CN105990683B - Device and method for adjusting antenna - Google Patents
Device and method for adjusting antenna Download PDFInfo
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- CN105990683B CN105990683B CN201510059928.1A CN201510059928A CN105990683B CN 105990683 B CN105990683 B CN 105990683B CN 201510059928 A CN201510059928 A CN 201510059928A CN 105990683 B CN105990683 B CN 105990683B
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Abstract
The invention provides a device for adjusting an antenna. The device comprises a radio frequency circuit, an antenna and a processor, and further comprises an antenna matching circuit and an antenna coupling line, wherein the radio frequency circuit is connected with the antenna through the antenna matching circuit, the antenna coupling line is electrically connected with the radio frequency circuit, and the processor is electrically connected with the antenna matching circuit and the radio frequency circuit respectively. The invention also provides a method for adjusting the antenna, and the power of the antenna can be adjusted in real time by using the method, so that the efficiency of the antenna is improved.
Description
Technical Field
The invention relates to a device and a method for adjusting an antenna.
Background
At present, electronic devices such as mobile phones are thinner and lighter to attract consumers. This improves the appearance and the hand feeling of the electronic device, but makes the internal space of the electronic device tense, so that the antenna area of the electronic device is compressed to be smaller and smaller, and a plurality of interference devices are placed in the antenna area, thereby increasing the debugging complexity of the antenna.
The existing antenna debugging is basically that the clearance area is not enough, the routing range of the antenna is reduced, so that the bandwidth of the debugged antenna is too narrow, and the consistency of multiple frequency bands cannot be considered. For this antenna manufacturer, the bandwidth is often adjusted by adjusting the matching network of the antenna, which cannot thoroughly improve the bandwidth characteristics of the antenna, so that the working efficiency of the antenna is not high.
Disclosure of Invention
In view of the above, it is desirable to provide an antenna adjusting apparatus and method, which are applied to an electronic apparatus, and can adjust the power of an antenna in real time, so as to improve the efficiency of the antenna, thereby enabling the electronic apparatus to be always in an efficiency-optimized state.
A device for adjusting an antenna comprises a radio frequency circuit, the antenna and a processor, and further comprises an antenna matching circuit and an antenna coupling line, wherein the radio frequency circuit is connected with the antenna through the antenna matching circuit, the antenna coupling line is electrically connected with the radio frequency circuit, and the processor is electrically connected with the antenna matching circuit and the radio frequency circuit.
A method for adjusting an antenna is applied to an electronic device, and comprises the following steps: an obtaining step, namely obtaining a current first capacitance value of a first load and a current coupling power of an antenna, and calculating a first digital signal value corresponding to the coupling power; adjusting, by a processor, the size of the capacitor of the first load to be a second capacitance value, and calculating a second digital signal value corresponding to the coupling power of the antenna at the time; setting the capacitance of the first load as a capacitance value corresponding to the larger one of the first digital signal value and the second digital signal value; in the second adjusting step, the processor continues to adjust the capacitance of the first load to be a third capacitance value, and calculates a third digital signal value corresponding to the coupling power of the antenna at the moment; setting the capacitance of the first load as the capacitance corresponding to the larger of the first digital signal value and the second digital signal value when compared with the third digital signal value.
Compared with the prior art, the device and the method for adjusting the antenna provided by the invention change the matching network of the antenna by adjusting the capacitance value of the first load, so that the frequency deviation of the antenna is adjusted, the working efficiency of the antenna is higher, and the electronic device is always in the optimal efficiency state.
Drawings
Fig. 1 is a hardware architecture diagram of a preferred embodiment of the apparatus for adjusting an antenna according to the present invention.
Fig. 2 is a flow chart of a preferred embodiment of a method for adjusting an antenna according to the present invention.
Description of the main elements
| Device for adjusting antenna | 1 |
| Processor with a memory having a plurality of |
11 |
| |
12 |
| Antenna matching circuit | 13 |
| Antenna with a shield | 14 |
| Antenna coupling wiring | 15 |
| A first load | Cf |
| Second load | C2 |
| Third load | R1 |
The following detailed description will further illustrate the invention in conjunction with the above-described figures.
Detailed Description
Fig. 1 is a diagram showing a hardware architecture of a preferred embodiment of the antenna adjusting apparatus according to the present invention. In the present embodiment, the antenna adjusting apparatus 1 includes, but is not limited to, a processor 11, a radio frequency circuit 12, an antenna matching circuit 13, an antenna 14, and an antenna coupling trace 15. The antenna matching circuit 13 includes a first load Cf, a second load C2, and a third load R1.
