CN114430281A - Impedance matching method and device, electronic equipment and readable storage medium - Google Patents
Impedance matching method and device, electronic equipment and readable storage medium Download PDFInfo
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Abstract
The embodiment of the application is applicable to the technical field of antennas, and provides an impedance matching method, an impedance matching device, an electronic device and a readable storage medium, wherein a first target parameter of an impedance matching network is obtained by obtaining a working frequency band of an antenna, reflection coefficient information and a current parameter of the impedance matching network, and inputting the working frequency band, the reflection coefficient information and the current parameter of the impedance matching network into an impedance matching model, that is, the first target parameter of the impedance matching network, which enables the conduction gain of the antenna in the working frequency band to be maximum, can be output at one time through the impedance matching model in the embodiment of the application, so that the impedance values of elements in the impedance matching network are adjusted according to the change of the conduction gain of the antenna after the impedance values of the elements in the impedance matching network are replaced at one time in the conventional technology until the conduction gain of the antenna is maximum, the efficiency and intelligence of obtaining the first target parameter of the impedance matching network is improved.
Description
Technical Field
The embodiment of the application relates to the technical field of antennas, in particular to an impedance matching method, an impedance matching device, electronic equipment and a readable storage medium.
Background
With more and more functions integrated on electronic equipment, more and more other electronic devices encroach on the space occupied by the antenna in the electronic equipment, so that the clearance space of the antenna is smaller and smaller, the size of the antenna is also continuously reduced, and the performance of the antenna is poor.
In order to reduce the reduction of the antenna performance caused by the reduction of the antenna clearance space and the reduction of the antenna size due to the space encroachment, at the present stage, the impedance information of the antenna is usually obtained through an impedance detection module, and then an impedance matching network of the antenna is adjusted according to the obtained impedance information, so that the impedance of the antenna is matched with the impedance of the radio frequency front end, and the antenna performance is improved. However, with the conventional method, it is usually necessary to acquire impedance information of the antenna many times, and adjust the impedance matching network of the antenna many times according to the impedance information until the impedance of the antenna matches the impedance of the rf front end.
Therefore, how to improve the intelligence of the impedance matching network for adjusting the antenna becomes a problem to be solved urgently.
Disclosure of Invention
Embodiments of the present application provide an impedance matching method, an impedance matching device, an electronic device, and a readable storage medium, which can improve intelligence of an impedance matching network for adjusting an antenna.
In a first aspect, an impedance matching method includes:
the method comprises the steps of obtaining the working frequency band of an antenna, reflection coefficient information and current parameters of an impedance matching network, wherein the reflection coefficient information is used for indicating the reflection coefficient of an incident port of the antenna, and the current parameters of the impedance matching network are used for indicating the current impedance value of each element in the impedance matching network of the antenna;
and inputting the working frequency band, the reflection coefficient information and the current parameters of the impedance matching network into an impedance matching model to obtain first target parameters of the impedance matching network, wherein the first target parameters of the impedance matching network are used for indicating target impedance values of all elements in the impedance matching network of the antenna, and when the parameters of the impedance matching network of the antenna are the first target parameters, the conduction gain of the antenna in the working frequency band is the maximum.
In the embodiment of the application, a first target parameter of an impedance matching network is obtained by obtaining a working frequency band of an antenna, reflection coefficient information and a current parameter of the impedance matching network, and inputting the working frequency band, the reflection coefficient information and the current parameter of the impedance matching network into an impedance matching model, wherein the reflection coefficient information is used for indicating a reflection coefficient of an incident port of the antenna, the current parameter of the impedance matching network is used for indicating a current impedance value of each element in the impedance matching network of the antenna, the first target parameter of the impedance matching network is used for indicating a target impedance value of each element in the impedance matching network of the antenna, and when the parameter of the impedance matching network of the antenna is the first target parameter, a conduction gain of the antenna at the working frequency band is maximum. That is to say, the first target parameter of the impedance matching network, which enables the antenna to have the maximum conduction gain in the working frequency band, can be output at one time through the impedance matching model in the embodiment of the present application, so that the problem that in the conventional technology, after the impedance value of each element in the impedance matching network is replaced at one time, the impedance value of each element in the impedance matching network is adjusted according to the change of the conduction gain of the antenna until the conduction gain of the antenna is the maximum is solved, and the efficiency and the intelligence for obtaining the first target parameter of the impedance matching network are improved.
In one embodiment, the method further comprises: parameters of an impedance matching network of the antenna are configured according to first target parameters of the impedance matching network.
In the embodiment of the application, the first target parameter of the impedance matching network is obtained by obtaining the working frequency band of the antenna, the reflection coefficient information and the current parameter of the impedance matching network, and inputting the working frequency band, the reflection coefficient information and the current parameter of the impedance matching network into the impedance matching model, and then the parameter of the impedance matching network of the antenna is configured according to the first target parameter of the impedance matching network. The reflection coefficient information is used for indicating the reflection coefficient of an incident port of the antenna, the current parameter of the impedance matching network is used for indicating the current impedance value of each element in the impedance matching network of the antenna, the first target parameter of the impedance matching network is used for indicating the target impedance value of each element in the impedance matching network of the antenna, and when the parameter of the impedance matching network of the antenna is the first target parameter, the conduction gain of the antenna in the working frequency band is the maximum. After the first target parameter of the impedance matching network is obtained according to the impedance matching model, the impedance value of each element in the impedance matching network indicated by the first target parameter is properly adjusted according to the first target parameter of the impedance matching network, and then the impedance value of each element of the impedance matching network is configured, so that the situation that the impedance value of each element of the impedance matching network cannot be adjusted under the condition that the first target parameter of the impedance matching network is an illegal value of each element of the impedance matching network of the antenna is avoided, and the applicability of the first target parameter of the impedance matching network obtained from the impedance matching model is improved.
In an embodiment, the inputting the operating frequency band, the reflection coefficient information, and the current parameter of the impedance matching network into the impedance matching model to obtain the first target parameter of the impedance matching network includes: and inputting the working frequency band, the reflection coefficient information and the current parameters of the impedance matching network into the impedance matching model to obtain a first target parameter and a conduction gain predicted value of the impedance matching network, wherein the conduction gain predicted value is used for representing the conduction gain of the antenna when the parameters of the impedance matching network are the first target parameter.
In the embodiment of the application, the working frequency band, the reflection coefficient information and the current parameter of the impedance matching network are input into the impedance matching model to obtain the first target parameter and the predicted conduction gain value of the impedance matching network, wherein the larger the predicted conduction gain value is, the more matched the impedance of the radio-frequency antenna circuit and the impedance of the radio-frequency front end is. Under a possible condition, whether the output first target parameter of the impedance matching network is accurate or not can be determined according to the conduction gain predicted value, and therefore the accuracy of inputting the working frequency band, the reflection coefficient information and the current parameter of the impedance matching network into the impedance matching model to obtain the first target parameter of the impedance matching network is improved.
In one embodiment, the method further comprises: obtaining a difference value between the conduction gain predicted value and the current conduction gain of the antenna; the current conduction gain refers to the conduction gain of the antenna when the parameters of the impedance matching network of the antenna are the current parameters; and under the condition that the difference value is larger than a first preset threshold value, configuring the parameters of the impedance matching network of the antenna as first target parameters.
In one embodiment, the method further comprises: obtaining a difference value between a conduction gain prediction value and a current conduction gain of the antenna, wherein the current conduction gain refers to the conduction gain of the antenna when a parameter of an impedance matching network of the antenna is a current parameter, and the conduction gain prediction value refers to the conduction gain of the antenna when the parameter of the impedance matching network is a first target parameter; and keeping the impedance value of each element in the impedance matching network of the antenna unchanged under the condition that the difference value is smaller than or equal to the first preset threshold value.
In the embodiment of the application, the working frequency band, the reflection coefficient information and the current parameter of the impedance matching network are input into the impedance matching model to obtain the first target parameter and the conduction gain predicted value of the impedance matching network, and the difference value between the conduction gain predicted value and the current conduction gain of the antenna is obtained, so that the current parameter of the impedance matching network is kept unchanged under the condition that the difference value is smaller than or equal to the first preset threshold value. Therefore, the condition that the ping-pong switching of the impedance matching network is caused by the small difference between the predicted value of the conduction gain and the current conduction gain can be effectively avoided.
In an embodiment, the keeping the impedance values of the elements in the impedance matching network of the antenna constant includes: and keeping the impedance value of each element in the impedance matching network of the antenna unchanged within a preset time length.
In an embodiment, the obtaining the reflection coefficient information of the antenna includes: acquiring incident voltage and reflected voltage of a coupler connected with an antenna incident port; and obtaining reflection coefficient information according to the incident voltage and the reflection voltage.
In the embodiment of the application, the reflection coefficient information is obtained by the impedance detection module obtaining the incident voltage and the reflection voltage of the coupler connected with the antenna incident port and calculating according to the incident voltage and the reflection voltage. That is to say, the reflection coefficient information can be obtained by acquiring the incident voltage and the reflection voltage of the coupler through the impedance detection module, so that the convenience of acquiring the reflection coefficient information is improved.
In an embodiment, before the obtaining of the operating frequency band of the antenna, the reflection coefficient information, and the current parameter of the impedance matching network, the method further includes: determining whether a transmission port of an antenna is open; determining whether the transmitting power of the antenna is greater than a second preset threshold value or not under the condition that the transmitting port is opened; and acquiring the working frequency band, the reflection coefficient information and the current parameters of the impedance matching network under the condition that the transmitting power is greater than a second preset threshold value.
In the embodiment of the application, before the working frequency band, the reflection coefficient information and the current parameter of the impedance matching network are obtained, whether a transmitting port of the antenna is opened or not may be determined, under the condition that the transmitting port is not opened, the reflection coefficient information cannot be obtained by the impedance detection module, the preset parameter of the impedance matching network corresponding to the scene information may be determined according to the corresponding relationship between the scene information and the parameter of the impedance matching network, that is, under the condition that the reflection coefficient information cannot be obtained due to the condition that the transmitting port of the antenna is not opened, the preset parameter of the impedance matching network corresponding to the scene information may be determined according to the corresponding relationship between the scene information and the parameter of the impedance matching network, and the condition that the first target parameter of the impedance matching network cannot be determined is avoided. Or, before obtaining the working frequency band, the reflection coefficient information, and the current parameter of the impedance matching network, it may be determined whether the transmission port of the antenna is opened, and in a case that the transmission port is opened, it is further determined whether the transmission power is greater than a second preset threshold, in a case that the transmission power is less than or equal to the second preset threshold, on the basis that the transmission port is opened, and in a case that the transmission power is less than or equal to the second preset threshold, the impedance detection module may still not obtain the reflection coefficient information, and may determine the preset parameter of the impedance matching network corresponding to the scenario information according to a correspondence between the scenario information and the parameter of the impedance matching network, that is, the transmission port of the antenna is opened, but in a case that the transmission power is less than or equal to the second preset threshold, according to a correspondence between the scenario information and the parameter of the impedance matching network, the preset parameters of the impedance matching network corresponding to the scene information are determined, and the condition that the first target parameters of the impedance matching network cannot be determined is avoided.
