CN108493621A - A kind of pattern-band radar absorption body based on impedance load - Google Patents
A kind of pattern-band radar absorption body based on impedance load Download PDFInfo
- Publication number
- CN108493621A CN108493621A CN201810164808.1A CN201810164808A CN108493621A CN 108493621 A CN108493621 A CN 108493621A CN 201810164808 A CN201810164808 A CN 201810164808A CN 108493621 A CN108493621 A CN 108493621A
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- Prior art keywords
- frequency
- pattern
- absorption body
- band radar
- radar absorption
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q17/00—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/0006—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices
- H01Q15/0013—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices working as frequency-selective reflecting surfaces, e.g. FSS, dichroic plates, surfaces being partly transmissive and reflective
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Aerials With Secondary Devices (AREA)
- Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
Abstract
The invention discloses a kind of pattern-band radar absorption bodies based on impedance load, are related to stealth technology field.The embodiment of the present invention it is a kind of based on impedance load pattern-band radar absorption body include：Skinning layer, impedance layer, wall and the metal backing set gradually；Wherein, impedance layer includes frequency-selective surfaces and the resistance that is arranged on frequency-selective surfaces；When on electromagnetic wave irradiation to frequency-selective surfaces, the electromagnetic wave that frequency is in pass band width passes through, and the electromagnetic wave that frequency is in outside pass band width is reflected.The difficult point that the embodiment of the present invention can overcome Absorbing Materials wide with wavestrip is inhaled, absorbing property is good, and it is wide to inhale wavestrip.
Description
Technical field
The present invention relates to stealth technology fields, more particularly to the pattern-band radar absorption body based on impedance load.
Background technology
Now with the continuous development of the radar exploration technique, novel stealthy aircraft is prevented becoming to get in stealthy dash forward of pattern-band
Come more important.E-2D " Advanced Hawkeye " the early warnings machine in the U.S., pave the way pawl phased-array radar and the Wo Luonie of Russia
Distant early warning rader is operated in pattern-band, and operation principle is exactly that low frequency anti-stealth technololgy is utilized, to China's weaponry
Detection threatens very big.In low-frequency band (it is 2000MHz radio waves below to refer generally to frequency), target sizes and radar wavelength
Equally matched, the back scattering of target is non-directional, to substantially reduce the stealth effect of target.
Intensive detection in face of metre wave radar threatens, it is necessary to which it is hidden to capture low frequency for the research dynamics for increasing low frequency stealth technology
Body technical bottleneck, development of new low-frequency wave-absorbing material stealthy prominent anti-provide a kind of technological means for the low frequency of weaponry.
In place of the deficiencies in the prior art：(1) pattern-band absorbing material absorbent properties are poor；(2) suction of the absorbing material in pattern-band
Wavestrip is wider than narrow.
Invention content
The purpose of patent of the present invention is to be directed to the stealthy problem of aircraft P frequency ranges, overcomes Absorbing Materials and suction wavestrip wide
Difficult point, propose it is a kind of based on impedance load pattern-band radar absorption body, absorbing property is good, inhale wavestrip it is wide.
In order to solve the above technical problem, the present invention provides a kind of pattern-band radar absorption body based on impedance load, packets
It includes：Skinning layer, impedance layer, wall and the metal backing set gradually；Wherein, impedance layer includes frequency-selective surfaces and setting
Resistance on frequency-selective surfaces；When on electromagnetic wave irradiation to frequency-selective surfaces, frequency is in the electricity in pass band width
Magnetic wave passes through, and the electromagnetic wave that frequency is in outside pass band width is reflected.
Optionally, frequency-selective surfaces are double ring type structure.
Optionally, the twin nuclei is both sides' ring structure.
Optionally, foreign side's ring length of side of frequency-selective surfaces is 40~60mm, and interior side's ring length of side is 20~30mm.
Optionally, resistor loaded is on foreign side's ring of frequency-selective surfaces.
Optionally, the pattern-band radar absorption body includes even number resistance, and the even number resistance asymmetrical load is in frequency
On the side for selecting foreign side's ring on surface.
Optionally, resistance is Chip-R.
Optionally, the resistance value of resistance is the Ω of 1000 Ω~3000.
Optionally, frequency-selective surfaces and resistance welding；Metal backing is bonded together with wall；Wall and impedance
Layer is bonded together；Impedance layer is bonded together with skinning layer.
Implement the present invention, has the advantages that：
(1) the incidence wave electromagnetic wave being irradiated on pattern-band radar absorption body and the reflection reflected by pattern-band radar absorption body
Wave interferes, and backward energy is made to reduce, to generate stealth effect；
(2) frequency-selective surfaces of the loaded impedance layer between skinning layer and impedance layer, impedance layer have frequency filtering work(
Can, when on electromagnetic wave irradiation to frequency-selective surfaces, the electromagnetic wave that frequency is in pass band width passes through, and frequency is in
Electromagnetic wave outside pass band width is directly mirrored, and can further decrease the reflectivity of pattern-band radar absorption body；
(3) impedance layer includes resistance, by select suitable resistance may be implemented entire pattern-band radar absorption body with
The impedance matching of free space further decreases the reflectivity of pattern-band radar absorption body；
(4) frequency-selective surfaces for using double ring type structure, can increase pattern-band radar using bicyclic double resonance characteristic
The bandwidth of absorber.