The radio frequency circuit 12 is connected to the antenna 14 through the antenna matching circuit 13. The antenna coupling trace 15 is disposed beside the antenna 14 and is electrically connected to the rf circuit 12. The processor 11 is electrically connected to a first load Cf of the antenna matching circuit 13, which is a variable capacitance. In this embodiment, the first load Cf is connected to a General Purpose Input/Output (GPIO) of the processor 11 through a control line. When the processor 11 outputs a controllable voltage to the first load Cf from the GPIO port, the controllable voltage may change a capacitance value of the first load Cf, so as to change a matching network of the antenna 14, so that the efficiency of the antenna 14 is improved as much as possible.
The radio frequency circuit 12 is used for processing the radio frequency signal. The rf circuit 12 includes devices (not shown in the figure) such as an rf transceiver, a power amplifier, an antenna switch, etc., and the rf transceiver may be an MT6166 chip of the MTK platform, etc., and is configured to receive the IQ baseband signal from the processor 11, and modulate the received IQ baseband signal into a high-frequency analog signal to send to the power amplifier; meanwhile, the rf transceiver is also configured to receive a high-frequency analog signal from the power amplifier, modulate the received high-frequency analog signal into an IQ baseband signal, and transmit the IQ baseband signal to the processor 11. The power amplifier may be a SKY77590 chip or the like, and is configured to amplify a radio frequency signal transmitted to the power amplifier. The antenna switch is used for controlling the working state of the antenna, such as switching the frequency band of the antenna, receiving and transmitting states and the like. Preferably, the power amplifier may be integrated with the antenna switch.
The antenna matching circuit 13 is used to adjust the impedance bandwidth of the antenna 14, so that the antenna 14 operates at a higher efficiency state. One end of a first load Cf in the antenna matching circuit 13 is connected to the processor 11 and one end of the third load R1, and the other end of the first load Cf is grounded. In this embodiment, the first load Cf is a variable capacitor. The other end of the third load R1 is connected with one end of a second load C2, and the other end of the second load C2 is grounded. The second load C2 is a fixed capacitor, and the third load R1 is a resistor.
The antenna 14 is used for converting high-frequency electromagnetic waves into high-frequency signal currents. The antenna coupling trace 15 is configured to couple a signal of the antenna 14, and then transmit the coupled signal to the processor 11 through the radio frequency circuit 12, and the processor 11 adjusts the capacitance of the first load Cf according to the magnitude of the coupled signal, so as to adjust the frequency offset of the antenna 14, and enable the antenna 14 to be in an optimal working efficiency state.
Fig. 2 is a flow chart of a method for adjusting an antenna according to a preferred embodiment of the present invention. The order of the steps in the flow chart may be changed, and some steps may be omitted or combined according to different requirements.
Step S01, obtain a current first capacitance value of the first load Cf and a current coupling power of the antenna 14, and calculate a first digital signal value corresponding to the coupling power.
In this embodiment, the current power of the antenna 14 is coupled through the antenna coupling trace 15, the power obtained by coupling is modulated and demodulated through the radio frequency circuit 12 and then is sent to the processor 11, and the processor 11 obtains the size of the digital signal corresponding to the current coupling power value of the antenna 14 through digital-to-analog conversion.
In step S02, the processor 11 adjusts the capacitance of the first load Cf to a second capacitance value, and calculates a second digital signal value corresponding to the coupling power of the antenna 14 at this time. In this embodiment, the processor 11 adjusts the capacitance of the first load Cf, so as to change the matching network of the antenna 14, and the antenna 14 operates at the optimum efficiency.
Step S03, setting the capacitance of the first load Cf to be a capacitance value corresponding to the larger of the first digital signal value and the second digital signal value.
In this embodiment, if the second digital signal value is greater than or equal to the first digital signal value, it means that the processor 11 makes the digital signal corresponding to the coupling power of the antenna 14 become larger and larger in the process of adjusting the capacitance of the first load Cf, and sets the capacitance of the current first load Cf to be the second capacitance value; if the second digital signal value is smaller than the first digital signal value, it indicates that the processor 11 makes the digital signal corresponding to the coupling power of the antenna 14 smaller in the process of adjusting the capacitance of the first load Cf, and sets the current capacitance of the first load Cf to be the first capacitance value.
In step S04, the processor 11 continues to adjust the capacitance of the first load Cf to a third capacitance value, and calculates a third digital signal value corresponding to the coupling power of the antenna 14 at this time.
Step S05, setting the capacitance of the first load Cf to be a capacitance value corresponding to the larger of the first digital signal value and the second digital signal value when compared with the third digital signal value.
