Radio frequency front-end module and communication device
Patent Information
- Application Number
- CN202522323493.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-31
- Publication Date
- 2026-10-27
- Estimated Expiration
- 2035-10-31
AI Technical Summary
[0002]在无线信号通信传输的过程中，通常设置有双向耦合器和单刀多掷开关来对多路信号进行切换和检测，但二者带来的较高的插入损耗、成本和设计复杂性，影响天线的性能表现
[0025]上述说明仅是本申请技术方案的概述，为了能够更清楚了解本申请的技术手段，并可依照说明书的内容予以实施，以下以本申请的较佳实施例并配合附图详细说明如后。
Smart Images
Figure CN224909479U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of signal communication technology, and in particular to a radio frequency front-end module and communication device. Background Technology
[0002] In the process of wireless signal communication transmission, bidirectional couplers and single-pole multi-throw switches are usually used to switch and detect multiple signals. However, the high insertion loss, cost and design complexity brought about by these two methods affect the performance of the antenna. Utility Model Content
[0003] The purpose of this application is to provide a radio frequency front-end module and a communication device, the technical solution of which is as follows:
[0004] The first aspect of this application provides a radio frequency front-end module, including:
[0005] The target transmission line is used to connect the radio frequency signal transmitter and the antenna.
[0006] A coupling line is set on one side of the target transmission line and parallel to the target transmission line. At the same time, it can couple and extract the power signal of the target transmission line in one of the first and second directions.
[0007] Wherein, the first direction is the direction from the radio frequency signal transmitting end to the antenna, and the second direction is the direction from the antenna to the radio frequency signal transmitting end;
[0008] The switching module, connected to the coupling line, is used to switch the direction of the coupling extracted by the coupling line.
[0009] In some embodiments, the aforementioned radio frequency front-end module, wherein the switching module has a switchable first state and a second state, wherein in the first state, the coupling line is used to couple and extract a first power signal of the target transmission line in a first direction, and in the second state, the coupling line is used to couple and extract a second power signal of the target transmission line in a second direction; it also includes a control module, which is communicatively connected to the switching module and is used to control the switching module to switch between the first state and the second state.
[0010] In some embodiments, the aforementioned radio frequency front-end module includes a switching module comprising a double-pole double-throw switch. The double-pole double-throw switch has a first port, a second port, a third port, and a fourth port. The first port is connected to a first target end of the coupling line, the second port is connected to a second target end of the coupling line, and the third port is connected to a detection module provided by the communication device. In a first state, the first port and the third port are connected, and a first power signal coupled by the coupling line is transmitted to the detection module provided by the communication device via the first port and the third port. In a second state, the second port and the third port are connected, and a second power signal coupled by the coupling line is transmitted to the detection module provided by the communication device via the second port and the third port. The first target end is the end of the coupling line closest to the antenna in a first direction, and the second target end is the end of the coupling line closest to the radio frequency signal transmitting end in a first direction.
[0011] In some embodiments, the aforementioned RF front-end module includes a target transmission line comprising a third transmission line and a fourth transmission line; a coupling line comprising a third coupling line and a fourth coupling line, wherein the third coupling line and the fourth coupling line are connected in series; the third coupling line is disposed on one side of the third transmission line and parallel to the third transmission line, and is used to couple and extract the power signal of the third transmission line in one of the first and second directions at the same time; the fourth coupling line is disposed on one side of the fourth transmission line and parallel to the third transmission line, and is used to couple and extract the power signal of the fourth transmission line in one of the first and second directions at the same time.
[0012] A second aspect of this application provides a communication device, comprising:
[0013] Radio frequency signal transmitter;
[0014] antenna;
[0015] The target transmission line is used to connect the radio frequency signal transmitter and the antenna.
[0016] A coupling line is set on one side of the target transmission line and parallel to the target transmission line. At the same time, it can couple and extract the power signal of the target transmission line in one of the first and second directions.
[0017] Wherein, the first direction is the direction from the radio frequency signal transmitting end to the antenna, and the second direction is the direction from the antenna to the radio frequency signal transmitting end;
[0018] The switching module, connected to the coupling line, is used to switch the direction of the coupling extracted by the coupling line;
[0019] The detection module, connected to the coupling line, is used to process the power signal extracted by coupling through the coupling line.