In one embodiment, the method further comprises: under the condition that a sending port of the antenna is not opened, acquiring current scene information of the antenna; or, acquiring current scene information of the antenna under the condition that the transmitting power is less than or equal to a second preset threshold; and determining the preset parameters of the impedance matching network corresponding to the scene information according to the corresponding relation between the scene information and the parameters of the impedance matching network.
In the embodiment of the application, under the condition that the sending port of the antenna is not opened, or the sending port of the antenna is opened, but the transmitting power of the antenna is less than or equal to the second preset threshold, the preset parameter of the impedance matching network corresponding to the scene information can be directly determined according to the corresponding relation between the scene information and the parameter of the impedance matching network, so that the convenience of determining the parameter of the impedance matching network is improved.
In an embodiment, before the inputting the operating frequency band, the reflection coefficient information, and the current parameter of the impedance matching network into the impedance matching model, the method further includes: acquiring sample data, wherein the sample data comprises a sample working frequency band, sample reflection coefficient information and sample parameters of a matching network; the impedance matching model is trained by taking the sample data as input data and second target parameters as target output data to obtain the trained impedance matching model, wherein the second target parameters are parameters of a matching network which enables the conduction gain of the antenna to be maximum when the antenna works in a sample working frequency band.
In the embodiment of the application, the impedance matching model takes the sample data as input data and takes the second target parameter as target output data, and the neural network model is obtained through training, so that the first target parameter and the predicted value of the conduction gain of the impedance matching network obtained by the impedance matching model are more accurate.
In one embodiment, the method further comprises: acquiring the current opening state of each switch in an aperture tuning switch of the antenna, wherein the aperture tuning switch is used for adjusting the electrical length of the antenna; and inputting the working frequency band, the reflection coefficient information, the current opening state of each switch and the current parameters of the impedance matching network into the impedance matching model to obtain the first target parameters of the impedance matching network.
In the embodiment of the application, the first target parameter and the predicted value of the conduction gain of the impedance matching network are obtained by obtaining the working frequency band, the reflection coefficient information, the current on state of each switch in the aperture tuning switch and the current parameter of the impedance matching network, and inputting the working frequency band, the reflection coefficient information, the current on state of each switch in the aperture tuning switch and the current parameter of the impedance matching network into the impedance matching model, so that in the process of obtaining the first target parameter and the predicted value of the conduction gain of the impedance matching network, the machine learning of the current on state of each switch in the aperture tuning switch is increased, namely the influence of the current on state of each switch in the aperture tuning switch on the first target parameter of the impedance matching network is taken as a judgment condition, so that the impedance matching model simulates the state closer to the actual radio frequency antenna circuit, the accuracy of the first target parameter and the predicted value of the conduction gain of the obtained impedance matching network is improved.
In a second aspect, an impedance matching method is provided, where the method is applied to an electronic device, the electronic device includes a radio frequency front end circuit, a radio frequency antenna circuit, an antenna tuning module, and an impedance detection module, the radio frequency antenna circuit includes an antenna, an impedance matching network, and an aperture tuning switch, the antenna is connected to the impedance matching network and the aperture tuning switch, the impedance detection module is connected to the antenna tuning module, and the antenna tuning module includes an impedance matching model; the method comprises the following steps: the impedance detection module acquires reflection coefficient information; the reflection coefficient information is used for indicating the reflection coefficient of an incident port of the antenna; the antenna tuning module acquires the working frequency band of the antenna and the current parameters of the matching network, wherein the current parameters of the matching network are used for indicating the current impedance value of each element in the impedance matching network of the antenna; and inputting the working frequency band, the reflection coefficient information and the current parameters of the matching network into an impedance matching model to obtain first target parameters of the matching network, wherein the first target parameters of the matching network are used for indicating target impedance values of all elements in the impedance matching network of the antenna, and when the parameters of the impedance matching network of the antenna are the first target parameters, the conduction gain of the antenna in the working frequency band is the maximum.
In the embodiment of the application, a first target parameter of an impedance matching network is obtained by obtaining a working frequency band of an antenna, reflection coefficient information and a current parameter of the impedance matching network, and inputting the working frequency band, the reflection coefficient information and the current parameter of the impedance matching network into an impedance matching model, wherein the reflection coefficient information is used for indicating a reflection coefficient of an incident port of the antenna, the current parameter of the impedance matching network is used for indicating a current impedance value of each element in the impedance matching network of the antenna, the first target parameter of the impedance matching network is used for indicating a target impedance value of each element in the impedance matching network of the antenna, and when the parameter of the impedance matching network of the antenna is the first target parameter, a conduction gain of the antenna at the working frequency band is maximum. That is to say, the first target parameter of the impedance matching network, which enables the antenna to have the maximum conduction gain in the working frequency band, can be output at one time through the impedance matching model in the embodiment of the present application, so that the problem that in the conventional technology, after the impedance value of each element in the impedance matching network is replaced at one time, the impedance value of each element in the impedance matching network is adjusted according to the change of the conduction gain of the antenna until the conduction gain of the antenna is the maximum is solved, and the efficiency and the intelligence for obtaining the first target parameter of the impedance matching network are improved.
In one embodiment, the rf front-end circuit includes a coupler, the coupler is respectively connected to an impedance detection module and an impedance matching network, and the impedance detection module obtains reflection coefficient information, including: the impedance detection module acquires incident voltage and reflected voltage of the coupler, and reflection coefficient information is obtained according to the incident voltage and the reflected voltage.
In a third aspect, an impedance matching apparatus is provided that includes means for performing any one of the methods of the first or second aspects. The device can be a terminal device or a chip in the terminal device. The apparatus may include an acquisition unit and a processing unit.
When the apparatus is a terminal device, the processing unit may be a processor, and the input unit may be a communication interface; the terminal device may further comprise a memory for storing computer program code which, when executed by the processor, causes the terminal device to perform the method of any of the first or second aspects.
When the apparatus is a chip in a terminal device, the processing unit may be a processing unit inside the chip, and the input unit may be an output interface, a pin, a circuit, or the like; the chip may also include a memory, which may be a memory within the chip (e.g., registers, cache, etc.) or a memory external to the chip (e.g., read-only memory, random access memory, etc.); the memory is adapted to store computer program code which, when executed by the processor, causes the chip to perform the method of any one of the first or second aspects.
In one possible implementation, the memory is configured to store computer program code; a processor executing the computer program code stored in the memory, the processor being operable when the computer program code stored in the memory is executed to perform: the method comprises the steps of obtaining the working frequency band of an antenna, reflection coefficient information and current parameters of an impedance matching network, wherein the reflection coefficient information is used for indicating the reflection coefficient of an incident port of the antenna, and the current parameters of the impedance matching network are used for indicating the current impedance value of each element in the impedance matching network of the antenna; and inputting the working frequency band, the reflection coefficient information and the current parameters of the impedance matching network into an impedance matching model to obtain first target parameters of the impedance matching network, wherein the first target parameters of the impedance matching network are used for indicating target impedance values of all elements in the impedance matching network of the antenna, and when the parameters of the impedance matching network of the antenna are the first target parameters, the conduction gain of the antenna in the working frequency band is the maximum.
In the embodiment of the application, a first target parameter of an impedance matching network is obtained by obtaining a working frequency band of an antenna, reflection coefficient information and a current parameter of the impedance matching network, and inputting the working frequency band, the reflection coefficient information and the current parameter of the impedance matching network into an impedance matching model, wherein the reflection coefficient information is used for indicating a reflection coefficient of an incident port of the antenna, the current parameter of the impedance matching network is used for indicating a current impedance value of each element in the impedance matching network of the antenna, the first target parameter of the impedance matching network is used for indicating a target impedance value of each element in the impedance matching network of the antenna, and when the parameter of the impedance matching network of the antenna is the first target parameter, a conduction gain of the antenna at the working frequency band is maximum. That is to say, the first target parameter of the impedance matching network, which enables the antenna to have the maximum conduction gain in the working frequency band, can be output at one time through the impedance matching model in the embodiment of the present application, so that the problem that in the conventional technology, after the impedance value of each element in the impedance matching network is replaced at one time, the impedance value of each element in the impedance matching network is adjusted according to the change of the conduction gain of the antenna until the conduction gain of the antenna is the maximum is solved, and the efficiency and the intelligence for obtaining the first target parameter of the impedance matching network are improved.
In a fourth aspect, there is provided a computer readable storage medium having stored computer program code which, when executed by an impedance matching apparatus, causes the impedance matching apparatus to perform the method of the first aspect.
In the embodiment of the application, a first target parameter of the impedance matching network is obtained by obtaining a working frequency band of an antenna, reflection coefficient information and a current parameter of the impedance matching network, and inputting the working frequency band, the reflection coefficient information and the current parameter of the impedance matching network into an impedance matching model, wherein the reflection coefficient information is used for indicating a reflection coefficient of an incident port of the antenna, the current parameter of the impedance matching network is used for indicating a current impedance value of each element in the impedance matching network of the antenna, the first target parameter of the impedance matching network is used for indicating a target impedance value of each element in the impedance matching network of the antenna, and when the parameter of the impedance matching network of the antenna is the first target parameter, a conduction gain of the antenna in the working frequency band is maximum. That is to say, the first target parameter of the impedance matching network, which enables the antenna to have the maximum conduction gain in the working frequency band, can be output at one time through the impedance matching model in the embodiment of the present application, so that the problem that in the conventional technology, after the impedance value of each element in the impedance matching network is replaced at one time, the impedance value of each element in the impedance matching network is adjusted according to the change of the conduction gain of the antenna until the conduction gain of the antenna is the maximum is solved, and the efficiency and the intelligence for obtaining the first target parameter of the impedance matching network are improved.
In a fifth aspect, a computer readable storage medium is provided, which stores computer program code, which, when executed by an impedance matching apparatus, causes the impedance matching apparatus to perform the method of the second aspect.
In the embodiment of the application, a first target parameter of an impedance matching network is obtained by obtaining a working frequency band of an antenna, reflection coefficient information and a current parameter of the impedance matching network, and inputting the working frequency band, the reflection coefficient information and the current parameter of the impedance matching network into an impedance matching model, wherein the reflection coefficient information is used for indicating a reflection coefficient of an incident port of the antenna, the current parameter of the impedance matching network is used for indicating a current impedance value of each element in the impedance matching network of the antenna, the first target parameter of the impedance matching network is used for indicating a target impedance value of each element in the impedance matching network of the antenna, and when the parameter of the impedance matching network of the antenna is the first target parameter, a conduction gain of the antenna at the working frequency band is maximum. That is to say, the first target parameter of the impedance matching network, which enables the antenna to have the maximum conduction gain in the working frequency band, can be output at one time through the impedance matching model in the embodiment of the present application, so that the problem that in the conventional technology, after the impedance value of each element in the impedance matching network is replaced at one time, the impedance value of each element in the impedance matching network is adjusted according to the change of the conduction gain of the antenna until the conduction gain of the antenna is the maximum is solved, and the efficiency and the intelligence for obtaining the first target parameter of the impedance matching network are improved.
In a sixth aspect, there is provided a computer program product comprising: computer program code which, when run by an impedance matching apparatus, causes the impedance matching apparatus to perform the method of the first aspect.
