CN103248379B - Small antenna auxiliary radio frequency phase correction method for monopulse track receiver of shipborne satellite communication system - Google Patents
Small antenna auxiliary radio frequency phase correction method for monopulse track receiver of shipborne satellite communication system Download PDFInfo
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Abstract
The invention relates to a small antenna auxiliary radio frequency phase correction method for a monopulse track receiver of a shipborne satellite communication system. The method comprises the following content: (1), selection and use of a phase-correction small antenna and a phase-correction signal source, (2) mounting of the phase-correction small antenna and the phase-correction signal source, and (3) the small antenna auxiliary radio frequency phase correction principle and phase correction steps, wherein the phase correction steps comprise step one, satellite phase correction is performed to obtain a phase correction value Gamma and corresponding sum-difference channel gain Kappa; step two, small antenna phase correction is performed in the same state to obtain sum/difference channel gain Omega and sum/difference channel synthesis phase shift Beta; and step three, small antenna phase correction is performed again at sea to obtain new sum-difference channel gain Omega' and sum-difference channel synthesis phase shift Beta', the new phase correction value of orientation and pitching is: Gamma' =Gamma + (Beta' CBeta), the new channel gain of orientation and pitching is Kappa'=Kappa*Omega/Omega', and Gamma' and Kappa' are used for setting parameters of a receiver again to finish the phase correction. The invention relates to the small antenna auxiliary radio frequency phase correction method for the monopulse track receiver of the shipborne satellite communication system, and meets the tracking requirement of shipborne satellite communication antennae for a communication satellite.
Description
Technical field
The present invention relates to a kind of shipborne satellite communication Mono-pulse Tracking Receiver miniature antenna Assisted RF Plasma CVD school phase method, belong to space telemetry and control technology field.
Background technology
Shipborne satellite communication station is the important means of surveying vessel shore-ship communication, and heavy caliber shipborne satellite communication antenna generally adopts single-pulse track system.Current Mono-pulse Tracking Receiver school adopts static pre-school phase mode mutually, general principle is under harbour static conditions, the beacon signal that antenna utilizes target satellite to launch, adjustment is directed to reception and signal maximum direction, azimuth axis (three axle tracking system antennas are intersecting axle) and pitch axis draw inclined certain angle respectively, then track receiver phase value and yield value is adjusted, make track receiver output cross, pitch error voltage ratio reaches normal ratio, like this, antenna just has follows the tracks of convergence property preferably, meets Ship Rocking Isolation index request.
Third generation surveying vessel shipborne satellite communication antenna has realized track receiver automatic school phase under static conditions, and its principle is consistent with the principle of manual school phase.Because beacon signal and immediate vicinity field intensity change comparatively mild, therefore antenna computer for controlling system cannot judge the particular location with center.Comparatively large with signal 3dB point place (with central field intensity values half place) field intensity rate of change, antenna computer for controlling system can judge particular location.After obtaining on a direction two and signal 3dB point position, can derive and center.Behind antenna direction and center, computer, by manual school phase process control antenna, coordinates track receiver to complete school phase.
Defend logical track receiver phase value to be determined by antenna and difference channel phases, relevant with the many factors such as satellite championship, beacon frequency, polarization mode, shipborne satellite communication station geographical position, the active and standby situation of low noise amplifier, ambient temperature.Defend logical stand in marine change antenna feed sum-difference network device after, and difference channel phases significant change, need at sea under dynamic condition to track receiver again school phase; When task marine site, antenna and difference channel phases comparatively harbour school phase time change, when the difference of track receiver phase value and actual value obviously increases, this change causes defending sky, logical station and watches the deterioration of feedback with subsystem tracking performance, error voltage convergence slowly, to be there is " drawing a circle " phenomenon in antenna in tracing process, even cannot follow the tracks of time serious, also need school phase again.
In addition, due to cloth station, the surveying vessel whole world, along with the increase of China's space launch mission frequency, the once repeatedly task of sailing of surveying vessel, requirements at the higher level are proposed to satellite repeater resource, before using new satellite resource, as antenna polarization working method need be changed or track receiver did not carry out school phase in advance to new satellite beacon, just school phase must be carried out to track receiver under dynamic condition at sea.