Description of the drawings
Fig. 1 is the main composition schematic diagram for the pattern-band radar absorption body of the embodiment of the present invention loaded based on impedance；
Fig. 2 is the composition schematic diagram of the impedance layer of alternative embodiment of the present invention；
Fig. 3 is the reflectance curve figure of the pattern-band radar absorption body of alternative embodiment of the present invention.
In figure：1：Skinning layer；2：Impedance layer；3：Wall；4：Metal backing；5：Frequency-selective surfaces；6：Resistance.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
The every other embodiment that member is obtained without making creative work, shall fall within the protection scope of the present invention.
Fig. 1 is the main composition schematic diagram for the pattern-band radar absorption body of the embodiment of the present invention loaded based on impedance.Such as figure
Shown in 1, based on the pattern-band radar absorption body of impedance load, including：The skinning layer 1 that sets gradually, impedance layer 2,3 and of wall
Metal backing 4.In actual application, frequency-selective surfaces 5 and resistance 6 can be welded；Metal backing 4 is viscous with wall 3
It is combined；Wall 3 is bonded together with impedance layer 2；Impedance layer 2 is bonded together with skinning layer 1.
Pattern-band in the present invention refers to the radio wave of 300MHz~1000MHz.Skinning layer 1, impedance layer 2 and wall
3 can absorb part radio magnetic wave respectively, in addition, skinning layer 1 can also play support protection integrally-built to absorber
Effect.
When pattern-band radar absorption body running, electromagnetic wave is incident on skinning layer 1 first, sequentially passes through impedance layer 2 and wall
3, it is incident on 4 surface of metal backing；4 surface of metal backing generate reflection, back wave sequentially pass through wall 3, impedance layer 2,
Skinning layer 1 interferes between 1 surface echo of skinning layer and incidence wave, backward energy is made to reduce, to generate stealthy effect
Fruit.
Impedance layer 2 includes frequency-selective surfaces 5 and the resistance 6 being arranged on frequency-selective surfaces 5.
Frequency-selective surfaces 5 have the function of frequency filtering, when on electromagnetic wave irradiation to frequency-selective surfaces 5, at frequency
It is passed through in the electromagnetic wave in pass band width, the electromagnetic wave that frequency is in outside pass band width is directly mirrored.By loading frequency
Rate selects surface 5, can further decrease the reflectivity of pattern-band radar absorption body.
In some optional embodiments, frequency-selective surfaces 5 could be provided as more ring type structures, such as be arranged to bicyclic
Type structure, tricyclic structure, four ring type structures, etc..It can increase pattern-band radar using the resonance characteristic of more ring type structures to inhale
The bandwidth of acceptor.Number of rings is fewer, more easy tos produce resonance effect.Based on this, Fig. 2 shows alternative embodiment in, frequency choosing
It is double ring type structure to select surface 5.
The shape of each ring can carry out selection design according to actual conditions in more ring type structures, for example, be designed to it is round,
The shape of the rule such as regular polygon, or it is designed to that other irregular shapes being made of camber line and/or line segment, the present invention are implemented
Example is not specifically limited this.The shape of each ring can be identical or differs in more ring type structures.
Under normal circumstances, the perimeter of each ring is longer in more ring type structures, the absorption frequency of corresponding pattern-band radar absorption body
It is lower, be more conducive to the stealthing design of low-frequency range.Compared with other shapes, due to the perimeter of square structure under same harmonic period
Bigger, therefore each ring in more ring type structures can be shaped to rectangular.Fig. 2 shows alternative embodiment in, frequency
Rate selects surface 5 for both sides' ring structure.Foreign side's ring length of side of frequency-selective surfaces 5 can be 40~60mm, and interior side's ring length of side can
Think 20~30mm.By selecting suitable foreign side's ring length of side and the Nei Fang ring length of sides, pattern-band radar absorption body and oneself can be improved
By the impedance matching effect in space, make the reduction of absorption volume reflectivity.
Resistance 6 can load on the outer shroud of frequency-selective surfaces 5, can also load in its inner ring.Outer shroud herein
Refer to outermost ring, inner ring refers to innermost ring.It should be noted that when frequency-selective surfaces 5 be tool there are three or more
When the structure of multiple rings, resistance 6 can load on some ring between outer shroud and inner ring of frequency-selective surfaces 5.
Fig. 2 shows alternative embodiment in, resistance 6 load on foreign side's ring of frequency-selective surfaces 5.
The quantity of resistance 6 can carry out selection setting according to practical application scene, it is preferable that pattern-band radar absorption body packet
Even number resistance 6 is included, 6 asymmetrical load of even number resistance is on frequency-selective surfaces 5.As shown in Fig. 2, four resistance 6 load
On the side of foreign side's ring of frequency-selective surfaces 5.It should be noted that resistance 6 can also load on other rings, or wherein
A part loads on some ring, wherein another part load is on other rings, and the present invention is not specifically limited this.
