CN102545936A - Antenna tuner and antenna tuning system - Google Patents
Antenna tuner and antenna tuning system Download PDFInfo
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- CN102545936A CN102545936A CN2011104001349A CN201110400134A CN102545936A CN 102545936 A CN102545936 A CN 102545936A CN 2011104001349 A CN2011104001349 A CN 2011104001349A CN 201110400134 A CN201110400134 A CN 201110400134A CN 102545936 A CN102545936 A CN 102545936A
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Abstract
The invention provides an antenna tuner and an antenna tuning system. The antenna tuner comprises a sampling circuit, an automatic tuning control circuit, an impedance transformer, a motor, a variable Inductor and an inductor. The sampling circuit is connected between an external transmitter and the impedance transformer in series, and is used for obtaining a phase comparison signal of the current and voltage values of the input signals, and outputting the phase comparison signal to the automatic tuning control circuit for measuring the phase difference; the automatic tuning control circuit is used for setting the impedance transformer and the inductor according to the working frequency, and setting the variable inductor through the motor according to the phase difference; the input signals are transmitted to the impedance transformer through the sampling circuit, and are further transmitted to the variable inductor through the impedance transformer, and the signals are coupled to an external antenna after being processed by the variable inductor. For the antenna tuner and the antenna tuning system, the phase difference is taken as the reference for adjustment, so that the tuning efficiency can be higher.
Description
Technical field
The present invention relates to the tuning field of a kind of antenna, especially relate to a kind of antenna tuner and antenna tuning system.
Background technology
One of key technology that the antenna automatic tuning technology is, existing antenna tuner adopt as compare separately the tuning manner of impedance mostly.According to phase difference value each parameter of antenna is not carried out tuningly, so tuning effect is accurate inadequately, and when the antenna tuner did not have the memory tuning parameter, antenna tuner just need be searched for parameters needed, and tuning period has also just extended.
Summary of the invention
The technical problem that the present invention solves is, a kind of antenna tuner and antenna tuning system are provided, and can solve the tuning accurate inadequately of present antenna tuner, the problem that tuning period is long.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts provides a kind of antenna tuner, comprises sample circuit, Tuning Control circuit, impedance transformer, motor, variable inductance, inductance; Said sample circuit is serially connected with between external transmitter and the impedance transformer, is used to obtain the electric current of input signal and the comparison of signal phase of magnitude of voltage, and exports said comparison of signal phase difference to the Tuning Control circuit and be used for measure phase difference; Said Tuning Control circuit is set said impedance transformer and said inductance according to said operating frequency phase difference, and said variable inductance is set through said motor according to said phase difference; Input signal is sent to impedance transformer through sample circuit, is transferred to variable inductance through impedance transformer again, and signal is through behind the variable inductance, again through being inductively coupled on the external antenna.
Wherein, said sample circuit comprise the current sampling unit, the electric current square wave conversion unit that is connected with the current sampling unit, voltage sampling unit, the voltage square wave converter unit that is connected with the voltage sampling unit; Said current sampling unit is connected to external transmitter, and input signal is carried out current sampling, and the output sampling current carries out the electric current square wave conversion to electric current square wave conversion unit; Said voltage sampling unit is connected to said current sampling unit, and input signal is carried out voltage sampling, and the output sampling voltage is carried out the voltage square wave conversion to the voltage square wave converter unit; Said electric current square wave conversion unit, voltage square wave converter unit all are connected with said Tuning Control circuit.
Wherein, also comprise the antenna current table, said antenna current table is connected with the output of said impedance transformer.
Wherein, said Tuning Control circuit comprises detected phase difference unit, CPU; Said detected phase difference unit receives the voltage-phase from the voltage square wave converter unit, and receives the current phase from electric current square wave conversion unit, and the difference of more said voltage-phase and current phase, and the output phase difference is to said CPU; Said CPU is connected with external main frame, is used to the operating frequency of the standard of obtaining, and obtains the standard operation parameter according to the operating frequency of said standard, compares with said phase difference value, according to comparison result described motor, impedance transformer is made fine setting.