If shipborne satellite communication station antenna servo system has thrown off autotracking ring under dynamic condition at sea, antenna shakes by ship have been affected and will lose target satellite direction, and more to star artificial school phase uncertain factor, and school phase precision is difficult to reach tenacious tracking requirement.Utilize and in ship platform, auxiliary source is installed and surveying vessel deck plane layout restrictions is limited by mutually to track receiver school and defends exceedingly high bobbin system design accuracy less demanding and be difficult to carry out.At present, defending logical Mono-pulse Tracking Receiver can't at sea school phase in real time under current intelligence, and this brings very big hidden danger to whole shore-shop communication system, has a strong impact on and constrain satisfactorily completing of test mission.
summary of the invention
The object of the invention is to overcome above-mentioned deficiency, a kind of shipborne satellite communication Mono-pulse Tracking Receiver miniature antenna Assisted RF Plasma CVD school phase method is provided, it is by installing auxiliary school phase miniature antenna additional defending on exceedingly high line interarea, phase signals source, school analog satellite beacon signal is utilized to provide school phase basis of reference for defending logical Mono-pulse Tracking Receiver, realize the automatic calibration of sum and difference channels phase changing capacity, meet the tracer request of shipborne satellite communication antenna to communication satellite.
The object of the present invention is achieved like this: a kind of shipborne satellite communication Mono-pulse Tracking Receiver miniature antenna Assisted RF Plasma CVD school phase method, and it is made up of following content:
(1) school phase miniature antenna and phase signals source, school, is selected
School phase miniature antenna selects pyramidal horn antenna, dipole antenna, cone helical antenna or flat helical antenna, and microwave signal source is selected in phase signals source, school;
(2), school phase miniature antenna and phase signals source, school are installed
School phase miniature antenna is arranged on to be defended on exceedingly high line interarea, the feeder line of school phase miniature antenna connects phase signals source, school, miniature antenna beam center is aimed at and is defended exceedingly high line minor face, logical center of antenna is defended because miniature antenna departs from, produce and signal sum and difference signals defending in logical antenna feed simultaneously, can detect and/differ from passage relative displacement;
(3), miniature antenna Assisted RF Plasma CVD school facies principle and school phase step
Step one, school is accurately obtained mutually to star school be worth mutually
, corresponding and poor channel gain is
;
Step 2, under the state mutually same to star school, carry out miniature antenna school phase, now defend exceedingly high line wide star, miniature antenna work, fixedly defend exceedingly high line receiving polarization angle as 0o, arrange azimuth axis school is worth for 0o simultaneously mutually, and pitch axis school is worth for 90o mutually, then can obtain output error voltage:
In formula:
K---for fixed value is determined by AGC reference voltage;
μ---be normalization error;
---for miniature antenna departs from minor face angle;
---for/difference passage relative phase shift;
---for miniature antenna defends the resultant error angle of exceedingly high line relatively;
Azimuthal error voltage
with pitch error voltage
can be exported by receiver and obtain, can obtain thus and/difference channel gain
with with/difference passage synthesize phase shift
as shown in the formula:
Step 3, suppose that channel gain becomes through after a period of time
, passage phase shift becomes
if school is worth not respective change mutually, receiver output error can produce cross-couplings, and difference slope also can change, and need to re-start school phase, process is as follows:
Miniature antenna connects signal source, signal source is set to beacon frequency, defend exceedingly high line wide star, fixedly defend exceedingly high line receiving polarization angle as 0 °, arrange track receiver azimuth axis school to be worth mutually be 0 °, pitch axis school is worth mutually is 90 °, by the error voltage that receiver exports, obtain new for difference channel gain
phase shift is synthesized with difference passage
, in conjunction with before obtain and/difference channel gain
phase shift is synthesized with difference passage
, it is as follows that track receiver school is worth change mutually:
Orientation, the new school of pitching are worth mutually:
Orientation, the gain of pitching new tunnel are:
Utilize
,
reset receiver parameters and namely complete school phase.
