CN103346752B - A kind of YIG tuned filter of revising in real time scans tuning nonlinear device - Google Patents
A kind of YIG tuned filter of revising in real time scans tuning nonlinear device Download PDFInfo
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- CN103346752B CN103346752B CN201310279584.6A CN201310279584A CN103346752B CN 103346752 B CN103346752 B CN 103346752B CN 201310279584 A CN201310279584 A CN 201310279584A CN 103346752 B CN103346752 B CN 103346752B
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Abstract
A kind of revise the tuning nonlinear device of YIG tuned filter scanning in real time, comprise YIG tuned filter (YTF), be connected to the YTF real time calibration source part of YIG tuned filter and YTF tune drive and compensated part.Each frequency can be made to have the tuning offset of independent scanning, and compensate meticulousr, the rapid scanning being conducive to YTF is tuning.And the present invention can revise in real time and calibrate, overcome variation of ambient temperature and the impact of the factor such as YTF is aging.
Description
Technical field
The present invention relates to a kind of YIG tuned filter of revising in real time and scan tuning nonlinear device.
Background technology
YIG tuned filter (YttriumIronGarnetTuneFilter, be called for short YTF) is that centre frequency can the band pass filter of electric tuning, is the YIG device making tuned cell with YIG bead.Signal is mixing again after YTF filtering, greatly can reduce the amplitude of the image signal produced in optical mixing process, also can improve harmonic distortion index.Therefore, YTF applies generally in microwave and millimeter wave Signal reception, analysis classes equipment.
Under the driving of outside direct current, YTF inside produces tuning magnetic field, and magnetic fields produces corresponding tuned frequency in YIG bead.Between YTF tuned frequency and drive current, relation tuning sensitivity characterizes, and unit is generally MHz/mA.The preset tuning of YTF is completed usually under a frequency state, now substantially linear between YTF resonance frequency and drive current.But under frequency sweep state, it is tuning non-linear to there is scanning in YTF, namely when given identical motivation value, frequency sweep state be tuned to frequency values and point frequently state there is certain deviation, and this scanning is tuning non-linear relevant with the rate of change (sweeping wide/sweep time) of values for tuning: tuning rate of change is faster, and frequency error is larger; Tuning rate of change is less, and tuned frequency is points of proximity value frequently more.For identical driving values for tuning, YTF point frequency state tuned frequency curve and frequency sweep state tuned frequency curve comparison are as shown in Figure 1.In figure, for some frequency state frequency tuning curve, (centre frequency is f to solid line
0), dotted line is the frequency tuning curves (f under difference sweeps speed
1for sweeping the slower frequency tuning curves of speed; f
2for sweeping the very fast frequency tuning curves of speed).As shown in Figure 2, visible curve has obvious high order component to the scanning tuning voltage nonlinear curve of YTF, the most obvious in the initial segment nonlinear characteristic starting scanning.
When sweep speed is slower, the tuned frequency due to YTF departs from less, and tuning non-linear usually needs of scanning now compensates.But needing the occasion of rapid scanning, scanning for YTF is tuning non-linear, then need to compensate (such as shown in Fig. 1, in the YTF tuned frequency difference of rapid scanning state and the point frequently same frequency of state more than YTF bandwidth range), otherwise can limit YTF tuned speed and after affecting filtering to the amplitude measurement of signal.
In addition, YTF is also by the impact of magnetic hysteresis, the temperature characteristic such as drift and the factor such as aging.The temperature drift characteristic of YTF refers to when tuning current is constant, varies with temperature its tuned frequency and certain drift can occur.Along with the lengthening of operating time, YTF can occur aging, and its tuning sensitivity also changes.
Therefore, consider the impact of the drift of YTF temperature and the factor such as aging, it is more complicated and difficult that it scans tuning compensation of nonlinearity.Therefore need a kind of method or technology to revise YTF in real time and scan tuning nonlinear impact.
