CN208350990U - A kind of generalization radar sensing system - Google Patents
A kind of generalization radar sensing system Download PDFInfo
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- CN208350990U CN208350990U CN201820684226.1U CN201820684226U CN208350990U CN 208350990 U CN208350990 U CN 208350990U CN 201820684226 U CN201820684226 U CN 201820684226U CN 208350990 U CN208350990 U CN 208350990U
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Abstract
The utility model discloses a kind of generalization radar sensing system, including computer, the receiving front-end connecting respectively with computer, oscillograph and signal sources；When measuring transmission channel, the signal input part of receiving front-end is separately connected the signal source and dedicated antenna, and the signal output end of receiving front-end connects oscillograph；When measuring transmission channel discovery signal value greater than 0dBm, oscillograph directly passes through wave detector and connects dedicated antenna；When measuring receiving channel, signal source is connect with dedicated antenna, and the intermediate-freuqncy signal end of the signal input part connection radar of receiving front-end, the signal output end of receiving front-end connects oscillograph.The detection system of the utility model can measure the radar that frequency range is 500MHz~40GHz by configuring dedicated antenna, cover L-band, S-band, C-band, X-band, Ka wave band, Ku audio range frequency section, metre wave radar can be measured after replacement antenna, realizes the function of multiband all standing.
Description
Technical field
The utility model belongs to radar detection technique field, and in particular to a kind of generalization radar sensing system.
Background technique
With the development of Radar Technology, radar has developed into the multiple types such as meteorology, search, fire control, warning, with radar
Device category and quantity increase, and maintenance and guarantee will become a big difficulty.Due to the particularity of radar equipment, demand radio frequency side
The specialized equipment in face, but above equipment is expensive, and bulky, power consumption is serious, does not have the use condition in outfield.Separately
Outside, above equipment portable can not carry, and can not achieve fast failure positioning.Especially, above equipment is directed to specific frequency
Section and radar do not have versatility, and therefore, the inconvenience of radar support has become the obstruction for promoting combat effectiveness of the troops.
Utility model content
The purpose of this utility model is that: above-mentioned deficiency in the prior art is solved, a kind of generalization detections of radar is provided
System can measure amplitude, frequency, pulse width, the repetition period parameter of radar emission signal, waveform, the frequency of displayable signal
Spectrum；Also can measure the local oscillator of radar receiving channel, noise source, in the performances of components such as put, cover transmitter, receiver it is each
A component can navigate to the failure of widget.
To achieve the goals above, the technical solution adopted in the utility model are as follows:
A kind of generalization radar sensing system, including computer, the receiving front-end being connect respectively with the computer, oscillography
Device and signal source；
When instrumentation radar transmission channel, the signal input part of the receiving front-end is separately connected the signal source and dedicated
The signal output end of antenna, the receiving front-end connects oscillograph；
When instrumentation radar transmission channel discovery signal value is greater than 0dBm, the oscillograph directly passes through wave detector and connects institute
State dedicated antenna；
When instrumentation radar receiving channel, the signal source is connect with the dedicated antenna, the signal of the receiving front-end
Input terminal connects the intermediate-freuqncy signal end of radar, and the signal output end of the receiving front-end connects the oscillograph.
Further, in instrumentation radar transmission channel, if radar emission wave band is Ka wave band, the receiving front-end and institute
It states and is also connected with a frequency multiplier between signal source, the signal input part of the frequency multiplier connects the letter of the signal source by isolator
Number output end, the signal output end of the frequency multiplier are sequentially connected attenuator, filter and the receiving front-end, the frequency multiplier
Input frequency range be 15GHz to 20GHz, the reference frequency output of the frequency multiplier is 30GHz to 40GHz, the frequency multiplication
The output factors of device inhibit to be greater than or equal to 60dB.
Further, in instrumentation radar receiving channel, if radar receiving wave range is Ka wave band, the signal source and described
A frequency multiplier is also connected between dedicated antenna, the signal input part of the frequency multiplier connects the letter of the signal source by isolator
Number output end, the signal output end of the frequency multiplier are sequentially connected attenuator, filter and the receiving front-end, the frequency multiplier
Input frequency range be 15GHz to 20GHz, the reference frequency output of the frequency multiplier is 30GHz to 40GHz, the frequency multiplication
The output factors of device inhibit to be greater than or equal to 60dB.
Further, when measuring noise source, the signal input part of the receiving front-end be separately connected signal source and with make an uproar
The output end of the matched noise source signal port of sound source wave band, the receiving front-end connects the oscillograph.
