CN104007662B - One improves the radio frequency simulation conforming operation method of aerial array maximum signal to noise ratio - Google Patents
One improves the radio frequency simulation conforming operation method of aerial array maximum signal to noise ratio Download PDFInfo
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Abstract
The present invention relates to radio frequency simulation antenna signal to noise ratio technical field, open one improves the radio frequency simulation conforming operation method of aerial array maximum signal to noise ratio, the device that described method uses includes: radio frequency simulation aerial array feed passage, described radio frequency simulation aerial array feed passage is provided with switch filter group, being provided with code word change-over panel in the control circuit of switch filter group control end, code word change-over panel is connected with the computer export frequency code end of peripheral hardware.The present invention can leveling reduce radio frequency simulation aerial array ground noise signal on full frequency band, thus realize improving the conforming purpose of its maximum signal to noise ratio.Measure through practice, maximum signal to noise ratio consistency improvement 30dB can be can ensure that harmonics restraint reaches 40dBc by this programme simultaneously.
Description
Technical field
The present invention relates to radio frequency simulation antenna signal to noise ratio technical field, particularly relate to one and improve radio frequency simulation aerial array
The conforming operation method of maximum signal to noise ratio.
Background technology
Radio frequency simulation aerial array is the important component part of radio frequency simulation pilot system, is mainly used in signal environment mould
The radiofrequency signal intending subsystem generation is radiated in microwave dark room, and controls the control of computer in radio frequency simulation pilot system
Under, by controlling the amplitude of radiofrequency signal, phase place, the continuous movement locus of the target such as guinea pig.
Radio frequency simulation aerial array maximum signal to noise ratio determines the dynamic range that radio frequency simulation pilot system can work, and is
One of radio frequency simulation aerial array important indicator.Maximum noise on radio frequency simulation aerial array different frequent points and maximum work output
Rate is closely related with ground noise.
Radio frequency simulation aerial array peak power output is primarily limited to feed the maximum output of passage intermediate power amplifier
Power.In power amplifier working frequency range, the peak power output difference on different frequent points is little, therefore radio frequency simulation antenna
The concordance of the maximum signal to noise ratio on array different frequent points depends primarily on ground noise.
From Noise Theory, the ground noise of radio frequency simulation aerial array is directly proportional to the gain of feed passage, feed
In the gain of passage and passage, the transmission characteristic of device used is closely related.When radio frequency simulation antenna array size is bigger, its
Feed passage will use long coaxial radio frequency cable.Owing to radio frequency simulation aerial array working frequency range is wider, in feed passage
The transmission characteristic of long coaxial cable different on different frequent points, show as that low-frequency range loss is little, high band loss is big, this
One characteristic makes the gain feeding passage present the feature that low-frequency range is high, high band is low, thus causes feeding channel low frequency section
Ground noise even can flood radio frequency simulation sky apparently higher than the ground noise of high band, the ground noise that its low-frequency range produces
The useful signal of linear array transmission.
Described Semi-Physical Simulation Test System: mathematical model, physical effect model together with actual interconnection
The analogue system of composition, is used for carrying out l-G simulation test or carrying out correlational study.
Described radio frequency simulation aerial array: be mainly made up of radio-frequency feed passage, control computer and spherical antenna array,
During work, it is each that radiofrequency signal is fed to aerial array by certain amplitude and phase place under controlling computer control by radio-frequency channel
Individual radiating element, the continuous motion of the targets such as guinea pig.
Described ground noise: the thermal noise that active electronic devices produces due to Electron Heat motion, through radio-frequency feed passage
Transmission, amplification, in the noise signal that its outfan produces.Maximum signal to noise ratio: refer on radio frequency simulation aerial array full frequency band each
Spiking output power on individual frequency and the ratio of ground noise power.Maximal input: refer to that feeding channels operation exists
During peak power output state, the input power of feed channel input ports.Maximum signal to noise ratio concordance: refer to radio-frequency channel each
The difference of maximum signal to noise ratio on frequency.
There are multiple technologies to can be used for improving the maximum signal to noise ratio concordance of radio frequency simulation aerial array at present, but use these
Technology can reduce the harmonics restraint of radio frequency simulation aerial array, and too high harmonic signal can produce false target, impact emulation
Result of the test.