Wherein, said CPU comprises memory cell, and said cell stores standard parameter value after said CPU obtains the standard frequency value, judges whether said memory cell has the standard parameter value of corresponding frequencies, if then call this standard value; If not, then seek standard parameter value under the frequency values the most close with said standard frequency value.
Wherein, said standard parameter value comprises the parameter of electric machine, impedance conversion parameter or variable inductance parameter.
For solving the problems of the technologies described above, the present invention also provides a kind of antenna tuning system, comprises transmitter, main frame, antenna tuner, antenna; Said transmitter, main frame, antenna all are connected with said antenna tuner; Said transmitter is used for to said antenna tuner emission input signal; Said main frame is used for sending the standard frequency value to antenna tuner; Said antenna tuner comprises sample circuit, Tuning Control circuit, impedance transformer, motor, variable inductance, inductance; Said sample circuit is serially connected with between external transmitter and the impedance transformer, is used to obtain the electric current of input signal and the comparison of signal phase of magnitude of voltage, and exports said comparison of signal phase difference to the Tuning Control circuit and be used for measure phase difference; Said Tuning Control circuit is set said impedance transformer and said inductance according to said operating frequency phase difference, and said variable inductance is set through said motor according to said phase difference; Input signal is sent to impedance transformer through sample circuit, is transferred to variable inductance through impedance transformer again, and signal is through behind the variable inductance, again through being inductively coupled on the external antenna.
Wherein, said sample circuit comprise the current sampling unit, the electric current square wave conversion unit that is connected with the current sampling unit, voltage sampling unit, the voltage square wave converter unit that is connected with the voltage sampling unit; Said current sampling unit is connected to external transmitter, and input signal is carried out current sampling, and the output sampling current carries out the electric current square wave conversion to electric current square wave conversion unit; Said voltage sampling unit is connected to said current sampling unit, and input signal is carried out voltage sampling, and the output sampling voltage is carried out the voltage square wave conversion to the voltage square wave converter unit; Said electric current square wave conversion unit, voltage square wave converter unit all are connected with said Tuning Control circuit.
Wherein, said Tuning Control circuit comprises detected phase difference unit, CPU; Said detected phase difference unit receives the voltage-phase from the voltage square wave converter unit, and receives the current phase from electric current square wave conversion unit, and the difference of more said voltage-phase and current phase, and the output phase difference is to said CPU; Said CPU is connected with external main frame, is used to the operating frequency of the standard of obtaining, and obtains the standard operation parameter according to the operating frequency of said standard, compares with said phase difference value, according to comparison result described motor, impedance transformer is made fine setting.
Wherein, said CPU comprises memory cell, and said cell stores standard parameter value after said CPU obtains the standard frequency value, judges whether said memory cell has the standard parameter value of corresponding frequencies, if then call this standard value; If not, then seek standard parameter value under the frequency values the most close with said standard frequency value.
Adopt technique scheme, antenna tuner is tuning accurate inadequately in the contrast prior art, the problem that tuning period is long; The invention has the beneficial effects as follows: sample circuit is taken a sample to the voltage and current phase place of input signal, and the Tuning Control circuit is analyzed phase difference value, the resistance value of control group converter; And the control rotating speed of motor, thereby the appearance value of control variable inductance, so just can be in real time according to the situation of current input signal; Equipment to antenna tuner inside is adjusted; To reach best tuning effect, adopt the benchmark of phase difference value as adjustment, make that tuning efficient is higher.
Description of drawings
Fig. 1 is the structure chart of a kind of antenna tuner provided by the invention;
Fig. 2 is the structure chart of the specific embodiment of a kind of antenna tuner provided by the invention;
Fig. 3 is the structure chart of Tuning Control circuit provided by the invention;
Fig. 4 is the software workflow figure of the CPU in the Tuning Control circuit provided by the invention;
Fig. 5 is the structure chart of a kind of antenna tuning system provided by the invention.
