CN102545936B - Antenna tuner and antenna tuning system - Google Patents
Antenna tuner and antenna tuning system Download PDFInfo
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- CN102545936B CN102545936B CN201110400134.9A CN201110400134A CN102545936B CN 102545936 B CN102545936 B CN 102545936B CN 201110400134 A CN201110400134 A CN 201110400134A CN 102545936 B CN102545936 B CN 102545936B
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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 a kind of antenna tuning field, especially relate to a kind of antenna tuner and antenna tuning system.
Background technology
One of key technology that antenna automatic tuning technology is, existing antenna tuner adopts the tuning manner as independent comparison impedance mostly.Do not carry out tuning according to phase difference value to the parameters of antenna, so tuning effect is accurate not, and when antenna tuner does not have memory tuning parameter, antenna tuner search for regard to needs required for parameter, tuning period also just increases.
Summary of the invention
The technical problem that the present invention solves provides a kind of antenna tuner and antenna tuning system, can solve the tuning accurate not of current antenna tuner, the problem that tuning period is long.
For solving the problems of the technologies described above, the technical solution used in the present invention is to provide a kind of antenna tuner, comprises sample circuit, Tuning Control circuit, impedance transformer, motor, variable inductance, inductance; Described sample circuit is serially connected with between external transmitter and impedance transformer, for the comparison of signal phase of the electric current and magnitude of voltage that obtain input signal, and exports described comparison of signal phase difference to Tuning Control circuit and is used for measure phase difference; Described Tuning Control circuit sets described impedance transformer and described inductance according to described operating frequency phase difference, and is set described variable inductance by described motor according to described phase difference; Input signal is sent to impedance transformer by sample circuit, then is transferred to variable inductance by impedance transformer, signal after variable inductance, then by being inductively coupled on external antenna.
Wherein, described sample circuit comprises current sampling unit, the current square wave converter unit be connected with current sampling unit, voltage sampling unit, the voltage square wave converter unit that is connected with voltage sampling unit; Described current sampling unit is connected to external transmitter, carries out current sampling to input signal, and exports sampling current and carry out current square wave conversion to current square wave converter unit; Described voltage sampling unit is connected to described current sampling unit, carries out voltage sampling to input signal, and exports sampling voltage and carry out voltage square wave conversion to voltage square wave converter unit; Described current square wave converter unit, voltage square wave converter unit are all connected with described Tuning Control circuit.
Wherein, also comprise antenna current table, described antenna current table is connected with the output of described impedance transformer.
Wherein, described Tuning Control circuit comprises detected phase difference unit, CPU; Described detected phase difference unit receives the voltage-phase from voltage square wave converter unit, and receives the current phase from current square wave converter unit, and the difference of more described voltage-phase and current phase, and phase difference output value is to described CPU; Described CPU is connected with external main frame, for obtaining the operating frequency of standard, and obtaining standard operation parameter according to the operating frequency of described standard, comparing, make fine setting according to comparison result to described motor, impedance transformer with described phase difference value.
Wherein, described CPU comprises memory cell, described cell stores standard parameter value, and described CPU judges whether described memory cell has the standard parameter value of corresponding frequencies, if so, then calls this standard value after obtaining standard frequency value; If not, then the standard parameter value under the frequency values the most close with described standard frequency value is found.
Wherein, described standard parameter value comprises the parameter of electric machine, impedance transformation 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; Described transmitter, main frame, antenna are all connected with described antenna tuner; Described transmitter is used for launching input signal to described antenna tuner; Described main frame is used for sending standard frequency value to antenna tuner; Described antenna tuner comprises sample circuit, Tuning Control circuit, impedance transformer, motor, variable inductance, inductance; Described sample circuit is serially connected with between external transmitter and impedance transformer, for the comparison of signal phase of the electric current and magnitude of voltage that obtain input signal, and exports described comparison of signal phase difference to Tuning Control circuit and is used for measure phase difference; Described Tuning Control circuit sets described impedance transformer and described inductance according to described operating frequency phase difference, and is set described variable inductance by described motor according to described phase difference; Input signal is sent to impedance transformer by sample circuit, then is transferred to variable inductance by impedance transformer, signal after variable inductance, then by being inductively coupled on external antenna.
Wherein, described sample circuit comprises current sampling unit, the current square wave converter unit be connected with current sampling unit, voltage sampling unit, the voltage square wave converter unit that is connected with voltage sampling unit; Described current sampling unit is connected to external transmitter, carries out current sampling to input signal, and exports sampling current and carry out current square wave conversion to current square wave converter unit; Described voltage sampling unit is connected to described current sampling unit, carries out voltage sampling to input signal, and exports sampling voltage and carry out voltage square wave conversion to voltage square wave converter unit; Described current square wave converter unit, voltage square wave converter unit are all connected with described Tuning Control circuit.