Summary of the invention
The invention provides a kind of YIG tuned filter of revising in real time and scan tuning nonlinear device, comprise YIG tuned filter (YTF), be connected to the YTF real time calibration source part of YIG tuned filter and YTF tune drive and compensated part, it is characterized in that, YTF real time calibration source part comprises comb generator and diverter switch, the comb wave signal that input signal and comb generator produce is connected to YIG tuned filter by diverter switch, there is provided inner comb wave to calibrate switched path, complete YTF and scan tuning nonlinear real time calibration and correction, YTF tune drive and compensated part comprise a frequency threshold logic unit, synchronised clock and control logic unit, scan non-linearity compensating unit, degaussing circuit and baric flow translation circuit, preset input is connected to baric flow translation circuit by a frequency threshold logic unit, compensate input and be connected to a frequency threshold logic unit by scan non-linearity compensating unit, synchronised clock and control logic unit are used for a frequency threshold logic unit, scan non-linearity compensating unit and degaussing circuit provide clock and control signal, degaussing circuit is connected to baric flow translation circuit, the realization of baric flow translation circuit is to the tune drive of YTF and scan non-linearity correction-compensation.
According to an aspect of the present invention, described comb generator produces the comb wave calibrating signal covering whole YTF working frequency range, and the path that described diverter switch carries out input signal or comb wave calibrating signal is selected.
According to an aspect of the present invention, described the humorous logical block of frequency modulation comprises the first counter, data accumulator, the first address accumulator, data RAM and the first digital analog converter, wherein said preset input is connected to the first digital analog converter by the first counter, data accumulator, and the first address accumulator is connected to the first digital analog converter by data RAM.Described first counter and data accumulator complete the initial preset of ideal situation, and described first address accumulator and data RAM complete refinement to each frequency driving data and oblique line matching.
According to a further aspect of the invention, described scan non-linearity compensating unit comprises linear fit RAM and the second counter, the second address accumulator, slope RAM and the 3rd counter, exports accumulator and the second digital simulation converter, wherein said compensation input by linear fit RAM and the second counter, the second address accumulator, slope RAM and the 3rd counter, export accumulator and be connected to the second digital simulation converter.The output of described second simulation converter and described first digital simulation converter, with reference to suing for peace, reach the effect that YTF scans tuning curve linear fit.
According to a further aspect of the invention, described degaussing circuit, for compensating the hysteresis characteristic of YTF, joins when each flyback in the driving of YTF, then disconnects after trace scanning starts.Described baric flow translation circuit is used for the output voltage of the first digital simulation converter to carry out filtering, amplification and conditioning, completes baric flow conversion, realizes the tune drive of YTF.
These feature and advantage of the present invention also have other characteristic sum improvement to become more obvious by description below, accompanying drawing and claim.
Accompanying drawing illustrates:
Fig. 1 describes for identical driving values for tuning, the comparison diagram of YTF point frequency state tuned frequency curve and frequency sweep state tuned frequency curve.
Fig. 2 describes the scanning tuning voltage nonlinear curve figure of YTF.
Fig. 3 describes the connection block diagram of the real-time correcting device of the present invention.
Embodiment
It is scan tuning nonlinear curve according to YTF that YTF of the present invention scans tuning non-liner revision thinking, is reached the effect of linear goal programming by the slope adjusting preset DAC in real time; And the adjustment of preset DAC slope realizes by increasing an other road scan non-linearity correction circuit.Be different from the tuning compensation method of scanning adding same bias in large band limits generally adopted at present, the present invention can make each frequency have the tuning offset of independent scanning, and compensate more accurate and effective, the rapid scanning being more conducive to YTF is tuning.
As Fig. 3, real-time correcting device comprises YTF real time calibration source part (comprising comb generator 1 and diverter switch 2) and YTF tune drive and compensated part and (comprises counter 3, data accumulator 4, address accumulator 5, data RAM 6, DAC
17, synchronous logic and control logic unit 8, linear fit RAM and counter 9, address accumulator 10, slope RAM and counter 11, export accumulator 12, DAC
213, degaussing circuit 14, baric flow translation circuit 15).