Further, when measuring noise source, if noise source wave band is Ka wave band, the signal source and the receiving front-end
Between be also connected with a frequency multiplier, the signal input part of the frequency multiplier is exported by the signal that isolator connects the signal source
End, the signal output end of the frequency multiplier are sequentially connected attenuator, filter and the receiving front-end, the input of the frequency multiplier
Frequency range is 15GHz to 20GHz, and the reference frequency output of the frequency multiplier is 30GHz to 40GHz, the frequency multiplier it is defeated
Spurious reduction is greater than or equal to 60dB out.
Further, it is equipped with signal source reserve battery in above-mentioned signal source, is respectively equipped in the wave detector and frequency multiplier
Corresponding module for power supply battery.
Further, a spare module reserve battery is further respectively had in above-mentioned wave detector and frequency multiplier.
Further, above-mentioned generalization radar sensing system further includes antenna fixing stand, the antenna fixing stand packet
A-frame is included, the A-frame is equipped with telescopic rod, and the top of the telescopic rod connects balancing pole, institute by rotating basis
Stating balancing pole includes Special hoist line segment balancing pole, Metric wave aerial section balancing pole and leveling bar, the leveling bar and Special hoist line segment
Balancing pole is connected by fixed screw, and the Special hoist line segment balancing pole connects Metric wave aerial section balancing pole by fixed screw,
The described one end of leveling bar far from rotating basis connects cross eyeglass by the fixed bracket of cross eyeglass, and the Special hoist line segment is flat
Bar weigh by the fixed dedicated antenna antenna of fixed screw, the Metric wave aerial section balancing pole is fixed by the fixed bracket of Metric wave aerial
The optical foresight of Metric wave aerial, the cross eyeglass and tested radar is located at same horizontal line, and the dedicated antenna is in level
Away from 900 millimeters of cross eyeglass on direction, the dedicated antenna is vertically lower than 100 millimeters of cross eyeglass, the metric wave
Antenna and cross eyeglass are located at same horizontal line, and the Metric wave aerial is away from 1715 millimeters of cross eyeglass.
Further, the input detection power bracket of above-mentioned wave detector is -30dBm to+15dBm, the essence of the wave detector
True response range is 0.5GHz to 43.5GHz.
Further, above-mentioned receiving front-end includes first connect respectively with Ka signal input part and Ku signal input part
SPDT switch, the signal output end of first SPDT switch are sequentially connected attenuator, second filter and the 2nd SPDT and open
It closes, the signal output end of second SPDT switch is separately connected road output circuit and lower road output circuit, and the upper road is defeated
Circuit includes and the sequentially connected attenuator of the second SPDT switch, third SPDT switch, amplifier, third filter, absorption out
Formula spst switch ADG901 and output share end, and another signal input part of second SPDT switch connects external test signal
Input terminal；The lower road output circuit includes and the sequentially connected attenuator of the second SPDT switch, the second amplifier, controllable gain
Amplifier, second detector, relay, isolation inductance and the public end of output, the controllable gain amplifier pass through DAC converter
Connect digital signal input end.
By adopting the above-described technical solution, the beneficial effects of the utility model are:
The detection system of the utility model is broadly divided into two parts to the detection of radar system: first is that being set using detections of radar
Standby antenna electromagnetic signals check whether radar receiving channel is normal；Second is that receiving radar emission channel using antenna
Electromagnetic wave signal, check radar emission channel it is whether normal；The amplitude, frequency, pulse that signal can be emitted with instrumentation radar are wide
Degree, repetition period parameter, waveform, the frequency spectrum of displayable signal；Also can measure the local oscillator of radar receiving channel, noise source, in put
The performance of equal components, covers all parts of transmitter, receiver, can navigate to the failure of widget.
The detection system of the utility model is 500MHz~40GHz's by configuring dedicated antenna to can measure frequency range
Radar, i.e. covering L-band, S-band, C-band, X-band, Ka wave band, Ku audio range frequency section, can measure metric wave after replacing antenna
Radar realizes the function of multiband all standing；
The detection system of the utility model is equipped with independent power-supply system to adapt to a variety of operative scenarios；
The detection system of the utility model is furnished with specific antenna fixing stand, improves the precision of detections of radar, convenient
The installation of detection system；
Because using combination, an equipment may be used repeatedly the utility model in measuring multiple projects, save
Cost-saving.
Detailed description of the invention
It, below will be to use required in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment
Attached drawing be briefly described, it should be understood that the following drawings illustrates only some embodiments of the utility model, therefore should not be by
Regard the restriction to range as, for those of ordinary skill in the art, without creative efforts, may be used also
To obtain other relevant attached drawings according to these attached drawings.
Fig. 1 is the detecting and controlling system schematic diagram of the utility model.
