Radio frequency systems and communication devices

Abstract

This application relates to a radio frequency (RF) system and a communication device. The RF system includes: an antenna interface for connecting to an external antenna; a detection circuit connected to the antenna interface for generating access information after detecting that the external antenna is connected to the antenna interface; a processing circuit connected to the detection circuit for compensating the transmission parameters of the RF signal based on the access information; and an RF front-end circuit connected to both the processing circuit and the antenna interface for supporting the transmission processing of the RF signal to transmit the compensated RF signal through the external antenna. The RF system provided by this application can compensate for the transmission parameters of the RF signal transmitted through the external antenna, reducing losses caused by insertion loss of the external antenna and improving the transmission performance of the RF system.

Description

Technical Field

[0001] This application relates to the field of radio frequency technology, and in particular to radio frequency systems and communication equipment. Background Technology

[0002] To enhance wireless signal coverage, external antennas are typically attached to communication equipment to overcome signal loss during transmission. This propagation loss includes spatial loss due to signal propagation in space and penetration loss due to signal penetration through building materials. However, external antennas involve longer cables, which introduce insertion loss and negatively impact signal transmission performance. Summary of the Invention

[0003] This application provides a radio frequency system and communication device that can compensate for radio frequency signals and improve the performance of signals transmitted through an external antenna.

[0004] In a first aspect, this application provides a radio frequency (RF) system. The RF system includes:

[0005] Antenna interface, used to connect to an external antenna;

[0006] A detection circuit, connected to the antenna interface, is used to generate access information after detecting that the external antenna is connected to the antenna interface;

[0007] A processing circuit, connected to the detection circuit, is used to compensate the transmission parameters of the radio frequency signal based on the access information;

[0008] The radio frequency front-end circuit is connected to the processing circuit and the antenna interface respectively, and is used to support the transmission processing of the radio frequency signal so as to transmit the compensated radio frequency signal through the external antenna.

[0009] Secondly, this application also provides a communication device, which includes an external antenna and the radio frequency system provided in the first aspect above.

[0010] The aforementioned radio frequency system and communication equipment, wherein the radio frequency system includes an antenna interface, a detection circuit, a processing circuit, and a radio frequency front-end circuit. After the detection circuit detects that an external antenna is connected to the antenna interface, it generates access information. Then, the processing circuit compensates the transmission parameters of the radio frequency signal according to the access information. Subsequently, the compensated radio frequency signal is transmitted through the radio frequency front-end circuit and the external antenna. Compared with transmitting the radio frequency signal directly through the external antenna, this application compensates the transmission parameters of the radio frequency signal, which to a certain extent offsets the performance loss caused by the insertion loss of the external antenna, improves the transmission performance of the radio frequency system, and fills the shortcomings of the external antenna in transmission. Attached Figure Description

[0011] Figure 1This is a schematic diagram of the external structure of a customer front-end device provided in one embodiment;

[0012] Figure 2 A structural block diagram of a radio frequency system provided in one embodiment;

[0013] Figure 3 This is a structural block diagram of a communication device provided in one embodiment;

[0014] Figure 4 A structural block diagram of a radio frequency system provided for another embodiment;

[0015] Figure 5 A structural block diagram of a radio frequency system provided in yet another embodiment;

[0016] Figure 6 A structural block diagram of a radio frequency system provided in another embodiment;

[0017] Figure 7 A structural block diagram of a communication device provided in another embodiment;

[0018] Figure 8 A structural block diagram of a communication device provided in yet another embodiment.

[0019] Explanation of reference numerals in the attached figures:

[0020] 10 - Customer front-end equipment, 11 - Housing, 13 - Interface, 131 - Power interface, 133 - USB interface, 135 - Network cable interface, 14 - Button, 100 - Antenna interface, 200 - Detection circuit, 210 - Detection module, 211 - Voltage detection unit, 220 - Determination module, 230 - First isolation circuit, 240 - Second isolation circuit, 300 - Processing circuit, 310 - Processor, 320 - RF transceiver, 400 - RF front-end circuit, 410 - RF transceiver module, 420 - Switch module, 510 - External antenna, 520 - Third isolation circuit, 530 - Fourth isolation circuit. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which embodiments of this application belong. The terminology used herein in the description of embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the embodiments of this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0023] It is understood that the terms "first," "second," etc., used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, without departing from the scope of this application, a first isolation circuit may be referred to as a second isolation circuit, and similarly, a second isolation circuit may be referred to as a first isolation circuit. Both the first isolation circuit and the second isolation circuit are isolation circuits, but they are not the same isolation circuit.