In the embodiment of the application, a first target parameter of an impedance matching network is obtained by obtaining a working frequency band of an antenna, reflection coefficient information and a current parameter of the impedance matching network, and inputting the working frequency band, the reflection coefficient information and the current parameter of the impedance matching network into an impedance matching model, wherein the reflection coefficient information is used for indicating a reflection coefficient of an incident port of the antenna, the current parameter of the impedance matching network is used for indicating a current impedance value of each element in the impedance matching network of the antenna, the first target parameter of the impedance matching network is used for indicating a target impedance value of each element in the impedance matching network of the antenna, and when the parameter of the impedance matching network of the antenna is the first target parameter, a conduction gain of the antenna at the working frequency band is maximum. That is to say, the first target parameter of the impedance matching network, which enables the antenna to have the maximum conduction gain in the working frequency band, can be output at one time through the impedance matching model in the embodiment of the present application, so that the problem that in the conventional technology, after the impedance value of each element in the impedance matching network is replaced at one time, the impedance value of each element in the impedance matching network is adjusted according to the change of the conduction gain of the antenna until the conduction gain of the antenna is the maximum is solved, and the efficiency and the intelligence for obtaining the first target parameter of the impedance matching network are improved.
In a seventh aspect, a computer program product is provided, the computer program product comprising: computer program code which, when run by an impedance matching apparatus, causes the impedance matching apparatus to perform the method of the second aspect.
In the embodiment of the application, a first target parameter of an impedance matching network is obtained by obtaining a working frequency band of an antenna, reflection coefficient information and a current parameter of the impedance matching network, and inputting the working frequency band, the reflection coefficient information and the current parameter of the impedance matching network into an impedance matching model, wherein the reflection coefficient information is used for indicating a reflection coefficient of an incident port of the antenna, the current parameter of the impedance matching network is used for indicating a current impedance value of each element in the impedance matching network of the antenna, the first target parameter of the impedance matching network is used for indicating a target impedance value of each element in the impedance matching network of the antenna, and when the parameter of the impedance matching network of the antenna is the first target parameter, a conduction gain of the antenna at the working frequency band is maximum. That is to say, the first target parameter of the impedance matching network, which enables the antenna to have the maximum conduction gain in the working frequency band, can be output at one time through the impedance matching model in the embodiment of the present application, so that the problem that in the conventional technology, after the impedance value of each element in the impedance matching network is replaced at one time, the impedance value of each element in the impedance matching network is adjusted according to the change of the conduction gain of the antenna until the conduction gain of the antenna is the maximum is solved, and the efficiency and the intelligence for obtaining the first target parameter of the impedance matching network are improved.
Drawings
FIG. 1 is a schematic diagram of an embodiment of impedance tuning;
FIG. 2 is a schematic diagram of the structure of aperture tuning in one embodiment;
FIG. 3 is a schematic diagram of an electronic device according to an embodiment of the present application;
FIG. 4 is a schematic diagram of an application scenario of an impedance matching method according to the present application;
FIG. 5 is a schematic diagram of an application scenario of an impedance matching method according to the present application;
FIG. 6 is a schematic flow chart of an impedance matching method of the present application;
FIG. 7 is a schematic flow chart of another impedance matching method of the present application;
FIG. 8 is a schematic diagram of an impedance matching model according to an embodiment of the present application;
FIG. 9 is a diagram illustrating a first target parameter and a quantization point of an impedance matching network in accordance with an embodiment of the present application;
FIG. 10 is a schematic flow chart of another impedance matching method of the present application;
FIG. 11 is a schematic diagram of an impedance matching model according to another embodiment of the present application;
FIG. 12 is a schematic flow chart of another impedance matching method of the present application;
FIG. 13 is a schematic diagram of an aperture tuning switch in accordance with an embodiment of the present application;
FIG. 14 is a schematic flow chart of another impedance matching method of the present application;
FIG. 15 is a schematic diagram of an impedance network according to an embodiment of the present application;
FIG. 16 is a schematic diagram of an impedance matching apparatus according to an embodiment of the present application;
fig. 17 is a schematic structural diagram of an electronic device in an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be described in detail and clearly with reference to the accompanying drawings. In the description of the embodiments herein, "/" means "or" unless otherwise specified, for example, a/B may mean a or B; the "and/or" in the text is only an association relation describing the association object, and indicates that three relations may exist, for example, a and/or B may indicate: three cases of a alone, a and B both, and B alone exist, and in addition, "a plurality" means two or more than two in the description of the embodiments of the present application.
In the following, the terms "first", "second" are used for descriptive purposes only and are not to be understood as implying or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature, and in the description of embodiments of the application, unless stated otherwise, "plurality" means two or more.
At present, as more and more functions are integrated on the electronic device, the number of electronic devices provided on the electronic device is also more and more. For example, a full-screen function is implemented on a mobile phone, or the mobile phone adopts a multi-camera module, or a tablet computer uses a large battery, or the mobile phone adopts a large-area fingerprint identification function. These functions will result in a higher screen footprint and a narrower bezel for the electronic device. On the one hand, the inside available space of electronic equipment has been taken up to bigger and bigger battery, camera module and fingerprint identification module crowded, and this makes the antenna headroom space in the electronic equipment littleer and more, and antenna size constantly reduces simultaneously, and then leads to antenna efficiency to reduce. On the other hand, the narrower and narrower bezel leads to a smaller and smaller distance between the antenna and the edge of the screen, resulting in further reduction of the antenna efficiency.
In addition, with the development of Long Term Evolution (LTE) and New wireless (5 th Generation Mobile Communication Technology New Radio, 5 GNR) technologies, the LTE employs Carrier Aggregation (CA), and the 5GNR employs Multiple-Input Multiple-Output (MIMO) Technology to achieve higher data rates. Both techniques require multiple antennas to be used simultaneously for signal transmission and reception. Meanwhile, non-cellular communication modules, such as Wireless Fidelity (Wi-Fi), bluetooth, Global Positioning System (GPS), Ultra Wide Band (UWB), etc., also require additional antennas to be deployed on the electronic device. In summary, the number of antennas on the electronic device is increasing, and more antennas are required to be designed in smaller and smaller space, which means further reduction of the size of the antenna and further reduction of the efficiency of the antenna.
In order to combat the antenna efficiency degradation due to antenna size reduction and environmental changes, the antenna needs to be tuned. The electronic device may perform antenna tuning by the following two methods.
Impedance tuning
Illustratively, impedance tuning may be suitable for use in the environment shown in FIG. 1. An impedance matching network is added between a Radio Frequency Front End (RFFE) and an antenna, and the impedance of the antenna is matched with the impedance of the RFFE by changing the impedance value of each element in the impedance matching network, so that the power transmission efficiency between the RFFE and the antenna is optimized. The total radiated power and total isotropic sensitivity may also be improved by matching the impedance of the antenna to the impedance of the radio frequency front end through an impedance matching network. Generally, matching the impedance of the antenna with the impedance of the rf front end by using an impedance matching network requires acquiring impedance information of an antenna load through an impedance detection loop (not shown in the figure), and requires multiple iterations to match the impedance of the antenna with the impedance of the rf front end. It should be understood that the impedance matching network shown in fig. 1 is merely an example, and in other embodiments of the present application, the impedance matching network may include more or less elements than those shown in fig. 1.
Aperture tuning
For example, aperture tuning may be applied to the application environment shown in fig. 2, in which a set of aperture tuning switches is added between the antenna and the ground, and the effective electrical length of the antenna is changed by turning on different switches in the aperture tuning switches to adjust the resonant frequency of the antenna to match the current operating frequency of the electronic device. It should be understood that the aperture tuning switch shown in fig. 2 is merely an example, and in other embodiments of the present application, the aperture tuning switch may include more or fewer switches than those shown in fig. 2.
For ease of understanding, the following description will first describe related terms and concepts to which embodiments of the present application may relate.
(1) Electrically small antenna
In modern mobile terminals, the size of the antenna, especially the size of the low-band antenna, is generally much smaller than half a wavelength, and is called as an "electrically small antenna", and the antenna efficiency of the electrically small antenna is more sensitive to environmental changes such as hand-holding positions and contact materials. The impedance matching method provided by the embodiment of the application can be applied to the electrically small antenna.
(2) Two-port network
A two-port network (two-port network) refers to a circuit having only two external ports, and is also called a two-port network. To facilitate the analysis of complex circuits, the complex circuits are usually regarded as two-port networks, and the performance of the circuits is described by parameters. For example, the transmission characteristics of a two-port network may be described by an S parameter. Wherein the S parameters include S11, S22, S12, and S21.
S11: when port 2 is matched, the reflection coefficient of port 1;
s22: when port 1 is matched, the reflection coefficient of port 2;
s12: when the port 1 is matched, the reverse transmission coefficient from the port 2 to the port 1 is obtained;
s21: when the port 2 is matched, the forward transmission coefficients from the port 1 to the port 2 are obtained;
the technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.
Fig. 3 shows a hardware system suitable for use in the electronic device of the present application.
The electronic device 100 may be a mobile phone, a smart screen, a tablet computer, a wearable electronic device, an in-vehicle electronic device, an Augmented Reality (AR) device, a Virtual Reality (VR) device, a notebook computer, an ultra-mobile personal computer (UMPC), a netbook, a Personal Digital Assistant (PDA), a projector, and the like, and the embodiment of the present application does not limit the specific type of the electronic device 100.
The electronic device 100 may include a processor 110, an external memory interface 120, an internal memory 121, a Universal Serial Bus (USB) interface 130, a charging management module 140, a power management module 141, a battery 142, an antenna 1, an antenna 2, a mobile communication module 150, a wireless communication module 160, an audio module 170, a speaker 170A, a receiver 170B, a microphone 170C, an earphone interface 170D, a sensor module 180, a key 190, a motor 191, an indicator 192, a camera 193, a display screen 194, a Subscriber Identification Module (SIM) card interface 195, and the like. The sensor module 180 may include a pressure sensor 180A, a gyroscope sensor 180B, an air pressure sensor 180C, a magnetic sensor 180D, an acceleration sensor 180E, a distance sensor 180F, a proximity light sensor 180G, a fingerprint sensor 180H, a temperature sensor 180J, a touch sensor 180K, an ambient light sensor 180L, a bone conduction sensor 180M, and the like.
The configuration shown in fig. 3 is not intended to specifically limit the electronic device 100. In other embodiments of the present application, electronic device 100 may include more or fewer components than shown in FIG. 3, or electronic device 100 may include a combination of some of the components shown in FIG. 3, or electronic device 100 may include sub-components of some of the components shown in FIG. 3. The components shown in fig. 3 may be implemented in hardware, software, or a combination of software and hardware.
Wherein the controller may be a neural center and a command center of the electronic device 100. The controller can generate an operation control signal according to the instruction operation code and the timing signal to complete the control of instruction fetching and instruction execution.
A memory may also be provided in processor 110 for storing instructions and data. In some embodiments, the memory in the processor 110 is a cache memory. The memory may hold instructions or data that have just been used or recycled by the processor 110. If the processor 110 needs to reuse the instruction or data, it can be called directly from the memory. Avoiding repeated accesses reduces the latency of the processor 110, thereby increasing the efficiency of the system.
In some embodiments, processor 110 may include one or more interfaces. The interface may include an integrated circuit (I2C) interface, an integrated circuit built-in audio (I2S) interface, a Pulse Code Modulation (PCM) interface, a universal asynchronous receiver/transmitter (UART) interface, a Mobile Industry Processor Interface (MIPI), a general-purpose input/output (GPIO) interface, a Subscriber Identity Module (SIM) interface, and/or a Universal Serial Bus (USB) interface, etc.
