CN116366079B - Antenna tuning method, device, antenna matching system and related products - Google Patents
Antenna tuning method, device, antenna matching system and related products Download PDFInfo
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- CN116366079B CN116366079B CN202310612998.XA CN202310612998A CN116366079B CN 116366079 B CN116366079 B CN 116366079B CN 202310612998 A CN202310612998 A CN 202310612998A CN 116366079 B CN116366079 B CN 116366079B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B1/0458—Arrangements for matching and coupling between power amplifier and antenna or between amplifying stages
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The application relates to an antenna tuning method, an antenna tuning device, an antenna matching system, a communication terminal and a storage medium. The method includes receiving a tuning instruction for indicating an operating frequency of the antenna, determining a target circuit matching with an antenna impedance among a plurality of different candidate circuits according to the operating frequency of the antenna, and then gating a link between the antenna and the target circuit, and indicating the antenna to output a radio frequency signal at the operating frequency. According to the method, the impedance matching of the antenna under different working frequencies is realized through flexible gating of the candidate circuits, the flexibility of the impedance matching is improved, and the antenna can keep larger output efficiency under different working frequencies.
Description
Technical Field
The present application relates to the field of antenna technologies, and in particular, to an antenna tuning method, an antenna tuning device, an antenna matching system, and related products.
Background
With the continuous development of communication technology, short-wave communication, which may also be referred to as High Frequency (HF) communication, is increasingly used.
In order to improve the transmission efficiency of the HF antenna, an impedance matching circuit is generally disposed between the transmitter and the antenna to match the impedance of the transmitter and the antenna, so as to achieve maximum power transmission.
In the related art, the impedance matching circuit has a fixed structure, and can only realize single impedance matching, thereby reducing the flexibility of impedance matching.
Disclosure of Invention
Based on this, it is necessary to provide an antenna tuning method, an apparatus, an antenna matching system, a communication terminal, and a computer-readable storage medium in view of the above-described technical problems.
In a first aspect, the present application provides an antenna tuning method, comprising:
receiving a tuning instruction; the tuning instruction is used for indicating the working frequency of the antenna;
determining a target circuit matched with the antenna impedance in a plurality of different candidate circuits according to the working frequency of the antenna;
the link between the antenna and the target circuit is gated, indicating that the antenna outputs a radio frequency signal at an operating frequency.
In one embodiment, the method further comprises:
under the condition that the antenna outputs radio frequency signals at the working frequency, detecting the standing wave ratio of a link between the antenna and a target circuit;
and if the standing-wave ratio does not meet the preset standing-wave ratio requirement, adjusting the standing-wave ratio of the link between the antenna and the target circuit.
In one embodiment, adjusting the standing wave ratio of the link between the antenna and the target circuit includes:
and (3) gating a link between the antenna and the load circuit, and adjusting the load impedance of the load circuit until the standing-wave ratio meets the preset standing-wave ratio requirement.
In one embodiment, the method further comprises:
receiving a control instruction and identifying the control instruction;
and if the control instruction is a tuning instruction, reading the working frequency of the antenna in the tuning instruction.
In a second aspect, the present application also provides an antenna matching system, including: the antenna comprises a control circuit and a plurality of candidate circuits, wherein each candidate circuit is respectively connected with the control circuit and the antenna;
the control circuit is used for receiving a tuning instruction of the antenna; the tuning instruction is used for indicating the working frequency of the antenna;
the plurality of candidate circuits are used for providing impedance matching target circuits for the antenna.
In one embodiment, the system further comprises: a detection circuit; the detection circuit is respectively connected with the control circuit and each candidate circuit;
the detection circuit is used for detecting the standing wave ratio of the link between the control circuit and the candidate circuit.
In one embodiment, the system further comprises: a load circuit; the load circuit is respectively connected with the control circuit and the antenna;
the control circuit is also used for gating a link between the antenna and the load circuit and adjusting the load impedance of the load circuit under the condition that the standing-wave ratio does not meet the preset standing-wave ratio requirement until the standing-wave ratio meets the preset standing-wave ratio requirement.
In a third aspect, the present application also provides an antenna tuning apparatus, including:
the instruction receiving module is used for receiving tuning instructions of the antenna; the tuning instruction is used for indicating the working frequency of the antenna;
the target determining module is used for determining a target circuit matched with the antenna impedance in a plurality of different candidate circuits according to the working frequency of the antenna;
and the link gating module is used for gating a link between the antenna and the target circuit and indicating the antenna to output radio frequency signals at the working frequency.
In a fourth aspect, the present application further provides a communication terminal, including a transmitter, an antenna, and any one of the antenna matching systems described above.