[0024] The expression "configured as" as used in this application may be used interchangeably with, for example, "suitable for," "capable of," "able to," or "designed to," in hardware or software, depending on the context. In some cases, the expression "device configured as..." may imply that the device, together with other devices or components, is "capable of." For example, "processor configured to perform A, B, and C" may imply a processor for performing the corresponding operations, which is capable of performing the corresponding operations by executing one or more software programs stored in a storage device.

[0025] In the early stages of wireless communication system construction, outdoor base stations were often used to provide both indoor and outdoor coverage to achieve full wireless network coverage. This approach offers advantages such as rapid network deployment and low investment costs. However, signal coverage quality is limited by many factors. For example, the building materials and structure of the buildings requiring wireless network coverage can affect communication quality. For single-story, small-area buildings where the building materials are easily penetrated by wireless signals, outdoor base stations can provide sufficient indoor coverage. However, for large buildings, outdoor base stations typically cannot meet the requirements for deep indoor wireless network coverage.

[0026] For example, the frequency of communication and the different requirements for communication capacity will affect the indoor coverage quality of wireless networks. To facilitate understanding, let's take communication frequency as an example to briefly introduce the relationship between wireless communication parameters and the indoor coverage quality of wireless networks. Wireless signals have the propagation characteristic that the higher the frequency, the higher the propagation loss. Propagation loss can include, for example, spatial propagation loss and penetration loss through building materials.

[0027] Table 1 shows the test data on the penetration loss of wireless signals at different frequency bands through building materials. As can be seen from Table 1, at the same distance, the path loss of a wireless signal at a communication frequency of 2.6 GHz is approximately 4.5 dB higher than that at a communication frequency of 1.8 GHz. The path loss of a wireless signal at a communication frequency of 3.5 GHz is approximately 2.5 dB higher than that at a communication frequency of 2.6 GHz.

[0028] Table 1

[0029] category 1800 / 2100MHz 2600MHz 3500MHz Brick wall penetration loss (dB) 10-15 11-18 12-20 Penetration loss through concrete wall (dB) 0-30 22-32 25-35 Penetration loss (dB) of gypsum board wall 8-12 9-14 10-15 Penetration loss (dB) of ordinary glass wall 2-5 4-6 5-8 Penetration loss (dB) of thin wooden doors 3-5 5-7 5-8

[0030] It is understandable that the higher the propagation loss of a wireless signal during propagation, the worse its coverage. In actual communication, the wired transmission power of communication equipment has a maximum limit. Because the transmission capability of communication equipment is less than that of a base station, the uplink capability of the communication equipment is often the bottleneck of communication. Furthermore, since the number of receiving antennas on a communication equipment is less than the number of transmitting antennas (commonly one or two transmitting antennas), in scenarios where external antennas are used, the transmission capability of the transmitting antenna is often the bottleneck of communication. Therefore, improving the transmission capability of external antennas is beneficial to improving the transmission performance of communication equipment. To this end, in order to improve the uplink performance of communication equipment using external antennas, this application provides a radio frequency system and a communication device.

[0031] This application provides a radio frequency (RF) system, which is installed in a communication device to enable the communication function of the device. The communication device may be, but is not limited to, a mobile phone, telephone, smart wearable device (such as a smartwatch), tablet computer, and customer premise equipment (CPE). For ease of explanation, in the embodiments of this application, a customer premise device is used as an example for illustration.

[0032] Customer front-end equipment (FNA) is used to enable network access, converting the operator's public WAN (WAN) network to the user's home local area network (LAN). Current broadband internet access methods can be categorized into fiber-to-the-home (FTTH), digital subscriber line (DSL), cable TV, and mobile access. Mobile access can be achieved through FNA. A FNA is a device that receives mobile signals and relays them as Wi-Fi signals. It also converts high-speed 4G or 5G signals into Wi-Fi signals, supporting multiple mobile devices accessing the network simultaneously.