The USB interface 130 is an interface conforming to the USB standard specification, and may specifically be a Mini USB interface, a Micro USB interface, a USB Type C interface, or the like. The USB interface 130 may be used to connect a charger to charge the electronic device 100, and may also be used to transmit data between the electronic device 100 and a peripheral device. And the earphone can also be used for connecting an earphone and playing audio through the earphone. The interface may also be used to connect other electronic devices, such as AR devices and the like.
It should be understood that the interface connection relationship between the modules illustrated in the embodiments of the present application is only an illustration, and does not limit the structure of the electronic device 100. In other embodiments of the present application, the electronic device 100 may also adopt different interface connection manners or a combination of multiple interface connection manners in the above embodiments.
The wireless communication function of the electronic device 100 may be implemented by the antenna 1, the antenna 2, the mobile communication module 150, the wireless communication module 160, a modem processor, a baseband processor, and the like.
The antennas 1 and 2 are used for transmitting and receiving electromagnetic wave signals. Each antenna in the electronic device 100 may be used to cover a single or multiple communication bands. Different antennas can also be multiplexed to improve the utilization of the antennas. For example: the antenna 1 may be multiplexed as a diversity antenna of a wireless local area network. In other embodiments, the antenna may be used in conjunction with a tuning switch.
The mobile communication module 150 may provide a solution including 2G/3G/4G/5G wireless communication applied to the electronic device 100. The mobile communication module 150 may include at least one filter, a switch, a power amplifier, a Low Noise Amplifier (LNA), and the like. The mobile communication module 150 may receive the electromagnetic wave from the antenna 1, filter, amplify, etc. the received electromagnetic wave, and transmit the electromagnetic wave to the modem processor for demodulation. The mobile communication module 150 may also amplify the signal modulated by the modem processor, and convert the signal into electromagnetic wave through the antenna 1 to radiate the electromagnetic wave. In some embodiments, at least some of the functional modules of the mobile communication module 150 may be disposed in the processor 110. In some embodiments, at least some of the functional modules of the mobile communication module 150 may be disposed in the same device as at least some of the modules of the processor 110.
The modem processor may include a modulator and a demodulator. The modulator is used for modulating a low-frequency baseband signal to be transmitted into a medium-high frequency signal. The demodulator is used for demodulating the received electromagnetic wave signal into a low-frequency baseband signal. The demodulator then passes the demodulated low frequency baseband signal to a baseband processor for processing. The low frequency baseband signal is processed by the baseband processor and then transferred to the application processor. The application processor outputs a sound signal through an audio device (not limited to the speaker 170A, the receiver 170B, etc.) or displays an image or video through the display screen 194. In some embodiments, the modem processor may be a stand-alone device. In other embodiments, the modem processor may be provided in the same device as the mobile communication module 150 or other functional modules, independent of the processor 110.
The wireless communication module 160 may provide a solution for wireless communication applied to the electronic device 100, including Wireless Local Area Networks (WLANs) (e.g., wireless fidelity (Wi-Fi) networks), bluetooth (bluetooth, BT), Global Navigation Satellite System (GNSS), Frequency Modulation (FM), Near Field Communication (NFC), Infrared (IR), and the like. The wireless communication module 160 may be one or more devices integrating at least one communication processing module. The wireless communication module 160 receives electromagnetic waves via the antenna 2, performs frequency modulation and filtering processing on electromagnetic wave signals, and transmits the processed signals to the processor 110. The wireless communication module 160 may also receive a signal to be transmitted from the processor 110, perform frequency modulation and amplification on the signal, and convert the signal into electromagnetic waves through the antenna 2 to radiate the electromagnetic waves.
In some embodiments, antenna 1 of electronic device 100 is coupled to mobile communication module 150 and antenna 2 is coupled to wireless communication module 160 so that electronic device 100 can communicate with networks and other devices through wireless communication techniques. The wireless communication technology may include global system for mobile communications (GSM), General Packet Radio Service (GPRS), code division multiple access (code division multiple access, CDMA), Wideband Code Division Multiple Access (WCDMA), time-division code division multiple access (time-division code division multiple access, TD-SCDMA), Long Term Evolution (LTE), fifth Generation wireless communication systems (5G, the 5th Generation of wireless communication systems), BT, GNSS, WLAN, NFC, FM, and/or IR technology, etc. The GNSS may include a Global Positioning System (GPS), a global navigation satellite system (GLONASS), a beidou navigation satellite system (BDS), a quasi-zenith satellite system (QZSS), and/or a Satellite Based Augmentation System (SBAS).
The display screen 194 is used to display images, video, and the like. The display screen 194 includes a display panel. The display panel may adopt a Liquid Crystal Display (LCD), an organic light-emitting diode (OLED), an active-matrix organic light-emitting diode (active-matrix organic light-emitting diode, AMOLED), a flexible light-emitting diode (FLED), a miniature, a Micro-oeld, a quantum dot light-emitting diode (QLED), and the like. In some embodiments, the electronic device 100 may include 1 or N display screens 194, N being a positive integer greater than 1.
The electronic device 100 may implement a shooting function through the ISP, the camera 193, the video codec, the GPU, the display 194, the application processor, and the like.
The connection relationship between the modules shown in fig. 3 is only illustrative and does not limit the connection relationship between the modules of the electronic apparatus 100. Alternatively, the modules of the electronic device 100 may also adopt a combination of the connection manners in the above embodiments.
The scheme provided by the embodiment of the application can be applied to the electronic equipment shown in FIG. 3. For example, the solution provided by the embodiment of the present application can be applied to the antenna 1 illustrated in fig. 3 to meet the requirement of miniaturization of electronic devices.
It should be noted that the composition of the electronic device illustrated in fig. 3 is only an example, and does not limit the application environment of the solution provided in the embodiment of the present application. The electronic device may also have other composition, where possible.
The following briefly describes an application scenario of the embodiment of the present application.
In order to improve the reduction of antenna efficiency due to the reduction of antenna size and environmental changes, it is necessary to adjust the impedance of the antenna to match the impedance of the rf front end. Here, as shown in fig. 4, a section from a radio frequency chip (RFIC) to a radio frequency connection holder (RF connector) is referred to as a Radio Frequency Front End (RFFE), which includes a power amplifier, a low noise amplifier, a radio frequency switch, and a coupler. Illustratively, the radio frequency switch may be a single pole, four throw switch. The section from the radio frequency base to the antenna is called the radio frequency antenna circuit, which includes an impedance matching circuit, an aperture tuning switch and an antenna. In addition, the electronic device further comprises a system on chip, an antenna tuning module and an impedance detection module. The embodiment of the application can adjust the impedance of the radio frequency antenna circuit (referred to as the impedance of the antenna for short) to be matched with the impedance of the radio frequency front end through a neural network model (impedance matching model). Generally, the RFFE impedance seen from the radio frequency base is 50 Ω for different frequency bands, and the impedance of the radio frequency antenna circuit seen from the radio frequency base varies with different operating frequencies and different use environments, resulting in the impedance of the radio frequency antenna circuit deviating from 50 Ω. For example, a headrest mobile phone, a hand-held mobile phone, a leather cover covering the exterior of the mobile phone, unfolding and folding of a folding screen of the mobile phone, and the proximity of the mobile phone to different materials all cause the impedance of a radio frequency antenna circuit in the mobile phone to deviate from 50 Ω.
In the embodiment of the application, the electronic device is additionally provided with an impedance detection module and an antenna tuning module, the reflection coefficient Γ in of the coupler is obtained through the impedance detection module, the reflection coefficient Γ in is reported to the antenna tuning module, the antenna tuning module obtains the current working frequency band of the antenna and the current parameters of the impedance matching network, the reflection coefficient, the working frequency band and the current parameters of the impedance matching network are input into an impedance matching model in the antenna tuning module, and the first target parameters of the impedance matching network are output.
It should be understood that the antenna tuning module and the impedance detection module may be two separate modules, as shown in fig. 4, in one possible scenario.
In one possible case, the impedance detection module may also be a sub-module in the antenna tuning module, as shown in fig. 5.
It should be understood that the electronic devices shown in fig. 4 and 5 are only examples and do not constitute a limitation on the structure of the electronic devices provided herein.
The antenna tuning module may also be provided in the modem processor in the system-on-chip, where possible.
It should be understood that the above description is illustrative of the application scenario and does not limit the application scenario of the present application in any way.
The impedance matching method provided by the embodiment of the present application is described in detail below with reference to fig. 6 to 15.
Fig. 6 is a schematic flowchart of an impedance matching method according to an embodiment of the present application, and as shown in fig. 6, the method includes:
s101, obtaining the working frequency band of the antenna, reflection coefficient information and current parameters of an impedance matching network, wherein the reflection coefficient information is used for indicating the reflection coefficient of an incident port of the antenna, and the current parameters of the impedance matching network are used for indicating the current impedance value of each element in the impedance matching network of the antenna.
The working frequency band of the antenna may be a frequency point at which the antenna currently works, or may be a frequency band, which is not limited in the embodiment of the present application. The antenna works in at least one frequency band according to the working mode of the electronic equipment, and works at a specific frequency point according to the current scene of the electronic equipment. Illustratively, the 5G operating standard includes a plurality of 5G frequency bands, such as N41, N78, N79, and the like, wherein the frequency band of N41 is 2496MHz to 2690MHz, the frequency band of N78 is 3300MHz to 3800MHz, and the frequency band of N79 is 4400MHz to 5000 MHz. The operator A occupies the frequency band of 3400MHz to 3500MHz in the frequency band of N79, and the operator B occupies the frequency band of 2515MHz to 2575MHz in the frequency band of N41. When the electronic device uses the service provided by the operator a, the working frequency band of the antenna is one frequency point in the frequency band from 3400MHz to 3500MHz correspondingly. At this time, the working frequency band of the antenna may be determined according to the specific current scene of the electronic device. For example, when the electronic device is in a game scene, data interaction needs to be performed between the network device and the game server, which occupies 3420MHz to 3480MHz, that is, the operating frequency band of the antenna is 3420MHz to 3480 MHz. An antenna tuning module in the electronic device may obtain an operating frequency band of the antenna from a modem processor (modem) in a system on a chip or a radio frequency chip.
The reflection coefficient information may be used to indicate a reflection coefficient of an incident port of the antenna. As can be seen from the description of the application scenario, the portion from the rf socket to the antenna is referred to as the rf antenna circuit, and the incident port of the antenna is referred to as the rf socket. Optionally, there is typically a coupler in front of the rf pad through which the signal is sampled at the antenna input port. The electronic device may calculate data sampled by the coupler to obtain reflection coefficient information.