In a fifth aspect, the application also provides a computer device comprising a memory storing a computer program and a processor implementing the steps of any of the methods described above when the processor executes the computer program.
In a sixth aspect, the application also provides a computer readable storage medium having stored thereon a computer program which when executed by a processor performs the steps of any of the methods described above.
In the antenna tuning method, the device, the antenna matching system, the communication terminal and the storage medium, the target circuit matched with the antenna impedance is determined in a plurality of different candidate circuits according to the working frequency of the antenna by receiving the working frequency tuning instruction for indicating the antenna, so that a link between the antenna and the target circuit is gated, and the antenna is instructed to output radio frequency signals at the working frequency. According to the method, the impedance matching of the antenna under different working frequencies is realized through flexible gating of the candidate circuits, the flexibility of the impedance matching is improved, and the antenna can keep larger output efficiency under different working frequencies.
Drawings
FIG. 1 is a diagram of an application environment for an antenna tuning method in one embodiment;
FIG. 2 is a flow chart of an antenna tuning method according to one embodiment;
FIG. 3 is a flow chart of an antenna tuning method according to another embodiment;
FIG. 4 is a flow chart of an antenna tuning method according to another embodiment;
FIG. 5 is a schematic diagram of an antenna matching system in one embodiment;
FIG. 6 is a schematic diagram of a matching unit in one embodiment;
FIG. 7 is a schematic diagram of an antenna matching system according to another embodiment;
FIG. 8 is a schematic diagram of an antenna matching system according to another embodiment;
FIG. 9 is a schematic diagram of a load circuit in one embodiment;
FIG. 10 is a block diagram of an antenna tuning apparatus in one embodiment;
fig. 11 is an internal structural diagram of a communication terminal in one embodiment.
Detailed Description
The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
The embodiment provides an antenna tuning method, which can be applied to an application environment as shown in fig. 1. Wherein the antenna matching system 100 is connected between the transmitter 200 and the antenna 300. Taking the antenna matching system in fig. 1 as an example, the method is specifically applied to a control circuit in the antenna matching system, as shown in fig. 2, and the antenna tuning method includes:
s210, receiving a tuning instruction.
Wherein the tuning instruction is used for indicating the working frequency of the antenna.
A transmitter (also referred to as a "station") is used to transmit tuning instructions to indicate the operating frequency of the antenna.
Optionally, the antenna matching system is in communication with a transmitter for transmitting tuning instructions indicative of the operating frequency of the antenna, the antenna matching system receiving the tuning instructions accordingly.
S220, determining a target circuit matched with the antenna impedance in a plurality of different candidate circuits according to the working frequency of the antenna.
It should be noted that, the impedance of the antenna at different operating frequencies is different, and the impedance of the transmitter end remains unchanged, so that different impedance matching circuits are needed to achieve impedance matching between the transmitter and the antenna.
The antenna matching system is provided with a plurality of impedance matching circuits in advance, and the plurality of impedance matching circuits are connected between the control circuit and the antenna. A plurality of impedance matching circuits are used as candidate circuits for realizing impedance matching between the transmitter and the antenna of the corresponding operating frequency. For example, the candidate circuit Q1 is used for realizing impedance matching of an antenna with the working frequency of 3-3.2 MHz; the candidate circuit Q2 is used for realizing impedance matching of the antenna with the working frequency of 3.2-3.4 MHz.
Optionally, after receiving the tuning instruction, the antenna matching system decodes the tuning instruction to determine an operating frequency of the antenna indicated by the transmitter, and after obtaining the operating frequency of the antenna, determines a candidate circuit corresponding to the operating frequency from a plurality of candidate circuits, so as to determine the candidate circuit as a target circuit.
Optionally, the corresponding relation between each candidate circuit and the working frequency of the antenna is pre-stored in the antenna matching system, and after the working frequency of the antenna is obtained by the antenna matching system, the candidate circuit corresponding to the working frequency of the antenna, namely the target circuit, can be determined in the plurality of candidate circuits according to the corresponding relation.
S230, a link between the gating antenna and the target circuit indicates the antenna to output radio frequency signals at the working frequency.
Optionally, after the antenna matching system determines the target circuit, the link between the antenna and the target circuit may be gated to instruct the antenna to output a radio frequency signal at the operating frequency.