Compared with prior art, the present invention has following beneficial effect:
A kind of shipborne satellite communication Mono-pulse Tracking Receiver miniature antenna Assisted RF Plasma CVD school of the present invention phase method, it has the following advantages:
(1), school provided by the invention phase method designs for boat-carrying satellite communication antena specially, compared with the calibration of TT&C antenna cooperative target, the beacon signal type be suitable for is wider, and defend exceedingly high line interarea because auxiliary school phase miniature antenna is arranged on, eliminate the impact that antenna-point accuracy is worth mutually on school;
(2), the present invention can solve and defend logical standing in when the pre-school of harbour is worth mutually because the track receiver school after the multiple changes such as environmental change, line/circular polarization conversion, A/B polarization conversion, replacing microwave device is worth marine dynamic corrections problem mutually, school phase beacon can also be utilized at sea to be worth mutually the close beacon school of frequency estimate, shipborne satellite communication station polytype marine school phase demand can be met;
(3), joint-trial field static test and marine dynamic test have been carried out mutually respectively in miniature antenna Assisted RF Plasma CVD school, in each school phase study, carry out again school respectively and believe that target school is worth mutually and revise test calibration is worth mutually estimates that non-school believes that calibration is worth test mutually with utilizing school to believe.In static test, the cross-couplings index after school completes mutually reaches the level being better than 5:1, and at sea in dynamic test, after school completes mutually, track receiver locking is normal, antenna tracking is stable.From the experimental results, miniature antenna Assisted RF Plasma CVD school can reach higher cross-coupling technique index request mutually.
The present invention can meet shipborne satellite communication station polytype marine school phase demand, drastically increase the reliability of boat-carrying satellite communication antena servo tracking system, fully utilize the ability of various satellite resource under making shipborne satellite communication station possess long-term Jobs on the sea continuously and case of emergency on a large scale, there is important use value.
Accompanying drawing explanation
Fig. 1 is the principle schematic of single channel monopulse track receiver.
Fig. 2 is difference signal vector relations schematic diagram.
Fig. 3 is that the additional miniature antenna of the present invention assists school facies principle schematic diagram.
Fig. 4 is auxiliary school phase miniature antenna model schematic.
Fig. 5 is miniature antenna standing-wave ratio schematic diagram.
Fig. 6 is miniature antenna axial ratio schematic diagram.
Fig. 7 is miniature antenna radiation direction schematic diagram.
Phase signals source, Fig. 8 school principle schematic.
Embodiment
For illustrating the present invention, first Mono-pulse Tracking Receiver operation principle is analyzed as follows:
(1) track receiver principle
Step one, according to track receiver principle derivation output error voltage formula
Fig. 1 is the operation principle block diagram of Mono-pulse Tracking Receiver, shipborne satellite communication station antenna uses the differential mode feed of TE21 mould, in difference branch road, pitch error signal delta EL and the orthogonal addition of azimuth error signal Δ AZ are become difference signal, obtain known difference signal vector relations as shown in Figure 2 by multimode feed is theoretical.
As follows with the expression formula of, difference signal:
in formula:
B---for and signal amplitude;
μ---be normalization error,
;
---be the beacon signal frequency that feed receives;
,
---for initial phase during, Composite Signal single channel;
---for antenna departs from the angle of satellite.
Can establish and differ from passage phase shift
, then and, the expression formula of difference signal can arrange as follows:
In Fig. 1, empty frame inside is single channel composite part (sum-difference network) schematic diagram, and wherein modulation signal generator produces low-frequency square-wave modulation signal, if modulation signal is square-wave signal
:
In formula:
N---be 0,1,2,3,4 .... etc. positive integer;
---be the angular frequency of square-wave signal
.
Will
being launched into the Fourier series form is:
，k＝0,1,2,3,4,5,……..
If difference signal is
:
The output of modulator
for modulation signal is multiplied with difference signal, if the gain that is multiplied is 1, then:
as can be seen from the above equation
not containing carrier frequency component, therefore can be combined into a road with signal, the signal after synthesis is:
Signal after synthesis transmits in a passage, and to amplify equally when signal transmits with difference signal, same frequency conversion, produce same time delay (constant with the relative phase shift of, difference signal), and therefore passage produces same impact to signal sum and difference signals.Difference signal is completed on the normalization (elimination carrys out the impact of wave amplitude) with signal after AGC amplifier.In phase-locked, amplitude detection, utilize the narrow-band filtering tracking characteristics of superhet phase-locked loop, make loop-locking in reference source frequency, keep fixing with the frequency of signal, phase place and reference source like this.Then utilize reference source to complete amplitude synchronous detection, error signal demodulation.Phase-locked loop intermediate frequency exports:
In formula:
K---for fixed value is determined by AGC reference voltage;
---for after passage down-conversion with signal angular frequency.