[0033] Figure 1 This is a schematic diagram of the external structure of a customer front-end device 10 according to an embodiment, with reference to... Figure 1 The customer front-end device 10 includes a housing 11 and a circuit board (not shown), as well as an RF system disposed on the housing 11, which is electrically connected to the circuit board. Furthermore, the housing 11 forms a mounting cavity in which the circuit board and the RF system are mounted, and the housing 11 provides support, positioning, and protection.

[0034] refer to Figure 1The housing 11 is generally cylindrical, and the appearance of the client front-end device 10 is primarily represented by the housing 11. In other embodiments, the housing 11 may have other shapes, such as prisms. The circuit board may have multiple interfaces 13 exposed to the housing 11, which are electrically connected to the circuit board. Exemplarily, the interfaces 13 include a power interface 131, a USB interface 133, a network cable interface 135, a telephone interface, etc. The power interface 131 is used to connect an external power source to power the client front-end device 10, and the USB interface 133 is used for data transmission between the client front-end device 10 and external devices. Of course, the USB interface 133 and the power interface 131 can be integrated into one unit to simplify the arrangement of the interfaces 13 of the client front-end device 10. The network cable interface 135 may further include a wired network access port and a wired network output port. The client front-end device 10 can connect to the network through the wired network access port and then connect to other devices through one or more wired network output ports. Of course, in some implementations, the wired network output can be omitted. That is, after the client front-end device 10 connects to the network using a wired network input, it uses a radio frequency system to convert the wired network into a wireless network (e.g., WiFi) for external devices to access the network. Of course, both the wired network input and output can be omitted. In this implementation, the client front-end device 10 can connect to a cellular network (also known as a mobile network) through a radio frequency system and then convert it into a WiFi signal for external devices to access the network.

[0035] The housing 11 may also be equipped with a button 14 or similar structure, which is used to control the operating status of the customer front-end device 10. For example, a user can press the button 14 to start or stop the customer front-end device 10. The housing 11 may also be equipped with indicator lights or similar devices to indicate the operating status of the customer front-end device 10. In some embodiments, the button 14 and multiple interfaces 13 are located on the same side of the circuit board and exposed on the same side of the housing 11. This arrangement facilitates the assembly of the button 14 and interfaces 13 with the circuit board, improves the appearance of the customer front-end device 10, and enhances ease of use. Of course, this arrangement can be replaced with other arrangements; for example, the interfaces 13 and the button 14 may be exposed on different sides of the housing 11.

[0036] refer to Figure 2 , Figure 2 This is a structural block diagram of a radio frequency (RF) system provided in one embodiment. In this embodiment, the RF system includes an antenna interface 100, an RF circuit 200, a processing circuit 300, and an RF front-end circuit 400.

[0037] The antenna interface 100 is used to connect to an external antenna. There can be one or more antenna interfaces 100 to meet the communication needs of the customer's front-end equipment. In this embodiment, the number of antenna interfaces 100 in the radio frequency system is not limited. The external antenna is used to transmit and receive radio frequency signals. The external antenna can be any type of antenna, such as a 5G antenna, 4G antenna, or WiFi antenna, to meet the transmission and reception requirements of radio frequency signals in different frequency bands. In this embodiment, the type of external antenna connected to the antenna interface 100 is not limited.

[0038] The detection circuit 200 is connected to the antenna interface 100. The detection circuit 200 can generate access information after detecting that an external antenna is connected to the antenna interface 100, thereby detecting whether an external antenna is connected to the antenna interface 100. The access information indicates that an external antenna is connected to the antenna interface 100. In this embodiment, the content and form of the access information are not limited.

[0039] The processing circuit 300 is connected to the detection circuit 200. The processing circuit 300 compensates for the transmission parameters of the radio frequency (RF) signal based on the access information, adjusting the RF signal transmission parameters to meet the system's transmission performance requirements. The transmission parameters represent the transmission performance of the RF front-end circuit 400, including but not limited to transmission power. Specifically, the transmission power of the RF signal can be compensated based on the insertion loss value of the external antenna, thereby improving the transmission performance of the external antenna.