In this embodiment, the antenna matching system receives a tuning instruction for indicating an operating frequency of the antenna, so as to determine a target circuit matching with the antenna impedance in a plurality of different candidate circuits according to the operating frequency of the antenna, and further gate a link between the antenna and the target circuit, and instruct the antenna to output a radio frequency signal at the operating frequency. According to the method, the impedance matching of the antenna under different working frequencies is realized through flexible gating of the candidate circuits, the flexibility of the impedance matching is improved, and the antenna can keep larger output efficiency under different working frequencies.
In order to improve the impedance matching effect between the transmitter and the antenna, in one embodiment, as shown in fig. 3, the method further includes:
s310, detecting the standing wave ratio of a link between the antenna and a target circuit under the condition that the antenna outputs radio frequency signals at the working frequency.
The standing wave ratio is called as voltage standing wave ratio (Voltage Standing Wave Ratio, VSWR) and is the ratio of the voltage amplitude Vmax at the antinode of the standing wave to the voltage amplitude Vmin at the trough, and is used for reflecting the impedance matching effect between the transmitter and the antenna.
Optionally, the antenna matching system may detect voltage information of a standing wave formed on a link between the antenna and the target circuit, and obtain a voltage amplitude Vmax at an antinode of the standing wave and a voltage amplitude Vmin at a trough, so as to calculate a ratio Vmax/Vmin of the voltage amplitude Vmax to the voltage amplitude Vmin, and obtain a standing wave ratio. Wherein, the closer the standing wave ratio is to 1, the fewer the reflected signals on the characterization link, the better the impedance matching effect between the transmitter and the antenna; conversely, the larger the standing wave ratio, the more signals that are reflected on the characterization link, and the poorer the impedance matching effect between the transmitter and the antenna.
Optionally, in a case where the link between the antenna and the target circuit is gated and the antenna outputs a radio frequency signal at a working frequency, the antenna matching system may further detect a standing wave ratio of the link between the antenna and the target circuit, so as to determine an impedance matching effect between the transmitter and the antenna brought by the target circuit according to the standing wave ratio.
S320, if the standing-wave ratio does not meet the preset standing-wave ratio requirement, the standing-wave ratio of the link between the antenna and the target circuit is adjusted.
Optionally, the antenna matching system may compare the standing-wave ratio of the detected link between the antenna and the target circuit with a preset standing-wave ratio requirement, so as to determine whether the impedance matching effect is qualified according to whether the detected standing-wave ratio meets the standing-wave ratio requirement, and adjust the standing-wave ratio of the link between the antenna and the target circuit under the condition that the standing-wave ratio does not meet the preset standing-wave ratio requirement, so that the adjusted standing-wave ratio meets the preset standing-wave ratio requirement.
Optionally, if the standing-wave ratio does not meet the preset standing-wave ratio requirement, the antenna matching system may determine a new target circuit among the plurality of candidate circuits and gate a link between the new target circuit and the antenna. Therefore, under the condition that the original link is interfered, a new target circuit is switched in time, and the signal receiving and transmitting of the antenna are ensured.
Optionally, if the standing-wave ratio meets the preset standing-wave ratio requirement, the antenna matching system can determine that the impedance matching effect is qualified, and can feed back a detection result that the impedance matching effect is qualified to the transmitter.
Optionally, the preset standing-wave ratio requirement may include a standing-wave ratio threshold, and accordingly, determining the impedance matching effect according to whether the detected standing-wave ratio meets the standing-wave ratio requirement includes: if the standing-wave ratio obtained by detection is smaller than or equal to the standing-wave ratio threshold value, determining that the impedance matching effect is qualified; otherwise, if the standing-wave ratio obtained by detection is larger than the standing-wave ratio threshold value, determining that the impedance matching effect is not qualified.
Optionally, the preset standing-wave ratio requirement may include a standing-wave ratio change threshold, and accordingly, determining the impedance matching effect according to whether the detected standing-wave ratio meets the standing-wave ratio requirement includes: acquiring a difference value between the standing-wave ratio obtained by detection and a preset standing-wave ratio threshold value, and if the difference value is smaller than or equal to the standing-wave ratio change threshold value, determining that the impedance matching effect is qualified; otherwise, if the difference is larger than the standing-wave ratio change threshold, determining that the impedance matching effect is not qualified.
In this embodiment, when the antenna outputs a radio frequency signal at a working frequency, the antenna matching system may detect a standing-wave ratio of a link between the antenna and the target circuit, and adjust the standing-wave ratio of the link between the antenna and the target circuit when the standing-wave ratio does not meet a preset standing-wave ratio requirement. In the method, under the condition of gating the target circuit, the actual impedance matching effect can be determined according to the standing-wave ratio obtained by detection, so that the standing-wave ratio of a link between the antenna and the target circuit is adjusted under the condition that the standing-wave ratio does not meet the preset standing-wave ratio requirement, the impedance matching effect is further improved, and excessive candidate circuits are prevented from being arranged in the antenna matching system, so that the circuit structure inside the antenna matching system is simplified as much as possible, and the lightening is realized.