[0020] In some embodiments, the aforementioned communication device includes a filtering network connected between the switching module and the detection module. The filtering network includes a series inductor and a parallel capacitor and is used to filter the power signal.
[0021] In some embodiments, the aforementioned communication device includes an adjustable matching network between the coupling line and the switching module.
[0022] In some embodiments, the aforementioned communication device includes a target transmission line comprising a first transmission line and a second transmission line, and a coupling line comprising a first coupling line and a second coupling line; a switching module comprising a first switching module and a second switching module; a first coupling line disposed on one side of the first transmission line and parallel to the first transmission line, and used at the same time to couple and extract power signals of the first transmission line in one of a first direction and a second direction; a second coupling line disposed on one side of the second transmission line and parallel to the second transmission line, and used at the same time to couple and extract power signals of the second transmission line in one of a first direction and a second direction; a first switching module connected to the first coupling line, and used to switch the direction of coupling and extraction by the first coupling line; and a second switching module connected to the second coupling line, and used to switch the direction of coupling and extraction by the second coupling line.
[0023] In some embodiments, the aforementioned communication device includes a first switching module and a second switching module connected to a port of a control module. The control module controls one of the switching modules to switch between a first state and a second state at the same time.
[0024] In some embodiments, the aforementioned communication device further includes: an antenna tuner connected to an antenna, the antenna tuner having multiple antenna impedance state parameters; wherein, the detection module feeds back a received second power signal to the antenna tuner, the antenna tuner is able to respond to the second power signal and invoke any one of the multiple antenna impedance state parameters to adjust the antenna.
[0025] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, the preferred embodiments of this application are described in detail below with reference to the accompanying drawings. Attached Figure Description
[0026] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0027] Figure 1This schematic diagram illustrates a structure for extracting the power signal of a target transmission line in a first direction using a coupling line of a radio frequency front-end module provided in this application.
[0028] Figure 2 This schematic diagram illustrates the structure of a RF front-end module according to this application, which extracts the power signal of a target transmission line in the second direction using a coupling line coupling.
[0029] Figure 3 This schematically illustrates a structural diagram of a radio frequency front-end module provided in this application, showing the extraction of power signals from a third transmission line via a third coupling line.
[0030] Figure 4 The schematic diagram illustrates the structure of a communication device provided in this application, in which a first coupling line couples and extracts the power signal of a first transmission line, and a second coupling line couples and extracts the power signal of a second transmission line.
[0031] Explanation of reference numerals in the attached figures:
[0032] 1. Target transmission line; 11. First transmission line; 12. Second transmission line; 13. Third transmission line; 14. Fourth transmission line;
[0033] 2. Radio frequency signal transmitter;
[0034] 3. Antenna;
[0035] 4. Coupler line; 41. First target end; 42. Second target end; 43. First coupling line; 44. Second coupling line; 45. Third coupling line; 46. Fourth coupling line;
[0036] 5. Switching module; 51. First port; 52. Second port; 53. Third port; 54. Fourth port; 55. First switching module; 56. Second switching module;
[0037] 6. Single-pole double-throw switch;
[0038] 7. Detection module;
[0039] A. First direction; B. Second direction. Detailed Implementation
[0040] The embodiments of this disclosure will be further described in detail below with reference to the accompanying drawings and examples. The detailed description of the embodiments and the accompanying drawings are used to illustrate the principles of this disclosure by way of example, but should not be used to limit the scope of this disclosure. This disclosure can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.
[0041] These embodiments are provided to make the disclosure thorough and complete, and to fully express the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, material composition, numerical expressions, and values set forth in these embodiments should be interpreted as exemplary only and not as limiting.
[0042] It should be noted that, in the description of this disclosure, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientation or positional relationship, are only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.
[0043] Furthermore, the terms "first," "second," and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. "Vertical" is not strictly vertical, but within the permissible margin of error. "Parallel" is not strictly parallel, but within the permissible margin of error. Terms such as "including" or "contains" mean that the element preceding the word encompasses the element listed after the word, and do not exclude the possibility of encompassing other elements as well.