Embodiment
By specifying technology contents of the present invention, structural feature, realized purpose and effect, give explanation below in conjunction with execution mode and conjunction with figs. are detailed.
See also Fig. 1, the present invention provides a kind of antenna tuner, comprises sample circuit, Tuning Control circuit, impedance transformer, motor, variable inductance, inductance; Said sample circuit is serially connected with between external transmitter and the impedance transformer, is used to obtain the electric current of input signal and the comparison of signal phase of magnitude of voltage, and exports said comparison of signal phase difference to the Tuning Control circuit and be used for measure phase difference; Said Tuning Control circuit is set said impedance transformer and said inductance according to said operating frequency phase difference, and said variable inductance is set through said motor according to said phase difference; Input signal is sent to impedance transformer through sample circuit, is transferred to variable inductance through impedance transformer again, and signal is through behind the variable inductance, again through being inductively coupled on the external antenna.
See also Fig. 2; Fig. 2 is a specific embodiment of a kind of antenna tuner provided by the invention; In the present embodiment, further be improved to: the electric current square wave conversion unit that said sample circuit comprises the current sampling unit, be connected with the current sampling unit, voltage sampling unit, the voltage square wave converter unit that is connected with the voltage sampling unit; Said current sampling unit is connected to external transmitter, and input signal is carried out current sampling, and the output sampling current carries out the electric current square wave conversion to electric current square wave conversion unit; Said voltage sampling unit is connected to said current sampling unit, and input signal is carried out voltage sampling, and the output sampling voltage is carried out the voltage square wave conversion to the voltage square wave converter unit; Said electric current square wave conversion unit, voltage square wave converter unit all are connected with said Tuning Control circuit.
Further, the present invention also comprises the antenna current table, and said antenna current table is connected with the output of said impedance transformer.
See also Fig. 3, further, said Tuning Control circuit comprises detected phase difference unit, CPU;
Said detected phase difference unit receives the voltage-phase from the voltage square wave conversion, and receives the current phase from electric current square wave conversion unit, and the difference of more said voltage-phase and electric current current potential, and the output phase difference is to said CPU; Said CPU is connected with external main frame, is used to the operating frequency of the standard of obtaining, and obtains the standard operation parameter according to the operating frequency of said standard, compares with said phase difference value, according to comparison result described motor, impedance transformer is made fine setting.
Highly preferred, said CPU comprises memory cell, and said cell stores standard parameter value after said CPU obtains the standard frequency value, judges whether said memory cell has the standard parameter value of corresponding frequencies, if then call this standard value; If not, then seek standard parameter value under the frequency values the most close with said standard frequency value.Wherein, said standard parameter value comprises the parameter of electric machine, impedance conversion parameter or variable inductance parameter.
See also Fig. 4, the concrete workflow of said antenna tuner is:
After the start; The operating frequency of host setting is informed CPU through serial ports, antenna tuner just according to this Automatic Frequency call in program stored (mainly comprising the gear of relay under this Frequency point, the angle of motor), the selective relay gear is realized impedance matching; The fast driving motor reaches predetermined angular; The rotation of motor drives variable inductor, the capacitive reactance of compensation antenna, realize tuning (tuning period t＜＜1s).CPU is the program stored data, confirm (being used for confirming angle by encoder) by the debugging in early stage.
After prevision good relay gear of program setting and motor angle, through detection (comprising the detection of phase difference size and symbol), judge whether to reach tuning state once more again to sampling voltage and sampling current phase difference, finely tune according to circumstances.This situation is called can remember the automatic tuning mode.