Prior art related to the present invention is as follows
In radio frequency simulation aerial array feed passage, add equalizer can improve radio frequency simulation aerial array maximum noise
Ratio concordance, and equalizer is passive device, has without power supply, the advantage such as cost is relatively low, installation is simple, however it is necessary that root
According to radio frequency simulation aerial array ground noise curve adjust equalizer transmission characteristic, and harmonics restraint can only achieve-
15dBc。
The method adding equalizer amplifier and attenuator in radio frequency simulation aerial array feed passage can also improve radio frequency
The maximum signal to noise ratio concordance of phantom antenna array, but equalizer amplifier is active device, can introduce additional noise, improves effect
The most inconspicuous；The method cannot effectively suppress harmonic signal equally simultaneously.
Summary of the invention
For overcoming the deficiencies in the prior art, it is an object of the invention to provide one and improve radio frequency simulation aerial array
The big conforming operation method of signal to noise ratio.The present invention breaks through traditional conventional thinking, by the existing ripe ingenious combination of microwave device
Get up, can leveling reduce radio frequency simulation aerial array ground noise signal on full frequency band, thus it is maximum to realize improving it
The conforming purpose of signal to noise ratio.Measure through practice, can be by maximum signal to noise ratio consistency improvement 30dB by this programme, simultaneously
Can ensure that harmonics restraint reaches-40dBc.
For achieving the above object, the present invention adopts the following technical scheme that
One improves the radio frequency simulation conforming operation method of aerial array maximum signal to noise ratio, and its step is as follows: leveling is penetrated
Frequently the ground noise curve of phantom antenna array,
1) employing installs switch filter group, and switch filter group two ends additional in radio frequency simulation aerial array feed passage
It is connected between power amplifier and multi-channel electronic switch by the radio frequency interface of external interface respectively, i.e. second level power amplifier outfan；
Wherein, radio frequency interface uses standard female SMA interface, voltage standing wave ratio 2:1, maximal input 30dBm；
2) and increasing code word change-over panel in the control circuit of switch filter group control end, code word change-over panel is by outside
The control interface of interface is connected with external control computer, and code word change-over panel is connected with multi-channel electronic switch by internal interface；
Wherein, the interface that controls of external interface uses the LVDS interface of standard；Internal interface uses standard TTL interface, low
Voltage is 0.2V, and high voltage is 4.6V, sets low-voltage effective；
3) leveling radio frequency simulation aerial array ground noise curve,
During leveling, radio frequency simulation pilot system sends control signal before sending radio-frequency pulse 2 μ s, contains in control signal
Frequency code, also pulse code, pulse power information；
A. the input interface of code word change-over panel external interface, receives the frequency code of outer computer output, code word change-over panel
After receiving control signal, it is converted into, by external interface, the LVTTL signal that FPGA module is able to receive that；Extracted by FPGA module
Go out frequency code, convert thereof into multi-channel electronic switch control word according to the bandpass range of band filter, and control word is carried out
Latch；
The latch time is that 2 μ s subtract the code word change-over panel process time and multi-channel electronic switch controls the time, to guarantee Multi-path electricity
The sub-on-off control time controls time synchronized with external system；
The control word that FPGA module sends, after output interface module is changed, becomes TTL interface voltage, thus controls many
Road electrical switch switches over, it is achieved the code word conversion control to multi-channel electronic switch；
B. the multi-channel electronic switch in switch filter group realizes synchronism switching under the control of identical control word, makes radio frequency
Signal is by the band filter corresponding with its frequency and attenuator, and band filter has filtered the ground noise letter outside band
Number；Meanwhile, ground noise in the band of attenuator attenuation band bandpass filter, in making band, ground noise signal is reduced to by seal test equipment
Sensitivity；
When in band filter band, ground noise is X(dBm), wave filter, two total Insertion Loss of multi-channel electronic switch are Y
(dB), in improved band, ground noise is Z(dBm), then the attenuation of attenuator used by branch road is X-Y-Z(dB)；
Add extra Insertion Loss, reduce channel gain, make the peak power output of radio frequency simulation aerial array reduce,
Change the duty of power amplifier in passage simultaneously；
Under maximal input state, power amplifier no longer works in saturation, now improves feed passage
Input signal power, make power amplifier the most saturated, feed channel output power reaches maximum；Leveling ground noise is bent
Line, simultaneously by increasing input signal, makes the peak power output on different frequent points keep essentially identical, thus realizes improving frequency
The conforming purpose of phantom antenna array maximum signal to noise ratio；
Simultaneously by selecting suitable band filter bandwidth of operation, it is possible to ensure that harmonic signal is positioned at band filter work
Make outside frequency band, utilize the Out-of-band rejection of band filter to be filtered by harmonic signal；
Radio frequency simulation aerial array maximum signal to noise ratio consistency improvement 30dB can be made the harmonics restraint of feed passage simultaneously
Reach-40dBc；
Wherein, multi-channel electronic switch switching time is 0.1 μ s；Its Out-of-band rejection is-30dBc, inband flatness is ±
3dB；
Determine the attenuation of attenuator, the big rootlet of attenuation according to radio frequency simulation aerial array ground noise curve simultaneously
According to X-Y-Z(dB) it is calculated so that in the band of band filter, ground noise is down to design requirement.