[0044] It should also be noted that, in the description of this disclosure, unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this disclosure depending on the specific circumstances. When a particular device is described as being located between a first device and a second device, an intermediary device may or may not be present between the particular device and the first or second device.
[0045] All terms used in this disclosure have the same meaning as understood by one of ordinary skill in the art to which this disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and not as idealized or highly formalized, unless expressly defined herein.
[0046] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.
[0047] Example 1
[0048] like Figure 1 and Figure 2 As shown, the first aspect of this application provides a radio frequency front-end module, including: a target transmission line, a coupling line, and a switching module; the target transmission line is used to connect a radio frequency signal transmitter and an antenna; the coupling line is disposed on one side of the target transmission line and parallel to the target transmission line, and can couple and extract power signals from the target transmission line in one of a first direction and a second direction at the same time; wherein, the first direction is the direction from the radio frequency signal transmitter to the antenna, and the second direction is the direction from the antenna to the radio frequency signal transmitter; the switching module is connected to the coupling line and is used to switch the direction extracted by the coupling line.
[0049] Specifically, the target transmission line is located between the power amplifier of the radio frequency front-end module of the communication device and the antenna of the communication device, and is used to connect the radio frequency signal transmitter and the antenna to form a radio frequency signal transmission channel between the radio frequency signal transmitter and the antenna.
[0050] The coupling line is set on one side of the target transmission line and parallel to the target transmission line. When the radio frequency signal is transmitted in the target transmission line, the radio frequency current in the target transmission line will generate an alternating magnetic field. According to Faraday's law of electromagnetic induction, the alternating magnetic field can induce a current in the coupling line, so that the coupling line and the target transmission line can achieve electromagnetic field edge coupling. Thus, at the same time, the coupling line can couple and extract the power signal of the target transmission line in one of the first and second directions.
[0051] This application defines a first direction as the direction from the RF signal transmitter to the antenna, and a second direction as the direction from the antenna to the RF signal transmitter. The power signal coupled by the coupling line in the first direction is the first power signal, commonly referred to as the forward power signal; the power signal coupled by the coupling line in the second direction is the second power signal, commonly referred to as the reverse power signal. Compared to traditional bidirectional couplers, this significantly reduces insertion loss, while also reducing cost and design complexity.
[0052] This application includes a switching module in the RF signal transmitter to switch the direction of the coupled line, enabling selective detection of forward or reverse power. The switching module can be a simple switch structure such as a double-pole double-throw switch to achieve the switching function. Compared with traditional single-pole multi-throw switches, it has lower insertion loss and reduces the overall signal attenuation of the system, allowing the gain brought by the ACL (Advanced Closed Loop) to the antenna of the communication device to be fully utilized, rather than being offset by the circuit's own losses.
[0053] This application provides a radio frequency (RF) front-end module, including: a target transmission line, a coupling line, and a switching module; the target transmission line is used to connect an RF signal transmitter and an antenna; the coupling line is disposed on one side of the target transmission line and parallel to the target transmission line, and can couple and extract power signals from the target transmission line in one of a first direction and a second direction at the same time; wherein, the first direction is the direction from the RF signal transmitter to the antenna, and the second direction is the direction from the antenna to the RF signal transmitter; the switching module is connected to the coupling line and is used to switch the direction of coupling and extraction by the coupling line. This application sets a parallel coupling line on one side of the target transmission line, and utilizes the principle of electromagnetic field edge coupling to couple and extract power signals from the target transmission line. Through a coordinated switching module, the selection and adjustment of the coupling and extraction direction can be performed. Compared with the design schemes of bidirectional couplers and single-pole multi-throw switches, this application replaces bidirectional couplers and complex switching networks with a non-intrusive coupling mechanism and a simple switching mechanism, achieving a significant reduction in insertion loss, effective control of hardware costs, and simplification of design complexity. The application of this application solves the technical problem that traditional wireless signal communication transmission typically uses bidirectional couplers and single-pole multi-throw switches to switch and detect multiple signals, but these methods result in high insertion loss, cost, and design complexity, which affect antenna performance.