Wherein, described Tuning Control circuit comprises detected phase difference unit, CPU; Described detected phase difference unit receives the voltage-phase from voltage square wave converter unit, and receives the current phase from current square wave converter unit, and the difference of more described voltage-phase and current phase, and phase difference output value is to described CPU; Described CPU is connected with external main frame, for obtaining the operating frequency of standard, and obtaining standard operation parameter according to the operating frequency of described standard, comparing, make fine setting according to comparison result to described motor, impedance transformer with described phase difference value.
Wherein, described CPU comprises memory cell, described cell stores standard parameter value, and described CPU judges whether described memory cell has the standard parameter value of corresponding frequencies, if so, then calls this standard value after obtaining standard frequency value; If not, then the standard parameter value under the frequency values the most close with described standard frequency value is found.
Adopt technique scheme, in contrast prior art, antenna tuner is tuning accurate not, the problem that tuning period is long, the invention has the beneficial effects as follows: the voltage and current phase place of sample circuit to input signal samples, Tuning Control circuit is analyzed phase difference value, the resistance value of control group converter, and control the rotating speed of motor, thus control the capacitance of variable inductance, this makes it possible in real time according to the situation of current input signal, the equipment of antenna tuner inside is adjusted, to reach best tuning effect, adopt phase difference value as the benchmark of adjustment, make tuning efficiency higher.
Accompanying drawing explanation
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 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 describing technology contents of the present invention, structural feature in detail, realized object and effect, accompanying drawing is coordinated to be explained in detail below in conjunction with execution mode.
Refer to Fig. 1, the invention provides a kind of antenna tuner, comprise sample circuit, Tuning Control circuit, impedance transformer, motor, variable inductance, inductance; Described sample circuit is serially connected with between external transmitter and impedance transformer, for the comparison of signal phase of the electric current and magnitude of voltage that obtain input signal, and exports described comparison of signal phase difference to Tuning Control circuit and is used for measure phase difference; Described Tuning Control circuit sets described impedance transformer and described inductance according to described operating frequency phase difference, and is set described variable inductance by described motor according to described phase difference; Input signal is sent to impedance transformer by sample circuit, then is transferred to variable inductance by impedance transformer, signal after variable inductance, then by being inductively coupled on external antenna.
Refer to Fig. 2, Fig. 2 is a specific embodiment of a kind of antenna tuner provided by the invention, in the present embodiment, be improved to further: described sample circuit comprises current sampling unit, the current square wave converter unit be connected with current sampling unit, voltage sampling unit, the voltage square wave converter unit that is connected with voltage sampling unit; Described current sampling unit is connected to external transmitter, carries out current sampling to input signal, and exports sampling current and carry out current square wave conversion to current square wave converter unit; Described voltage sampling unit is connected to described current sampling unit, carries out voltage sampling to input signal, and exports sampling voltage and carry out voltage square wave conversion to voltage square wave converter unit; Described current square wave converter unit, voltage square wave converter unit are all connected with described Tuning Control circuit.
Further, the present invention also comprises antenna current table, and described antenna current table is connected with the output of described impedance transformer.
Refer to Fig. 3, further, described Tuning Control circuit comprises detected phase difference unit, CPU;
Described detected phase difference unit receives the voltage-phase from voltage square wave conversion, and receives the current phase from current square wave converter unit, and the difference of more described voltage-phase and current level, and phase difference output value is to described CPU; Described CPU is connected with external main frame, for obtaining the operating frequency of standard, and obtaining standard operation parameter according to the operating frequency of described standard, comparing, make fine setting according to comparison result to described motor, impedance transformer with described phase difference value.
Highly preferred, described CPU comprises memory cell, described cell stores standard parameter value, and described CPU judges whether described memory cell has the standard parameter value of corresponding frequencies, if so, then calls this standard value after obtaining standard frequency value; If not, then the standard parameter value under the frequency values the most close with described standard frequency value is found.Wherein, described standard parameter value comprises the parameter of electric machine, impedance transformation parameter or variable inductance parameter.
Refer to Fig. 4, the specific works flow process of described antenna tuner is:
After start, the operating frequency of host setting informs CPU by serial ports, antenna tuner just according to this frequency automatically call in the program (mainly comprise this Frequency point under the gear of relay, the angle of motor) stored, selective relay gear realizes impedance matching, fast driving motor reaches predetermined angular, the rotation of motor drives variable inductor, compensates the capacitive reactance of antenna, realizes tuning (tuning period t < < 1s).The routine data that CPU has stored, is determined (being used for determining angle by encoder) by debugging in early stage.