Fig. 2 is that the Ku band radar transmission channel of the utility model measures connection schematic diagram.
Fig. 3 is the Ku wave band pulsewidth amplitude measurement connection schematic diagram of the utility model.
Fig. 4 is that the Ka band radar transmission channel of the utility model measures connection schematic diagram.
Fig. 5 is the Ka wave band pulsewidth amplitude measurement connection schematic diagram of the utility model.
Fig. 6 is that the Ku band radar receiving channel of the utility model measures connection schematic diagram.
Fig. 7 is that the Ka band radar receiving channel of the utility model measures connection schematic diagram.
Fig. 8 is that the Ku wave band intermediate-freuqncy signal of the utility model measures connection schematic diagram.
Fig. 9 is that the Ka wave band intermediate-freuqncy signal of the utility model measures connection schematic diagram.
Figure 10 is the frequency multiplier circuit connection schematic diagram of the utility model.
Figure 11 is the frequency multiplier NC1797C-3040 power relation schematic diagram of the utility model.
Figure 12 is that the frequency multiplier NC1797C-3040 harmonics restraint of the utility model illustrates intention.
Figure 13 is the receiving front-end circuit connection schematic diagram of the utility model.
Specific embodiment
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Usually here in attached drawing description and
The component of the utility model embodiment shown can be arranged and be designed with a variety of different configurations.
Therefore, requirement is not intended to limit to the detailed description of the embodiments of the present invention provided in the accompanying drawings below
The scope of the utility model of protection, but it is merely representative of the selected embodiment of the utility model.Based in the utility model
Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all
Belong to the range of the utility model protection.
As shown in figures 1-13, a kind of generalization radar sensing system, including computer are connect with the computer respectively
Receiving front-end, oscillograph and signal source；
When instrumentation radar transmission channel, the signal input part of the receiving front-end is separately connected the signal source and dedicated
The signal output end of antenna, the receiving front-end connects oscillograph；
When instrumentation radar transmission channel discovery signal value is greater than 0dBm, the oscillograph directly passes through wave detector and connects institute
State dedicated antenna；
When instrumentation radar receiving channel, the signal source is connect with the dedicated antenna, the signal of the receiving front-end
Input terminal connects the intermediate-freuqncy signal end of radar, and the signal output end of the receiving front-end connects the oscillograph.
Further, in instrumentation radar transmission channel, if radar emission wave band is Ka wave band, the receiving front-end and institute
It states and is also connected with a frequency multiplier between signal source, the signal input part of the frequency multiplier connects the letter of the signal source by isolator
Number output end, the signal output end of the frequency multiplier are sequentially connected attenuator, filter and the receiving front-end, the frequency multiplier
Input frequency range be 15GHz to 20GHz, the reference frequency output of the frequency multiplier is 30GHz to 40GHz, the frequency multiplication
The output factors of device inhibit to be greater than or equal to 60dB.
Further, in instrumentation radar receiving channel, if radar receiving wave range is Ka wave band, the signal source and described
A frequency multiplier is also connected between dedicated antenna, the signal input part of the frequency multiplier connects the letter of the signal source by isolator
Number output end, the signal output end of the frequency multiplier are sequentially connected attenuator, filter and the receiving front-end, the frequency multiplier
Input frequency range be 15GHz to 20GHz, the reference frequency output of the frequency multiplier is 30GHz to 40GHz, the frequency multiplication
The output factors of device inhibit to be greater than or equal to 60dB.
Further, when measuring noise source, the signal input part of the receiving front-end be separately connected signal source and with make an uproar
The output end of the matched noise source signal port of sound source wave band, the receiving front-end connects the oscillograph.
Further, when measuring noise source, if noise source wave band is Ka wave band, the signal source and the receiving front-end
Between be also connected with a frequency multiplier, the signal input part of the frequency multiplier is exported by the signal that isolator connects the signal source
End, the signal output end of the frequency multiplier are sequentially connected attenuator, filter and the receiving front-end, the input of the frequency multiplier
Frequency range is 15GHz to 20GHz, and the reference frequency output of the frequency multiplier is 30GHz to 40GHz, the frequency multiplier it is defeated
Spurious reduction is greater than or equal to 60dB out.
Further, it is equipped with signal source reserve battery in above-mentioned signal source, is respectively equipped in the wave detector and frequency multiplier
Corresponding module for power supply battery.
Further, a spare module reserve battery is further respectively had in above-mentioned wave detector and frequency multiplier.