[0054] like Figure 1 and Figure 2 As shown, in some embodiments, the switching module has a switchable first state and a second state. In the first state, the coupling line is used to couple and extract a first power signal of the target transmission line in a first direction. In the second state, the coupling line is used to couple and extract a second power signal of the target transmission line in a second direction. The module also includes a control module, which is communicatively connected to the switching module and is used to control the switching module to switch between the first state and the second state.
[0055] Specifically, this application sets up a switching module with switchable first and second states. In different states, the switching module can switch the direction of the coupled line to selectively detect forward or reverse power, achieving comprehensive and on-demand monitoring of the antenna system's operating status. When monitoring the transmit link status of the RF signal transmitter is required, the control module controls the switching module to switch to the first state to obtain the first power signal coupled by the coupled line, i.e., the forward power signal mentioned above. When monitoring the antenna matching status is required, the control module controls the switching module to switch to the second state to obtain the second power signal coupled by the coupled line, i.e., the reverse power signal mentioned above, thus achieving advanced closed-loop control of the communication device's ACL. The control module set in this application can be a baseband processor, RF transceiver, microcontroller unit, etc., specifically not limited, as long as it can control the switching module to switch between the first and second states.
[0056] This application, through the state switching design of the switching module and the introduction of the control module, realizes the requirement of extracting forward or reverse power through coupling of the coupling line, and switches between forward and reverse power detection in real time and automatically, thereby improving the flexibility of the radio frequency signal transmitter.
[0057] like Figure 1 and Figure 2 As shown, in some embodiments, the switching module includes a double-pole double-throw switch; the double-pole double-throw switch has a first port, a second port, a third port, and a fourth port, the first port being connected to a first target end of the coupling line, the second port being connected to a second target end of the coupling line, and the third port being connected to a detection module provided by the communication device; in a first state, the first port and the third port are connected, and the first power signal coupled by the coupling line is transmitted to the detection module provided by the communication device via the first port and the third port; in a second state, the second port and the third port are connected, and the second power signal coupled by the coupling line is transmitted to the detection module provided by the communication device via the second port and the third port; wherein, the first target end is the end of the coupling line closer to the antenna in a first direction, and the second target end is the end of the coupling line closer to the radio frequency signal transmitting end in a first direction.
[0058] Specifically, the switching module in this application can achieve the switching function with a simple switching structure such as a double-pole double-throw switch. Compared with the traditional single-pole multi-throw switch, it has lower insertion loss and reduces the overall signal attenuation of the system, so that the gain brought by the ACL to the antenna of the communication device can be fully utilized instead of being offset by the circuit's own loss.
[0059] The double-pole double-throw switch has a first port, a second port, a third port, and a fourth port. The first port is connected to the first target end of the coupling line, the second port is connected to the second target end of the coupling line, and the third port is connected to the detection module set in the communication device. This establishes independent and controllable input channels for the first power signal and the second power signal, providing a basis for the selection of the direction of coupling extraction from the coupling line.
[0060] In the first state, the first port and the third port are connected, and the first power signal coupled by the coupling line is transmitted to the detection module set in the communication device through the first port and the third port. In the second state, the second port and the third port are connected, and the second power signal coupled by the coupling line is transmitted to the detection module set in the communication device through the second port and the third port. Thus, the physical characteristics of the double-pole double-throw switch are utilized to change the signal transmission path and realize the dynamic selection of the first power signal and the second power signal.
[0061] In some embodiments, this application may also implement multiple power signal input detection modules by setting a single-pole double-throw switch or a single-pole multi-throw switch in a double-pole double-throw switch.
[0062] like Figure 3 As shown, in some embodiments, the target transmission line includes a third transmission line and a fourth transmission line; the coupling line includes a third coupling line and a fourth coupling line, with the third coupling line and the fourth coupling line connected in series; the third coupling line is disposed on one side of the third transmission line and parallel to the third transmission line, and is used to couple and extract the power signal of the third transmission line in one of the first and second directions at the same time; the fourth coupling line is disposed on one side of the fourth transmission line and parallel to the third transmission line, and is used to couple and extract the power signal of the fourth transmission line in one of the first and second directions at the same time.
