CN108181615A - A kind of active passive electromagnetism offsets stealthy system - Google Patents
A kind of active passive electromagnetism offsets stealthy system Download PDFInfo
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- CN108181615A CN108181615A CN201711308577.9A CN201711308577A CN108181615A CN 108181615 A CN108181615 A CN 108181615A CN 201711308577 A CN201711308577 A CN 201711308577A CN 108181615 A CN108181615 A CN 108181615A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/38—Jamming means, e.g. producing false echoes
Abstract
The invention belongs to the stealthy fields of aircraft radars, and in particular to a kind of active passive electromagnetism based on coherent radiation Characteristics Control offsets the stealthy system of Low-frequency radar, active passively to offset the super surface self-adaptive phase principle of adjustment and control perceived based on threatening environment.It is made of sensory perceptual system module, incoming wave data analysis module, information processing system module, target RCS database modules, super surface phase regulation and control module and active device control unit module；The present invention provides specific technological means and solution by proposing that active based on coherent radiation Characteristics Control offsets the stealthy system of Low-frequency radar by conjunction electromagnetism, to solve aircraft low frequency stealthing design bottleneck.Since active signal generating means need not be installed, overall complexity and cost are reduced, is provided simultaneously with adaptive characteristic, there is very big application prospect in Stealth field.
Description
Technical field
The invention belongs to the stealthy fields of aircraft radars, and in particular to a kind of active quilt based on coherent radiation Characteristics Control
Dynamic electromagnetism offsets the stealthy system of Low-frequency radar, active passively to offset the super surface self-adaptive phase tune perceived based on threatening environment
Control principle.
Background technology
With the progress of external Low-frequency radar technology, low frequency is anti-stealthy to be used to fight stealthy aircraft by more and more,
But at present Stealth shape technology and absorbing material and this two big main radar invisible of structure technology low-frequency range (2GHz with
Under) decline with obvious effects, the new Low-frequency radar stealth technology research of an urgent demand development.
Due to more slow in low-frequency range electromagnetism wave amplitude and phase change so that low-frequency range offsets stealth technology higher-frequency
Duan Gengyi is realized.At present it is existing offset stealth technology mainly by actively emit electromagnetism offset signal realization target it is stealthy, example
Electromagnetism is offseted as being artificially generated in target using relevant means in patent " a kind of monostatic radar offsets stealthy system and method "
Wave receives position in enemy's radar with target scattering field and offsets, so as to reach stealthy purpose.In addition in patent, " one kind is used to lead
Move stealthy time reversal electromagnetism and offset method " in, traditional Electromagnetic Wave Propagation technology is replaced to carry out using time reversal technology
Electromagnetism offsets, and can realize that offset equipment detaches with Stealthy Target.Although it is above-mentioned offset stealth technology have must be practical behaviour
The property made, but there is also many drawbacks.For example, installation offsets signal transmitting antenna in target, target can not be completely covered
Chief threat angular domain.If being detached in addition, offseting equipment with Stealthy Target, it is unfavorable for target stealthy real-time and reliability.
For these defects, what is developed is exactly passively to offset stealth technology, i.e., surpasses surface, phase using random electromagnetic
Gradient surpasses the structures such as surface and realizes the regulation and control that wave beam is scattered to target surface.But current this kind of electromagnetic structure primarily focuses on electromagnetism
The design of surface cell structure in itself can not obtain the passive electromagnetism for specifically surpassing surface based on electromagnetism according to existing public technology
Stealthy system implementation plan is offseted, active technique especially is loaded into electromagnetism surpasses surface texture, realizes based on threatening environment sense
The super surface self-adaptive known offsets stealthy system schema.
Active passive electromagnetism based on coherent radiation Characteristics Control offsets the stealthy system of Low-frequency radar, is for target radar
A kind of new solution with control is adjusted in the phase characteristic of scatter echo, active passive from being regulated and controled based on phase
Electromagnetism cancellation techniques carry out low frequency stealthing design to the regulation and control of electromagnetic scattering signal.
Invention content
The object of the present invention is to provide a kind of active passive electromagnetism based on coherent radiation Characteristics Control to offset Low-frequency radar
Stealthy system.The system is by the perception processing of radar wave and parameter extraction technology is threatened, using active super surface to scattering phase
Critical piece strong scattering wave is adjusted to diffusing reflection or will scatter main beam into horizontal deflection, and then realize and fly by position adjustment effect
Row device low frequency strong scattering component R CS reduces.
