CN108270085A - Inhale integrated frequency-selective surfaces structure thoroughly - Google Patents
Inhale integrated frequency-selective surfaces structure thoroughly Download PDFInfo
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- CN108270085A CN108270085A CN201810178556.8A CN201810178556A CN108270085A CN 108270085 A CN108270085 A CN 108270085A CN 201810178556 A CN201810178556 A CN 201810178556A CN 108270085 A CN108270085 A CN 108270085A
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- metal patch
- selective surfaces
- frequency
- medium substrate
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- 239000002184 metal Substances 0.000 claims abstract description 51
- 229910052751 metal Inorganic materials 0.000 claims abstract description 51
- 239000000758 substrate Substances 0.000 claims abstract description 26
- 238000005452 bending Methods 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims description 6
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims 1
- 239000010931 gold Substances 0.000 claims 1
- 229910052737 gold Inorganic materials 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 abstract description 10
- 238000010521 absorption reaction Methods 0.000 abstract description 6
- 238000003780 insertion Methods 0.000 abstract description 4
- 230000037431 insertion Effects 0.000 abstract description 4
- 238000009738 saturating Methods 0.000 abstract description 4
- 230000001681 protective effect Effects 0.000 abstract description 2
- -1 Chip-R Substances 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 238000002310 reflectometry Methods 0.000 description 4
- 230000001413 cellular effect Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- 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
- H01Q15/0026—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 said selective devices having a stacked geometry or having multiple layers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/42—Housings not intimately mechanically associated with radiating elements, e.g. radome
- H01Q1/422—Housings not intimately mechanically associated with radiating elements, e.g. radome comprising two or more layers of dielectric material
Landscapes
- Aerials With Secondary Devices (AREA)
Abstract
Integrated frequency-selective surfaces structure thoroughly is inhaled the invention discloses a kind of, there are two absorption bands for tool, are made of bending strip metal patch, first kind square medium substrate, Chip-R, air layer, Second Type square medium substrate, square metal patch and square ring metal patch.The present invention's has the frequency-selective surfaces structure for inhaling a saturating bulk properties; while wide band filter with low insertion loss wave transparent in C-band is ensured; so that wave transparent frequency band is respectively provided with up and down inhales wave frequency band; wide band electromagnetic transmission control is realized with minimum size; it is very suitable for being combined with structures such as covering, shell, the protective covers of most thickness, plays its distinctive electrical property；At 0 30 degree, electromagnetic transmission characteristic keeps stablizing incident angle simultaneously.
Description
Technical field
The invention belongs to Electromagnetic Field and Microwave Technology field more particularly to a kind of saturating integrated frequency-selective surfaces structures of suction.
Background technology
In modern war, carry-on radar antenna system is important scattering source, in certain frequencies and angular field of view
Interior to have very high radar cross section (RCS), the RCS for reducing antenna system is that aircraft realizes stealthy important topic.Frequently
Rate selection surface (Frequency Selective Surface, FSS) is by a large amount of periodic arrangements, has specific shape
The two-dimensional structure that gap is formed between metal patch unit or metal flat, when incoming electromagnetic wave frequency rate is in the resonant frequency of unit
When upper, FSS shows total reflection (patch-type) or total transmissivity (aperture type), the electromagnetic wave of other frequencies can pass through FSS (patches
Type) or be totally reflected (aperture type), therefore FSS can effectively control the transmission characteristic of electromagnetic wave, be widely used in antenna house
In.
When radar working frequency range difference between ourselves and the enemy, the mixing radome technology based on FSS can realize antenna
System frequency domain it is stealthy.The frequency-selecting wave transparent antenna with interior wave transparent, with outer total reflection can be made in addition band logical FSS in antenna house
Cover, can make antenna system show different RCS characteristics inside and outside wave transparent frequency band.It is determined with interior RCS by antenna rather than antenna house
It is fixed；Except working band, RCS will be determined by the structure and shape of antenna house；At transition band, RCS is then by FSS antenna houses
With the co-determination of both antennas.FSS antenna houses have good wave transparent performance in antenna system working band, are not influencing antenna just
Often work；It except frequency band, can design, to the direction far from incoming wave, will reduce with outer reflection of radar wave by Stealth shape
With outer mono- static RCS.This FSS antenna houses by the radar incoming wave in chief threat direction by being reflected into other directions, in face of single base
Radar detection of standing can effectively realize the stealthy of antenna system.