The standing wave ratio may also represent a ratio of an antenna end impedance R (output impedance of the antenna) to a transmitter end impedance R (input impedance of the antenna), and the antenna matching system may further include a load circuit connected between the control circuit and the antenna for changing the transmitter end impedance to adjust the standing wave ratio of the link between the antenna and the target circuit.
In an alternative embodiment, the antenna matching system may gate a link between the antenna and the load circuit and adjust the load impedance of the load circuit until the standing-wave ratio meets the preset standing-wave ratio requirement under the condition that the standing-wave ratio does not meet the preset standing-wave ratio requirement.
Optionally, the load circuit includes a plurality of resistors connected in series and/or in parallel, and under the condition that the standing-wave ratio does not meet the preset standing-wave ratio requirement, the antenna matching system can gate a link between the antenna and the load circuit, control a switch in the load circuit, change the series-parallel relationship of the resistors in the load circuit, so as to change the load impedance, further change the impedance of the transmitter end, and realize the adjustment of the standing-wave ratio of the link between the antenna and the target circuit until the standing-wave ratio is adjusted to meet the preset standing-wave ratio requirement. For example, the standing-wave ratio requirement is that the standing-wave ratio reaches 1.5, the antenna matching system detects that the standing-wave ratio is 1.8, namely R/r=1.8, a switch in a load circuit is controlled, and the serial-parallel connection relation of resistors in the load circuit is changed to increase the impedance R of a transmitter end, so that the standing-wave ratio is smaller than or equal to 1.5.
In this embodiment, under the condition that the standing-wave ratio does not meet the preset standing-wave ratio requirement, the antenna matching system may gate a link between the antenna and the load circuit and adjust the load impedance of the load circuit until the standing-wave ratio meets the preset standing-wave ratio requirement. In the method, the actual impedance matching effect in the adjusting circuit can be thinned through the load circuit, so that the impedance matching effect between the transmitter and the antenna is improved.
In practical application, the transmitter can not only transmit tuning instructions, but also transmit other control instructions. Based on this, in one embodiment, as shown in fig. 4, the method further includes:
s410, receiving a control instruction and identifying the control instruction.
Optionally, the antenna matching system receives a control instruction transmitted by the transmitter and identifies a byte encoding of the control instruction to determine the type of the control instruction. Different byte encodings correspond to different types of control instructions for implementing different functions.
Optionally, the control instructions include tuning instructions for indicating an operating frequency of the antenna; the system also comprises a reset instruction, which is used for controlling the antenna matching system to reset, such as controlling the gating state of each circuit in the antenna matching system to restore the default setting; and the system also comprises a stop instruction for maintaining the current gating state of each circuit in the antenna matching system.
S420, if the control instruction is a tuning instruction, the working frequency of the antenna in the tuning instruction is read.
Optionally, when the antenna matching system identifies that the control instruction is a tuning instruction, the antenna matching system executes the step of reading the working frequency of the antenna in the tuning instruction, so as to execute the following steps of determining a target circuit matching with the antenna impedance in a plurality of different candidate circuits according to the working frequency of the antenna, gating a link between the antenna and the target circuit, and instructing the antenna to output a radio frequency signal at the working frequency.
Optionally, when the antenna matching system identifies that the control instruction is a reset instruction, the antenna matching system executes a step of controlling the gating states of the circuits in the antenna matching system to restore to a default setting, for example, a step of controlling links between a plurality of candidate circuits in the antenna matching system and the antenna to be disconnected and controlling links between the load circuit and the antenna to be disconnected.
Optionally, in the case that the antenna matching system recognizes the control command as a stop command, the antenna matching system performs the step of maintaining the current gating state of each circuit in the antenna matching system. The transmitter can respond to the pressing operation of a user on a stop button or transmit a stop instruction when receiving feedback information that the standing-wave ratio reaches the preset standing-wave ratio requirement.
Optionally, the antenna matching system is further configured to send feedback information to the transmitter. Wherein the feedback information may include tuning completion corresponding to tuning instructions transmitted by the transmitter; the feedback information may also include a reset completion corresponding to a reset instruction transmitted by the transmitter; the feedback information may also include the standing-wave ratio detected by the detection circuit, and/or whether the standing-wave ratio meets a preset standing-wave ratio requirement.