Reference source output frequency is:
In Fig. 1, the output signal of reference source carries out phase shift through phase shifter and quadrature phase shifter, if the signal after phase shift is:
The essence of phase detector is that reference carrier is multiplied with input signal, if the gain that is multiplied is 1, then:
wherein:
=
, one is DC terms, and one is high fdrequency component, all not containing error signal, and therefore can filtering easily;
in first two be multiplied, and filtering high fdrequency component is:
So:
=-
In like manner:
Expression formula is exported, if regulate phase shifter to make as can be seen from phase detection
, then phase detection exports and is:
＝-sin
＝-Δ
EL
cos
＝Δ
AZ
Can find out that error signal is in fact out demodulated after phase detection by upper two formula formulas, only form of communication.Δ
eL formula express signal through anti-phase amplification, Δ
aZ the signal that formula is expressed amplifies through homophase, and amplification quantity is set all as k1.Signal after amplification is:
＝k1
sin
＝Δ
EL ＝
k1
k1
cos
＝Δ
AZ
Signal after amplification enters synchronous detector, and the essence of synchronous detector is multiplier, if the gain that is multiplied of multiplier is 1, then:
Δ
EL＝k1
sin
＝p
（1）
Δ
AZ＝k1
cos
＝p
（2）
In formula, p=kk1/2 is constant, demodulation of can realizing ideal.The error signal of form of communication is just transformed into direct current by the effect of synchronous detection.Therefore error can be treated as direct current by following analysis when exchanging error signal.
If feed only produces azimuthal error, pitch error signal is zero, then detection goes out should have Δ
eL=0;
If
,
, n is integer, then have:
Δ
EL=－
Because sin
=0, so:
Δ
EL=－
As can be seen from upper two formulas: Δ
eL≠ 0, Δ
aZhave the loss of signal, voltage reduces to original cos
doubly, cross-couplings is created.Cross-couplings is:
In like manner, if
,
, n is integer, cross-couplings:
H
E-A＝
From analyzing above: if the phase shift adjustment of phase shifter is inaccurate, or sum-difference network is added front sum and difference signals relative phase shift
change and cause
, then have cross-couplings to produce, cross-couplings equals difference
cotangent, cross-couplings produce while error voltage reduce to original cos
doubly.
Step 2, miniature antenna school phase
As Fig. 3, defend logical antenna surface is found more suitable, install miniature antenna, miniature antenna beam center is aimed at and is defended exceedingly high line minor face, defend logical center of antenna because miniature antenna departs from, produce and signal and difference signal defending in logical antenna feed simultaneously, can detect and/differ from passage relative phase shift.
Suppose that obtaining school to star school phase time is worth mutually
, corresponding and poor channel gain is
, defend exceedingly high line wide star, miniature antenna work, fixedly defending exceedingly high line receiving polarization angle is 0o, and arrange azimuth axis school simultaneously and be worth for 0o mutually, pitch axis school is worth for 90o mutually, can be expressed as according to formula (1) and (2) output error voltage:
In formula:
K---for fixed value is determined by AGC reference voltage;
μ---be normalization error;
---for miniature antenna departs from minor face angle;
---for/difference passage relative phase shift;
---for miniature antenna defends the resultant error angle of exceedingly high line relatively;
Azimuthal error voltage
with pitch error voltage
can be exported by receiver and obtain, can obtain thus and/difference channel gain
with with/difference passage synthesize phase shift
as shown in the formula:
Suppose that channel gain becomes through after a period of time
, passage phase shift becomes
if school is worth not respective change mutually, receiver output error can produce cross-couplings, and difference slope also can change, and need school phase again, process is as follows:
Miniature antenna connects signal source, and signal source is set to beacon frequency, defends exceedingly high line wide star, fixedly defend exceedingly high line receiving polarization angle as 0o, arranging track receiver azimuth axis school is worth for 0o, pitch axis school are worth for 90o mutually mutually, the error voltage exported by receiver, obtains new for difference channel gain
phase shift is synthesized with difference passage
, in conjunction with before obtain and/difference channel gain
phase shift is synthesized with difference passage
, it is as follows that track receiver school is worth change mutually:
Orientation, the new school of pitching are worth mutually:
Orientation, the gain of pitching new tunnel are:
Utilize
,
reset receiver parameters and just complete school phase.
Additional miniature antenna assists school to need mutually to be equipped with following equipment: miniature antenna, signal source, cable.