If the frequency of host setting, day transfer the routine data of not storing this Frequency point among the CPU, day transfer then that the automatic detection of CPU stored with the immediate Frequency point of this frequency, by this Frequency point set relay and motor angle (time t0＜＜1s).Carry out tuningly then according to tuning criterion, finally make day to transfer to reach tuning state.Suppose that stepping motor is that per minute 600 changes, then rotating all used time is 100ms, tuning rotation time t1＜0.1s.With the 86BYG250A motor is example, and it has 50 teeth, and the synchronizing step angle is 1.8 °; If with 40 segmentations; Rotate then that to need umber of pulse a week be (360 ° ÷ 1.8 °) * 40=8000, again if the driving pulse frequency is made as f=10kHz, then tuning rotation time t1≤0.8s＜1s.According to actual conditions, can be that tuning one side is detected on one side, up to reaching tuning state, total tuning period can satisfy t≤3s.This situation is called non-memory automatic tuning mode.
If motor rotates a week and does not find tuning point, then adjust relay automatically and change a gear up or down, drive motors rotates then, detects tuning criterion simultaneously, judges whether a day accent reaches tuning state.If still do not reach tuning state, the sound that then gives a warning, manual tuning is carried out in prompting.This situation is not counted in the automatic tuning time.
See also Fig. 4, Fig. 4 is the structure chart of a kind of antenna tuning system provided by the invention, comprises sample circuit, Tuning Control circuit, impedance transformer, motor, variable inductance, inductance; Said sample circuit is serially connected with between external transmitter and the impedance transformer, is used to obtain the electric current of input signal and the comparison of signal phase of magnitude of voltage, and exports said comparison of signal phase difference to the Tuning Control circuit and be used for measure phase difference; Said Tuning Control circuit is set said impedance transformer and said inductance according to said operating frequency phase difference, and said variable inductance is set through said motor according to said phase difference; Input signal is sent to impedance transformer through sample circuit, is transferred to variable inductance through impedance transformer again, and signal is through behind the variable inductance, again through being inductively coupled on the external antenna.
Further, said sample circuit comprise the current sampling unit, the electric current square wave conversion unit that is connected with the current sampling unit, voltage sampling unit, the voltage square wave converter unit that is connected with the voltage sampling unit; Said current sampling unit is connected to external transmitter, and input signal is carried out current sampling, and the output sampling current carries out the electric current square wave conversion to electric current square wave conversion unit; Said voltage sampling unit is connected to said current sampling unit, and input signal is carried out voltage sampling, and the output sampling voltage is carried out the voltage square wave conversion to the voltage square wave converter unit; Said electric current square wave conversion unit, voltage square wave converter unit all are connected with said Tuning Control circuit.
Further, said Tuning Control circuit comprises detected phase difference unit, CPU;
Said detected phase difference unit receives the voltage-phase from the voltage square wave converter unit, and receives the current phase from electric current square wave conversion unit, and the difference of more said voltage-phase and current phase, and the output phase difference is to said CPU; Said CPU is connected with external main frame, is used to the operating frequency of the standard of obtaining, and obtains the standard operation parameter according to the operating frequency of said standard, compares with said phase difference value, according to comparison result described motor, impedance transformer is made fine setting.
Further, said CPU comprises memory cell, and said cell stores standard parameter value after said CPU obtains the standard frequency value, judges whether said memory cell has the standard parameter value of corresponding frequencies, if then call this standard value; If not, then seek standard parameter value under the frequency values the most close with said standard frequency value.The embodiment of said antenna tuning system is the same with the execution mode of above-mentioned antenna tuner, and this is not done and gives unnecessary details.
The above is merely embodiments of the invention; Be not so limit claim of the present invention; Every equivalent structure or equivalent flow process conversion that utilizes specification of the present invention and accompanying drawing content to be done; Or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present invention.
Claims (10)
1. an antenna tuner is characterized in that: comprise sample circuit, Tuning Control circuit, impedance transformer, motor, variable inductance, inductance;
Said sample circuit is serially connected with between external transmitter and the impedance transformer, is used to obtain the electric current of input signal and the comparison of signal phase of magnitude of voltage, and exports said comparison of signal phase difference to the Tuning Control circuit and be used for measure phase difference; Said Tuning Control circuit is set said impedance transformer and said inductance according to said operating frequency phase difference, and said variable inductance is set through said motor according to said phase difference;
Input signal is sent to impedance transformer through sample circuit, is transferred to variable inductance through impedance transformer again, and signal is through behind the variable inductance, again through being inductively coupled on the external antenna.