Optionally, the feedback information further includes a detection result for the control instruction. If the antenna matching system can identify the type of the control instruction, feeding back the feedback information of the correct control instruction to the transmitter; otherwise, if the antenna matching system can not identify the type of the control instruction, feedback information of the control instruction error is fed back to the transmitter.
Optionally, the transmitter comprises a display screen for displaying the feedback information. For example, the operating frequency of the tuned antenna is displayed, as well as the standing wave ratio in real time.
In this embodiment, the method further includes receiving and identifying a control instruction, so as to read the operating frequency of the antenna in the tuning instruction when the control instruction is the tuning instruction. In the method, the received control instruction can be identified, and the steps of corresponding functions are executed under the condition that the control instruction is the tuning instruction, so that the intelligence of antenna tuning is improved.
It should be understood that, although the steps in the flowcharts related to the embodiments described above are sequentially shown as indicated by arrows, these steps are not necessarily sequentially performed in the order indicated by the arrows. The steps are not strictly limited to the order of execution unless explicitly recited herein, and the steps may be executed in other orders. Moreover, at least some of the steps in the flowcharts described in the above embodiments may include a plurality of steps or a plurality of stages, which are not necessarily performed at the same time, but may be performed at different times, and the order of the steps or stages is not necessarily performed sequentially, but may be performed alternately or alternately with at least some of the other steps or stages.
The embodiment also provides an antenna matching system for realizing the antenna tuning method. As shown in fig. 5, the antenna matching system 100 includes: control circuit 110, a plurality of candidate circuits 120. Each candidate circuit 120 is connected to the control circuit 110 and the antenna 300, respectively.
The control circuit 110 is configured to receive a tuning instruction; the tuning instruction is used to instruct the operating frequency of the antenna 300. The plurality of candidate circuits 120 are used to provide impedance matching target circuits for the antenna 300.
Optionally, the control circuit 110 includes a control chip and a power supply connected to the control chip. The control chip is used for controlling gating of the circuit, and the power supply is used for supplying power to the whole antenna matching system.
Optionally, the candidate circuit 120 is an LC circuit, and the impedance matching effect achieved by the candidate circuit 120 formed by different capacitance parameters and inductance parameters in the LC circuit is different, so that the candidate circuit is adaptable to antennas with different operating frequencies.
Alternatively, the control chip may be a micro control unit (Microcontroller Unit, MCU). The power supply is set according to the requirement, and can be a 5V power supply or a 12V power supply.
Optionally, the antenna matching system 100 communicates with the transmitter 200 through a communication port on the control chip to receive the tuning instruction transmitted by the transmitter 200 and decode to obtain the operating frequency of the antenna 300. The communication port may be a serial interface. The control chip is also provided with a control port connected with the candidate circuit 120 to realize gating of the link between the candidate circuit 120 and the antenna 300.
Optionally, the corresponding relation between each candidate circuit 120 and the antenna operating frequency is pre-stored in the control circuit 110, so that after the operating frequency of the antenna 300 is obtained, the control circuit 110 can determine, from the plurality of candidate circuits 120, the candidate circuit 120 corresponding to the operating frequency of the antenna 300 as a target circuit according to the corresponding relation, and control and gate a link between the target circuit and the antenna 300.
As shown in fig. 6, a matching unit including 8 candidate circuits 120 is provided, an input interface of the matching unit is connected to each control circuit, an output interface is connected to an antenna, the input interface connects a gating signal sent by the control circuit 110, and turns on a switch K connected to a target circuit, that is, a link between the target circuit and the antenna can be gated, and impedance matching between the transmitter and the antenna is achieved by the target circuit.
Alternatively, the gating of the candidate circuits may be achieved by a decoding circuit. The decoding circuit comprises a control line interface and a decoder. The control line interfaces are respectively connected with the control circuit 110 and a decoder, and the decoder is connected to a total transmission line of the plurality of candidate circuits in parallel. The decoder can switch on a switch connected with the target circuit based on the transmission of the control line interface, and particularly can control the on-off of the switch by controlling the high and low levels of the connection pins of the switch. The switch can be a relay or a PIN electronic switch.
In one embodiment, as shown in fig. 7, the system further includes: and a detection circuit 130. The detection circuit 130 is connected to the control circuit 110 and each candidate circuit 120.
Wherein the detection circuit 130 is configured to detect a standing wave ratio of a link between the control circuit 110 and the candidate circuit 120.
Optionally, the detection circuit 130 is specifically configured to detect standing wave ratios of links between the target circuit and the antenna 300 in the plurality of candidate circuits 120. The detection circuit 130 includes a directional coupling circuit.