The present invention adopts the following technical scheme that：
A kind of active passive electromagnetism offsets the stealthy system of low frequency, by sensory perceptual system module, incoming wave data analysis module, information
Processing system modules, target RCS database modules, super surface phase regulation and control module and active device control unit module composition,
It phase excitation signal, active device control unit, loading excitation can realize active according to needed for offseting radar incoming wave generation electromagnetism
The automatic adjusument and control of super surface electromagnetic scattering phase, and then threatened in enemy and weaken or offset target scattering letter at radar
Breath；The sensory perceptual system module transforms into circuit signal by perceiving antenna reception enemy radar wave signal；Described comes
Wave data analysis module is frequency, phase, the circuit system of transmission direction information that analysis threatens radar wave；At the information
Managing system module is compared according to the parameter information of the stealthy demand of aircraft radars and incoming wave analysis system, is generated and is exported
Control the circuit system of signal；The target RCS database modules are the RCS Information Numbers of the different characteristic target pre-established
According to library；The super surface phase regulation and control module is upper strata periodic structure unit, the middle dielectric layer by loading varactor
And the back side feeding network and floor composition, can active artificial electromagnetic adaptively be regulated and controled according to outside threats radar wave information
The planar circuit system of super surface scattering phase；The active device control unit module generates, the super surface phase tune of output
Control one group of control unit of control signal needed for module.
The beneficial effects of the invention are as follows：
1. by threaten radar incoming wave it is passive perceive and parameter extraction technology, can establish threaten radar incoming wave with it is active
Artificial electromagnetic, which surpasses surface and offsets real time data between module, to be transmitted, and radar wave is threatened to perceive can be with information processing system
By technologies such as the target-seeking, passive guidances of existing antiradiation.
2. active super surface is pasted on aircraft surface, its own aerodynamic configuration is not changed, and utilize active super surface
To uniform, the random or gradient regulating and controlling effect of scattering phase, strong scattering wave is adjusted to diffusing reflection or carries out scattering wave beam
Deflection realizes that the feasibility of the real-time RCS decrements at aircraft low frequency strong scattering position is high.
3. the present invention is by proposing that active based on coherent radiation Characteristics Control offsets the stealthy system of Low-frequency radar by conjunction electromagnetism
System provides specific technological means and solution to solve aircraft low frequency stealthing design bottleneck.Due to without installing master
Dynamic signal generation apparatus, reduces overall complexity and cost, is provided simultaneously with adaptive characteristic, have in Stealth field
Very big application prospect.
Description of the drawings
The present invention shares 3 width attached drawings
Fig. 1 offsets the stealthy system basic principle block diagram of low frequency for active passive electromagnetism of the present invention；
Fig. 2 is that the active passive electromagnetism of the present invention based on phase regulation and control offsets principle schematic；
Fig. 3 offsets the stealthy system overall work process schematic of low frequency for active passive electromagnetism of the present invention.
Specific embodiment
The present invention will be further described in the following with reference to the drawings and specific embodiments.
Embodiment 1
A kind of active passive electromagnetism offsets the stealthy system of low frequency, by sensory perceptual system module, incoming wave data analysis module, information
Processing system modules, target RCS database modules, super surface phase regulation and control module and active device control unit module composition,
It phase excitation signal, active device control unit, loading excitation can realize active according to needed for offseting radar incoming wave generation electromagnetism
The automatic adjusument and control of super surface electromagnetic scattering phase, and then threatened in enemy and weaken or offset target scattering letter at radar
Breath；
The sensory perceptual system module transforms into circuit signal by perceiving antenna reception enemy radar wave signal；
The incoming wave data analysis module is the circuit for analyzing the frequency for threatening radar wave, phase, transmission direction information
System；
The information processing system module is believed according to the parameter of the stealthy demand of aircraft radars and incoming wave analysis system
Breath is compared, and generates and export the circuit system of control signal；
The target RCS database modules are the RCS information databases of the different characteristic target pre-established；
The super surface phase regulation and control module is upper strata periodic structure unit, the intermediate medium by loading varactor
Layer and the feeding network at the back side and floor composition, can adaptively regulate and control active artificial electricity according to outside threats radar wave information
Magnetic surpasses the planar circuit system of surface scattering phase；
The active device control unit module generates, controls the one of signal needed for the super surface phase regulation and control module of output
Group control unit.
It is the scattering coherent subtraction characteristic for surpassing surface using artificial electromagnetic that active passive electromagnetism based on phase regulation and control, which offsets,
For stealthy key position and emphasis angular domain is needed, surface is surpassed to the target outer surface active artificial electromagnetic of progress and is sticked.Wherein,
Active artificial electromagnetic, which surpasses surface, to be loaded in super surface cell structure using elements such as varactors, passes through biasing networks control
Varactor both end voltage processed realizes the adjusting and control of active super surface different units reflected phase, and then obtains target
Required scattering wave beam regulating effect.
Active artificial electromagnetic surpasses surface and the combination of aircraft target outer surface can be by meeting power heat, temperature shock, leaching
The environmental requirements such as rain, salt fog stick technique, also can by by active artificial electromagnetic surpass surface and aircraft target outer surface into
Row structure-function combining design technology is provided simultaneously with carrying and phase adjusting function.
Active artificial electromagnetic surpasses control signal needed for surface, and antenna can be passively perceived by broadband and receives threat radar wave letter
Number, using information processing and the software control platform of customization, analyze frequency, waveform, orientation for threatening radar wave signal etc.
Parameter, and according to target RCS database comparative analyses, generate voltage control signal needed for active super surface.