It should be understood that when the impedance of the rf antenna circuit is not matched to the impedance of the rf front end, a portion of the rf power transmitted by the rf front end to the rf antenna circuit is reflected back, thereby causing a Loss of radiated power, which is referred to as Return Loss (RL). Meanwhile, an impedance matching network in the radio frequency antenna circuit is generally composed of an inductance element and/or a capacitance element, and due to quality factors of the inductance element and the capacitance element, the impedance matching network generally has a corresponding equivalent resistance, and when an electrical signal passes through the impedance matching network, the equivalent resistance consumes part of signal power, so that Loss of radiation power is caused, and the Loss of the part is called Insertion Loss (IL). The more matched the impedance of the radio frequency antenna circuit and the impedance of the radio frequency front end, the smaller the return loss, the higher the efficiency of the antenna, the larger the conduction gain, and simultaneously, the better each other performance of the antenna. The impedance value of each element in the impedance matching network changes, and the impedance of the rf antenna circuit changes accordingly. Therefore, by appropriately adjusting the impedance values of the elements in the impedance matching network, the impedance of the rf antenna circuit can be matched with the impedance of the rf front end.
A plurality of variable capacitances and variable inductances may be included in the impedance matching network, which are controlled by digital circuitry. The values of the individual capacitances or inductances are generally discrete, rather than continuous. For example, the value of the capacitance may be any one of the set {0.5pF, 0.6pF … 5.6.6 pF }, but the value of the capacitance cannot be 0.51 pF.
The current parameter of the impedance matching network may refer to a capacitance value corresponding to each capacitor and/or an inductance value corresponding to each inductor in the impedance matching network at the current time, that is, a capacitance value corresponding to each capacitor and/or an inductance value corresponding to each inductor when the capacitors and inductors in the impedance matching network are not adjusted. The electronic device can obtain the current parameters of the impedance matching network by reading the impedance values of each capacitor and each inductor in the impedance matching network set at the current moment.
S102, inputting the working frequency band, the reflection coefficient information and the current parameters of the impedance matching network into an impedance matching model to obtain first target parameters of the impedance matching network, wherein the first target parameters of the impedance matching network are used for indicating target impedance values of all elements in the impedance matching network of the antenna, and when the parameters of the impedance matching network of the antenna are the first target parameters, the conduction gain of the antenna in the working frequency band is maximum.
The impedance matching model may be a neural network model, and the first target parameter of the impedance matching network, which maximizes the antenna conduction gain, is output in a machine learning manner when the operating frequency band, the reflection coefficient information, and the current parameter of the impedance matching network are input.
In one possible case, the impedance matching model may be a logistic regression neural network model. The logistic regression neural network model can be regarded as a predictor, and prediction values of a plurality of variables, namely impedance values of each capacitor and each inductor in the impedance matching network which enables the antenna conduction gain to be maximum, are predicted in a machine learning mode.
It should be understood that, in the case that the impedance matching model provided in the embodiments of the present application is input with the operating frequency band, the reflection coefficient information, and the current parameter of the impedance matching network, the impedance matching model may output the first target parameter of the impedance matching network at one time when the conduction gain of the antenna in the operating frequency band is the maximum. After the impedance value of each element in the impedance matching network does not need to be replaced once, the impedance value of each element in the impedance matching network is adjusted according to the change of the conduction gain of the antenna until the conduction gain of the antenna meets the requirements of users.
In the embodiment of the application, a first target parameter of an impedance matching network is obtained by obtaining a working frequency band of an antenna, reflection coefficient information and a current parameter of the impedance matching network, and inputting the working frequency band, the reflection coefficient information and the current parameter of the impedance matching network into an impedance matching model, wherein the reflection coefficient information is used for indicating a reflection coefficient of an incident port of the antenna, the current parameter of the impedance matching network is used for indicating a current impedance value of each element in the impedance matching network of the antenna, the first target parameter of the impedance matching network is used for indicating a target impedance value of each element in the impedance matching network of the antenna, and when the parameter of the impedance matching network of the antenna is the first target parameter, a conduction gain of the antenna at the working frequency band is maximum. That is to say, the impedance matching model in the embodiment of the present application may output the first target parameter of the impedance matching network that maximizes the conduction gain of the antenna in the operating frequency band at one time, so as to avoid that, in the conventional technology, after the impedance value of each element in the impedance matching network is replaced once, the impedance value of each element in the impedance matching network is adjusted according to the change of the conduction gain of the antenna until the conduction gain of the antenna is maximized, thereby improving the efficiency and the intelligence for obtaining the first target parameter of the impedance matching network.
In one possible case, after the first target parameter of the impedance matching network is obtained, the parameter of the impedance matching network of the antenna may be further configured according to the first target parameter of the impedance matching network.
Optionally, on the basis of the embodiment shown in fig. 6, as shown in fig. 7, there is provided an impedance matching method, including:
s101, obtaining the working frequency band of the antenna, reflection coefficient information and current parameters of an impedance matching network, wherein the reflection coefficient information is used for indicating the reflection coefficient of an incident port of the antenna, and the current parameters of the impedance matching network are used for indicating the current impedance value of each element in the impedance matching network of the antenna.
S102, inputting the working frequency band, the reflection coefficient information and the current parameters of the impedance matching network into an impedance matching model to obtain first target parameters of the impedance matching network, wherein the first target parameters of the impedance matching network are used for indicating target impedance values of all elements in the impedance matching network of the antenna, and when the parameters of the impedance matching network of the antenna are the first target parameters, the conduction gain of the antenna in the working frequency band is maximum.
For example, as shown in fig. 8, the impedance matching model may use the operating frequency band, the reflection coefficient information, and the current parameter of the impedance matching network as inputs of the impedance matching model, and perform machine learning on the operating frequency band, the reflection coefficient information, and the current parameter of the impedance matching network through neurons in the impedance matching model to output the first target parameter of the impedance matching network.
S103, configuring parameters of the impedance matching network of the antenna according to the first target parameters of the impedance matching network.
It should be understood that the first target parameter of the impedance matching network output by the impedance matching model is a set of impedance values of each capacitor and inductor in the impedance matching network. The impedance value is not influenced by the value ranges of the capacitance and the inductance, and can be any impedance value. For example, the value range of the a capacitance in the impedance matching network is set {0.5pF, 0.6pF … 5.6.6 pF }, and the value of the a capacitance obtained according to the impedance matching model is 0.53 pF. In this case, the electronic device cannot set the value of the a capacitance to 0.53pF, and can only set 0.5pF closest to 0.53pF as the value of the a capacitance.
Noting a first target parameter of the impedance matching network
That is to say that,
the values of the elements in the impedance matching network are indicated. The first target parameter due to the impedance matching network may not be a legal value for each of the capacitance and inductance. Thus, can be used for
Performing quantization to obtain
The corresponding quantization point. Illustratively, as shown in FIG. 9,
the impedance values of part of capacitors and inductors are not legal values of all capacitors and inductors in the impedance matching network, and the electronic equipment cannot assign all elements in the impedance matching network to values
Indicated impedance values, therefore, can be selected and compared in FIG. 9
As the closest crossing point of Euclidean distance
Corresponding quantization points, and assigning each element in the impedance matching network to an impedance value indicated by the quantization point. Each intersection in fig. 9 corresponds to a legal combination of the capacitance and inductance in the impedance matching network.
In the embodiment of the application, the first target parameter of the impedance matching network is obtained by obtaining the working frequency band of the antenna, the reflection coefficient information and the current parameter of the impedance matching network, and inputting the working frequency band, the reflection coefficient information and the current parameter of the impedance matching network into the impedance matching model, and then the parameter of the impedance matching network of the antenna is configured according to the first target parameter of the impedance matching network. The reflection coefficient information is used for indicating the reflection coefficient of an incident port of the antenna, the current parameter of the impedance matching network is used for indicating the current impedance value of each element in the impedance matching network of the antenna, the first target parameter of the impedance matching network is used for indicating the target impedance value of each element in the impedance matching network of the antenna, and when the parameter of the impedance matching network of the antenna is the first target parameter, the conduction gain of the antenna in the working frequency band is the maximum. After the first target parameter of the impedance matching network is obtained according to the impedance matching model, the impedance value of each element in the impedance matching network indicated by the first target parameter is properly adjusted according to the first target parameter of the impedance matching network, and then the impedance value of each element of the impedance matching network is configured, so that the situation that the impedance value of each element of the impedance matching network cannot be adjusted under the condition that the first target parameter of the impedance matching network is an illegal value of each element of the impedance matching network of the antenna is avoided, and the applicability of the first target parameter of the impedance matching network obtained from the impedance matching model is improved.
In one possible case, the impedance matching model outputs the conducted gain of the antenna based on the first target parameter of the output impedance matching network. This is described in detail below by means of the embodiment shown in fig. 10 to 15.
Fig. 10 is a schematic flowchart of an impedance matching method provided in another embodiment of the present application, as shown in fig. 10, the method includes:
s201, obtaining the working frequency band of the antenna and the current parameters of the impedance matching network.
S202, acquiring incident voltage and reflected voltage of a coupler connected with an antenna incident port, and acquiring reflection coefficient information according to the incident voltage and the reflected voltage.
It should be understood that the impedance detection module can obtain the incident voltage and the reflected voltage of the coupler in front of the RF seat, and further, the incident voltage and the reflected voltageThe amplitude and the phase of the coupler are measured and quantized, and the reflection coefficient Γ in of the coupler is obtained through calculation. Then, the reflection coefficient gamma of the antenna incident port is obtained according to the corresponding relation between the reflection coefficient of the antenna incident port and the reflection coefficient of the couplerL。
For example, the corresponding relationship between the reflection coefficient of the antenna incident port and the reflection coefficient of the coupler may be as shown in formula (1), and when the reflection coefficient Γ in of the coupler is obtained, the reflection coefficient Γ in of the antenna incident port may be obtained by inverse-deducing according to formula (1)L。
Wherein, gamma isLRepresenting the reflection coefficient of the antenna incident port. S11, S12, S21, and S22 refer to S parameters of the two-port network of the rf antenna circuit. The S parameter of the two-port network of the radio frequency antenna circuit can be measured and obtained through the impedance detection module.
In the embodiment of the application, the reflection coefficient information is obtained by the impedance detection module obtaining the incident voltage and the reflection voltage of the coupler connected with the antenna incident port and calculating according to the incident voltage and the reflection voltage. That is to say, the reflection coefficient information can be obtained by acquiring the incident voltage and the reflection voltage of the coupler through the impedance detection module, so that the convenience of acquiring the reflection coefficient information is improved.
S203, inputting the working frequency band, the reflection coefficient information and the current parameters of the impedance matching network into the impedance matching model to obtain a first target parameter of the impedance matching network and a conduction gain predicted value, wherein the conduction gain predicted value is used for representing the conduction gain of the antenna when the parameters of the impedance matching network are the first target parameter.
Illustratively, the impedance matching model may be as shown in fig. 11. And inputting the working frequency band, the reflection coefficient information and the current parameter of the impedance matching network into an impedance matching model, wherein the impedance matching model can simultaneously output a first target parameter and a conduction gain predicted value of the impedance matching network. When the parameter of the impedance matching network of the antenna is the first target parameter, the conduction gain of the antenna in the working frequency band is the maximum. That is, the predicted conduction gain value refers to the maximum conduction gain of the antenna in the operating frequency band.
It will be appreciated that the more the impedance of the rf front end is matched to the impedance of the rf antenna circuit, the higher the conduction gain of the antenna.
When the impedance detection module acquires the reflection coefficient information, the impedance detection module can also acquire the S parameter of the radio frequency antenna circuit. Based on this, a conduction gain prediction value is obtained according to equation (2).