Further, above-mentioned generalization radar sensing system further includes antenna fixing stand, the antenna fixing stand packet
A-frame is included, the A-frame is equipped with telescopic rod, and the top of the telescopic rod connects balancing pole, institute by rotating basis
Stating balancing pole includes Special hoist line segment balancing pole, Metric wave aerial section balancing pole and leveling bar, the leveling bar and Special hoist line segment
Balancing pole is connected by fixed screw, and the Special hoist line segment balancing pole connects Metric wave aerial section balancing pole by fixed screw,
The described one end of leveling bar far from rotating basis connects cross eyeglass by the fixed bracket of cross eyeglass, and the Special hoist line segment is flat
Bar weigh by the fixed dedicated antenna antenna of fixed screw, the Metric wave aerial section balancing pole is fixed by the fixed bracket of Metric wave aerial
The optical foresight of Metric wave aerial, the cross eyeglass and tested radar is located at same horizontal line, and the dedicated antenna is in level
Away from 900 millimeters of cross eyeglass on direction, the dedicated antenna is vertically lower than 100 millimeters of cross eyeglass, the metric wave
Antenna and cross eyeglass are located at same horizontal line, and the Metric wave aerial is away from 1715 millimeters of cross eyeglass.
Further, the input detection power bracket of above-mentioned wave detector is -30dBm to+15dBm, the essence of the wave detector
True response range is 0.5GHz to 43.5GHz.
Further, above-mentioned receiving front-end includes first connect respectively with Ka signal input part and Ku signal input part
SPDT switch, the signal output end of first SPDT switch are sequentially connected attenuator, second filter and the 2nd SPDT and open
It closes, the signal output end of second SPDT switch is separately connected road output circuit and lower road output circuit, and the upper road is defeated
Circuit includes and the sequentially connected attenuator of the second SPDT switch, third SPDT switch, amplifier, third filter, absorption out
Formula spst switch ADG901 and output share end, and another signal input part of second SPDT switch connects external test signal
Input terminal；The lower road output circuit includes and the sequentially connected attenuator of the second SPDT switch, the second amplifier, controllable gain
Amplifier, second detector, relay, isolation inductance and the public end of output, the controllable gain amplifier pass through DAC converter
Connect digital signal input end.
Detections of radar equipment in the utility model is mainly used for quickly checking radar transmit-receive function and performance, just
It is positioned and is repaired in the failure occurred to radar front end with feeder line related device.
Detections of radar equipment is broadly divided into two parts to the detection of radar system: first is that utilizing the antenna of detections of radar equipment
Electromagnetic signals check whether radar receiving channel is normal；Second is that receiving the electromagnetic wave in radar emission channel using antenna
Signal checks whether radar emission channel is normal.
The key technical indexes of detections of radar equipment in the present embodiment see the table below 1:
In the present embodiment, the operating temperature range of detections of radar equipment is -25 DEG C~+55 DEG C, humidity≤90%, before use
Should check whether cable connection is correct.
Before use, should check whether battery capacity is enough, whether cable is complete；Module for power supply battery USB is exported
End connects good, opening module for power supply battery power switch, module for power supply battery capacity indicator light by male to male USB patchcord
It ignites；Tripod is opened, tripod is fixed, fixed device is fixed according to the level meter that tripod carries, and by Ka, Ku days
Line and cross eyeglass install respectively.
It is that signal source supplies with signal source battery as shown in Figure 1, oscillograph, signal source, computer are connected with receiving front-end
Electricity opens battery power switch, opening signal source current switch；Computer is opened, software will read facility information automatically；It opens
Oscillograph, when measuring intermediate frequency spectrum, it is 200MHz that sample frequency, which need to be arranged,.
When measuring Ku band radar transmission channel, each device is connected according to structure shown in Fig. 2, then opens radar hair
Machine is penetrated, emits Ku wave band electromagnetic wave signal, then opening signal source, setting signal source output power is+13dBm, adjusts output
Frequency, since 12.0GHz, with 100MHz stepping, spectrogram in observation oscilloscope, until frequency spectrograph 60MHz frequency point measures
Larger signal stops adjusting frequency, and the frequency values one decimal of reservation is input in [emission measurement-channel Ku] and [receives frequency
Rate] column；Remove receiving front-end, as shown in Figure 3 connecting components, operation oscillograph reads the width of pulse, amplitude, repeats week
Phase.When amplitude data is read, select the preferable horizontal position of flatness as valid data；After the pulse-width data measured is rounded
It is input to [pulse width] column in [emission measurement-channel Ku], repetition period data are input to [emission measurement-channel Ku]
In [repetition period] column, be input to [detecting circuit] column in [emission measurement-channel Ku] after amplitude data is rounded, obtain [hair
Penetrate power] data, and output test result --- acceptance or rejection is then shut off transmitter, shutdown signal source.