[0040] The radio frequency (RF) front-end circuit 400 is connected to the processing circuit 300 and the antenna interface 100, respectively. The RF front-end circuit 400 supports the transmission processing of RF signals to transmit compensated RF signals through an external antenna. The RF front-end circuit 400 can also support the reception processing of RF signals. For example, the RF front-end circuit 400 may include a low-noise amplifier (LNA), an RF switch, a filter, a combiner, etc. The RF front-end circuit 400 works in conjunction with the processing circuit 300 and can be used to adjust the gain. In this embodiment, no specific limitations are made on the specific structure of the RF front-end circuit 400.

[0041] In the radio frequency system provided in the above embodiment, after the detection circuit 200 detects that the antenna interface 100 is connected to an external antenna, it generates access information. Then, the processing circuit 300 compensates the transmission parameters of the radio frequency signal according to the access information, and then transmits the compensated radio frequency signal through the radio frequency front-end circuit 400 and the external antenna. Compared with directly transmitting the radio frequency signal through the external antenna, the transmission parameters of the radio frequency signal are compensated before transmission, which compensates for the performance loss caused by the insertion loss of the external antenna, fills the shortcoming of the external antenna in transmission, and improves the transmission performance of the radio frequency system.

[0042] refer to Figure 3 , Figure 3 This is a structural block diagram of a communication device provided in one embodiment. In this embodiment, the detection circuit 200 may include a detection module 210 and a determination module 220.

[0043] The detection module 210 is connected to the antenna interface 100. The detection module 210 is used to detect the electrical parameter information of the external antenna when the external antenna is connected to the antenna interface 100. The electrical parameter information is used to represent the relevant performance of the external antenna connected to the antenna interface 100, including but not limited to voltage, current, etc. In this embodiment, the specific type of electrical parameter information of the external antenna is not limited.

[0044] The determining module 220 is connected to the detection module 210 and the processing circuit 300, respectively. The determining circuit 220 generates access information based on the electrical parameters of the external antenna. This access information includes the characteristic attribute information of the external antenna. The characteristic attribute information represents information related to the attributes, such as the internal structure and performance of the external antenna. For example, the characteristic attribute information includes the antenna model information of the external antenna. In this embodiment, the characteristic attribute information of the external antenna is not limited. Based on this, the processing circuit 300 can compensate for the transmission parameters of the radio frequency signal according to the characteristic attribute information in the access information, reducing the impact of factors such as insertion loss of the external antenna on the system's transmission performance, improving the system's transmission performance, and further improving the compensation accuracy for the radio frequency signal to meet the system's uplink performance requirements.

[0045] Please continue reading Figure 3 The detection module 210 may include a first resistor R1 and a voltage detection unit 211. The first end of the first resistor R1 is connected to both the antenna interface 100 and the radio frequency front-end circuit 400, and the second end of the first resistor R1 is used to receive the reference voltage signal Vcc. In this embodiment, the resistance value of the first resistor R1 and the voltage value of the reference voltage signal Vcc are not limited and can be preset.

[0046] Voltage detection unit 211 is connected to the first terminal of the first resistor R1, and is used to obtain the first voltage V1 of the first resistor R1. In this embodiment, the electrical parameter information of the external antenna includes the first voltage V1. The first voltage V1 is related to the resistance value of the second resistor R2, which is an auxiliary resistor of the external antenna. When an external antenna is connected to the antenna interface 100, the first resistor R1 and the second resistor R2 are connected in parallel, and the first voltage V1 is the voltage divided by the first resistor R1 and the second resistor R2. The first voltage V1 at this time has changed compared to when the antenna interface 100 is not connected to an external antenna. Based on this, the determining module 220 can generate access information according to the first voltage V1 to reflect the situation where the antenna interface 100 is connected to an external antenna, thereby compensating for the transmission parameters of the radio frequency signal, reducing the impact of the insertion loss of the external antenna on the system's transmission performance, and improving the system's uptime capability.

[0047] The second resistor R2 is an auxiliary resistor for the external antenna; it is pre-configured for the external antenna. For example... Figure 3 As shown, the communication device includes an external antenna 510 and a second resistor R2. The external antenna 510 is connected to an antenna interface 100, the first end of the second resistor R2 is connected to the antenna interface 100, and the second end of the second resistor R2 is grounded (GND). In this embodiment, the resistance value of the second resistor R2 is not limited; for example, the resistance value of the second resistor R2 can be preset based on the characteristic attribute information of the external antenna 510. Based on this, after the external antenna 510 is connected to the antenna interface 100, the second resistor R2 will divide the voltage with the first resistor R1, causing a change in the first voltage V1 of the first resistor R1, thereby realizing the detection of the external antenna 510 being connected to the antenna interface 100.