One improves radio frequency simulation aerial array maximum signal to noise ratio concordance device, including: radio frequency simulation aerial array is presented
Electric channel, is provided with switch filter group in described radio frequency simulation aerial array feed passage, and switch filter group controls end
Being provided with code word change-over panel in control circuit, code word change-over panel is connected with the computer export frequency code end of peripheral hardware.
One improves radio frequency simulation aerial array maximum signal to noise ratio concordance device, and described radio frequency simulation aerial array feeds
Passage is consisted of with electrical switch phase shifter power amplifier programmable attenuator, and being positioned between power amplifier with electrical switch to be connected has switch filter
Ripple device group；Switch filter group is arranged on second level power amplifier outfan.
One improves radio frequency simulation aerial array maximum signal to noise ratio concordance device, and described switch filter group is by more than two
Road electrical switch, band filter and attenuator composition, being positioned between two multi-channel electronic switch connection has several by carrying logical filter
The algorithm circuit that ripple device and attenuator are composed in series；
Wherein, multi-channel electronic switch switching time is 0.1 μ s；Its Out-of-band rejection is-30dBc, inband flatness is ±
3dB。
One improves radio frequency simulation aerial array maximum signal to noise ratio concordance device, and described code word change-over panel is connect by input
Mouth, FPGA, power module and output interface composition, input interface is connected with output interface by FPGA module, and output interface leads to
Cross data wire to be connected with two multi-channel electronic switch of switch filter group.
One improves radio frequency simulation aerial array maximum signal to noise ratio concordance device, the input port of described code word change-over panel
The LVDS of employing standard receives circuit, receives the control signal sent by radio frequency simulation pilot system by LVDS.
Owing to using technical scheme as above, the present invention has a following superiority:
The present invention is by increasing switch filter group leveling ground noise in radio frequency simulation aerial array feed passage
Curve, simultaneously by increasing input signal, makes the peak power output on different frequent points keep essentially identical, thus realizes improving
The conforming purpose of maximum signal to noise ratio.Simultaneously by selecting suitable band filter bandwidth of operation, it is ensured that harmonic signal
It is positioned at outside band filter working band, utilizes the Out-of-band rejection of band filter to be filtered by harmonic signal.
It is applicable to the ground noise curve on leveling radio frequency simulation aerial array full frequency band, can also be applied to other
In wide band radio-frequency system.Can be adjusted flexibly according to the ground noise curve of radio frequency simulation aerial array, and can be by radio frequency
Phantom antenna array maximum signal to noise ratio consistency improvement 30dB, ensure that harmonics restraint index reaches-40dBc simultaneously.Improve
The system of radio frequency simulation aerial array maximum signal to noise ratio concordance technique construction, has and utilizes ripe microwave device to carry out ingeniously
Building of wonderful combination, the construction cycle is short.
Accompanying drawing explanation
Fig. 1 is the block diagram improving radio frequency simulation aerial array maximum signal to noise ratio concordance device；
Fig. 2 switch filter group installation site schematic diagram；
Fig. 3 installs switch filter group ground noise additional and improves effect schematic diagram.
Detailed description of the invention
In conjunction with drawings and Examples, the present invention is further elaborated.
As shown in Figure 1, 2, 3, one improves radio frequency simulation aerial array maximum signal to noise ratio concordance device, including: radio frequency
The array-fed passage of phantom antenna, is provided with switch filter group, switch filter in described radio frequency simulation aerial array feed passage
The control circuit of ripple device group control end is provided with the computer export frequency code end of code word change-over panel, code word change-over panel and peripheral hardware
It is connected.
Described radio frequency simulation aerial array feed passage is consisted of with electrical switch phase shifter power amplifier programmable attenuator,
It is positioned between power amplifier with electrical switch to be connected and has switch filter group.