When measuring Ka band radar transmission channel, according to Fig. 4 martingale, radar transmitter, transmitting Ka wave band electricity are opened
Magnetostatic wave signal；Opening signal source, setting signal source output power are+13dBm, adjust output frequency, since 16.5GHz, with
100MHz stepping, spectrogram in observation oscilloscope stop adjusting frequency until frequency spectrograph 60MHz frequency point measures larger signal,
The frequency values one decimal of reservation is input in [emission measurement-channel Ka] and [receives frequency] column；Remove receiving front-end, presses
Connecting components shown in Fig. 5, operation oscillograph read the width of pulse, amplitude, repetition period.When amplitude data is read, selection
The preferable horizontal position of flatness as valid data, will the pulse-width data that measured be rounded after be input to that [emission measurement-Ka is logical
Road] in [pulse width] column, repetition period data are input to [repetition period] column in [emission measurement-channel Ka], by amplitude
Data are input to [detecting circuit] column in [emission measurement-channel Ka] after being rounded, obtain [transmission power] data, and export survey
Test result --- acceptance or rejection is then shut off transmitter.
When measuring Ku band radar receiving channel, according to Fig. 6 martingale, opens radar and receive, opening signal source, setting
Output frequency is 12.0GHz and output power 10dBm, emits Ku wave band electromagnetic wave signal；Output frequency is adjusted, is walked with 100MHz
Into spectrogram in observation oscilloscope, until frequency spectrograph 60MHz frequency point measures larger signal, stopping adjusts frequency, reads frequency
The rounding of spectrometer performance number is input in [intermediate-freuqncy signal] [frequency spectrograph power] column, and transmission power data are inputted in [intermediate-freuqncy signal]
[transmission power] column, software output test result --- acceptance or rejection；It is then shut off receiver, shutdown signal source.
When measuring Ka band radar receiving channel, according to Fig. 7 martingale, opens radar and receive, opening signal source, setting
Output frequency is 16.5GHz and output power 10dBm, emits Ku wave band electromagnetic wave signal；Output frequency is adjusted, is walked with 100MHz
Into spectrogram in observation oscilloscope, until frequency spectrograph 60MHz frequency point measures larger signal, stopping adjusts frequency, reads frequency spectrum
The rounding of instrument performance number is input in [intermediate-freuqncy signal] [frequency spectrograph power] column, and transmission power data are inputted in [intermediate-freuqncy signal]
[transmission power] column, software output test result --- acceptance or rejection；It is then shut off receiver, shutdown signal source.
When measuring Ku band noise source, according to Fig. 8 martingale, opening signal source, setting signal source output power is+
13dBm adjusts output frequency, since 12.0GHz, with 100MHz stepping, and spectrogram in observation oscilloscope, until frequency spectrograph
60MHz frequency point measures larger signal, stops adjusting frequency, readout power value is input to [noise testing-Ku wave band] after being rounded
In [close noise source power] column；Ku noise source is opened, performance number at this time is read, [noise testing-Ku wave is input to after rounding
Section] in [open noise source power]；Software outputs test result-acceptance or rejection；It is then shut off Ku noise source, closes letter
Number source.
When measuring Ka band noise source, according to Fig. 9 martingale, opening signal source, setting signal source output power is+
13dBm adjusts output frequency, since 16.5GHz, with 100MHz stepping, and spectrogram in observation oscilloscope, until frequency spectrograph
60MHz frequency point measures larger signal, stops adjusting frequency, readout power value is input to [noise testing-Ka wave band] after being rounded
In [close noise source power] column；Ku noise source is opened, performance number at this time is read, [noise testing-Ka wave is input to after rounding
Section] in [open noise source power]；Software outputs test result-acceptance or rejection；It is then shut off Ka noise source, closes letter
Number source.
Signal source: signal source adapter or battery are available for electricity, and there are adapter when alternating current, environment not to have alternating current for environment
Shi Caiyong signal source reserve battery and the use of mating DQY17022-DL-07 cable；
Wave detector and frequency multiplier: when wave detector or frequency multiplier is used alone, being powered using battery, mating DQY17022-
DL-11 or DQY17022-DL-12 cable uses；When frequency multiplier and wave detector need to power simultaneously, mating DQY17022-DL-13 electricity
Cable；
Receiving front-end: using computer power supply, and mating DQY17022-DL-11 or 12 cable of DQY17022-DL- use.
As shown in Figure 10, NC1797C-3040 varactor doubler is selected to carry out frequency multiplication output to input radio frequency signal.