Wherein, gamma isSExpressed as the reflection coefficient of the radio frequency front end, determined by the performance of the power amplifier; gamma-shapedLDenotes the reflection coefficient of the antenna incident port and Γ in denotes the reflection coefficient of the coupler. S11, S12, S21, and S22 refer to S parameters of the two-port network of the rf antenna circuit. The S parameter of the two-port network of the radio frequency antenna circuit can be measured and obtained through the impedance detection module.
It should be understood that the parameters of the impedance matching network change, and the reflection coefficient of the antenna incident port also changes, where Γ in equation (2)LAnd under the condition that the parameter representing the impedance matching network is the first target parameter, the reflection coefficient of the antenna incident port.
In the embodiment of the application, the working frequency band, the reflection coefficient information and the current parameter of the impedance matching network are input into the impedance matching model to obtain the first target parameter and the predicted conduction gain value of the impedance matching network, wherein the larger the predicted conduction gain value is, the more matched the impedance of the radio-frequency antenna circuit and the impedance of the radio-frequency front end is. Under a possible condition, whether the output first target parameter of the impedance matching network is accurate or not can be determined according to the conduction gain predicted value, and therefore the accuracy of inputting the working frequency band, the reflection coefficient information and the current parameter of the impedance matching network into the impedance matching model to obtain the first target parameter of the impedance matching network is improved.
And S204, obtaining the difference value between the conduction gain prediction value and the current conduction gain of the antenna.
The current conduction gain refers to the conduction gain of the antenna when the parameter of the impedance matching network of the antenna is the current parameter.
And S205, determining whether the difference value is smaller than or equal to a first preset threshold value. If yes, go to S206. If not, go to step S207.
Since the values of the elements in the impedance matching network are discrete, after the impedance matching model outputs the first target parameter of the impedance matching network, the electronic device cannot assign the elements in the impedance matching network to values in a possible case
Indicated impedance value. Thus, the method can be selected from FIG. 9
The closest crossing point of Euclidean distance is used as
Corresponding quantization points, and assigning each element in the impedance matching network to an impedance value indicated by the quantization point.
That is, the actual assignments to the elements in the impedance matching network are not necessarily the first target parameters of the impedance matching network. Accordingly, the actual conduction gain of the antenna is not necessarily the maximum conduction gain. In this case, if the current parameter of the impedance matching network is denoted as the a state, the first target parameter of the impedance matching network is denoted as the C state. In a possible case, the state of the impedance matching network obtained according to the reflection coefficient information and the working frequency band of the antenna in the a state is the C state. And in the C state, the state of the impedance matching network obtained according to the reflection coefficient information and the working frequency band of the antenna is the A state. This is equivalent to the impedance matching network having ping-pong switching.
Based on this, a threshold value (a first preset threshold value) may be set, and the state a is switched to the state C only when the difference between the conduction gain prediction value corresponding to the state C and the conduction gain (current conduction gain) of the state a is greater than the threshold value.
S206, keeping the impedance value of each element in the impedance matching network of the antenna unchanged.
In the embodiment of the application, the working frequency band, the reflection coefficient information and the current parameter of the impedance matching network are input into the impedance matching model to obtain the first target parameter and the conduction gain predicted value of the impedance matching network, and the difference value between the conduction gain predicted value and the current conduction gain of the antenna is obtained, so that the current parameter of the impedance matching network is kept unchanged under the condition that the difference value is smaller than or equal to the first preset threshold value. Therefore, the condition that the ping-pong switching of the impedance matching network is caused by the small difference between the predicted value of the conduction gain and the current conduction gain can be effectively avoided.
Optionally, the impedance value of each element in the impedance matching network of the antenna is kept unchanged for a preset time period.
In one possible scenario, the electronic device may start a timer upon determining that a difference between the predicted conduction gain value and the current conduction gain of the antenna is less than or equal to a first preset threshold, and maintain the impedance values of the elements in the impedance matching network unchanged until the timer reaches a specified time.
And S207, configuring parameters of the impedance matching network of the antenna according to the first target parameters of the impedance matching network.
Generally, when the electronic device is in a state of transmitting power, the probability of impedance mismatch between the rf antenna circuit and the rf front end is high, and therefore before the working frequency band of the antenna and the current parameters of the impedance matching network are obtained, it may be determined whether the electronic device is in the state of transmitting power. This is explained in detail below with reference to fig. 12.
Fig. 12 is a schematic flowchart of an impedance matching method according to another embodiment of the present application, as shown in fig. 12, the method includes:
s301, determining whether a transmitting port of the antenna is opened. If yes, go to step S302. If not, go to S303.
Before obtaining the working frequency band, the reflection coefficient information and the current parameters of the impedance matching network, it may also be determined whether the transmitting port of the antenna is opened. Under the condition that a transmitting port of the antenna is not opened, the impedance detection module cannot acquire reflection coefficient information, and further cannot input the working frequency band, the reflection coefficient information and the current parameters of the impedance matching network into the impedance matching model to obtain the first target parameters of the impedance matching network. Therefore, under the condition that the transmitting port of the antenna is not opened, the preset parameters of the impedance matching network can be directly determined according to the current scene information of the electronic equipment.
In the embodiment of the application, before the working frequency band, the reflection coefficient information and the current parameter of the impedance matching network are obtained, whether a transmitting port of the antenna is opened or not may be determined, under the condition that the transmitting port is not opened, the reflection coefficient information cannot be obtained by the impedance detection module, the preset parameter of the impedance matching network corresponding to the scene information may be determined according to the corresponding relationship between the scene information and the parameter of the impedance matching network, that is, under the condition that the reflection coefficient information cannot be obtained due to the condition that the transmitting port of the antenna is not opened, the preset parameter of the impedance matching network corresponding to the scene information may be determined according to the corresponding relationship between the scene information and the parameter of the impedance matching network, and the condition that the first target parameter of the impedance matching network cannot be determined is avoided.
S302, determining whether the transmitting power of the antenna is larger than a second preset threshold value. If yes, go to step S304. If not, go to S303.
In the case that the transmitting port of the antenna is opened, it may be further determined whether the transmitting power of the antenna is greater than a second preset threshold. When the transmitting power of the antenna is smaller than or equal to the second preset threshold, the impedance detection module also cannot acquire the reflection coefficient information, and further cannot input the working frequency band, the reflection coefficient information and the current parameters of the impedance matching network into the impedance matching model to obtain the first target parameters of the impedance matching network. Therefore, when the transmitting power of the antenna is less than or equal to the second preset threshold, the preset parameters of the impedance matching network can be directly determined according to the current scene information of the electronic device.
It should be understood that the second preset threshold may be a threshold determined according to user experience, or may be a threshold determined by a machine learning method, which is not limited in this embodiment of the application.
In the embodiment of the application, before obtaining the operating frequency band, the reflection coefficient information, and the current parameter of the impedance matching network, it may be further determined whether a transmission port of the antenna is opened, and in a case that the transmission port is opened, it is further determined whether the transmission power is greater than a second preset threshold, in a case that the transmission power is less than or equal to the second preset threshold, on the basis that the transmission port is opened, and in a case that the transmission power is less than or equal to the second preset threshold, the impedance detection module may still not obtain the reflection coefficient information, and may determine the preset parameter of the impedance matching network corresponding to the context information according to a correspondence between the context information and the parameter of the impedance matching network, that is, the transmission port of the antenna is opened, but in a case that the transmission power is less than or equal to the second preset threshold, according to a correspondence between the context information and the parameter of the impedance matching network, the preset parameters of the impedance matching network corresponding to the scene information are determined, and the condition that the first target parameters of the impedance matching network cannot be determined is avoided.
And S303, determining preset parameters of the impedance matching network corresponding to the scene information according to the corresponding relation between the scene information and the parameters of the impedance matching network.
Illustratively, the correspondence between the scene information and the parameters of the impedance matching network may be as shown in table 1, where hall state 0 refers to the folding screen mobile phone being folded, and hall state 1 refers to the folding screen mobile phone being unfolded. C0, C1, C2 … and C7 respectively correspond to the impedance values of the elements in the impedance matching network. It should be understood that the correspondence between the scenario information and the parameters of the impedance matching network listed in table 1 is only an example, and does not constitute a limitation on the correspondence between the scenario information and the parameters of the impedance matching network in the embodiment of the present application.
TABLE 1
In the embodiment of the application, under the condition that the sending port of the antenna is not opened, or the sending port of the antenna is opened, but the transmitting power of the antenna is less than or equal to the second preset threshold, the preset parameter of the impedance matching network corresponding to the scene information can be directly determined according to the corresponding relation between the scene information and the parameter of the impedance matching network, so that the convenience of determining the parameter of the impedance matching network is improved.
S304, obtaining the working frequency band, the reflection coefficient information, the current opening state of each switch in the aperture tuning switch and the current parameters of the impedance matching network.
It should be understood that the aperture tuning switch typically includes a plurality of switches, and the electrical length of the antenna is adjusted by controlling the conduction state of each switch.
Illustratively, as shown in fig. 13, the aperture tuning switch includes 3 switches, the switch 1 is connected to the reference ground through an inductor, the switch 2 is connected to the reference ground through a capacitor, and the switch 3 is directly connected to the reference ground. When the switch 1 is turned on, the switch 2 and the switch 3 are turned off, which is equivalent to connecting an inductor to the antenna, and reducing the equivalent electrical length of the antenna. When the switch 2 is turned on, the switch 1 and the switch 3 are turned off, which is equivalent to connecting a capacitor in series on the antenna, and increasing the equivalent electrical length of the antenna. When switch 3 is on, switch 1 and switch 2 are off, corresponding to the antenna being directly connected to the reference ground, so that the equivalent electrical length of the antenna is unchanged. Changes in the electrical length of the antenna can affect the S-parameter and reflection coefficient information of the two-port network of the rf antenna circuit.
In the embodiment of the application, under the condition that the current on state of each switch in the aperture tuning switch is fixed, the working frequency band, the reflection coefficient information and the current parameters of the impedance matching network are input into the impedance matching model, so that the first target parameters and the predicted conduction gain values of the impedance matching network can be obtained. In a possible case, the current on state of each switch in the aperture tuning switch may also be used as a parameter of the input impedance matching model, and the first target parameter and the predicted conduction gain value of the impedance matching network may be obtained based on the operating frequency band, the reflection coefficient information, the current on state of each switch in the aperture tuning switch, and the current parameter of the impedance matching network.
S305, inputting the working frequency band, the reflection coefficient information, the current opening state of each switch in the aperture tuning switch and the current parameters of the impedance matching network into the impedance matching model to obtain the first target parameters and the conduction gain predicted value of the impedance matching network.
In the embodiment of the application, the first target parameter and the predicted value of the conduction gain of the impedance matching network are obtained by obtaining the working frequency band, the reflection coefficient information, the current on state of each switch in the aperture tuning switch and the current parameter of the impedance matching network, and inputting the working frequency band, the reflection coefficient information, the current on state of each switch in the aperture tuning switch and the current parameter of the impedance matching network into the impedance matching model, so that in the process of obtaining the first target parameter and the predicted value of the conduction gain of the impedance matching network, the machine learning of the current on state of each switch in the aperture tuning switch is increased, namely the influence of the current on state of each switch in the aperture tuning switch on the first target parameter of the impedance matching network is taken as a judgment condition, so that the impedance matching model simulates the state closer to the actual radio frequency antenna circuit, the accuracy of the first target parameter and the predicted value of the conduction gain of the obtained impedance matching network is improved.