[0048] Please continue reading. Figure 3 The characteristic attribute information of the external antenna 510 may include antenna model information. The antenna model information of the external antenna 510 corresponds to the resistance value of the second resistor R2; different antenna models have different resistance values ​​for the second resistor R2. Based on this, since the resistance value of the first resistor R1 and the voltage value of the reference voltage signal Vcc are preset fixed values, the determining module 220 can also be used to determine the resistance value of the second resistor R2 based on the first voltage V1, and determine the antenna model information of the external antenna 510 based on the resistance value of the second resistor R2. Therefore, the access information generated by the determining module 220 may include antenna model information. The correspondence between the resistance value of the second resistor R2 and the antenna model information can be pre-acquired and stored. In practical applications, the corresponding second resistor R2 can be pre-configured according to the antenna model information of the external antenna 510. This enables the identification of different models of external antennas.

[0049] Based on the above, the processing circuit 300 can also be used to determine the transmission parameters of the compensated radio frequency signal according to the antenna model information and the mapping relationship. The mapping relationship is pre-stored and includes the correspondence between antenna signal information and transmission parameters. Taking transmission power as an example, the mapping relationship includes the correspondence between antenna model information and transmission power. Since the insertion loss of different types of external antennas may vary, after the determination module 220 identifies the antenna model information of the external antenna, it adaptively compensates the transmission parameters of the radio frequency signal based on the antenna model information, reducing the impact deviation caused by different insertion losses of the external antenna, thereby improving the performance consistency of the system transmitting signals through the external antenna.

[0050] See Figure 4 , Figure 4 A block diagram of a radio frequency system provided for another embodiment. In this embodiment, the detection circuit 200 may further include at least one of a first isolation circuit 230 and a second isolation circuit 240. Figure 4 The radio frequency system shown includes a first isolation circuit 230 and a second isolation circuit 240. Optionally, the detection circuit 200 may include the first isolation circuit 230, or the detection circuit may include the second isolation circuit 240; this embodiment does not limit this in any way.

[0051] The first isolation circuit 230 is connected to both the RF front-end circuit 400 and the antenna interface 100. The first isolation circuit 230 isolates the compensated RF signal transmitted between the RF front-end circuit 400 and the antenna interface 100. The RF signal transmitted between the RF front-end circuit 400 and the antenna interface 100 is generally a high-frequency AC signal. For example, the first isolation circuit 230 may include at least one of a capacitor and an inductor, without any limitation herein. Figure 4 In the first isolation circuit 230, a first capacitor C1 is included.

[0052] The second isolation circuit 240 is connected to both the detection circuit and the antenna interface 100. The second isolation circuit 240 is used to compensate for the RF signal transmitted between the RF front-end circuit 400 and the antenna interface 100. For example, the second isolation circuit 240 may include a capacitor and / or an inductor, without any limitation herein. Figure 4 In the second isolation circuit 240, there is a first inductor L1. The first end of the first inductor L1 is connected to the voltage detection unit 211 and the first resistor R1 in the detection circuit, respectively. The second end of the first inductor L1 is connected to the antenna interface 100.

[0053] In one embodiment, the processing circuit 300 can also be used to compensate the transmission power of the radio frequency signal based on the access information and preset compensation parameters. The preset compensation parameters are pre-set, such as 2dBm, 4dBm, and 5dBm, and are not limited herein. For example, if the insertion loss of the external antenna is 2dBm, the preset compensation parameter can be set to 2dBm. In this case, after the detection circuit 200 detects that the external antenna is connected to the antenna interface 100, the processing circuit 300 increases the transmission power of the radio frequency signal by 2dBm, thereby improving the system's transmission performance and reducing the performance loss caused by the insertion loss of the external antenna.