Active super surface cell reflected phase is adjusted by control circuit and biasing networks, the minute surface of target surface is dissipated
It penetrates and is changed into diffusing reflection and is scattered back so as to which radar scattering echo stronger in the range of certain angular domain is changed into average low of comparison
Stronger radar scattering echo progress wave beam forming is made it offset out chief threat angular domain by wave, to reduce target RCS.
Specific work process is as follows：
Step 1：For the stealthy demand of low frequency of typical stealthy aircraft, tested by radar cross section (RCS) and imitative
It is true to carry out the analysis of aircraft Low-frequency radar scattering mechanism and Low-frequency radar analysis of scattering, establish typical aircraft and allusion quotation
Type component Low-frequency radar scattering properties database, the database can will threaten radar wave, target low frequency scattering properties and artificial
Electromagnetism periodic structure element excitation signal carries out one-to-one correspondence processing, is target RCS databases as shown in Figure 3, is active passive
The generation of pumping signal provides data supporting needed for offseting.
Step 2：On this basis, the detection radar wave signal emitted for enemy radar system 1, passes through wideband radar
The passive sensory perceptual system of wave receives detection radar wave signal.By incoming wave data analysis module realize threaten radar incoming wave perception with
The parameters such as parameter extraction, the spatial position including frequency, phase, amplitude, waveform, polarization and radar.Wideband radar wave quilt
The realization of dynamic sensory perceptual system and wave data analysis module can be reduced by the target-seeking technologies such as with passive guidance of existing antiradiation
System realizes difficulty.
Step 3：After perceiving threat radar wave and its parameter is extracted, according to threat radar wave signal
The information such as frequency, angle, phase, amplitude are entered corresponding data in target RCS databases with this by information processing system module
It penetrates radar wave data to be compared, obtains target RCS essential characteristics, and corresponding active people is generated according to the requirement of overall Stealth Fighter
Work electromagnetism surpasses pumping signal needed for surface, and active artificial electromagnetic is controlled to surpass surface cell structure phase change on reflection, realizes target
Surface scattering phase adaptation regulates and controls.
Step 4：For the active passive electromagnetism cancellation techniques regulated and controled based on phase, by will threaten radar wave information with
Target RCS databases are compared, super surface phase regulation and control parameter needed for acquisition, and it is each that phase regulation and control requirement is passed to control
The active device control unit on super surface controls the loading of varactor on each super surface to swash by it by biasing networks
It encourages, and then obtains the super surface with phase adjusting function.Phase, which regulates and controls super surface, can make scatter radar wave in enemy radar system
Dereliction scattering wave beam at system reception antenna, and then scatter echo can not be received, it realizes stealthy.
The places different from traditional cancellation techniques are that the system schema considers system easy implementation and Stealth Fighter, adopts
Active passive electromagnetism is taken to offset stealth technology, the active passive electromagnetism regulated and controled by phase, which offsets, realizes that low frequency is stealthy.It is keeping
While excellent properties, the complexity of system is simplified, particularly under complicated Battle Field Electromagnetic, using active passive electricity
The stealthy scheme of magnetic cancellation, it is ensured that the reliability of system work.
Claims (2)
1. a kind of active passive electromagnetism offsets the stealthy system of low frequency, which is characterized in that by sensory perceptual system module, incoming wave data analysis
Module, information processing system module, target RCS database modules, super surface phase regulation and control module and active device control unit
Module forms, can phase excitation signal, active device control unit, loading excitation according to needed for offseting radar incoming wave generation electromagnetism
It realizes the automatic adjusument and control of active super surface electromagnetic scattering phase, and then is threatened in enemy and weaken or offset mesh at radar
Mark scattered information；The sensory perceptual system module transforms into circuit signal by perceiving antenna reception enemy radar wave signal；
The incoming wave data analysis module is frequency, phase, the circuit system of transmission direction information that analysis threatens radar wave；It is described
Information processing system module be to be compared according to the parameter information of the stealthy demand of aircraft radars and incoming wave analysis system, production
Give birth to and export the circuit system of control signal；The target RCS database modules are the different characteristic targets pre-established
RCS information databases；Described super surface phase regulation and control module be by loading varactor upper strata periodic structure unit, in
Between the feeding network at dielectric layer and the back side and floor composition, can adaptively be regulated and controled active according to outside threats radar wave information
Artificial electromagnetic surpasses the planar circuit system of surface scattering phase；The active device control unit module generates, the super table of output
One group of control unit of control signal needed for the phase regulation and control module of face.
2. a kind of active passive electromagnetism as described in claim 1 offsets the stealthy system of low frequency, which is characterized in that the system is placed
In in aircraft target, and it is conformal with aircraft, and target outer surface has sticked super surface phase regulation and control module.
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| CN111736161A (en) * | 2020-08-25 | 2020-10-02 | 中国人民解放军国防科技大学 | Static stealth target revealing method based on coherent laser radar |
| CN112731308A (en) * | 2020-12-21 | 2021-04-30 | 北京机电工程研究所 | Self-adaptive low-frequency active cancellation radar stealth implementation method |
| CN115411530A (en) * | 2022-09-01 | 2022-11-29 | 西安电子科技大学 | Electromagnetic stealth system based on photoelectric field sensor |
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Application publication date: 20180619 |