Optionally, after receiving the frequency modulation command, the control circuit 110 starts a/D signal acquisition by the directional coupling circuit to determine voltage information of a standing wave formed on a link between the target circuit and the antenna 300, and obtains a voltage amplitude Vmax at an antinode of the standing wave and a voltage amplitude Vmin at a trough of the standing wave to calculate a ratio Vmax/Vmin of the voltage amplitude Vmax to the voltage amplitude Vmin, so as to obtain a standing wave ratio.
Optionally, a detection feedback interface on a control chip in the control circuit 110 is connected with the detection circuit 130 to receive the detected standing-wave ratio, and may also feed back the detected standing-wave ratio to the transmitter 200 according to a preset data frame format, so as to monitor the standing-wave ratio, adjust the standing-wave ratio in time, or control the antenna matching system to stop working, so as to prevent the standing-wave ratio from being too large, and cause the reflected signal to burn the transmitter 200.
In one embodiment, as shown in fig. 8, the system further includes: and a load circuit 140. The load circuit 140 is connected to the control circuit 110 and the antenna 300, respectively.
The control circuit 110 is further configured to gate a link between the antenna 300 and the load circuit 140 and adjust a load impedance of the load circuit 140 when the standing-wave ratio does not meet the preset standing-wave ratio requirement, until the standing-wave ratio meets the preset standing-wave ratio requirement.
Optionally, the load circuit 140 includes a plurality of resistors connected in series and/or in parallel, and in case that the standing-wave ratio does not meet the preset standing-wave ratio requirement, the control circuit 110 may gate the link between the antenna 300 and the load circuit 140, control the switch in the load circuit 140, change the series-parallel relationship of the resistors in the load circuit 140, so as to change the load impedance, further change the impedance of the transmitter 200, and implement adjustment of the standing-wave ratio of the link between the antenna 300 and the target circuit until the standing-wave ratio is adjusted to meet the preset standing-wave ratio requirement.
As shown in fig. 9, a load circuit includes a plurality of load cells, each load cell C is formed of a capacitor, an inductor, alone or in parallel combination. The control circuit 110 can gate different load units C through switches, and any combination of the capacitance value and the inductance value of the circuit can be increased or decreased to change the load impedance, change the impedance of the transmitter 200 end, and realize the adjustment of standing wave ratio of the link between the antenna 300 and the target circuit.
Based on the same inventive concept, the embodiment of the application also provides an antenna tuning device for realizing the antenna tuning method. The implementation of the solution provided by the device is similar to the implementation described in the above method, so the specific limitation in the embodiments of the antenna tuning device or devices provided below may be referred to the limitation of the antenna tuning method hereinabove, and will not be repeated here.
In one embodiment, as shown in fig. 10, there is provided an antenna tuning apparatus including: an instruction receiving module 1001, a target determining module 1002, and a link gating module 1003, wherein:
the instruction receiving module 1001 is configured to receive a tuning instruction of an antenna; the tuning instruction is used for indicating the working frequency of the antenna;
the target determining module 1002 is configured to determine a target circuit matching with an antenna impedance among a plurality of different candidate circuits according to an operating frequency of the antenna;
the link gating module 1003 is used to gate a link between the antenna and the target circuit, and instructs the antenna to output a radio frequency signal at an operating frequency.
In one embodiment, the method further comprises: a standing wave detection module;
the standing wave detection module includes: a detection unit and an adjustment unit;
the detection unit is used for detecting the standing wave ratio of a link between the antenna and the target circuit under the condition that the antenna outputs radio frequency signals at the working frequency;
the adjusting unit is used for adjusting the standing-wave ratio of the link between the antenna and the target circuit if the standing-wave ratio does not meet the preset standing-wave ratio requirement.
In one of the embodiments, the adjustment unit is for:
and (3) gating a link between the antenna and the load circuit, and adjusting the load impedance of the load circuit until the standing-wave ratio meets the preset standing-wave ratio requirement.
In one embodiment, the apparatus further includes: an instruction recognition module;
the instruction identification module comprises a receiving unit and a reading unit:
the receiving unit is used for receiving the control instruction and identifying the control instruction;
the reading unit is used for reading the working frequency of the antenna in the tuning instruction if the control instruction is the tuning instruction.
The respective modules in the above-described antenna tuning apparatus may be implemented in whole or in part by software, hardware, and combinations thereof. The above modules may be embedded in hardware or may be independent of a processor in the computer device, or may be stored in software in a memory in the computer device, so that the processor may call and execute operations corresponding to the above modules.