[0054] For example, the transmit power of a radio frequency system is normally set to 23dBm. At this time, the efficiency of the built-in antenna is 50%, and the total power transmitted to the air interface is 20dBm. If an external antenna is connected, considering the 2dB insertion loss caused by the cable, and the actual efficiency of the external antenna is also 50%, the actual total transmit power is 18dBm. This application can increase the transmit power by 2dBm to ensure the consistency of the system's radiation capability in space, thereby making up for the shortcomings of the external antenna in transmission.

[0055] See Figure 5 , Figure 5 This is a block diagram of a radio frequency (RF) system provided in another embodiment. In this embodiment, the processing circuit 300 includes a processor 310 and an RF transceiver 320. The processor 310 is connected to the detection circuit 200 and is used to generate a compensation command based on access information. This compensation command is used to control the RF transceiver 320. The RF transceiver 320 is connected to both the processor 310 and the RF front-end circuit 400. The RF transceiver 320 can be used to compensate the transmission power of the RF signal according to the compensation command. For example, taking an insertion loss of 3dBm from an external antenna as an example, when the detection circuit 200 detects an external antenna connected to the antenna interface, it generates access information. Then, the processor 310 generates a compensation command based on the access information and preset compensation parameters. This compensation command includes the preset compensation parameter 3dBm. The RF transceiver 240 then increases the transmission power of the RF signal by 3dBm to ensure the performance of the signal transmitted through the external antenna.

[0056] Alternatively, please continue to refer to Figure 5When the detection circuit 200 includes a first resistor R1, a voltage detection unit 211, and a determination module 220, the voltage detection unit 211 acquires the first voltage V1 of the first resistor R1, and the determination module 220 determines the resistance value of the second resistor R2 and the antenna model information corresponding to the resistance value based on the first voltage V1, and generates access information, which includes the antenna model information. Then, the processor 310 determines the transmit power compensation value corresponding to the antenna model information as 3dBm based on the access information, generates a compensation command, and then increases the transmit power of the radio frequency signal by 3dBm through the radio frequency transceiver 240, thereby improving the transmit performance through the external antenna.

[0057] See Figure 6 , Figure 6 One of the structural block diagrams of a radio frequency (RF) system provided in another embodiment includes an RF front-end circuit 400 comprising an RF transceiver module 410 and a switching module 420. The RF transceiver module 410 is connected to the processing circuit 300 and is used to support the transmission processing of RF signals. Exemplarily, the RF transceiver module 410 may include a low-noise amplifier, a filter, etc., without any limitation herein.

[0058] The switch module 420 includes a first terminal P1 and two second terminals. The first terminal P1 of the switch module 420 is connected to the RF transceiver module 410, one second terminal P2 is connected to the antenna interface 100, and the other second terminal P3 is used to connect to the built-in antenna 600. The control terminal of the switch module 420 is connected to the processing circuit 300. The processing circuit 300 is also used to control the switch module 420 to establish a connection between the RF transceiver module 410 and the antenna interface 100 based on access information.

[0059] In one embodiment, the processing circuit is further configured to control the switch module 420 to connect the RF transceiver module 410 and the built-in antenna 600 when no external antenna is connected to the antenna interface 100. Based on this, switching between the built-in antenna and the external antenna can be achieved, improving the applicability of the RF system.

[0060] See Figure 7 , Figure 7 This is a structural block diagram of a communication device provided in another embodiment. In this embodiment, the communication device includes an external antenna 510 and a radio frequency system provided in any of the above embodiments. The external antenna is connected to the antenna interface of the radio frequency system. For a detailed description of each structure in the radio frequency system, please refer to the content related to the radio frequency system in the above embodiments; it will not be repeated here. Figure 7In this embodiment, the radio frequency system includes an antenna interface 100, a detection circuit 200, a processing circuit 300, and a radio frequency front-end circuit 400. Optionally, the communication device can be a customer front-end device, a mobile phone, a tablet computer, or other devices with signal transmission and reception capabilities; this embodiment is not limited to any particular device.

[0061] In the communication device provided in the above embodiment, after the detection circuit 200 detects that the antenna interface 100 is connected to an external antenna, it generates access information. Then, the processing circuit 300 compensates the transmission parameters of the radio frequency signal according to the access information. Subsequently, the compensated radio frequency signal is transmitted through the radio frequency front-end circuit 400 and the external antenna 510. Compared with transmitting the radio frequency signal directly through the external antenna 510, it compensates for the performance loss caused by the insertion loss of the external antenna 510, thereby filling the shortcoming of the external antenna 510 in transmission and improving the transmission performance of the radio frequency system.