As shown in figure 11, the output power of frequency multiplier NC1797C-3040 is up to 15dBm, subtracts rear class attenuator and filter
The Insertion Loss 5dB of wave device meets the demanded power output of the > 0dBm of protocol requirement.
As shown in figure 12, output harmonic wave inhibition >=35dB of frequency multiplier NC1797C-3040, the harmonic wave suppression of rear class filtering device
System >=50dB, therefore the minimum 35+50=85dB of total harmonics restraint, meet protocol requirement >=the spurious reduction requirement of 60dB.
ADL6010 envelope detector is selected to carry out detection output to input radio frequency signal, wave detector ADL6010 is accurately rung
Answering range is 0.5GHz~43.5GHz, meets 2~38GHz frequency range of protocol requirement.Wave detector ADL6010 inputs detection
Power bracket is -30dBm~+15dBm, meets the requirement of -5~+15dBm input power of index request, and can provide+
The calibration value of output voltage when 10dBm is inputted.Wave detector ADL6010 exports the instantaneous amplitude of baseband voltage and input signal at just
Than, and when input >=-5dBm, deviation≤± 0.7dB in operating temperature range, therefore meet the requirement of detection precision.Wave detector
The operating temperature ratings range of ADL6010A is -40 DEG C~+85 DEG C, meets -40 DEG C~+50 DEG C operating temperatures of index request
Range.
As shown in figure 13, the selection that intermediate-freuqncy signal is exported to Ka, Ku down coversion is realized by switching, later through filtering
Wave device filters out humorous clutter, and export two-way using SPDT switch: decaying, amplification, the filtering of signal are passed through in upper road, make output level
Meet peak-to-peak value Vpp=1V, SPDT switch is added before upper road amplifier, intermediate frequency input or external test signal may be selected
Input；The noise power of input module can be detected by amplifier, attenuator, controllable gain amplifier and wave detector in lower road.
The 0dBm intermediate-freuqncy signal of switch is input to after down coversion, by switch, filter and attenuator insertion loss it
Afterwards, the gain of signal decaying about 14.5dB, amplifier BIF3 are 20.5dB, and the loss that rear class filtering device increases pass has 2dB altogether, therefore
Export the power of AC signal are as follows: 0-14.5+20.5-2=4dBm, i.e. output Vpp=1V.
After amplifier BIF3 plus bandpass filter, harmonics restraint >=50dB can generate amplifier in nonlinear state
Harmonic wave effectively curb.
Filter 0.5dB bandwidth is 10MHz, and link other devices 10MHz bandwidth flatness is about 0.3dB, therefore intermediate frequency is defeated
1dB bandwidth satisfaction >=10MHz requirement out.
Externally input 60MHz tests signal, humorous by amplifier itself harmonics restraint (about 30dB inhibition) and filter
After wave inhibits (>=50dB inhibition), harmonics restraint satisfaction >=60dB requirement can be made.
The noise signal levels of Ka/Ku input port are about -90dBm, and the conversion gain of evaluation board is about 8dB, by opening
It closes, after the insertion loss of filter and attenuator, signal is decayed about 6dB, the total 41dB of the gain of dual-stage amplifier BIF3, two-stage
Decay to 3dB between amplifier, thus controllable gain amplifier input end signal power are as follows: -90+8-6+41-3=-50dBm, it can
The gain ranging for controlling gain amplifier is 7.5~55.5dB, therefore the power of controllable gain amplifier output end is -42.5~﹢
5.5dBm meets RF detection power -30~-15dBm requirement.Rear class adds wave detector AD8318 (- 60~﹢ of power-level detector range
5dBm), meet index request.
For guarantee alternating current-direct current two-way output signal can common port, and alternating current-direct current two paths of signals will have enough isolation,
Therefore exported: when AC signal output, being made at absorption spst switch ADG901 by controlling level in the following way
In on state, relay G5V-1 is in an off state, and AC signal can be exported by output comm port, and due to isolation
The isolation of inductance and relay, the AC signal for being leaked to wave detector output end can be ignored.When the output of direct current rectified signal,
It is in an off state absorption SPST switch ADG901 by controlling level, relay G5V-1 is in the conductive state, direct current
Signal, from public end output is exported, is in an off state due to switching at this time after relay and isolation inductance, therefore export
Direct current signal will not leak to alternating current path.Since switch selects absorption-type single monopole single throw switch, off-state return loss is about
22dB, in addition the inhibition of ac circuit amplifier reverse isolation and attenuator is reflected into when switch is in an off state
The power of other ports is negligible.Thus, it can be achieved that alternating current-direct current signal common port, and it is mutually isolated.