Also provided in this embodiment is a communication terminal, as shown in fig. 1, including a transmitter 200, an antenna 300, and an antenna matching system 100 of any of the above.
It should be noted that, the antenna matching system 100 is used to implement any one of the above-mentioned antenna tuning methods, and the specific content and structure are referred to the above-mentioned embodiments, and are not repeated here.
The internal structural diagram of the communication terminal may include a processor, a memory, a communication interface, a display screen, and an input device connected through a system bus, as shown in fig. 11. Wherein the processor of the communication terminal is adapted to provide computing and control capabilities. The memory of the communication terminal includes a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The communication interface of the computer device is used for carrying out wired or wireless communication with an external terminal, and the wireless mode can be realized through WIFI, a mobile cellular network, NFC (near field communication) or other technologies. The computer program is executed by a processor to implement an antenna tuning method. The display screen of the communication terminal can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer equipment can be a touch layer covered on the display screen, can also be keys, a track ball or a touch pad arranged on the shell of the computer equipment, and can also be an external keyboard, a touch pad or a mouse and the like.
It will be appreciated by those skilled in the art that the structure shown in FIG. 11 is merely a block diagram of some of the structures associated with the present inventive arrangements and is not limiting of the computer device to which the present inventive arrangements may be applied, and that a particular computer device may include more or fewer components than shown, or may combine some of the components, or have a different arrangement of components.
In one embodiment, a computer readable storage medium is provided having a computer program stored thereon, which when executed by a processor, performs the steps of:
receiving a tuning instruction; the tuning instruction is used for indicating the working frequency of the antenna; determining a target circuit matched with the antenna impedance in a plurality of different candidate circuits according to the working frequency of the antenna; the link between the antenna and the target circuit is gated, indicating that the antenna outputs a radio frequency signal at an operating frequency.
In one embodiment, the computer program when executed by the processor further performs the steps of:
under the condition that the antenna outputs radio frequency signals at the working frequency, detecting the standing wave ratio of a link between the antenna and a target circuit; and if the standing-wave ratio does not meet the preset standing-wave ratio requirement, adjusting the standing-wave ratio of the link between the antenna and the target circuit.
In one embodiment, the computer program when executed by the processor further performs the steps of:
and (3) gating a link between the antenna and the load circuit, and adjusting the load impedance of the load circuit until the standing-wave ratio meets the preset standing-wave ratio requirement.
In one embodiment, the computer program when executed by the processor further performs the steps of:
receiving a control instruction and identifying the control instruction; and if the control instruction is a tuning instruction, reading the working frequency of the antenna in the tuning instruction.
In one embodiment, a computer program product is provided comprising a computer program which, when executed by a processor, performs the steps of:
receiving a tuning instruction; the tuning instruction is used for indicating the working frequency of the antenna; determining a target circuit matched with the antenna impedance in a plurality of different candidate circuits according to the working frequency of the antenna; the link between the antenna and the target circuit is gated, indicating that the antenna outputs a radio frequency signal at an operating frequency.
In one embodiment, the computer program when executed by the processor further performs the steps of:
under the condition that the antenna outputs radio frequency signals at the working frequency, detecting the standing wave ratio of a link between the antenna and a target circuit; and if the standing-wave ratio does not meet the preset standing-wave ratio requirement, adjusting the standing-wave ratio of the link between the antenna and the target circuit.
In one embodiment, the computer program when executed by the processor further performs the steps of:
and (3) gating a link between the antenna and the load circuit, and adjusting the load impedance of the load circuit until the standing-wave ratio meets the preset standing-wave ratio requirement.
In one embodiment, the computer program when executed by the processor further performs the steps of:
receiving a control instruction and identifying the control instruction; and if the control instruction is a tuning instruction, reading the working frequency of the antenna in the tuning instruction.
Those skilled in the art will appreciate that implementing all or part of the above described methods may be accomplished by way of a computer program stored on a non-transitory computer readable storage medium, which when executed, may comprise the steps of the embodiments of the methods described above. Any reference to memory, database, or other medium used in embodiments provided herein may include at least one of non-volatile and volatile memory. The nonvolatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical Memory, high density embedded nonvolatile Memory, resistive random access Memory (ReRAM), magnetic random access Memory (Magnetoresistive Random Access Memory, MRAM), ferroelectric Memory (Ferroelectric Random Access Memory, FRAM), phase change Memory (Phase Change Memory, PCM), graphene Memory, and the like. Volatile memory can include random access memory (Random Access Memory, RAM) or external cache memory, and the like. By way of illustration, and not limitation, RAM can be in the form of a variety of forms, such as Static Random access memory (Static Random access memory AccessMemory, SRAM) or dynamic Random access memory (Dynamic Random Access Memory, DRAM), and the like. The databases referred to in the embodiments provided herein may include at least one of a relational database and a non-relational database. The non-relational database may include, but is not limited to, a blockchain-based distributed database, and the like. The processor referred to in the embodiments provided in the present application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic unit, a data processing logic unit based on quantum computing, or the like, but is not limited thereto.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing examples illustrate only a few embodiments of the application and are described in detail herein without thereby limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of the application should be assessed as that of the appended claims.