[0063] Specifically, considering the limited number of ports for feedback of positive and negative power signals in the RF front-end module, this application connects the coupling lines of different transmission lines used for coupling the same RF signal transmitter in series. In some embodiments, the target transmission line includes a third transmission line and a fourth transmission line, which are connected to the same RF signal transmitter. Correspondingly, this application provides a third coupling line and a fourth coupling line to couple and extract the power signals on the third and fourth transmission lines respectively. Simultaneously, the third coupling line and the fourth coupling line are connected in series to connect to the ports of the same RF signal transmitter, achieving port resource reuse and saving. Furthermore, this application can connect a switching module to the series-connected third and fourth transmission lines to achieve switching of the coupling extraction direction.
[0064] Example 2
[0065] like Figure 1 and Figure 2 As shown, a second aspect of this application provides a communication device, including a radio frequency signal transmitter, an antenna, a target transmission line, a coupling line, a switching module, and a detection module. The target transmission line is used to connect the radio frequency signal transmitter and the antenna. The coupling line is disposed on one side of the target transmission line and parallel to the target transmission line, and can couple and extract power signals from the target transmission line in one of a first direction and a second direction at the same time. The first direction is the direction from the radio frequency signal transmitter to the antenna, and the second direction is the direction from the antenna to the radio frequency signal transmitter. The switching module is connected to the coupling line and is used to switch the direction coupled and extracted by the coupling line. The detection module is connected to the coupling line and is used to process the power signals coupled and extracted by the coupling line.
[0066] Specifically, in a communication device provided in this application, by setting a parallel coupling line on one side of the target transmission line and utilizing the principle of electromagnetic field edge coupling, the power signal on the target transmission line can be coupled and extracted. A coordinated switching module is used to select and adjust the coupling extraction direction. Compared to the design schemes of bidirectional couplers and single-pole multi-throw switches, this device replaces bidirectional couplers and complex switching networks with a non-intrusive coupling mechanism and a simple switching mechanism, achieving a significant reduction in insertion loss, effective control of hardware costs, and simplification of design complexity. Through the application of this application, the technical problem of high insertion loss, cost, and design complexity affecting antenna performance is solved in traditional wireless signal communication transmission, where bidirectional couplers and single-pole multi-throw switches are typically used to switch and detect multiple signals.
[0067] In some embodiments, a filtering network is connected between the switching module and the detection module. The filtering network includes a series inductor and a parallel capacitor, and is used to filter the power signal.
[0068] Specifically, considering that the power signal extracted by the coupling line is easily affected by various high-frequency noise, harmonic components and adjacent channel interference during transmission, this application connects a filter network between the switching module and the detection module. Through the series inductance's blocking effect on high-frequency interference and the parallel capacitor's shunting effect on high-frequency noise, a low-pass or band-pass filter structure is formed, which effectively suppresses useless signals in the detection channel and only allows the power signal of the target frequency band to pass through, ensuring the purity of the signal received by the detection module and improving the accuracy of the detection results.
[0069] In some embodiments, an adjustable matching network is provided between the coupling line and the switching module.
[0070] Specifically, this application provides an adjustable matching network between the coupling line and the switching module. The adjustable matching network can be composed of an adjustable capacitor or an adjustable inductor. By dynamically adjusting its impedance parameters, it can compensate for coupling fluctuations caused by frequency changes, so that the subsequent switching module and detection module can receive power signals with relatively stable amplitude and consistent quality at different frequency points, thereby ensuring the accuracy and reliability of the detection results.
[0071] like Figure 4As shown, in some embodiments, the target transmission line includes a first transmission line and a second transmission line, and the coupling line includes a first coupling line and a second coupling line; the switching module includes a first switching module and a second switching module; the first coupling line is disposed on one side of the first transmission line and parallel to the first transmission line, and is used to couple and extract the power signal of the first transmission line in one of the first and second directions at the same time; the second coupling line is disposed on one side of the second transmission line and parallel to the second transmission line, and is used to couple and extract the power signal of the second transmission line in one of the first and second directions at the same time; the first switching module is connected to the first coupling line and is used to switch the direction coupled and extracted by the first coupling line; the second switching module is connected to the second coupling line and is used to switch the direction coupled and extracted by the second coupling line.