However, this stealthy means can not achieve comprehensive stealthy, there may be very big RCS from the point of view of certain visual angles
Increase.Also gradually develop for the anti-stealth technololgy of this stealth technology defect.Wherein, bis- (more) of Radar Netting Technique are utilized
The system that base station radar or Space-based Radar system can utilize bistatic, receives the thunder that Stealthy Target scatters to other directions
Arrived wave signal detects it and is identified have very strong anti-stealthy potentiality.FSS Stealthy reflector Antenna covers are anti-stealthy to these
Technology loses stealth capabilities danger.It is a kind of that there is with interior wave transparent/frequency with outer microwave absorbing property selection for this new demand
(Frequency Selective Radome, FSR) is suggested on surface.
Integrated frequency-selective surfaces achievement in research thoroughly of inhaling most of at present is all that low frequency wave transparent/high frequency inhales wave and high frequency
Wave transparent/low frequency inhales wave FSR, and the FSR researchs for being respectively provided with microwave absorbing property up and down for wave transparent frequency band are considerably less.This is because FSR
If to have wave transparent frequency band to have the characteristic for inhaling wave frequency band up and down, the wave transparent of wave transparent frequency band cannot be influenced by inhaling wave frequency band first
Performance, it is therefore desirable to sufficiently wide matching frequency band.Ensure that constant smaller unit size disclosure satisfy that broadband again simultaneously
Interior wave transparent/microwave absorbing property has very big difficulty.Since frequency-selective surfaces are substantially a kind of wave filters in space, it is
It is capable of providing better Out-of-band rejection characteristic, should have the performance that passband both ends can inhale wave, to obtain more
Good Stealth Fighter, this integrated frequency-selective surfaces thoroughly of inhaling have in the practical applications such as Stealth design, electromagnetic shielding
Great application prospect.
Invention content
Goal of the invention：In view of the above problems, the present invention proposes a kind of suction integrated frequency-selective surfaces structure thoroughly, frequency selection
The wave transparent frequency band on surface has up and down inhales wave frequency section.
Technical solution：Purpose to realize the present invention, the technical solution adopted in the present invention are：It is a kind of to inhale a saturating body frequency
Surface texture is selected, has consumption layer, the lossless layer of intermediate air layer and lower floor comprising upper strata；
Wherein, the upper strata has consumption layer to include four the bending strip metal patches being centrosymmetric, four Chip-Rs
With one piece of first kind square medium substrate；Each metal patch is considered as a straight strip metal patch by multiple
It being formed by bending, two neighboring bending strip metal patch is connected by a Chip-R, and four Chip-Rs are identical, and four
The symmetrical center of a bending strip metal patch is aligned with the center of square medium substrate；
The lossless layer of lower floor includes two pieces of identical square metal patches, the rectangular medium base of two pieces of identical Second Types
The square ring metal patch of plate and one piece is formed, according to square metal patch, medium substrate, square ring metal patch, medium substrate, rectangular
The sequence of metal patch is arranged in order；Square ring metal patch is by a length of side rectangular patch identical with the element length of medium substrate
Piece cuts off the smaller square patch of the length of side that another center coincides with and forms, square metal patch and square ring metal patch
Center is aligned with the center of medium substrate；
It is to have certain thickness air layer that, which there is the centre of consumption layer and the lossless layer of lower floor on the upper strata, and upper strata have consumption layer and
The symmetrical centre alignment of the lossless layer of lower floor.
Further, the material of the first kind square medium substrate is Isola FR408.
Further, the material of the Second Type square medium substrate is F4BM220.
Further, the thickness of the intermediate air layer is 5mm.