2. antenna tuner according to claim 1 is characterized in that: the electric current square wave conversion unit that said sample circuit comprises the current sampling unit, be connected with the current sampling unit, voltage sampling unit, the voltage square wave converter unit that is connected with the voltage sampling unit;
Said current sampling unit is connected to external transmitter, and input signal is carried out current sampling, and the output sampling current carries out the electric current square wave conversion to electric current square wave conversion unit;
Said voltage sampling unit is connected to said current sampling unit, and input signal is carried out voltage sampling, and the output sampling voltage is carried out the voltage square wave conversion to the voltage square wave converter unit;
Said electric current square wave conversion unit, voltage square wave converter unit all are connected with said Tuning Control circuit.
3. antenna tuner according to claim 1 is characterized in that: also comprise the antenna current table, said antenna current table is connected with the output of said impedance transformer.
4. antenna tuner according to claim 2 is characterized in that: said Tuning Control circuit comprises detected phase difference unit, CPU;
Said detected phase difference unit receives the voltage-phase from the voltage square wave converter unit, and receives the current phase from electric current square wave conversion unit, and the difference of more said voltage-phase and current phase, and the output phase difference is to said CPU;
Said CPU is connected with external main frame, is used to the operating frequency of the standard of obtaining, and obtains the standard operation parameter according to the operating frequency of said standard, compares with said phase difference value, according to comparison result described motor, impedance transformer is made fine setting.
5. antenna tuner according to claim 4 is characterized in that: said CPU comprises memory cell, said cell stores standard parameter value; After said CPU obtains the standard frequency value; Judge whether said memory cell has the standard parameter value of corresponding frequencies, if then call this standard value; If not, then seek standard parameter value under the frequency values the most close with said standard frequency value.
6. antenna tuner according to claim 4 is characterized in that: said standard parameter value comprises the parameter of electric machine, impedance conversion parameter or variable inductance parameter.
7. an antenna tuning system is characterized in that: comprise transmitter, main frame, antenna tuner, antenna; Said transmitter, main frame, antenna all are connected with said antenna tuner;
Said transmitter is used for to said antenna tuner emission input signal;
Said main frame is used for sending the standard frequency value to antenna tuner;
Said antenna tuner comprises sample circuit, Tuning Control circuit, impedance transformer, motor, variable inductance, inductance; Said sample circuit is serially connected with between external transmitter and the impedance transformer, is used to obtain the electric current of input signal and the comparison of signal phase of magnitude of voltage, and exports said comparison of signal phase difference to the Tuning Control circuit and be used for measure phase difference; Said Tuning Control circuit is set said impedance transformer and said inductance according to said operating frequency phase difference, and said variable inductance is set through said motor according to said phase difference; Input signal is sent to impedance transformer through sample circuit, is transferred to variable inductance through impedance transformer again, and signal is through behind the variable inductance, again through being inductively coupled on the external antenna.
8. antenna tuning system according to claim 7 is characterized in that:
The electric current square wave conversion unit that said sample circuit comprises the current sampling unit, be connected with the current sampling unit, voltage sampling unit, the voltage square wave converter unit that is connected with the voltage sampling unit;
Said current sampling unit is connected to external transmitter, and input signal is carried out current sampling, and the output sampling current carries out the electric current square wave conversion to electric current square wave conversion unit;
Said voltage sampling unit is connected to said current sampling unit, and input signal is carried out voltage sampling, and the output sampling voltage is carried out the voltage square wave conversion to the voltage square wave converter unit;
Said electric current square wave conversion unit, voltage square wave converter unit all are connected with said Tuning Control circuit.