[0072] Specifically, the communication device has multiple radio frequency signal transmitting ends, such as TX0 (Transmit0, the 0th transmitting end) and TX1 (Transmit1, the 1st transmitting end). In one embodiment, there are two radio frequency signal transmitting ends. Correspondingly, the target transmission line in this application includes a first transmission line and a second transmission line. The first transmission line and the second transmission line can be in different frequency bands or in different spatial locations and can correspond to different antennas in the communication device. The first transmission line and the second transmission line are configured independently. The first transmission line is configured with a first coupling line, and the second transmission line is configured with a second coupling line. The power signal of each antenna can be coupled and directionally selected independently and without interference. The switching module includes a first switching module and a second switching module, which are used to switch the coupling direction of the coupling line of the transmission line corresponding to different transmitting ports, so as to switch the direction extracted by the first coupling line and the second coupling line respectively, so that the communication device can simultaneously monitor the forward transmission power and reverse reflection power of multiple antennas to support the multi-antenna power data monitoring of the communication device. The first switching module and the second switching module can both be double-pole double-throw switches.
[0073] Furthermore, in this application, the first switching module and the second switching module can share GPIO (General Purpose Input / Output), which saves ports and enables synchronous control and time-division multiplexing, improving detection flexibility. In some embodiments, a first single-pole double-throw switch and a second single-pole double-throw switch are provided for the first switching module and the second switching module. The first single-pole double-throw switch, the second single-pole double-throw switch, the first switching module, and the second switching module can also share GPIO, and the specific configuration is not limited.
[0074] In some embodiments, the first switching module and the second switching module are connected to a port of the control module. At the same time, the control module is used to control one of the switching modules to switch between a first state and a second state.
[0075] Specifically, this application can achieve port sharing of the control module by setting the first switching module and the second switching module to be connected to a port of the control module, thereby reducing the occupation of control resources. The control module can control one of the switching modules to switch between the first state and the second state at the same time. That is, only one switching module can be controlled at the same time, avoiding detection signal conflicts and realizing timing isolation. In this way, time-division detection of multiple channels can be realized, ensuring the accuracy and reliability of detection data.
[0076] In some embodiments, the device further includes: an antenna tuner connected to an antenna, the antenna tuner having multiple antenna impedance state parameters; wherein, the detection module feeds back the received second power signal to the antenna tuner, the antenna tuner is able to respond to the second power signal and invoke any one of the multiple antenna impedance state parameters to adjust the antenna.
[0077] Specifically, in order to improve the communication quality and efficiency of the communication device, the communication device of this application is also equipped with an antenna tuner. When the user holds the device or places it close to his head, the antenna impedance will change drastically, resulting in enhanced signal reflection. That is, the power of the second power signal increases at this time. The detection module can feed back to the antenna tuner in real time. The tuner can select the antenna impedance state parameter that best matches the current state from its various antenna impedance state parameters, realize dynamic matching of the antenna impedance state, and thus realize a closed-loop control mechanism based on actual measurement, thereby improving the accuracy and reliability of antenna tuning.
[0078] In one embodiment, the antenna tuner provided in this application may include 256 states such as hand-held, near head, and free state. When the state changes, the detection module feeds back the received second power signal to the antenna tuner, and the antenna tuner calls any one of the 256 antenna impedance state parameters to improve the antenna performance in actual use.
[0079] The embodiments of this disclosure have now been described in detail. To avoid obscuring the concept of this disclosure, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.
[0080] While specific embodiments of this disclosure have been described in detail by way of examples, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of this disclosure. Those skilled in the art should understand that modifications can be made to the above embodiments or equivalent substitutions can be made to some technical features without departing from the scope and spirit of this disclosure. In particular, as long as there is no structural conflict, the technical features mentioned in the various embodiments can be combined in any manner.
Claims
1. A radio frequency front-end module, characterized in that, include: The target transmission line is used to connect the radio frequency signal transmitter and the antenna. A coupling line is disposed on one side of the target transmission line and parallel to the target transmission line, and can couple and extract the power signal of the target transmission line in one of the first and second directions at the same time. Wherein, the first direction is the direction from the radio frequency signal transmitting end to the antenna, and the second direction is the direction from the antenna to the radio frequency signal transmitting end; A switching module, connected to the coupling line, is used to switch the direction of the coupling extracted by the coupling line.