Claims (10)
1. A method of tuning an antenna, the method comprising:
receiving a tuning instruction; the tuning instruction is used for indicating the working frequency of the antenna;
determining a target circuit matched with the antenna impedance in a plurality of different candidate circuits according to the working frequency of the antenna and the corresponding relation between each pre-stored candidate circuit and the working frequency of the antenna;
gating a link between the antenna and the target circuit, instructing the antenna to output a radio frequency signal at the operating frequency;
detecting standing wave ratio of a link between the antenna and the target circuit under the condition that the antenna outputs radio frequency signals at the working frequency;
if the standing-wave ratio does not meet the preset standing-wave ratio requirement, a link between the antenna and the load circuit is gated, a switch in the load circuit is controlled, and the series-parallel connection relation of resistors in the load circuit is changed to change the load impedance of the load circuit until the standing-wave ratio meets the preset standing-wave ratio requirement.
2. The method according to claim 1, wherein the method further comprises:
receiving a control instruction and identifying the control instruction;
and if the control instruction is the tuning instruction, reading the working frequency of the antenna in the tuning instruction.
3. The method according to claim 2, wherein the method further comprises:
and if the control instruction is a reset instruction, controlling the gating state of each circuit to restore the default setting.
4. The method according to claim 2, wherein the method further comprises:
and if the control instruction is a stop instruction, maintaining the current gating state of each circuit.
5. The method of claim 2, wherein the identifying the control instruction comprises:
a byte encoding of the control instruction is identified to determine a type of the control instruction.
6. An antenna matching system, the system comprising: the antenna comprises a control circuit and a plurality of candidate circuits, wherein each candidate circuit is respectively connected with the control circuit and the antenna;
the control circuit is used for receiving a tuning instruction of the antenna; the tuning instruction is used for indicating the working frequency of the antenna; determining a target circuit matched with the antenna impedance in a plurality of different candidate circuits according to the working frequency of the antenna and the corresponding relation between each pre-stored candidate circuit and the working frequency of the antenna; gating a link between the antenna and the target circuit, instructing the antenna to output a radio frequency signal at the operating frequency;
the plurality of candidate circuits are used for providing impedance matching target circuits for the antenna;
the system further comprises: a detection circuit; the detection circuit is respectively connected with the control circuit and each candidate circuit;
the detection circuit is used for detecting the standing wave ratio of the link between the control circuit and the candidate circuit;
the system further comprises: a load circuit; the load circuit is respectively connected with the control circuit and the antenna;
the control circuit is further used for gating a link between the antenna and the load circuit and controlling a switch in the load circuit under the condition that the standing-wave ratio does not meet the preset standing-wave ratio requirement, so as to change the series-parallel connection relation of resistors in the load circuit and change the load impedance of the load circuit until the standing-wave ratio meets the preset standing-wave ratio requirement.
7. The system of claim 6, wherein the candidate circuit is an LC circuit.
8. An antenna tuning apparatus, the apparatus comprising:
the instruction receiving module is used for receiving tuning instructions of the antenna; the tuning instruction is used for indicating the working frequency of the antenna;
the target determining module is used for determining a target circuit matched with the antenna impedance in a plurality of different candidate circuits according to the working frequency of the antenna and the corresponding relation between each pre-stored candidate circuit and the working frequency of the antenna;
the link gating module is used for gating a link between the antenna and the target circuit and indicating the antenna to output radio frequency signals at the working frequency;
the standing wave detection module is used for detecting the standing wave ratio of a link between the antenna and the target circuit under the condition that the antenna outputs radio frequency signals at the working frequency, gating the link between the antenna and the load circuit under the condition that the standing wave ratio does not meet the preset standing wave ratio requirement, controlling a switch in the load circuit, and changing the serial-parallel connection relation of resistors in the load circuit so as to change the load impedance of the load circuit until the standing wave ratio meets the preset standing wave ratio requirement.
9. A communication terminal comprising a transmitter, an antenna and an antenna matching system as claimed in claim 6 or 7.
10. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the method of any of claims 1-5.
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