After the precognition good relay gear of program setting and motor angle, then by the detection (comprising the detection of phase difference size and symbol) to sampling voltage and sampling current phase difference, again judge whether to reach tuning state, optionally finely tune.This situation is called can remember automatic tuning mode.
If the frequency of host setting, it adjusts the routine data not storing this Frequency point in CPU, then sky adjusts CPU automatically to detect the Frequency point immediate with this frequency stored, by this Frequency point setting relay and motor angle (time t0 < < 1s).Then carry out tuning according to tuning criterion, finally make sky adjust and reach tuning state.Assuming that stepping motor is 600 turns per minute, then rotating one week time used is 100ms, tuning rotation time t1 < 0.1s.For 86BYG250A motor, it has 50 teeth, synchronizing step angle is 1.8 °, if with 40 segmentations, then rotating one week needs umber of pulse is (360 ° ÷ 1.8 °) × 40=8000, if driving pulse frequency is set to f=10kHz again, then tuning rotation time t1≤0.8s < 1s.According to actual conditions, can be tuning while detect, until reach tuning state, total tuning period can meet t≤3s.This situation is called non-memory automatic tuning mode.
If electric machine rotation does not find tuning point in one week, then automatically adjust relay and change a gear up or down, then drive motors rotates, and detects tuning criterion simultaneously, judges sky adjusts whether reach tuning state.If still do not reach tuning state, then give a warning, manual tuning is carried out in prompting.This situation is not counted in the automatic tuning time.
Refer to 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; Described sample circuit is serially connected with between external transmitter and impedance transformer, for the comparison of signal phase of the electric current and magnitude of voltage that obtain input signal, and exports described comparison of signal phase difference to Tuning Control circuit and is used for measure phase difference; Described Tuning Control circuit sets described impedance transformer and described inductance according to described operating frequency phase difference, and is set described variable inductance by described motor according to described phase difference; Input signal is sent to impedance transformer by sample circuit, then is transferred to variable inductance by impedance transformer, signal after variable inductance, then by being inductively coupled on external antenna.
Further, described sample circuit comprises current sampling unit, the current square wave converter unit be connected with current sampling unit, voltage sampling unit, the voltage square wave converter unit that is connected with voltage sampling unit; Described current sampling unit is connected to external transmitter, carries out current sampling to input signal, and exports sampling current and carry out current square wave conversion to current square wave converter unit; Described voltage sampling unit is connected to described current sampling unit, carries out voltage sampling to input signal, and exports sampling voltage and carry out voltage square wave conversion to voltage square wave converter unit; Described current square wave converter unit, voltage square wave converter unit are all connected with described Tuning Control circuit.
Further, described Tuning Control circuit comprises detected phase difference unit, CPU;
Described detected phase difference unit receives the voltage-phase from voltage square wave converter unit, and receives the current phase from current square wave converter unit, and the difference of more described voltage-phase and current phase, and phase difference output value is to described CPU; Described CPU is connected with external main frame, for obtaining the operating frequency of standard, and obtaining standard operation parameter according to the operating frequency of described standard, comparing, make fine setting according to comparison result to described motor, impedance transformer with described phase difference value.
Further, described CPU comprises memory cell, described cell stores standard parameter value, and described CPU judges whether described memory cell has the standard parameter value of corresponding frequencies, if so, then calls this standard value after obtaining standard frequency value; If not, then the standard parameter value under the frequency values the most close with described standard frequency value is found.The embodiment of described antenna tuning system is the same with the execution mode of above-mentioned antenna tuner, and this does not repeat.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize specification of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (6)
1. an antenna tuner, is characterized in that: comprise sample circuit, Tuning Control circuit, impedance transformer, motor, variable inductance, inductance;
Described sample circuit is serially connected with between external transmitter and impedance transformer, for the comparison of signal phase of the electric current and magnitude of voltage that obtain input signal, and exports described comparison of signal phase difference to Tuning Control circuit and is used for measure phase difference; Described Tuning Control circuit sets described impedance transformer and described inductance according to described operating frequency phase difference, and is set described variable inductance by described motor according to described phase difference;
Input signal is sent to impedance transformer by sample circuit, then is transferred to variable inductance by impedance transformer, signal after variable inductance, then by being inductively coupled on external antenna;
Described Tuning Control circuit comprises detected phase difference unit, CPU;
Described detected phase difference unit receives the voltage-phase from voltage square wave converter unit, and receives the current phase from current square wave converter unit, and the difference of more described voltage-phase and current phase, and phase difference output value is to described CPU;
Described CPU is connected with external main frame, for obtaining the operating frequency of standard, and obtaining standard operation parameter according to the operating frequency of described standard, comparing, make fine setting according to comparison result to described motor, impedance transformer with described phase difference value;
Described CPU comprises memory cell, described cell stores standard parameter value, and described CPU judges whether described memory cell has the standard parameter value of corresponding frequencies, if so, then calls this standard value after obtaining standard frequency value; If not, then the standard parameter value under the frequency values the most close with described standard frequency value is found;
If electric machine rotation does not find tuning point in one week, then automatically adjust relay and change a gear up or down, then drive motors rotates, and detects tuning criterion simultaneously, judges sky adjusts whether reach tuning state.
