore, the fifth and sixth terminals of the first RF switch are disconnected, thus disconnecting the path between the first RF path 31 and the combiner 34, preventing the transmission of the MHB signal to the combiner 34. Additionally, the path between the second RF path 32 and the combiner 34 is also disconnected; for example, the second RF switch in the second RF path 32 can disconnect the path between the second RF path 32 and the combiner 34 to prevent the transmission of the UHB signal to the combiner 34.
[0107] After the antenna receives the UHB signal, it can be transmitted to the second RF receiving path 35 via the first RF switch. The second RF receiving path 35 amplifies and filters the UHB signal before transmitting it to the corresponding processor. This allows UHB transmission and reception to be performed through different channels, further reducing UHB signal loss and improving UHB signal quality.
[0108] When the RF front-end circuit operates in both MHB and UHB scenarios (i.e., it transmits both UHB and MHB signals), the third and fourth terminals of the first RF switch can be turned on, while the first, second, and fifth terminals of the first RF switch are disconnected from the fourth terminal. This establishes a conductive path between the combiner 33 and the antenna, while de-conducting paths between the first RF path 31, the second RF path 32, and the second RF receiving path 35 and the antenna. Furthermore, the fifth and sixth terminals of the first RF switch are turned on, thus establishing a conductive path between the first RF path 31 and the combiner 34 to transmit the MHB signal to the combiner 34. Additionally, the path between the second RF path 32 and the combiner 34 is also conductive. For example, the second RF switch in the second RF path 32 can activate the path between the second RF path 32 and the combiner 34 to transmit the UHB signal to the combiner 34.
[0109] When it is necessary to transmit UHB and / or MHB signals, the second RF path 32 can transmit the UHB signal to the combiner 34 through the second RF switch, and / or the first RF path 31 can transmit the MHB signal to the combiner 34 through the first RF switch. Thus, when the combiner 34 receives the UHB and MHB signals, it can perform combining processing on the UHB and MHB signals and transmit the combined UHB and MHB signals to the antenna, which then transmits the UHB and MHB signals. Alternatively, when the combiner 34 receives the UHB or MHB signal, it can transmit the UHB or MHB signal to the antenna through the first RF switch, and the antenna then transmits the UHB or MHB signal.
[0110] When receiving UHB and / or MHB signals, after the antenna receives the UHB and / or MHB signals, it can transmit the UHB and / or MHB signals to the combiner 34 via the first RF switch. The combiner 34 distinguishes the received RF signals, identifies the UHB and MHB signals, and then transmits the UHB signal to the second RF path 32 via the second RF switch. The second RF path 32 performs amplification, filtering, and other processing before transmitting the signal to the corresponding processor. Similarly, the MHB signal is transmitted to the first RF path 31 via the first RF switch, where it undergoes amplification, filtering, and other processing before being transmitted to the corresponding processor.
[0111] Corresponding to the above embodiments, this application also provides a wireless communication system, such as... Figure 6 As shown, the system includes a video front-end circuit 61 and an antenna. The radio frequency (RF) front-end circuit 61 is the RF front-end circuit described in the above embodiment. The antenna 62 is electrically connected to the fourth terminal of the switching module in the RF front-end circuit 61. The antenna 62 is configured to transmit and / or receive RF signals.
[0112] As one possible implementation, antenna 62 can transmit MHB band signals and UHB band signals. That is, antenna 62 is configured to transmit MHB band signals and UHB band signals; and / or to receive MHB band signals and UHB band signals.
[0113] Corresponding to the above embodiments, this application also provides an electronic device. This electronic device includes the radio frequency front-end circuit described in the above embodiments. Alternatively, it includes the wireless communication system described in the above embodiments.
[0114] In some embodiments, the electronic device may be, for example, a terminal device, which may further include one or more processors and one or more memories. The one or more memories are coupled to the one or more processors, and the one or more memories are used to store computer program code, which includes computer instructions.
[0115] Corresponding to the above embodiments, this application also provides an apparatus, which may specifically be a chip, component or module, and may include the radio frequency front-end circuit described in the above embodiments or the wireless communication system described in the above embodiments.
[0116] like Figure 7 The diagram shown is a structural schematic of a communication device 70 provided in an embodiment of this application. The communication device 70 includes a radio frequency front-end circuit 61 as described in the above embodiment and a radio frequency transceiver 110, as... Figure 7 As shown. Alternatively, the communication device 70 includes a wireless communication system as described in the above embodiments and a radio frequency transceiver 110.
[0117] The radio frequency transceiver 110 can be understood as a radio frequency transceiver semiconductor, which may consist of a logic area and an analog circuit area. The radio frequency transceiver 110 converts digital signals from the modem chip (baseband processor) into analog signals, and then converts them into radio frequencies usable by the user before transmitting them through the radio frequency front-end module and antenna. Simultaneously, the radio frequency transceiver 110 converts external signals received through the radio frequency front-end circuit 61 into digital signals and transmits them to the modem chip. The radio frequency front-end circuit 61 is the part between the baseband processor and the antenna, which converts binary signals into high-frequency radio electromagnetic wave signals during signal transmission and converts received electromagnetic wave signals into binary digital signals during signal reception. The radio frequency front-end circuit 61 typically includes devices such as a power amplifier (PA), filter, duplexer, radio frequency switch, and low-noise amplifier.