Wherein, the comb wave signal that input signal and comb generator 1 produce is connected to YIG tuned filter by diverter switch 2, provides inner comb wave to calibrate switched path, completes YTF and scans tuning nonlinear real time calibration and correction.
YTF tune drive and compensated part comprise some frequency threshold logic unit, synchronised clock and a control logic unit 8, scan non-linearity compensating unit, degaussing circuit 14 and baric flow translation circuit 15.
The humorous logical block of some frequency modulation comprises counter 3, data accumulator 4, address accumulator 5, data RAM 6 and DAC
17, complete humorous preset of YTF point frequency modulation.Counter 3 and data accumulator 4 complete the initial preset of ideal situation, and address accumulator 5 and data RAM 6 complete refinement to each frequency driving data and oblique line matching.
Scan non-linearity compensating unit comprises linear fit RAM and counter 9, address accumulator 10, slope RAM and counter 11, exports accumulator 12 and DAC
213, complete YTF and scan tuning compensation of nonlinearity correction.Corresponding different scanning tuned speed, according to testing the tuning nonlinear curve of YTF obtained, being refined as the less n of a frequency interval frequency range, being then assumed to linear between each frequency range by curve, slope is determined with termination frequency by the starting point of each frequency range; The object fitting whole tuning curve is arrived by the slope changing each frequency range in real time.Linear fit RAM and counter 9 produce according to clock and self timing logic and export address accumulator 10 to by the address pulse of the arbitrary interval of RAM Numerical Control, realize the selection of discrete frequency; Slope RAM and counter 11 store the slope data of each little frequency range, utilize clock generating to export the cumulative clock of accumulator 12; DAC
2the output of 13 and DAC
1the reference summation of 7, changes DAC in real time in scanning tuning process
1the slope of 7, thus the effect reaching that YTF scans tuning curve linear fit.
The effect of degaussing circuit 14 is the hysteresis characteristics compensating YTF, joins in the driving of YTF when each flyback, then disconnects after trace scanning starts.
Baric flow translation circuit 15 is by DAC
17 output voltages carry out filtering, amplification and conditioning, finally complete baric flow by sample circuit and convert, realize the tune drive of YTF.
Synchronous logic and control logic unit 8 complete whole YTF and drive and the clock synchronous of compensated part, sequential logic and control logic.
Adopt the present invention that YTF can be made to scan tuning non-linearly effectively to be revised, and real time calibration can be carried out as required, do not float by YTF temperature and the impact of aging action.
It should be noted the bright description of this law institute's reference a part of embodiment only as the demonstration of principle of the present invention and concept.The invention is not restricted to these embodiments.Can describe the embodiment of its distortion at this, and all distortion are all in the bright protection range of this law.
Claims (6)
1. revise the tuning nonlinear device of YIG tuned filter scanning in real time for one kind, comprise YIG tuned filter, be connected to the real time calibration source part of YIG tuned filter and tune drive and compensated part, it is characterized in that, real time calibration source part comprises comb generator and diverter switch, the comb wave signal that input signal and comb generator produce is connected to YIG tuned filter by diverter switch, there is provided inner comb wave to calibrate switched path, complete the YIG tuned filter tuning nonlinear real time calibration of scanning and correction, tune drive and compensated part comprise a frequency threshold logic unit, synchronised clock and control logic unit, scan non-linearity compensating unit, degaussing circuit and baric flow translation circuit, preset input is connected to baric flow translation circuit by a frequency threshold logic unit, compensate input and be connected to a frequency threshold logic unit by scan non-linearity compensating unit, synchronised clock and control logic unit are used for a frequency threshold logic unit, scan non-linearity compensating unit and degaussing circuit provide clock and control signal, degaussing circuit is connected to baric flow translation circuit, the realization of baric flow translation circuit is to the tune drive of YIG tuned filter and scan non-linearity correction-compensation,
Described the humorous logical block of frequency modulation comprises the first counter, data accumulator, the first address accumulator, data RAM and the first digital simulation converter, wherein said preset input is connected to the first digital simulation converter by the first counter, data accumulator, and the first address accumulator is connected to the first digital simulation converter by data RAM;
Described scan non-linearity compensating unit comprises linear fit RAM and the second counter, the second address accumulator, slope RAM and the 3rd counter, exports accumulator and the second digital simulation converter, wherein said compensation input by linear fit RAM and the second counter, the second address accumulator, slope RAM and the 3rd counter, export accumulator and be connected to the second digital simulation converter;
Described degaussing circuit, for compensating the hysteresis characteristic of YIG tuned filter, joins in the driving of YIG tuned filter when each flyback, then disconnect after trace scanning starts.