In some embodiments, resistance 6 is Chip-R.Using Chip-R, corresponding pattern-band thunder on the one hand can be reduced
Up to the thickness of absorber, and then the impedance matching effect of pattern-band radar absorption body and free space is improved, makes absorption volume reflectivity
It reduces, on the other hand also allows for welding.
By selecting suitable resistance that the impedance of entire pattern-band radar absorption body and free space may be implemented
Match, further decreases the reflectivity of pattern-band radar absorption body.In order to which make pattern-band radar absorption body can absorb low-frequency range
The resistance value of radio wave, resistance 6 can be the Ω of 1000 Ω~3000.
Fig. 3 is the reflectance curve figure of the pattern-band radar absorption body of alternative embodiment of the present invention.From figure 3, it can be seen that
In 0.55GHz~1.89GHz, reflectivity is less than -6dB.
The feature that pattern-band radar absorption body absorbing property of the invention is reliable, applicability is wide has and promotes and be applicable in well
Value will produce good military benefit and economic benefit after extensive popularization and application.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, it will be understood by those of ordinary skill in the art that：It still may be used
With technical scheme described in the above embodiments is modified or equivalent replacement of some of the technical features；
And these modifications or replacements, various embodiments of the present invention technical solution that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (9)
1. a kind of pattern-band radar absorption body based on impedance load, which is characterized in that including：The skinning layer (1) that sets gradually,
Impedance layer (2), wall (3) and metal backing (4)；Wherein, impedance layer (2) includes frequency-selective surfaces (5) and setting in frequency
Rate selects the resistance (6) on surface (5)；
When on electromagnetic wave irradiation to frequency-selective surfaces (5), the electromagnetic wave that frequency is in pass band width passes through, and frequency is in
Electromagnetic wave outside pass band width is reflected.
2. pattern-band radar absorption body according to claim 1, which is characterized in that frequency-selective surfaces (5) are double ring type knot
Structure.
3. pattern-band radar absorption body according to claim 4, which is characterized in that the twin nuclei is both sides' ring structure.
4. pattern-band radar absorption body according to claim 3, which is characterized in that foreign side's ring side of frequency-selective surfaces (5)
A length of 40~60mm, interior side's ring length of side are 20~30mm.
5. pattern-band radar absorption body according to claim 3, which is characterized in that resistance (6) is loaded in frequency-selective surfaces
(5) on foreign side's ring.
6. according to claim 5 or the pattern-band radar absorption body, which is characterized in that the pattern-band radar absorption body includes
Even number resistance (6), on the side of foreign side's ring of even number resistance (6) asymmetrical load in frequency-selective surfaces (5).
7. pattern-band radar absorption body according to claim 1, which is characterized in that resistance (6) is Chip-R.
8. pattern-band radar absorption body according to claim 1, which is characterized in that the resistance value of resistance (6) be 1000 Ω~
3000Ω。
9. according to any pattern-band radar absorption bodies of claim 1-8, which is characterized in that frequency-selective surfaces (5) and electricity
Hinder (6) welding；Metal backing (4) is bonded together with wall (3)；Wall (3) is bonded together with impedance layer (2)；Resistance
Anti- layer (2) is bonded together with skinning layer (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810164808.1A CN108493621A (en) | 2018-02-27 | 2018-02-27 | A kind of pattern-band radar absorption body based on impedance load |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810164808.1A CN108493621A (en) | 2018-02-27 | 2018-02-27 | A kind of pattern-band radar absorption body based on impedance load |
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| CN108493621A true CN108493621A (en) | 2018-09-04 |
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| CN201810164808.1A Pending CN108493621A (en) | 2018-02-27 | 2018-02-27 | A kind of pattern-band radar absorption body based on impedance load |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110380228A (en) * | 2019-07-23 | 2019-10-25 | 中国科学技术大学 | A kind of wave absorbing device part based on reflectionless filter principle |
| CN114162347A (en) * | 2021-12-09 | 2022-03-11 | 北京环境特性研究所 | P-waveband low-scattering carrier and using method thereof |
| CN114204279A (en) * | 2021-12-14 | 2022-03-18 | 中南大学 | Resistance loading quad ring ultra wide band absorbing structure |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110380228A (en) * | 2019-07-23 | 2019-10-25 | 中国科学技术大学 | A kind of wave absorbing device part based on reflectionless filter principle |
| CN110380228B (en) * | 2019-07-23 | 2021-04-23 | 中国科学技术大学 | Wave absorbing device based on principle of reflection-free filter |
| CN114162347A (en) * | 2021-12-09 | 2022-03-11 | 北京环境特性研究所 | P-waveband low-scattering carrier and using method thereof |
| CN114162347B (en) * | 2021-12-09 | 2023-06-27 | 北京环境特性研究所 | P-band low-scattering carrier and application method thereof |
| CN114204279A (en) * | 2021-12-14 | 2022-03-18 | 中南大学 | Resistance loading quad ring ultra wide band absorbing structure |
| CN114204279B (en) * | 2021-12-14 | 2022-08-26 | 中南大学 | Resistance loading quad ring ultra wide band absorbing structure |
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Application publication date: 20180904 |