[0062] Please continue reading Figure 7 In this embodiment, the communication device may further include a second resistor R2. The first end of the second resistor R2 is connected to both the antenna interface 100 and the external antenna 510, and the second end of the second resistor R2 is grounded (GND). Based on this, after the external antenna 510 is connected to the antenna interface 100, the detection circuit 200 can detect the resistance value of the second resistor R2, thereby adaptively compensating for the transmission power of the radio frequency signal and improving the compensation accuracy of the communication device.

[0063] Please continue reading Figure 7 In this embodiment, the communication device may further include at least one of a third isolation circuit 520 and a fourth isolation circuit 530. Figure 7 In this embodiment, the external antenna 510 includes a third isolation circuit 520 and a fourth isolation circuit 530. Optionally, the external antenna 510 may include the third isolation circuit 520, or the external antenna 510 may include the fourth isolation circuit 530; this embodiment does not limit this in any way.

[0064] The third isolation circuit 520 is connected to both the antenna interface 100 and the external antenna 510. The third isolation circuit 520 isolates the compensated radio frequency (RF) signal transmitted between the antenna interface 100 and the external antenna 510. For example, the RF signal transmitted between the antenna interface 100 and the external antenna 510 is a low-frequency DC signal. For example, the third isolation circuit 520 may include at least one of a capacitor and an inductor. Figure 7In this circuit, the third isolation circuit 520 includes a second capacitor C2. The fourth isolation circuit 530 is connected to the first terminal of the second resistor R2 and the antenna interface 100, respectively. The fourth isolation circuit 530 is used for the compensated radio frequency signal transmitted between the antenna interface 100 and the external antenna 510. For example, the fourth isolation circuit 530 may include at least one of a capacitor and an inductor. Figure 7 In this embodiment, the fourth isolation circuit 530 includes a second inductor L2. Based on this, the third isolation circuit 520 and the fourth isolation circuit 530, combined with the first isolation circuit and the second isolation circuit of the RF system in the above embodiment, can isolate the compensated RF signals at both ends of the antenna interface 100, namely the high-frequency AC signal transmitted through the path between the RF front-end circuit 400 and the antenna interface 100, and the low-frequency DC signal transmitted through the path between the antenna interface 100 and the external antenna 510, so as to improve the uplink performance of the communication equipment.

[0065] See Figure 8 , Figure 8 A structural block diagram of a communication device provided in another embodiment. (See diagram below.) Figure 8 As shown, the communication device includes a radio frequency (RF) system, an external antenna 510, a second resistor R2, a second capacitor C2, and a second inductor L2. The RF system includes an antenna interface 100, a voltage detection unit 211, a determination module 220, a processor 310, an RF transceiver 320, an RF transceiver module 410, a switch module 420, a first resistor R1, a first capacitor C1, a first inductor L1, and a built-in antenna 600. The external antenna 510 is connected to the antenna interface 100.

[0066] When the external antenna 510 is connected to the antenna interface 100, the voltage detection unit 211 obtains the first voltage V1 of the first resistor R1, then the determination module 220 determines the resistance value of the second resistor R2, and determines the antenna model information of the external antenna 510 based on the resistance value of the second resistor R2, and generates access information, which includes the antenna model information of the external antenna 510. Subsequently, the processor 310 determines the RF signal transmit power compensation value based on the access information and a pre-stored mapping relationship, and performs power compensation on the RF signal transmit power based on this compensation value. Under the control of the processor 310, the switch module 420 connects the RF transceiver module 410 and the antenna interface 100. Thus, the compensated RF signal is transmitted through the RF transceiver 320, the RF transceiver module 410, and the external antenna 510.

[0067] When the external antenna 510 is not connected to the antenna interface 100, the switch module 420 connects the RF transceiver module 420 and the built-in antenna 600, and the communication device can directly transmit RF signals through the built-in antenna 600.

[0068] The aforementioned communication equipment improves the transmission power of the device by checking the antenna interface 100 of the external antenna 510, ensuring consistency in air interface use, reducing the performance impact caused by the insertion loss of the external antenna, and further enhancing uplink capability while ensuring compliance.