(1) miniature antenna
Miniature antenna can adopt pyramidal horn antenna, dipole antenna, cone helical antenna, flat helical antenna etc., and angularly consider from use, installation, cost, micro-band flat helical antenna is a good selection.The technical indicator of micro-band flat helical antenna is as follows:
Frequency range: 3.625GHz ~ 4.2GHz
The Research of Antenna Polarization: circular polarization
Axial ratio :≤3dB
Standing-wave ratio :≤2:1
Directional diagram: simple beam
Input impedance: 50 Ω
Microstrip antenna have low section, size little, lightweight, be easy to install, the advantage such as cost is low, flexible design.Flat helical antenna is a kind of all channel antenna, and the little and very easy realization of size, so be widely used in ultra-wideband antenna.
The thickness that antenna substrate employing is commonly used is the sheet material of the TLY-5 of 0.5mm.The brachium of helical antenna is determined by the low-limit frequency of Antenna Operation, and formula is as follows:
In formula:
---be the light velocity;
---be dielectric-slab dielectric constant;
---be the maximum radius of spiral arm.
Utilize electromagnetic field simulation software HFSS, set up antenna model (see figure 4), simulation result is shown in Fig. 5 ~ Fig. 7.
(2) school phase signals source
Phase signals source, school can adopt general microwave signal source, also can specialized designs dedicated beacon source.Dedicated beacon volume source is little, portable, can be transported to easily on antenna bearingt platform during use, and the used time is not collected in warehouse, and the major design index of beacon source is as follows:
Frequency range: 3.625GHz ~ 4.2GHz
Frequency step: 25kHz
Phase noise :≤-65dBc/Hz 100Hz
≤-75dBc/Hz@1kHz
≤-80dBc/Hz@10kHz
Spuious :≤-45dBc
Output level :≤-30dBm@0dB decays
Adjustable damping scope: 30dB
Decay stepping: 1dB
Reference source: 10MHz OCXO
Temperature stability: ± 0.05ppm
Working temperature :-20 DEG C ~+55 DEG C
Storing temperature :-40 DEG C ~+70 DEG C
Alternating Current Power Supply: 220 (1 ± 10%) V, frequency 50Hz ± 1Hz
Front panel can show current output frequency and output level value and arrange by button.
Exporting to realize the little stepping in broadband, adopting three ring frequency synthesis schemes, seeing Fig. 8.First synthesized reference ring PLL1 and large stepping ring PLL2 respectively; PLL2 and VCO mixing exports the phase demodulation reference signal that intermediate-freuqncy signal obtains after 4 frequency dividers with PLL1 after filter and amplification, is input to phase discriminator simultaneously, carries out with frequency phase demodulation.Phase detector output signal is after loop filter, and control VCO enters lock.VCO output signal is input to numerical-control attenuator through 2 splitters 2, realizes output signal level 30dB decay adjustable extent.Output signal through directional coupler one tunnel input wave detector, the power voltage detected input MCU, another road exports through isolator.
The installation of school phase equipment:
Install a miniature antenna in the position that antenna interarea is suitable, the feeder line of miniature antenna can from the back side of the gap between two pieces of panels through panel.The installation of miniature antenna can be fixed by bolts on panel by punching on panel, and miniature antenna only has the square size of 120mm, and blocking the impact of antenna gain of it is very little, also completely negligible on the impact of other electrical specifications of antenna.
The scope of application of miniature antenna Assisted RF Plasma CVD school phase
1. polarize adaptability
Additional auxiliary antenna school is applicable to the satellite beacon signals of any polarization mutually.Because miniature antenna defends the near field characteristic of exceedingly high line relatively, circular polarization characteristics is not obvious, and revolving mouth in the left/right of difference branch road has output, so can adapt to circular polarization, linear polarization.
2. environmental change adaptability
The passage phase shift caused due to environmental change and change in gain, use additional auxiliary antenna school can be resolved mutually.
3. device adaptability is changed
Due to change and passage, difference passage to sum-difference network between parts, the passage phase shift variations caused as cable, low noise, waveguide, filter etc. and channel gain change, and use additional auxiliary antenna school can be resolved mutually.
4. the adaptability of different frequency beacon
When using additional auxiliary miniature antenna, from azimuth pitch, error voltage that receiver demodulates, can obtain and/difference passage synthesis phase shift β, it comprises two parts, and/difference passage relative phase shift
, miniature antenna defends the resultant error angle of exceedingly high line relatively
.For different beacon frequencies, if miniature antenna defends the resultant error angle of exceedingly high line relatively
identical, and difference passage relative phase shift
difference, then through to the beacon school of a star mutually after, then with miniature antenna obtain with frequently and/difference passage synthesis phase shift
, and different frequency and/difference passage synthesis phase shift
, then not only can be corrected the passage phase shift of same beacon frequently by miniature antenna, the passage phase shift of different frequency can also be corrected.