2. device as claimed in claim 1, is characterized in that: described comb generator produces the comb wave calibrating signal covering whole YIG tuned filter working frequency range.
3. device as claimed in claim 1, is characterized in that: the path that described diverter switch carries out input signal or comb wave calibrating signal is selected.
4. device as claimed in claim 1, is characterized in that: described first counter and data accumulator complete the initial preset of ideal situation, and described first address accumulator and data RAM complete refinement to each frequency driving data and oblique line matching.
5. device as claimed in claim 1, it is characterized in that: the output of described second digital simulation converter and described first digital simulation converter are with reference to suing for peace, for drived control YIG tuned filter, reach the effect of YIG tuned filter scanning tuning curve linear fit.
6. device as claimed in claim 1, is characterized in that: described baric flow translation circuit is used for the output voltage of the first digital simulation converter to carry out filtering, amplification and conditioning, completes baric flow conversion, realizes the tune drive of YIG tuned filter.
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103647525B (en) * | 2013-12-19 | 2016-06-29 | 中国电子科技集团公司第四十一研究所 | A kind of drive circuit improving YIG-filter scanning accuracy and driving method |
| CN103991558B (en) * | 2014-04-17 | 2016-03-30 | 中国航空工业集团公司沈阳飞机设计研究所 | A kind of disturbance rejection moment simulator |
| CN104502658B (en) * | 2014-10-13 | 2018-02-06 | 中国电子科技集团公司第四十一研究所 | A kind of quick tracing compensation circuit of preselector and method |
| CN104460797B (en) * | 2014-10-22 | 2016-05-25 | 中国电子科技集团公司第四十一研究所 | A kind of YTF voltage controlled current drive system of high-precision wide spectrum analyzer |
| CN106788411B (en) * | 2016-11-15 | 2020-08-11 | 中国电子科技集团公司第四十一研究所 | Method for improving linear scanning rate of signal receiving analyzer |
| CN107462854B (en) * | 2017-06-29 | 2019-09-24 | 中国电子科技集团公司第四十一研究所 | A kind of method of automatic acquisition YIG tuned filter offset data |
| CN107238795B (en) * | 2017-08-08 | 2018-04-27 | 西安科技大学 | A kind of small integrated YTF nonlinear characteristics test system and method |
| CN108802651B (en) * | 2018-06-08 | 2020-06-05 | 中国电子科技集团公司第四十一研究所 | Online correction device and correction method for temperature drift of noise coefficient analyzer |
| CN116073098B (en) * | 2023-03-03 | 2023-08-08 | 成都威频科技有限公司 | Ultra-wideband adjustable band-pass filter |
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| CN102723960A (en) * | 2012-06-05 | 2012-10-10 | 中国电子科技集团公司第四十一研究所 | Radio frequency signal preselector for electric tuning |
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Effective date of registration: 20190308 Address after: 266000 No. 98 Xiangjiang Road, Huangdao District, Qingdao City, Shandong Province Patentee after: China Electronics Technology Instrument and Meter Co., Ltd. Address before: 266000 No. 98 Xiangjiang Road, Qingdao economic and Technological Development Zone, Shandong Patentee before: The 41st Institute of CETC |
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Address after: Huangdao Xiangjiang Road 266555 Shandong city of Qingdao Province, No. 98 Patentee after: CLP kesiyi Technology Co.,Ltd. Address before: 266000 No. 98 Xiangjiang Road, Huangdao District, Shandong, Qingdao Patentee before: CHINA ELECTRONIC TECHNOLOGY INSTRUMENTS Co.,Ltd. |