Described switch filter group is made up of two multi-channel electronic switch, band filter and attenuator, is positioned at more than two
Connect between the electrical switch of road and have several algorithm circuit being composed in series by band filter and attenuator.
Described code word change-over panel is made up of input interface, FPGA, power module and output interface, and input interface passes through FPGA
Module is connected with output interface, and output interface is connected with two multi-channel electronic switch of switch filter group by data wire.
One improves radio frequency simulation aerial array maximum signal to noise ratio coherence method, uses and presents at radio frequency simulation aerial array
Electric channel installs additional switch filter group, and the measure of increase code word change-over panel, leveling radio frequency simulation antenna in control circuit
The ground noise curve of array, step is as follows:
Utilize switch filter group leveling radio frequency simulation aerial array ground noise curve, and make by increasing input signal
The peak power output of feed passage keeps consistent substantially, thus it is consistent to realize improving radio frequency simulation aerial array maximum signal to noise ratio
Property purpose, simultaneously can ensure that feed passage harmonics restraint reach-40dBc；
(1) code word change-over panel
The input port of code word change-over panel uses the LVDS of standard to receive circuit, receives and is passed through by radio frequency simulation pilot system
The control signal that LVDS sends.Radio frequency simulation pilot system sends control signal, in control signal before sending radio-frequency pulse 2 μ s
Do not contain only frequency code, the also information such as pulse code, pulse power.After code word change-over panel receives control signal, by connecing
Mouth die block is converted into the LVTTL signal that FPGA is able to receive that.Extracted frequency code by FPGA, lead to model according to the band of band filter
Enclose and convert thereof into multi-channel electronic switch control word, and control word is latched.The latch time is that 2 μ s subtract at code word change-over panel
Reason time and electrical switch control the time, to guarantee that electrical switch controls time and external system control time synchronized.FPGA sends out
The control word gone out, after output interface module is changed, becomes TTL interface voltage, thus controls electrical switch and switch over.
(2) switch filter group
Switch filter group is made up of electrical switch, band filter, attenuator.Electrical switch switching time is 0.1 μ s.
Mid frequency and the bandwidth of band filter determine according to actual needs, and its Out-of-band rejection is-30dBc, and inband flatness is
±3dB.Frequency between adjacent two wave filter is mutually linked, the most true according to radio frequency simulation aerial array ground noise curve
Determine the attenuation of attenuator so that in the band of band filter, ground noise is down to design requirement.
Electrical switch in switch filter group realizes synchronism switching under the control of identical control word, makes radiofrequency signal lead to
Crossing the band filter corresponding with its frequency and attenuator, band filter has filtered the ground noise signal outside band；Simultaneously
Ground noise in attenuator attentuating filter band, in making band, ground noise signal is reduced to acceptable size.
Assume that ground noise is X(dBm in band filter band), wave filter, two total Insertion Loss of electrical switch are Y(dB),
Improved ground noise is Z(dBm), then the attenuation of attenuator used by this branch road is X-Y-Z(dB).
After increasing switch filter group in radio frequency simulation aerial array feed passage, add extra Insertion Loss, reduce
Channel gain, makes the peak power output of radio frequency simulation aerial array reduce, changes the work shape of power amplifier in passage simultaneously
State.Under maximal input state, power amplifier no longer works in saturation, now can improve the defeated of feed passage
Entering signal power, make power amplifier the most saturated, feed channel output power reaches maximum.
By increasing switch filter group leveling ground noise curve in radio frequency simulation aerial array feed passage, with
Time by increasing input signal, make peak power output on different frequent points keep essentially identical, thus realize improving maximum letter
Make an uproar than conforming purpose.
During design wave filter, the bandwidth of wave filter is not more than the twice of its mid frequency, it is ensured that harmonic signal position
Outside band filter working band, the Out-of-band rejection of band filter is utilized to be filtered by harmonic signal.
External interface includes radio frequency interface and controls interface
(1) radio frequency interface, uses standard female SMA interface, voltage standing wave ratio 2:1, maximal input 30dBm.
(2) control interface, between external control computer and code word change-over panel, use the LVDS interface of standard.
Internal interface, uses standard TTL interface between electrical switch and code word change-over panel, low-voltage is 0.2V, high voltage
For 4.6V.Low-voltage is effective.