Miniature antenna defends the resultant error angle of exceedingly high line relatively
change with frequency is relevant with differential mode feed comprise network, rule of thumb known, and school, orientation is worth the non-orthogonal property that is worth mutually with pitching school mutually and is usually no more than 20 ° with the change of frequency, and corresponding resultant error angle must be no more than 20 ° with the change of frequency.Therefore be worth mutually according to known beacon school and calculate that the maximum deviation that unknown beacon school is worth mutually is no more than 20 °, corresponding intersection lotus root is closed and is better than 2:1, can apply for general sea situation.
In actual applications, because satellite beacon frequency is except indivedual beacon, mainly concentrate on the height (4190 ± 15MHz) of satellite downlink frequency, in (3950 ± 15MHz MHz), low (3700 ± 15MHz MHz) three frequency bands, as long as within therefore studying frequency phase-difference 15MHz school believe that calibration is worth mutually and estimate whether the school phase error that beacon school, non-school is worth mutually meets surveying vessel engineer applied.By test, when frequency phase-difference 5MHz, 10MHz, 15MHz, carry out school to high, medium and low three kinds of frequencies and believe that calibration is worth mutually and estimate that beacon school, non-school is worth test mutually, result of the test shows, school intersects lotus root mutually afterwards and closes and be all better than 5:1.
And the adaptability that the switches of/A/B of poor reception passage polarization 5.
Following several situation is divided with the A/B of/poor reception passage adaptability that polarizes:
For defending logical Antenna Operation in linear polarization, only A/B polarization switches and beacon used is former school crosses phase, with reference to the adaptability changing device;
For defending logical Antenna Operation in linear polarization, not only A/B polarization switches, and beacon used is that phase was not crossed in school in the past, then with reference to the adaptability of different frequency beacon;
For defending logical Antenna Operation in circular polarization, need to switch and passage, difference passage simultaneously, the beacon of phase is crossed, with reference to the adaptability changing device for school; The beacon of phase is crossed for not school, then with reference to the adaptability of different frequency beacon.In addition, miniature antenna relatively defend exceedingly high line position constant time, differential gap passage A, B polarization, except passage phase shift variations, pitch axis school is worth in theory by anti-phase 180o mutually, and after with reference to the replacing adaptability of device and the adaptability of different frequency beacon, pitch axis school is worth mutually and should adds 180o again.
6) test situation
Under static conditions, miniature antenna Assisted RF Plasma CVD school phase study carries out school respectively and believes that target school is worth mutually and revise test and utilize school phase beacon to estimate that non-school believes that calibration is worth test mutually.School believes that calibration is worth the phase shift cable revised and test by changing 4 groups of different phase shift values in sum-difference network mutually, and test the cross-couplings index after utilizing miniature antenna school mutually respectively at different frequency point, test result cross-couplings index top grade is in 10:1; Non-school believes that calibration is worth in test mutually to utilize school phase beacon to estimate, C frequency range downlink reception frequency high, medium and low 3 Frequency points respectively to tower test to be separated by 10MHz, 15MHz, 20MHz with school phase frequency time, the test that calibration is worth mutually is believed in non-school to utilize miniature antenna school to estimate mutually, and after school completes mutually, cross-couplings reaches the level being better than 5:1.
Under marine dynamic condition in the phase study of miniature antenna Assisted RF Plasma CVD school, by changing phase shift cable, testing respectively and utilizing No. VI, Asia-Pacific 134oE satellite horizontal polarization 4199.825 MHz beacon to be worth correction different mutually with the school under difference passage phase shifting scenarios; And utilize 134oE satellite horizontal polarization 4199.825 MHz beacon school, No. VI, Asia-Pacific be worth mutually estimation Chinasat 6 125oE satellite horizontal polarization 4192MHz beacon school be worth test mutually.The new school of Wei Tongzhan is worth tracking satellite at sea mutually, and antenna locking is normal, can tenacious tracking.