[0069] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0070] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0071] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A radio frequency system, characterized in that, include: Antenna interface, used to connect to an external antenna; The detection circuit includes a detection module and a determination module. The detection module is connected to the antenna interface and is used to detect the electrical parameter information of the external antenna when the external antenna is connected to the antenna interface. The determination module is connected to the detection module and is used to generate access information based on the electrical parameter information. The access information includes the characteristic attribute information of the external antenna. The characteristic attribute information includes antenna model information. Different models of external antennas have different insertion losses. A processing circuit, connected to the determining module, is used to compensate the transmission parameters of the radio frequency signal based on the access information; The radio frequency front-end circuit is connected to the processing circuit and the antenna interface respectively, and is used to support the transmission processing of the radio frequency signal so as to transmit the compensated radio frequency signal through the external antenna.

2. The radio frequency system according to claim 1, characterized in that, The detection module includes: A first resistor, the first end of which is connected to the antenna interface and the radio frequency front-end circuit respectively, and the second end of the first resistor is used to receive a reference voltage signal; A voltage detection unit is connected to the first end of the first resistor to obtain the first voltage of the first resistor; wherein, when the external antenna is connected to the antenna interface, the first resistor and the second resistor are connected in parallel, wherein the second resistor is an auxiliary resistor of the external antenna, the first voltage is the electrical parameter information of the external antenna, and the first voltage is related to the resistance value of the second resistor.

3. The radio frequency system according to claim 2, characterized in that, The determining module is further configured to determine the resistance value of the second resistor based on the first voltage, and to determine the antenna model information of the external antenna based on the resistance value of the second resistor; The processing circuit is further configured to determine the transmission parameters for compensating the radio frequency signal based on the antenna model information and the mapping relationship; wherein the mapping relationship includes the correspondence between the antenna model information and the transmission parameters.

4. The radio frequency system according to claim 1, characterized in that, The detection circuit also includes: A first isolation circuit, connected to both the RF front-end circuit and the antenna interface, is used to isolate the compensated RF signal transmitted through the path between the RF front-end circuit and the antenna interface; and / or, The second isolation circuit is connected to the detection module and the antenna interface respectively, and is used to isolate the compensated radio frequency signal transmitted through the path between the radio frequency front-end circuit and the antenna interface.

5. The radio frequency system according to claim 1, characterized in that, The processing circuit includes: A processor, connected to the detection circuit, is used to generate compensation instructions based on the access information; The radio frequency transceiver is connected to the processor and the radio frequency front-end circuit respectively, and is used to compensate the transmission power of the radio frequency signal according to the compensation command.

6. The radio frequency system according to claim 1, characterized in that, The processing circuit is also used to compensate the transmission power of the radio frequency signal based on the access information and preset compensation parameters.

7. The radio frequency system according to claim 1, characterized in that, The radio frequency front-end circuit includes: A radio frequency transceiver module, connected to the processing circuit, is used to support the transmission processing of the radio frequency signal; A switching module, wherein a first terminal of the switching module is connected to the radio frequency transceiver module, a second terminal of the switching module is connected to the antenna interface, another second terminal of the switching module is used to connect to the built-in antenna, and the control terminal of the switching module is connected to the processing circuit; The processing circuit is also used to control the switching module to open the path between the radio frequency transceiver module and the antenna interface according to the access information.

8. The radio frequency system according to claim 7, characterized in that, The processing circuit is also used to control the switching module to open the path between the radio frequency transceiver module and the built-in antenna when the external antenna is not connected to the antenna interface.

9. A communication device, characterized in that, It includes an external antenna and a radio frequency system as described in any one of claims 1-8, wherein the external antenna is connected to the antenna interface of the radio frequency system.

10. The communication device according to claim 9, characterized in that, The communication device also includes: The second resistor has its first end connected to the antenna interface and the external antenna, and its second end grounded.

11. The communication device according to claim 10, characterized in that, The communication device also includes: A third isolation circuit, connected to both the antenna interface and the external antenna, is used to isolate the compensated radio frequency signal transmitted between the antenna interface and the external antenna; and / or, The fourth isolation circuit is connected to the first end of the second resistor and the antenna interface, respectively, and is used to isolate the compensated radio frequency signal transmitted between the antenna interface and the external antenna.

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