2. The radio frequency front-end module according to claim 1, characterized in that, The switching module has a switchable first state and a second state. In the first state, the coupling line is used to couple and extract a first power signal of the target transmission line in the first direction. In the second state, the coupling line is used to couple and extract a second power signal of the target transmission line in the second direction. It also includes a control module, which is communicatively connected to the switching module and is used to control the switching module to switch between the first state and the second state.
3. The radio frequency front-end module according to claim 2, characterized in that, The switching module includes a double-pole double-throw switch; The double-pole double-throw switch has a first port, a second port, a third port and a fourth port. The first port is connected to the first target end of the coupling line, the second port is connected to the second target end of the coupling line, and the third port is connected to the detection module of the communication device. In the first state, the first port is connected to the third port, and the first power signal coupled by the coupling line is transmitted to the detection module set in the communication device through the first port and the third port; In the second state, the second port and the third port are connected, and the second power signal coupled by the coupling line is transmitted to the detection module set in the communication device through the second port and the third port; Wherein, the first target end is the end of the coupling line that is close to the antenna in the first direction, and the second target end is the end of the coupling line that is close to the radio frequency signal transmitting end in the first direction.
4. The radio frequency front-end module according to claim 1, characterized in that, The target transmission line includes a third transmission line and a fourth transmission line; The coupling line includes a third coupling line and a fourth coupling line, and the third coupling line and the fourth coupling line are connected in series. The third coupling line is disposed on one side of the third transmission line and parallel to the third transmission line, and is used to couple and extract the power signal of the third transmission line in one of the first and second directions at the same time. The fourth coupling line is disposed on one side of the fourth transmission line and parallel to the third transmission line, and is used to couple and extract the power signal of the fourth transmission line in one of the first and second directions at the same time.
5. A communication device, characterized in that, include: Radio frequency signal transmitter; antenna; The target transmission line is used to connect the radio frequency signal transmitter and the antenna. A coupling line is disposed on one side of the target transmission line and parallel to the target transmission line, and can couple and extract the power signal of the target transmission line in one of the first and second directions at the same time. Wherein, the first direction is the direction from the radio frequency signal transmitting end to the antenna, and the second direction is the direction from the antenna to the radio frequency signal transmitting end; A switching module, connected to the coupling line, is used to switch the direction of the coupling extracted by the coupling line; The detection module, connected to the coupling line, is used to process the power signal extracted by coupling through the coupling line.
6. The communication device according to claim 5, characterized in that, A filtering network is connected between the switching module and the detection module. The filtering network includes a series inductor and a parallel capacitor, and is used to filter the power signal.
7. The communication device according to claim 5, characterized in that, An adjustable matching network is provided between the coupling line and the switching module.
8. The communication device according to claim 5, characterized in that, The target transmission line includes a first transmission line and a second transmission line, the coupling line includes a first coupling line and a second coupling line, and the switching module includes a first switching module and a second switching module; The first coupling line is disposed on one side of the first transmission line and parallel to the first transmission line, and is used to couple and extract the power signal of the first transmission line in one of the first and second directions at the same time. The second coupling line is disposed on one side of the second transmission line and parallel to the second transmission line, and is used to couple and extract the power signal of the second transmission line in one of the first and second directions at the same time. The first switching module is connected to the first coupling line and is used to switch the direction of the coupling extracted by the first coupling line; The second switching module is connected to the second coupling line and is used to switch the direction of the extraction coupled by the second coupling line.
9. The communication device according to claim 8, characterized in that, The first switching module and the second switching module are connected to a port of the control module. At the same time, the control module is used to control one of the switching modules to switch between the first state and the second state.
10. The communication device according to claim 5, characterized in that, Also includes: An antenna tuner, connected to the antenna, having a variety of antenna impedance state parameters; The detection module feeds back the received second power signal to the antenna tuner. The antenna tuner can respond to the second power signal and call any one of the various antenna impedance state parameters to adjust the antenna.