Claims (1)
1. a shipborne satellite communication Mono-pulse Tracking Receiver miniature antenna Assisted RF Plasma CVD school phase method, is characterized in that: it is made up of following content:
(1) school phase miniature antenna and phase signals source, school, is selected
School phase miniature antenna selects pyramidal horn antenna, dipole antenna, cone helical antenna or flat helical antenna, and microwave signal source is selected in phase signals source, school;
(2), school phase miniature antenna and phase signals source, school are installed
School phase miniature antenna is arranged on to be defended on exceedingly high line interarea, the feeder line of school phase miniature antenna connects phase signals source, school, miniature antenna beam center is aimed at and is defended exceedingly high line minor face, logical center of antenna is defended because miniature antenna departs from, produce and signal sum and difference signals defending in logical antenna feed simultaneously, can detect and/differ from passage relative displacement;
(3), miniature antenna Assisted RF Plasma CVD school facies principle and school phase step
Step one, star school to be obtained accurately mutually and/difference passage relative phase shift
, corresponding and poor channel gain is
;
Step 2, under the state mutually same to star school, carry out miniature antenna school phase, now defend exceedingly high line wide star, miniature antenna work, fixedly defend exceedingly high line receiving polarization angle as 0o, arrange azimuth axis school is worth for 0o simultaneously mutually, and pitch axis school is worth for 90o mutually, then can obtain output error voltage:
In formula:
K---for fixed value is determined by AGC reference voltage;
μ---be normalization error;
---for miniature antenna departs from minor face angle;
---for/difference passage relative phase shift;
---for miniature antenna defends the resultant error angle of exceedingly high line relatively;
Azimuthal error voltage
with pitch error voltage
can be exported by receiver and obtain, can obtain thus and/difference channel gain
with with/difference passage synthesize phase shift
as shown in the formula:
Step 3, suppose that channel gain becomes through after a period of time
, passage phase shift becomes
if school is worth not respective change mutually, receiver output error can produce cross-couplings, and difference slope also can change, and need to re-start school phase, process is as follows:
Miniature antenna connects signal source, signal source is set to beacon frequency, defend exceedingly high line wide star, fixedly defend exceedingly high line receiving polarization angle as 0 °, arrange track receiver azimuth axis school to be worth mutually be 0 °, pitch axis school is worth mutually is 90 °, by the error voltage that receiver exports, obtain new for difference channel gain
phase shift is synthesized with difference passage
, in conjunction with before obtain and/difference channel gain
phase shift is synthesized with difference passage
, it is as follows that track receiver school is worth change mutually:
Orientation, the new school of pitching are worth mutually:
Orientation, the gain of pitching new tunnel are:
Utilize
,
reset receiver parameters and namely complete school phase.
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|---|---|---|---|
| CN201310117536.7A CN103248379B (en) | 2013-04-03 | 2013-04-03 | Small antenna auxiliary radio frequency phase correction method for monopulse track receiver of shipborne satellite communication system |
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| CN201310117536.7A CN103248379B (en) | 2013-04-03 | 2013-04-03 | Small antenna auxiliary radio frequency phase correction method for monopulse track receiver of shipborne satellite communication system |
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| CN104777468B (en) * | 2015-05-12 | 2017-08-25 | 上海无线电设备研究所 | Suppress the method that radar secondary lobe is intercepted and captured using radar antenna and poor passage |
| CN108152811B (en) * | 2017-12-08 | 2021-06-29 | 中国人民解放军63698部队 | Method for dynamically calibrating shipborne satellite communication earth station tracking phase based on probability |
| CN108988932A (en) * | 2018-06-28 | 2018-12-11 | 中国人民解放军63698部队 | Digital tracking receiver emulation platform based on MATLAB |
| CN110940950B (en) * | 2019-11-28 | 2022-03-22 | 中国船舶重工集团公司第七一七研究所 | Difference slope stabilizing method |
| CN111948464B (en) * | 2020-07-30 | 2023-06-13 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Offset-fed wireless closed-loop self-tracking phase correction system |
| CN113595657B (en) * | 2021-06-03 | 2023-09-12 | 中国人民解放军63623部队 | Phase correction method and device for radio measurement and control equipment based on solar noise |
| CN113629400B (en) * | 2021-08-19 | 2023-09-26 | 王举思 | Single pulse antenna tracking phase correction method |
| CN115276846B (en) * | 2022-06-09 | 2024-01-23 | 上海盛磊信息科技有限公司 | X-frequency band single pulse tracking analog signal source output equipment |
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| CN102412912A (en) * | 2011-08-25 | 2012-04-11 | 中国电子科技集团公司第十研究所 | Wired sectional-type phase-correction method for ground station |
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