The impedance matching model may be a trained neural network model.
Illustratively, the impedance matching model may be trained by the method steps shown in FIG. 14. As shown in fig. 14, includes:
s401, sample data is obtained, wherein the sample data comprises a sample working frequency band, sample reflection coefficient information and sample parameters of a matching network.
In the process of obtaining sample data, different impedance networks can be externally connected to the radio frequency antenna circuit to simulate the impedance of the radio frequency antenna circuit in different use environments. For example, the impedance of the rf antenna circuit when the headrest phone is simulated by externally connecting an impedance network as shown in fig. 15. An impedance network generally refers to a two-port network formed by a capacitor, an inductor, and a resistor.
After the radio frequency antenna circuit is externally connected with different impedance networks, the S parameters of the radio frequency antenna circuit and the reflection information of the coupler corresponding to the externally connected different impedance networks are obtained, namely the S parameters of the radio frequency antenna circuit and the reflection information of the coupler under different use environments.
The capacitance in the impedance matching network is usually a variable capacitance, and the inductance is usually a variable inductance, that is, the capacitance and the inductance in the impedance matching network are programmable elements, and the impedance value thereof can be controlled by a digital circuit. Illustratively, a variable capacitor in the impedance matching network is controlled by 5-bit digital logic, and the capacitor may comprise 25=32 assignments.
Through controlling each element in the impedance matching network, the parameters of the impedance matching network can be changed, the parameters of different impedance matching networks are scanned, and S parameters of the radio frequency antenna circuit and the reflection coefficient of the coupler corresponding to the parameters of different impedance matching networks can be obtained.
In one possible case, the sample data further includes current on-states of switches in the aperture tuning switches.
Scanning the different opening states of the switches in the aperture tuning switch can obtain the S parameters of the radio frequency antenna circuit and the reflection coefficient of the coupler corresponding to the different opening states of the switches in the aperture tuning switch.
After the S-parameters of the rf antenna circuit and the reflection coefficients of the coupler in different states are obtained, the conduction gains corresponding to the different states can be calculated according to the formula (2).
For example, the obtained operating frequency band, the current on state of each switch in the aperture tuning switch, the current parameters of the impedance matching network, the S-parameters, the reflection coefficient of the coupler, and the calculated conduction gain may be as shown in table 2.
After the data shown in table 2 is obtained, a group of data with the maximum calculated conduction gain may be selected from a group of data sets with the same frequency point and the same aperture tuning switch state as sample data. For example, as shown in table 2, taking a data set with a frequency point of B1-sub0 and an opening state of each switch in an aperture tuning switch of a0 as an example, the data set includes two sets of data, i.e., current parameters of an impedance matching network of C0 and C1, where the current parameter of the impedance matching network is that the conduction gain corresponding to C0 is 0.7, and the current parameter of the impedance matching network is that the conduction gain corresponding to C1 is 0.75. Therefore, the predicted value of the conduction gain is 0.75, and the first target parameter of the impedance matching network is C1, which is used as a training label with a sub-frequency point of B1-sub0 and an opening state of each switch in the aperture tuning switch of a 0. Deleting and selecting the opening state of each switch in different sub-frequency points and aperture tuning switches to obtain a sample data set shown in table 3.
S402, training the impedance matching model by taking the sample data as input data and taking a second target parameter as target output data to obtain the trained impedance matching model, wherein the second target parameter is a parameter of a matching network which enables the conduction gain of the antenna to be maximum when the antenna works in a sample working frequency band.
In the embodiment of the application, the impedance matching model takes the sample data as input data and takes the second target parameter as target output data, and the neural network model is obtained by training, so that the first target parameter and the conduction gain predicted value of the impedance matching network obtained by the impedance matching model are more accurate.
S306, obtaining the difference value between the conduction gain prediction value and the current conduction gain of the antenna.
And S307, determining whether the difference is smaller than or equal to a first preset threshold value. If yes, go to step S308. If not, go to S309.
And S308, keeping the impedance value of each element in the impedance matching network of the antenna unchanged.
S309, configuring parameters of the impedance matching network of the antenna according to the first target parameters of the impedance matching network.
The methods shown in fig. 6 to 15 may be applied to the electronic device shown in fig. 4 or fig. 5, where the electronic device includes a radio frequency front end circuit, a radio frequency antenna circuit, an antenna tuning module, and an impedance detection module, the radio frequency antenna circuit includes an antenna, an impedance matching network, and an aperture tuning switch, the antenna is connected to the impedance matching network and the aperture tuning switch, respectively, the impedance detection module is connected to the antenna tuning module, and the antenna tuning module includes an impedance matching model. The impedance detection module acquires reflection coefficient information, and the antenna tuning module acquires the working frequency band of the antenna and the current parameters of the matching network.
In one embodiment, the rf front-end circuit in the electronic device further includes a coupler, the coupler is respectively connected to the impedance detection module and the impedance matching network, and the impedance detection module obtains the reflection coefficient information.
It should be understood that, although the respective steps in the flowcharts in the above-described embodiments are sequentially shown as indicated by arrows, the steps are not necessarily performed sequentially as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least a portion of the steps in the flowchart may include multiple sub-steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, and the order of performing the sub-steps or stages is not necessarily sequential, but may be performed alternately or alternately with other steps or at least a portion of the sub-steps or stages of other steps.
It will be appreciated that, in order to implement the above-described functions, the electronic device includes corresponding hardware and/or software modules that perform the respective functions. The present application can be realized in hardware or a combination of hardware and computer software in connection with the exemplary algorithm steps described in connection with the embodiments disclosed herein. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, with the embodiment described in connection with the particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiment of the present application, the electronic device may be divided into the functional modules according to the method example, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one module. It should be noted that, in the embodiment of the present application, the division of the module is schematic, and is only one logic function division, and there may be another division manner in actual implementation. It should be noted that the names of the modules in the embodiments of the present application are illustrative, and the names of the modules are not limited in actual implementation.
Fig. 16 is a schematic structural diagram of an impedance matching apparatus according to an embodiment of the present application.
It is to be understood that the impedance matching apparatus 600 may perform the impedance matching method shown in fig. 6 to 15; the impedance matching device 600 includes: an acquisition unit 610 and a processing unit 620.
In an embodiment, the obtaining unit 610 is configured to obtain an operating frequency band of the antenna, reflection coefficient information, and a current parameter of an impedance matching network, where the reflection coefficient information is used to indicate a reflection coefficient of an incident port of the antenna, and the current parameter of the impedance matching network is used to indicate a current impedance value of each element in the impedance matching network of the antenna;
the processing unit 620 is configured to input the operating frequency band, the reflection coefficient information, and the current parameter of the impedance matching network into the impedance matching model, so as to obtain a first target parameter of the impedance matching network, where the first target parameter of the impedance matching network is used to indicate a target impedance value of each element in the impedance matching network of the antenna, and when the parameter of the impedance matching network of the antenna is the first target parameter, the conduction gain of the antenna in the operating frequency band is maximum.
In one embodiment, the processing unit 620 is configured to configure parameters of an impedance matching network of the antenna according to a first target parameter of the impedance matching network.
In one embodiment, the processing unit 620 is configured to input the operating frequency band, the reflection coefficient information, and the current parameter of the impedance matching network into the impedance matching model, so as to obtain a first target parameter of the impedance matching network and a predicted conduction gain value, where the predicted conduction gain value is used to indicate a conduction gain of the antenna when the parameter of the impedance matching network is the first target parameter.
In one embodiment, the obtaining unit 610 is configured to obtain a difference between the conduction gain prediction value and a current conduction gain of the antenna; the current conduction gain refers to the conduction gain of the antenna when the parameters of the impedance matching network of the antenna are the current parameters;
the processing unit 620 is configured to configure a parameter of an impedance matching network of the antenna as a first target parameter if the difference is greater than a first preset threshold.
In one embodiment, the obtaining unit 610 is configured to obtain a difference between a conduction gain prediction value and a current conduction gain of the antenna, where the current conduction gain refers to a conduction gain of the antenna when a parameter of an impedance matching network of the antenna is a current parameter, and the conduction gain prediction value refers to a conduction gain of the antenna when the parameter of the impedance matching network is a first target parameter;
the processing unit 620 is configured to keep the impedance value of each element in the impedance matching network of the antenna unchanged when the difference is smaller than or equal to the first preset threshold.
In one embodiment, the processing unit 620 is configured to keep the impedance values of the elements in the impedance matching network of the antenna constant for a preset time period.
In one embodiment, the obtaining unit 610 is configured to obtain an incident voltage and a reflected voltage of a coupler connected to an incident port of an antenna; and obtaining reflection coefficient information according to the incident voltage and the reflection voltage.
In one embodiment, the processing unit 620 is configured to determine whether a transmission port of the antenna is open; determining whether the transmitting power of the antenna is greater than a second preset threshold value or not under the condition that the transmitting port is opened;
the obtaining unit 610 is configured to obtain the working frequency band, the reflection coefficient information, and the current parameter of the impedance matching network when the transmission power is greater than a second preset threshold.
In one embodiment, the obtaining unit 610 is configured to obtain current scene information of an antenna when a transmission port of the antenna is not opened; or, acquiring current scene information of the antenna under the condition that the transmitting power is less than or equal to a second preset threshold;
the processing unit 620 is configured to determine a preset parameter of the impedance matching network corresponding to the scene information according to a correspondence between the scene information and a parameter of the impedance matching network.
In one embodiment, the obtaining unit 610 is configured to obtain sample data, where the sample data includes a sample operating frequency band, sample reflection coefficient information, and a sample parameter of a matching network;
the processing unit 620 is configured to train the impedance matching model by using the sample data as input data and using a second target parameter as target output data, to obtain a trained impedance matching model, where the second target parameter is a parameter of a matching network that maximizes a conduction gain of an antenna when the antenna operates in a sample operating frequency band.
In one embodiment, the obtaining unit 610 is configured to obtain a current on state of each switch in an aperture tuning switch of an antenna, where the aperture tuning switch is configured to adjust an electrical length of the antenna;
the processing unit 620 is configured to input the operating frequency band, the reflection coefficient information, the current on state of each switch, and the current parameter of the impedance matching network into the impedance matching model, so as to obtain a first target parameter of the impedance matching network.
The impedance matching device provided in this embodiment is used for implementing the impedance matching method of the above embodiments, and the technical principle and the technical effect are similar, and are not described herein again.
The impedance matching apparatus 600 is embodied as a functional unit. The term "unit" herein may be implemented in software and/or hardware, and is not particularly limited thereto.
For example, a "unit" may be a software program, a hardware circuit, or a combination of both that implement the above-described functions. The hardware circuitry may include an Application Specific Integrated Circuit (ASIC), an electronic circuit, a processor (e.g., a shared processor, a dedicated processor, or a group of processors) and memory that execute one or more software or firmware programs, a combinational logic circuit, and/or other suitable components that support the described functionality.
Accordingly, the units of the respective examples described in the embodiments of the present application can be realized in electronic hardware, or a combination of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
Fig. 17 shows a schematic structural diagram of an electronic device provided in the present application. The dashed lines in fig. 17 indicate that the unit or the module is optional. The electronic device 700 may be used to implement the impedance matching method described in the method embodiments above.