In this embodiment, when the larger of the first digital signal value and the second digital signal value is the first digital signal value, and the first digital signal value is greater than or equal to the third digital signal value, the current capacitance of the first load Cf is set to be the first capacitance value; setting a capacitance magnitude of a current first load Cf to the third capacitance value when a larger of the first digital signal value and the second digital signal value is the first digital signal value, but the first digital signal value is less than the third digital signal value; when the larger of the first digital signal value and the second digital signal value is the second digital signal value, and the second digital signal value is greater than or equal to the third digital signal value, setting the capacitance of the current first load Cf to be the second capacitance value; setting a capacitance magnitude of a current first load Cf to the third capacitance value when a larger of the first digital signal value and the second digital signal value is the second digital signal value, but the second digital signal value is less than the third digital signal value.
By executing the above steps S01 to S05 in a cycle of every preset time, the maximum value of the digital signal value corresponding to the coupling power of the antenna 14 can be obtained during the process of adjusting the capacitance of the first load Cf, so that the electronic device is always in the state of optimal efficiency. The preset time may be 5 seconds, and the electronic device may be a mobile phone.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention is described in detail with reference to the above preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (5)
1. A device for adjusting an antenna comprises a radio frequency circuit, an antenna and a processor, and is characterized by further comprising an antenna matching circuit and an antenna coupling line, wherein the radio frequency circuit is connected with the antenna through the antenna matching circuit, the antenna coupling line is electrically connected with the radio frequency circuit, the processor is respectively electrically connected with the antenna matching circuit and the radio frequency circuit, the antenna matching circuit comprises a first load, a second load and a third load, one end of the first load is connected with one end of the processor and one end of the third load, the other end of the first load is grounded, the other end of the third load is connected with one end of the second load, the other end of the second load is grounded, the first load is a variable capacitor, the antenna coupling line is used for coupling signals of the antenna and then transmitting the coupled signals to the processor through the radio frequency circuit, and the processor adjusts the capacitance of the first load according to the coupling signal, so that the maximum digital signal value corresponding to the coupling power of the antenna is obtained, and the antenna is in the optimal working efficiency state.
2. A method for adjusting an antenna using the apparatus of claim 1, applied to an electronic device, the method comprising:
an obtaining step, namely obtaining a current first capacitance value of a first load and a current coupling power of an antenna, and calculating a first digital signal value corresponding to the coupling power;
adjusting, by a processor, the size of the capacitor of the first load to be a second capacitance value, and calculating a second digital signal value corresponding to the coupling power of the antenna at the time;
setting the capacitance of the first load as a capacitance value corresponding to the larger one of the first digital signal value and the second digital signal value;
in the second adjusting step, the processor continues to adjust the capacitance of the first load to be a third capacitance value, and calculates a third digital signal value corresponding to the coupling power of the antenna at the moment;
setting the capacitance of the first load as the capacitance corresponding to the larger of the first digital signal value and the second digital signal value when compared with the third digital signal value.
3. The method of adjusting an antenna according to claim 2, further comprising the step of repeating the obtaining step through the setting step two at predetermined intervals.
4. The method of adjusting an antenna of claim 2, wherein the predetermined time is 5 seconds.
5. The method of adjusting an antenna of claim 2, wherein the electronic device is a cellular phone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510059928.1A CN105990683B (en) | 2015-02-04 | 2015-02-04 | Device and method for adjusting antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510059928.1A CN105990683B (en) | 2015-02-04 | 2015-02-04 | Device and method for adjusting antenna |
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| Publication Number | Publication Date |
|---|---|
| CN105990683A CN105990683A (en) | 2016-10-05 |
| CN105990683B true CN105990683B (en) | 2020-10-09 |
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| CN201510059928.1A Active CN105990683B (en) | 2015-02-04 | 2015-02-04 | Device and method for adjusting antenna |
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Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6657595B1 (en) * | 2002-05-09 | 2003-12-02 | Motorola, Inc. | Sensor-driven adaptive counterpoise antenna system |
| JP4469632B2 (en) * | 2004-02-24 | 2010-05-26 | 富士通株式会社 | Control device for antenna matching circuit |
| KR100677370B1 (en) * | 2004-10-26 | 2007-02-02 | 엘지전자 주식회사 | Apparatus and method for matching antenna of mobile communication terminal |
| CN102143100B (en) * | 2011-01-04 | 2014-01-15 | 意法·爱立信半导体（北京）有限公司 | Method and terminal equipment for automatically tuning impedance match of multiband aerial |
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