9. antenna tuning system according to claim 8 is characterized in that: said Tuning Control circuit comprises detected phase difference unit, CPU;
Said detected phase difference unit receives the voltage-phase from the voltage square wave converter unit, and receives the current phase from electric current square wave conversion unit, and the difference of more said voltage-phase and current phase, and the output phase difference is to said CPU;
Said CPU is connected with external main frame, is used to the operating frequency of the standard of obtaining, and obtains the standard operation parameter according to the operating frequency of said standard, compares with said phase difference value, according to comparison result described motor, impedance transformer is made fine setting.
10. antenna tuning system according to claim 8; It is characterized in that: said CPU comprises memory cell; Said cell stores standard parameter value after said CPU obtains the standard frequency value, judges whether said memory cell has the standard parameter value of corresponding frequencies; If then call this standard value; If not, then seek standard parameter value under the frequency values the most close with said standard frequency value.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103560593A (en) * | 2013-11-07 | 2014-02-05 | 重庆大学 | Electric field coupled power transfer system and control method based on novel topology |
| CN104577327A (en) * | 2014-12-29 | 2015-04-29 | 陕西烽火电子股份有限公司 | Integrated vehicle-mounted antenna feed system |
| CN107911181A (en) * | 2017-12-29 | 2018-04-13 | 陕西烽火电子股份有限公司 | A kind of system and method for detecting automatic antenna tuner network failure |
| CN110444892A (en) * | 2019-08-12 | 2019-11-12 | 宜确半导体（苏州）有限公司 | Antenna tuner and its manufacturing method, antenna tuning system |
| CN110572168A (en) * | 2019-09-20 | 2019-12-13 | 北京北广科技股份有限公司 | series resonance loop of high-power long-wavelength transmitting system and automatic tuning method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101197580A (en) * | 2006-12-06 | 2008-06-11 | 联想移动通信科技有限公司 | Impedance matching and processing equipment and method thereof |
-
2011
- 2011-12-05 CN CN201110400134.9A patent/CN102545936B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101197580A (en) * | 2006-12-06 | 2008-06-11 | 联想移动通信科技有限公司 | Impedance matching and processing equipment and method thereof |
Non-Patent Citations (3)
| Title |
|---|
| 李引凡: "天线调谐器阻抗匹配网络与调谐算法研究", 《中国优秀硕士学位论文全文数据库 信息科技辑》, no. 12, 15 December 2009 (2009-12-15), pages 6 - 20 * |
| 耿大勇: "磁饱和式可控电抗器的恒功率因数控制在动态无功补偿中的应用", 《变压器》, vol. 46, no. 12, 31 December 2009 (2009-12-31), pages 17 * |
| 赵新山: "用李沙育图形法调整中波天线匹配网络", 《广播与电视技术》, no. 5, 28 October 1993 (1993-10-28), pages 28 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103560593A (en) * | 2013-11-07 | 2014-02-05 | 重庆大学 | Electric field coupled power transfer system and control method based on novel topology |
| CN104577327A (en) * | 2014-12-29 | 2015-04-29 | 陕西烽火电子股份有限公司 | Integrated vehicle-mounted antenna feed system |
| CN104577327B (en) * | 2014-12-29 | 2018-02-06 | 陕西烽火电子股份有限公司 | Integrated vehicle antenna-feedback system |
| CN107911181A (en) * | 2017-12-29 | 2018-04-13 | 陕西烽火电子股份有限公司 | A kind of system and method for detecting automatic antenna tuner network failure |
| CN110444892A (en) * | 2019-08-12 | 2019-11-12 | 宜确半导体（苏州）有限公司 | Antenna tuner and its manufacturing method, antenna tuning system |
| CN110572168A (en) * | 2019-09-20 | 2019-12-13 | 北京北广科技股份有限公司 | series resonance loop of high-power long-wavelength transmitting system and automatic tuning method thereof |
| CN110572168B (en) * | 2019-09-20 | 2021-12-28 | 北京北广科技股份有限公司 | Series resonance loop of high-power long-wavelength transmitting system and automatic tuning method thereof |
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