Fig. 2 is the loading position schematic diagram of certain radio frequency simulation aerial array feed passage breaker in middle bank of filters.From improvement
From the point of view of radio frequency simulation aerial array ground noise, switch filter group installation site improves effect the closer to channel end
The best.But as can be seen from the figure feed passage is divided into a lot of branch road at end by switch, if the position installed more is leaned on
After, required switch filter group quantity is the most, and cost is the highest.Maximum is believed by the ground noise produced in view of third level power amplifier
Ratio concordance impact of making an uproar is minimum, simultaneously for effectively to control improvement cost, determines that switch filter group is arranged on second level power amplifier defeated
Go out end.By the method for above-mentioned increase switch filter group, can effectively reduce radio frequency simulation aerial array ground noise, its effect
Fruit is such as Fig. 3.
Claims (1)
1. improve the radio frequency simulation conforming operation method of aerial array maximum signal to noise ratio, it is characterized in that: its step is as follows:
The ground noise curve of leveling radio frequency simulation aerial array,
1) switch filter group is installed in employing in radio frequency simulation aerial array feed passage additional, and switch filter group two ends are respectively
It is connected between power amplifier and multi-channel electronic switch by the radio frequency interface of external interface, i.e. second level power amplifier outfan；
Wherein, radio frequency interface uses standard female SMA interface, voltage standing wave ratio 2:1, maximal input 30dBm；
2) and increasing code word change-over panel in the control circuit of switch filter group control end, code word change-over panel passes through external interface
Control interface be connected with external control computer, code word change-over panel is connected with multi-channel electronic switch by internal interface；
Wherein, the interface that controls of external interface uses the LVDS interface of standard；Internal interface uses standard TTL interface, low-voltage
For 0.2V, high voltage is 4.6V, sets low-voltage effective；
3) leveling radio frequency simulation aerial array ground noise curve,
During leveling, radio frequency simulation pilot system sends control signal before sending radio-frequency pulse 2 μ s, containing frequency in control signal
Code, also pulse code, pulse power information；
A. the input interface of code word change-over panel external interface, receives the frequency code of outer computer output, and code word change-over panel receives
After control signal, it is converted into, by external interface, the LVTTL signal that FPGA module is able to receive that；Frequency is extracted by FPGA module
Rate code, converts thereof into multi-channel electronic switch control word according to the bandpass range of band filter, and latches control word；
The latch time is that 2 μ s subtract the code word change-over panel process time and multi-channel electronic switch controls the time, to guarantee that multichannel electronic is opened
Close control time and external system control time synchronized；
The control word that FPGA module sends, after output interface module is changed, becomes TTL interface voltage, thus controls Multi-path electricity
Son switch switches over, it is achieved the code word conversion control to multi-channel electronic switch；
B. the multi-channel electronic switch in switch filter group realizes synchronism switching under the control of identical control word, makes radiofrequency signal
By the band filter corresponding with its frequency and attenuator, band filter has filtered the ground noise signal outside band；With
Time, ground noise in the band of attenuator attenuation band bandpass filter, make that ground noise signal in band is reduced to by seal test equipment is sensitive
Degree；
When in band filter band, ground noise is X, and unit is dBm, wave filter, two total Insertion Loss of multi-channel electronic switch are Y, single
Position is dB, and in improved band, ground noise is Z, and unit is dBm, then the attenuation of attenuator used by branch road is X-Y-Z, unit
It is dB；
Add extra Insertion Loss, reduce channel gain, make the peak power output of radio frequency simulation aerial array reduce, simultaneously
Change the duty of power amplifier in passage；
Under maximal input state, power amplifier no longer works in saturation, now improves the defeated of feed passage
Entering signal power, make power amplifier the most saturated, feed channel output power reaches maximum；Leveling ground noise curve,
Simultaneously by increasing input signal, make the peak power output on different frequent points keep essentially identical, thus it is imitative to realize improving frequency