2. antenna tuner according to claim 1, is characterized in that: described sample circuit comprises current sampling unit, the current square wave converter unit be connected with current sampling unit, voltage sampling unit, the voltage square wave converter unit that is connected with voltage sampling unit;
Described current sampling unit is connected to external transmitter, carries out current sampling to input signal, and exports sampling current and carry out current square wave conversion to current square wave converter unit;
Described voltage sampling unit is connected to described current sampling unit, carries out voltage sampling to input signal, and exports sampling voltage and carry out voltage square wave conversion to voltage square wave converter unit;
Described current square wave converter unit, voltage square wave converter unit are all connected with described Tuning Control circuit.
3. antenna tuner according to claim 1, is characterized in that: also comprise antenna current table, and described antenna current table is connected with the output of described impedance transformer.
4. antenna tuner according to claim 1, is characterized in that: described standard parameter value comprises the parameter of electric machine, impedance transformation parameter or variable inductance parameter.
5. an antenna tuning system, is characterized in that: comprise transmitter, main frame, antenna tuner, antenna; Described transmitter, main frame, antenna are all connected with described antenna tuner;
Described transmitter is used for launching input signal to described antenna tuner;
Described main frame is used for sending standard frequency value to antenna tuner;
Described antenna tuner comprises sample circuit, Tuning Control circuit, impedance transformer, motor, variable inductance, inductance; Described sample circuit is serially connected with between external transmitter and impedance transformer, for the comparison of signal phase of the electric current and magnitude of voltage that obtain input signal, and exports described comparison of signal phase difference to Tuning Control circuit and is used for measure phase difference; Described Tuning Control circuit sets described impedance transformer and described inductance according to described operating frequency phase difference, and is set described variable inductance by described motor according to described phase difference; Input signal is sent to impedance transformer by sample circuit, then is transferred to variable inductance by impedance transformer, signal after variable inductance, then by being inductively coupled on external antenna;
Described Tuning Control circuit comprises detected phase difference unit, CPU;
Described detected phase difference unit receives the voltage-phase from voltage square wave converter unit, and receives the current phase from current square wave converter unit, and the difference of more described voltage-phase and current phase, and phase difference output value is to described CPU;
Described CPU is connected with external main frame, for obtaining the operating frequency of standard, and obtaining standard operation parameter according to the operating frequency of described standard, comparing, make fine setting according to comparison result to described motor, impedance transformer with described phase difference value;
Described CPU comprises memory cell, described cell stores standard parameter value, and described CPU judges whether described memory cell has the standard parameter value of corresponding frequencies, if so, then calls this standard value after obtaining standard frequency value; If not, then the standard parameter value under the frequency values the most close with described standard frequency value is found;
If electric machine rotation does not find tuning point in one week, then automatically adjust relay and change a gear up or down, then drive motors rotates, and detects tuning criterion simultaneously, judges sky adjusts whether reach tuning state.
6. antenna tuning system according to claim 5, is characterized in that:
Described sample circuit comprises current sampling unit, the current square wave converter unit be connected with current sampling unit, voltage sampling unit, the voltage square wave converter unit that is connected with voltage sampling unit;
Described current sampling unit is connected to external transmitter, carries out current sampling to input signal, and exports sampling current and carry out current square wave conversion to current square wave converter unit;
Described voltage sampling unit is connected to described current sampling unit, carries out voltage sampling to input signal, and exports sampling voltage and carry out voltage square wave conversion to voltage square wave converter unit;
Described current square wave converter unit, voltage square wave converter unit are all connected with described Tuning Control circuit.
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| CN201110400134.9A CN102545936B (en) | 2011-12-05 | 2011-12-05 | Antenna tuner and antenna tuning system |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103560593B (en) * | 2013-11-07 | 2015-09-30 | 重庆大学 | A kind of control method of field coupled type radio energy transmission 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 |
| 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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