The input of Ka or Ku frequency band signals is selected by switching, exchange letter is exported by primary link after main signal is downconverted
Number, direct current signal, primary link and detection link are exported by detection link after noise signal is downconverted and realize switching by switch,
The alternating current-direct current signal common port of two links output.
That is component totally four kinds of operating modes:
Mode one: switching to Ka frequency range is inputted, after Ka frequency range radio frequency main signal is downconverted extremely by switching
Primary link output.
A) radio-frequency input signals frequency: 35~38GHz
B) radio-frequency input signals power: -10dBm
C) local oscillator input signals power: 8 ± 1dBm
D) IF output signal frequency: 60MHz
E) IF output signal 1dB bandwidth: >=10MHz
F) IF output signal power: 4 ± 1dBm (Vpp ≈ 1V)
G) IF output signal spurious reduction: >=60dB
Mode two: switching to Ku frequency range is inputted, after Ku frequency range radio frequency main signal is downconverted extremely by switching
Primary link output.
A) radio-frequency input signals frequency: 10~16GHz
B) radio-frequency input signals power: -10dBm
C) local oscillator input signals power :+10 ± 1dBm
D) IF output signal frequency: 60MHz
E) IF output signal 1dB bandwidth: >=10MHz
F) IF output signal power: 4 ± 1dBm (Vpp ≈ 1V)
G) IF output signal spurious reduction: >=60dB
Mode three: switching to Ka frequency range is inputted, by switching after Ka frequency range radio noise signal is downconverted
It is exported to detection link.
A) radio frequency input noise signal frequency: 35~38GHz
B) radio frequency input noise signal power: -90dBm
C) the radio noise signal of input is downconverted to intermediate frequency 60MHz by detection link, and detection exports DC voltage, inspection
Wave power is -30~-15dBm.
Mode four: switching to Ku frequency range is inputted, by switching after Ku frequency range radio noise signal is downconverted
It is exported to detection link.
A) radio frequency input noise signal frequency: 10~16GHz
B) radio frequency input noise signal power: -90dBm
C) the radio noise signal of input is downconverted to intermediate frequency 60MHz by detection link, and detection exports DC voltage, inspection
Wave power is -30~-15dBm.
Four kinds of mode common output ends.
5) external test signal function
Test signal input port is added in primary link, is inputted by switching intermediate-freuqncy signal and external test signal.
A) test signal inputs frequency: 60MHz
B) signal maximal input :≤+ 20dBm is tested
C) output factors inhibit: >=60dB (input power is tested under the conditions of being 0dBm).
Claims (10)
1. a kind of generalization radar sensing system, it is characterised in that: including computer, the reception that is connect respectively with the computer
Front end, oscillograph and signal source；
When instrumentation radar transmission channel, the signal input part of the receiving front-end is separately connected the signal source and Special hoist
The signal output end of line, the receiving front-end connects oscillograph；
When instrumentation radar transmission channel discovery signal value be greater than 0dBm when, the oscillograph directly pass through wave detector connect it is described specially
Use antenna；
When instrumentation radar receiving channel, the signal source is connect with the dedicated antenna, the signal input of the receiving front-end
The intermediate-freuqncy signal end of end connection radar, the signal output end of the receiving front-end connect the oscillograph.
2. a kind of generalization radar sensing system according to claim 1, it is characterised in that: in instrumentation radar transmission channel
When, if radar emission wave band is Ka wave band, a frequency multiplier, the frequency multiplication are also connected between the receiving front-end and the signal source
The signal input part of device connects the signal output end of the signal source by isolator, and the signal output end of the frequency multiplier is successively
Connecting attenuator, filter and the receiving front-end, the input frequency range of the frequency multiplier is 15GHz to 20GHz, described times
The reference frequency output of frequency device is 30GHz to 40GHz, and the output factors of the frequency multiplier inhibit to be greater than or equal to 60dB.
3. a kind of generalization radar sensing system according to claim 1, it is characterised in that: in instrumentation radar receiving channel
When, if radar receiving wave range is Ka wave band, a frequency multiplier, the frequency multiplication are also connected between the signal source and the dedicated antenna
The signal input part of device connects the signal output end of the signal source by isolator, and the signal output end of the frequency multiplier is successively
Connecting attenuator, filter and the receiving front-end, the input frequency range of the frequency multiplier is 15GHz to 20GHz, described times
The reference frequency output of frequency device is 30GHz to 40GHz, and the output factors of the frequency multiplier inhibit to be greater than or equal to 60dB.
4. a kind of generalization radar sensing system according to claim 1, it is characterised in that: when measuring noise source, institute
State receiving front-end signal input part be separately connected signal source and with the matched noise source signal port of noise source wave band, it is described to connect
The output end for receiving front end connects the oscillograph.