The electronic device 700 includes one or more processors 701, and the one or more processors 701 may support the electronic device 700 to implement the impedance matching method in the method embodiments. The processor 701 may be a general purpose processor or a special purpose processor. For example, the processor 701 may be a Central Processing Unit (CPU), a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA), or other programmable logic device, such as a discrete gate, a transistor logic device, or a discrete hardware component.
The processor 701 may be used to control the electronic device 700, execute software programs, and process data of the software programs. The electronic device 700 may further include a communication unit 705 to enable input (reception) and output (transmission) of signals.
For example, the electronic device 700 may be a chip and the communication unit 705 may be an input and/or output circuit of the chip, or the communication unit 705 may be a communication interface of the chip, and the chip may be a component of a terminal device or other electronic devices.
Also for example, the electronic device 700 may be a terminal device and the communication unit 705 may be a transceiver of the terminal device, or the communication unit 705 may be a transceiver circuit of the terminal device.
The electronic device 700 may include one or more memories 702, on which programs 704 are stored, and the programs 704 may be executed by the processor 701 to generate instructions 703, so that the processor 701 executes the impedance matching method described in the above method embodiment according to the instructions 703.
Optionally, data may also be stored in the memory 702. Alternatively, the processor 701 may also read data stored in the memory 702, the data may be stored at the same memory address as the program 704, or the data may be stored at a different memory address from the program 704.
The processor 701 and the memory 702 may be provided separately or integrated together; for example, on a System On Chip (SOC) of the terminal device.
Illustratively, the memory 702 may be configured to store a program 704 related to an impedance matching method provided in the embodiment of the present application, and the processor 701 may be configured to call the program 704 related to the impedance matching method stored in the memory 702 when performing image restoration on the terminal device, and execute the impedance matching method of the embodiment of the present application; the method comprises the following steps: the method comprises the steps of obtaining the working frequency band of an antenna, reflection coefficient information and current parameters of an impedance matching network, wherein the reflection coefficient information is used for indicating the reflection coefficient of an incident port of the antenna, and the current parameters of the impedance matching network are used for indicating the current impedance value of each element in the impedance matching network of the antenna; and inputting the working frequency band, the reflection coefficient information and the current parameters of the impedance matching network into an impedance matching model to obtain first target parameters of the impedance matching network, wherein the first target parameters of the impedance matching network are used for indicating target impedance values of all elements in the impedance matching network of the antenna, and when the parameters of the impedance matching network of the antenna are the first target parameters, the conduction gain of the antenna in the working frequency band is the maximum.
The present application further provides a computer program product, which when executed by the processor 701 implements the impedance matching method according to any of the method embodiments of the present application.
The computer program product may be stored in the memory 702, for example, as the program 704, and the program 704 is finally converted into an executable object file capable of being executed by the processor 701 through preprocessing, compiling, assembling, linking and the like.
The present application also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a computer, implements the impedance matching method according to any of the method embodiments of the present application. The computer program may be a high-level language program or an executable object program.
Such as memory 702. Memory 702 may be either volatile memory or nonvolatile memory, or memory 702 may include both volatile and nonvolatile memory. The non-volatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an electrically Erasable EPROM (EEPROM), or a flash memory. Volatile memory can be Random Access Memory (RAM), which acts as external cache memory. By way of example, but not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic Random Access Memory (SDRAM), double data rate SDRAM, enhanced SDRAM, SLDRAM, Synchronous Link DRAM (SLDRAM), and direct rambus RAM (DR RAM).
In the present application, "at least one" means one or more, "a plurality" means two or more. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or multiple.
It should be understood that, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not imply any order of execution, and the order of execution of the processes should be determined by their functions and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative; for example, the division of the unit is only a logic function division, and there may be another division manner in actual implementation; for example, multiple units or components may be combined or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (21)
1. An impedance matching method, comprising:
the method comprises the steps of obtaining a working frequency band of an antenna, reflection coefficient information and current parameters of an impedance matching network, wherein the reflection coefficient information is used for indicating the reflection coefficient of an incident port of the antenna, and the current parameters of the impedance matching network are used for indicating the current impedance value of each element in the impedance matching network of the antenna;
and inputting the working frequency band, the reflection coefficient information and the current parameters of the impedance matching network into an impedance matching model to obtain first target parameters of the impedance matching network, wherein the first target parameters of the impedance matching network are used for indicating target impedance values of all elements in the impedance matching network of the antenna, and when the parameters of the impedance matching network of the antenna are the first target parameters, the conduction gain of the antenna in the working frequency band is maximum.
2. The method of claim 1, further comprising:
configuring parameters of an impedance matching network of the antenna according to first target parameters of the impedance matching network.
3. The method of claim 2, wherein the inputting the operating frequency band, the reflection coefficient information, and the current parameter of the impedance matching network into an impedance matching model to obtain a first target parameter of the impedance matching network comprises:
and inputting the working frequency band, the reflection coefficient information and the current parameter of the impedance matching network into the impedance matching model to obtain a first target parameter and a conduction gain predicted value of the impedance matching network, wherein the conduction gain predicted value is used for representing the conduction gain of the antenna when the parameter of the impedance matching network is the first target parameter.
4. The method of claim 3, further comprising:
obtaining a difference value between the conduction gain prediction value and the current conduction gain of the antenna; the current conduction gain refers to the conduction gain of the antenna when the parameter of the impedance matching network of the antenna is the current parameter;
the adjusting parameters of the impedance matching network of the antenna according to the first target parameters of the impedance matching network comprises:
and configuring the parameters of the impedance matching network of the antenna as the first target parameters under the condition that the difference value is larger than a first preset threshold value.
5. The method of claim 1, further comprising:
obtaining a difference value between a conduction gain prediction value and a current conduction gain of the antenna, wherein the current conduction gain refers to the conduction gain of the antenna when a parameter of an impedance matching network of the antenna is the current parameter, and the conduction gain prediction value refers to the conduction gain of the antenna when the parameter of the impedance matching network is the first target parameter;
and keeping the impedance value of each element in the impedance matching network of the antenna unchanged when the difference value is smaller than or equal to a first preset threshold value.
6. The method of claim 5, wherein maintaining the impedance value of each element in the antenna's impedance matching network constant comprises:
and keeping the impedance value of each element in the impedance matching network of the antenna unchanged within a preset time length.
7. The method according to any one of claims 1 to 6, wherein the obtaining the reflection coefficient information of the antenna comprises:
acquiring incident voltage and reflected voltage of a coupler connected with the antenna incident port;
and obtaining the reflection coefficient information according to the incident voltage and the reflection voltage.
8. The method of any one of claims 1 to 5, wherein before obtaining the operating frequency band of the antenna, the reflection coefficient information, and the current parameters of the impedance matching network, the method further comprises:
determining whether a transmission port of the antenna is open;
determining whether the transmitting power of the antenna is greater than a second preset threshold value or not under the condition that the transmitting port is opened;
and acquiring the working frequency band, the reflection coefficient information and the current parameters of the impedance matching network under the condition that the transmitting power is greater than a second preset threshold value.
9. The method of claim 8, further comprising:
under the condition that a sending port of the antenna is not opened, acquiring current scene information of the antenna;
or,
acquiring current scene information of the antenna under the condition that the transmitting power is smaller than or equal to the second preset threshold;
and determining preset parameters of the impedance matching network corresponding to the scene information according to the corresponding relation between the scene information and the parameters of the impedance matching network.
10. The method of any of claims 1 to 5, wherein before inputting the operating frequency band, the reflection coefficient information, and current parameters of the impedance matching network into an impedance matching model, the method further comprises:
obtaining sample data, wherein the sample data comprises a sample working frequency band, sample reflection coefficient information and sample parameters of a matching network;
and training the impedance matching model by taking the sample data as input data and second target parameters as target output data to obtain the trained impedance matching model, wherein the second target parameters are parameters of a matching network which enables the conduction gain of the antenna to be maximum when the antenna works in the sample working frequency band.
11. The method according to any one of claims 1 to 5, further comprising:
acquiring the current opening state of each switch in an aperture tuning switch of the antenna, wherein the aperture tuning switch is used for adjusting the electrical length of the antenna;
the inputting the working frequency band, the reflection coefficient information and the current parameter of the impedance matching network into an impedance matching model to obtain a first target parameter of the impedance matching network includes:
and inputting the working frequency band, the reflection coefficient information, the current opening state of each switch and the current parameters of the impedance matching network into an impedance matching model to obtain first target parameters of the impedance matching network.
12. An impedance matching method is applied to electronic equipment, the electronic equipment comprises a radio frequency front end circuit, a radio frequency antenna circuit, an antenna tuning module and an impedance detection module, the radio frequency antenna circuit comprises an antenna, an impedance matching network and an aperture tuning switch, the antenna is respectively connected with the impedance matching network and the aperture tuning switch, the impedance detection module is connected with the antenna tuning module, and the antenna tuning module comprises an impedance matching model; the method comprises the following steps:
the impedance detection module acquires reflection coefficient information; the reflection coefficient information is used for indicating the reflection coefficient of an incident port of the antenna;
the antenna tuning module acquires a working frequency band of the antenna and current parameters of a matching network, wherein the current parameters of the matching network are used for indicating current impedance values of elements in an impedance matching network of the antenna;
and inputting the working frequency band, the reflection coefficient information and the current parameters of the matching network into the impedance matching model to obtain first target parameters of the matching network, wherein the first target parameters of the matching network are used for indicating target impedance values of elements in the impedance matching network of the antenna, and when the parameters of the impedance matching network of the antenna are the first target parameters, the conduction gain of the antenna in the working frequency band is the maximum.
13. The method of claim 12, wherein the rf front-end circuit comprises a coupler, and the coupler is connected to the impedance detection module and the impedance matching network, respectively, and the impedance detection module obtains the reflection coefficient information, comprising:
the impedance detection module obtains incident voltage and reflected voltage of the coupler, and obtains the reflection coefficient information according to the incident voltage and the reflected voltage.
14. An impedance matching apparatus, comprising a processor and a memory, the memory storing a computer program, the processor being configured to retrieve and execute the computer program from the memory, so that the impedance matching apparatus performs the impedance matching method of any one of claims 1 to 11.
15. An impedance matching apparatus, comprising a processor and a memory, the memory storing a computer program, the processor being configured to retrieve and execute the computer program from the memory, so that the impedance matching apparatus performs the impedance matching method of claim 12 or 13.
16. A chip comprising a processor that, when executing instructions, performs the impedance matching method of any one of claims 1 to 11.
17. A chip comprising a processor that, when executing instructions, performs the impedance matching method of claim 12 or 13.
18. An electronic device, comprising a processor configured to couple with a memory, and to read instructions in the memory and cause the electronic device to perform the method according to any one of claims 1 to 11, according to the instructions.
19. An electronic device, comprising a processor configured to couple with a memory, and to read instructions in the memory and cause the electronic device to perform the method of claim 12 or 13 according to the instructions.
20. A computer-readable storage medium having stored thereon computer instructions which, when run on an electronic device, cause the electronic device to perform the method of any one of claims 1-11.
21. A computer-readable storage medium having stored thereon computer instructions which, when run on an electronic device, cause the electronic device to perform the method of claim 12 or 13.
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