The true conforming purpose of aerial array maximum signal to noise ratio；
Simultaneously by selecting suitable band filter bandwidth of operation, it is possible to ensure that harmonic signal is positioned at band filter work frequency
Outside band, the Out-of-band rejection of band filter is utilized to be filtered by harmonic signal；
The harmonics restraint of feed passage can be made to reach radio frequency simulation aerial array maximum signal to noise ratio consistency improvement 30dB simultaneously
To-40dBc；
Wherein, multi-channel electronic switch switching time is 0.1 μ s；Its Out-of-band rejection is-30dBc, and inband flatness is ± 3dB；
Determine the attenuation of attenuator according to radio frequency simulation aerial array ground noise curve, the size of attenuation is according to X-simultaneously
Y-Z is calculated, and unit is dB so that in the band of band filter, ground noise is down to design requirement.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410188358.1A CN104007662B (en) | 2014-05-07 | 2014-05-07 | One improves the radio frequency simulation conforming operation method of aerial array maximum signal to noise ratio |
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| CN201410188358.1A CN104007662B (en) | 2014-05-07 | 2014-05-07 | One improves the radio frequency simulation conforming operation method of aerial array maximum signal to noise ratio |
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| CN104007662B true CN104007662B (en) | 2017-01-04 |
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| CN114499710B (en) * | 2022-04-02 | 2022-06-21 | 成都爱瑞无线科技有限公司 | Background noise change measuring method, background noise change measuring device, background noise change measuring system, electronic device, and storage medium |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1862985A (en) * | 2005-05-11 | 2006-11-15 | 中兴通讯股份有限公司 | Power distributing method of known channel information in multi-channel multi-antenna system |
| CN101609931A (en) * | 2008-06-20 | 2009-12-23 | 电子科技大学 | Antenna array phase control technology and system thereof based on the time modulation realize |
| CN202103678U (en) * | 2011-04-11 | 2012-01-04 | 四川省无线电监测站 | Electric-controlled RF pretreatment device |
| CN102646874A (en) * | 2012-04-20 | 2012-08-22 | 电子科技大学 | Four-dimensional antenna array based on single-pole multi-throw switch |
| CN102932023A (en) * | 2012-10-10 | 2013-02-13 | 中国人民解放军63892部队 | Radar antenna pointing information transferring method and device |
| CN102983411A (en) * | 2010-07-01 | 2013-03-20 | 中国电子科技集团公司第五十四研究所 | Polarization calibration method for antenna system with automatic polarization adjustment function |
| CN203056101U (en) * | 2012-12-29 | 2013-07-10 | 南京长峰航天电子科技有限公司 | Active rapid amplitude-phase control system |
| CN203909501U (en) * | 2014-05-07 | 2014-10-29 | 中国人民解放军63892部队 | Device capable of improving consistency of maximum signal-to-noise ratio of radio-frequency simulation antenna array |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2810173A1 (en) * | 2000-06-08 | 2001-12-14 | Thomson Multimedia Sa | RADIO FREQUENCY TRANSMISSION AND / OR RECEPTION DEVICE |
| PL378709A1 (en) * | 2003-05-17 | 2006-05-15 | Quintel Technology Limited | Phased array antenna system with adjustable electrical tilt |
| JP5620757B2 (en) * | 2010-09-01 | 2014-11-05 | 株式会社豊田中央研究所 | Radar equipment |
-
2014
- 2014-05-07 CN CN201410188358.1A patent/CN104007662B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1862985A (en) * | 2005-05-11 | 2006-11-15 | 中兴通讯股份有限公司 | Power distributing method of known channel information in multi-channel multi-antenna system |
| CN101609931A (en) * | 2008-06-20 | 2009-12-23 | 电子科技大学 | Antenna array phase control technology and system thereof based on the time modulation realize |
| CN102983411A (en) * | 2010-07-01 | 2013-03-20 | 中国电子科技集团公司第五十四研究所 | Polarization calibration method for antenna system with automatic polarization adjustment function |
| CN202103678U (en) * | 2011-04-11 | 2012-01-04 | 四川省无线电监测站 | Electric-controlled RF pretreatment device |
| CN102646874A (en) * | 2012-04-20 | 2012-08-22 | 电子科技大学 | Four-dimensional antenna array based on single-pole multi-throw switch |
| CN102932023A (en) * | 2012-10-10 | 2013-02-13 | 中国人民解放军63892部队 | Radar antenna pointing information transferring method and device |
| CN203056101U (en) * | 2012-12-29 | 2013-07-10 | 南京长峰航天电子科技有限公司 | Active rapid amplitude-phase control system |
| CN203909501U (en) * | 2014-05-07 | 2014-10-29 | 中国人民解放军63892部队 | Device capable of improving consistency of maximum signal-to-noise ratio of radio-frequency simulation antenna array |
Non-Patent Citations (1)
| Title |
|---|
| 阵列式射频目标仿真系统中的目标控制方法;梁艳青 等;《航空兵器》;20070228(第1期);第36-39页 * |
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