[0118] For example, when the communication device 12 is a terminal device, the terminal device may include an antenna, a radio frequency front-end circuit 61, a radio frequency transceiver 110, a baseband processor (BP), an application processor (AP), a memory, a power management module, and other peripheral circuits (such as an audio module, a display module, and a camera module). Alternatively, it may include a wireless communication system, a radio frequency transceiver 110, a baseband processor (BP), an application processor (AP), a memory, a power management module, and other peripheral circuits (such as an audio module, a display module, and a camera module).
[0119] Through the above description of the embodiments, those skilled in the art will understand that, for the sake of convenience and brevity, only the division of the above functional modules is used as an example. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.
[0120] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another device, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.
[0121] The units described as separate components may or may not be physically separate. A component shown as a unit can be one or more physical units; that is, it can be located in one place or distributed in multiple different locations. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.
[0122] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.
[0123] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solutions of the embodiments of this application, essentially or in other words, the parts that contribute to the prior art, or all or part of the technical solutions, can be embodied in the form of a software product. This software product is stored in a storage medium and includes several instructions to cause a device (which may be a microcontroller, chip, etc.) or processor to execute all or part of the steps of the methods 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.
[0124] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. A radio frequency front-end circuit, characterized by include: First RF path, second RF path, switching module and combiner; The first radio frequency path is electrically connected to the first terminal of the switching module, and the first radio frequency path is electrically connected to the first terminal of the combiner; The second radio frequency path is electrically connected to the second terminal of the switching module, and the second radio frequency path is electrically connected to the second terminal of the combiner; the operating frequency band of the first radio frequency path is different from that of the second radio frequency path; The third terminal of the combiner is electrically connected to the third terminal of the switching module; The fourth terminal of the switching module is used to connect an external antenna; the switching module is configured to selectively connect one of the first radio frequency path, the second radio frequency path, and the combiner to the antenna; wherein... In the first state, the switching module is configured to open the channel between the first radio frequency path and the antenna, while the second radio frequency path and the channel between the combiner and the antenna are not open; In the second state, the switching module is configured to open the channel between the second radio frequency path and the antenna, while the first radio frequency path and the channel between the combiner and the antenna are not open; In the third state, the switching module is configured to open the channel between the combiner and the antenna, while the channels between the first RF path and the second RF path and the antenna are not open.
2. The circuit of claim 1, wherein, The switching module includes the radio frequency switch in the first radio frequency path; The first radio frequency path is electrically connected to the first terminal of the combiner, including: The first radio frequency path is electrically connected to the fifth terminal of the switching module, and the sixth terminal of the switching module is electrically connected to the first terminal of the combiner; In both the first and second states, the switching module is further configured to not open the channel between the first radio frequency path and the combiner; In the third state, the switching module is also configured to open the channel between the first radio frequency path and the combiner.
3. The circuit of claim 1, wherein, The switching module includes the radio frequency switch in the second radio frequency path; The second radio frequency path is electrically connected to the second terminal of the combiner, including: The second radio frequency path is electrically connected to the fifth terminal of the switching module, and the sixth terminal of the switching module is electrically connected to the second terminal of the combiner; In both the first and second states, the switching module is further configured to not open the channel between the second RF path and the combiner; In the third state, the switching module is also configured to open the channel between the second RF path and the combiner.
4. The circuit according to any one of claims 1 to 3, characterized in that The first radio frequency path and the second radio frequency path are integrated into a single chip.
5. The circuit according to any one of claims 1-3, characterized in that, Also includes: Second radio frequency receiving path; The second radio frequency receiving path is electrically connected to the seventh terminal of the switching module; The switching module is further configured to, in a fourth state, connect the channel between the antenna and the second radio frequency receiving path; the first radio frequency path, the second radio frequency path, and the channel between the combiner and the antenna are not connected.
6. The circuit according to claim 5, characterized in that, The second radio frequency receiving path is integrated with the first radio frequency path in a single chip.
7. The circuit according to any one of claims 1 to 6, characterized in that The first radio frequency path operates in the mid-to-high frequency (MHB) band; the second radio frequency path operates in the ultra-high frequency (UHB) band.
8. A wireless communication system, characterized by Includes the radio frequency front-end circuit and antenna as described in any one of claims 1-7.
9. The system of claim 8, wherein, The antenna transmits MHB band signals and UHB band signals.
10. An electronic device, comprising: The electronic device includes the radio frequency front-end circuit according to any one of claims 1-7 or the wireless communication system according to claim 8 or 9.
11. A communications device, characterized by The communication device includes the radio frequency front-end circuit and radio frequency transceiver as described in any one of claims 1-7; or includes the wireless communication system and radio frequency transceiver as described in claim 8 or 9.