5. a kind of generalization radar sensing system according to claim 4, it is characterised in that: when measuring noise source, if
Noise source wave band is Ka wave band, and a frequency multiplier, the letter of the frequency multiplier are also connected between the signal source and the receiving front-end
Number input terminal connects the signal output end of the signal source by isolator, and the signal output end of the frequency multiplier, which is sequentially connected, to decline
Subtract device, filter and the receiving front-end, the input frequency range of the frequency multiplier is 15GHz to 20GHz, the frequency multiplier
Reference frequency output is 30GHz to 40GHz, and the output factors of the frequency multiplier inhibit to be greater than or equal to 60dB.
6. a kind of generalization radar sensing system according to claim 1, it is characterised in that: be equipped with letter in the signal source
Number source reserve battery is respectively equipped with corresponding module for power supply battery in the wave detector and frequency multiplier.
7. a kind of generalization radar sensing system according to claim 6, it is characterised in that: the wave detector and frequency multiplier
Inside further respectively have a spare module reserve battery.
8. a kind of generalization radar sensing system according to claim 1, it is characterised in that: the generalization detections of radar
System further includes antenna fixing stand, and the antenna fixing stand includes A-frame, and the A-frame is equipped with telescopic rod,
The top of the telescopic rod connects balancing pole by rotating basis, and the balancing pole includes Special hoist line segment balancing pole, metric wave day
Line segment balancing pole and leveling bar, the leveling bar are connected with Special hoist line segment balancing pole by fixed screw, the dedicated antenna
Section balancing pole connects Metric wave aerial section balancing pole by fixed screw, and the leveling bar passes through cross far from one end of rotating basis
The fixed bracket of eyeglass connects cross eyeglass, and the Special hoist line segment balancing pole passes through the fixed dedicated antenna antenna of fixed screw, institute
It states Metric wave aerial section balancing pole and passes through the fixed Metric wave aerial of the fixed bracket of Metric wave aerial, the light of the cross eyeglass and tested radar
It learns sighting device and is located at same horizontal line, the dedicated antenna is in the horizontal direction away from 900 millimeters of cross eyeglass, the Special hoist
Line is vertically lower than 100 millimeters of cross eyeglass, and the Metric wave aerial and cross eyeglass are located at same horizontal line, the rice
Wave antenna is away from 1715 millimeters of cross eyeglass.
9. a kind of generalization radar sensing system according to claim 1, it is characterised in that: the input of the wave detector is examined
Wave power range is -30dBm to+15dBm, and the accurate response range of the wave detector is 0.5GHz to 43.5GHz.
10. a kind of generalization radar sensing system according to claim 1, it is characterised in that: the receiving front-end includes
The first SPDT switch being connect respectively with Ka signal input part and Ku signal input part, the signal output of first SPDT switch
End is sequentially connected attenuator, second filter and the second SPDT switch, and the signal output end of second SPDT switch connects respectively
Road output circuit and lower road output circuit are connected, the upper road output circuit includes and the sequentially connected decaying of the second SPDT switch
Device, third SPDT switch, amplifier, third filter, absorption spst switch ADG901 and output, which share, holds, and described second
Another signal input part of SPDT switch connects external test signal input terminal；The lower road output circuit includes and the 2nd SPDT
Switch sequentially connected attenuator, the second amplifier, controllable gain amplifier, second detector, relay, isolation inductance and defeated
Public end out, the controllable gain amplifier connect digital signal input end by DAC converter.
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| CN201820684226.1U CN208350990U (en) | 2018-05-08 | 2018-05-08 | A kind of generalization radar sensing system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110085090A (en) * | 2019-04-25 | 2019-08-02 | 中国民航大学 | A kind of airborne weather radar system teaching test stand |
| CN110988830A (en) * | 2020-01-03 | 2020-04-10 | 零八一电子集团有限公司 | Multi-frequency-band radar target simulator |
| CN111664740A (en) * | 2020-05-28 | 2020-09-15 | 中国人民解放军32181部队 | Passive microwave communication adapter and system |
-
2018
- 2018-05-08 CN CN201820684226.1U patent/CN208350990U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110085090A (en) * | 2019-04-25 | 2019-08-02 | 中国民航大学 | A kind of airborne weather radar system teaching test stand |
| CN110988830A (en) * | 2020-01-03 | 2020-04-10 | 零八一电子集团有限公司 | Multi-frequency-band radar target simulator |
| CN111664740A (en) * | 2020-05-28 | 2020-09-15 | 中国人民解放军32181部队 | Passive microwave communication adapter and system |
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