Further, the length of side of the square metal patch is 9.8mm.
Further, the model 0603 of the Chip-R, resistance value are 62 ohm.
Advantageous effect：The present invention's has the frequency-selective surfaces structure for inhaling a saturating bulk properties, is ensureing wideband in C-band
While the filter with low insertion loss wave transparent of band so that wave transparent frequency band is respectively provided with up and down inhales wave frequency band, and broadband is realized with minimum size
Electromagnetic transmission control, be very suitable for being combined with structures such as covering, shell, the protective covers of most thickness, performance
Its distinctive electrical property；When 0-30 is spent, electromagnetic transmission characteristic keeps stablizing incident angle simultaneously.
Description of the drawings
Fig. 1 is the cellular construction figure that the present invention inhales integrated frequency-selective surfaces structure thoroughly；
Fig. 2 is the overall diagram that the present invention inhales integrated frequency-selective surfaces structure thoroughly, and (a) is front view, and (b) is side view；
Fig. 3 is the cellular construction figure that the present invention inhales the lossless layer of lower floor of integrated frequency-selective surfaces structure thoroughly, and (a) is whole
Broken away view, (b) are square patch schematic diagram, and (c) is square ring patch schematic diagram；
Fig. 4 be the present invention inhale reflectivity curve under the conditions of vertical incidence of integrated frequency-selective surfaces thoroughly, transmission curve and
Absorption curve figure；
Fig. 5 is suction of the invention reflectivity curve, transmission song of the integrated frequency-selective surfaces under the conditions of certain angle incidence thoroughly
Line chart, (a) are TE patterns, and (b) is TM patterns；
Fig. 6 is that the present invention inhales absorption curve figure of the integrated frequency-selective surfaces under the conditions of certain angle incidence thoroughly.
Specific embodiment
Technical scheme of the present invention is further described with reference to the accompanying drawings and examples.
As shown in Figure 1, Figure 2 and Figure 3, there are two the suction integrated frequency-selective surfaces structures thoroughly of absorption band for tool of the invention
By bending strip metal patch 1, Isola FR408 square medium substrates 2,0603 resistance value of model be 62 ohm Chip-R 3,
Air layer 4, F4B square medium substrates 5, square metal patch 6 and square ring metal patch 7 are formed.There are two inhale for the tool of the present invention
Integrated frequency-selective surfaces structure has consumption layer, the lossless layer of intermediate air layer and lower floor, and upper strata comprising upper strata thoroughly for the suction of receipts frequency band
There is consumption layer to be aligned with the symmetrical centre of lower floor lossless layer.
As shown in Fig. 2 (a), upper strata has in the cellular construction of consumption layer, and four bending strip metal patches 1 are close to the first kind
Square medium substrate 2, four identical Chip-Rs 3 are sequentially connected bending strip metal patch 1, bending strip metal patch 1
Between the spacing c that is stayed successively need to ensure the welding of Chip-R 3, four 1 symmetrical centers of bending strip metal patch with
The center alignment of square medium substrate 2.In addition to considering that model size is suitable for c, resistance value should also select for the selection of Chip-R 3
So that the impedance of FSR and free space impedance matching degree are best when inhaling wave.The effect length of bending strip metal patch 1 has consumption
The resonance band of FSS, if the l1 increases in simulation results show Fig. 2 (a), the resonance band for having consumption FSS can accordingly move to left；
When being bent the width w increases of strip metal patch 1, the equivalent inductance for having consumption FSS accordingly reduces, therefore resonance band can generate the right side
It moves, is found by emulating, wave transparent peak value can also continuously decrease.As shown in Fig. 2 (b), upper strata have consumption FSS and the lossless FSS of lower floor it
Between be with certain thickness air layer 4, it acts as make FSR that upper strata be avoided to have consumption FSS and the lossless FSS couplings of lower floor when inhaling wave
It closes, while is preferably matched with free space impedance, therefore the thickness h 2 of air layer 4 the most suitable should be selected.
As shown in figure 3, the lossless layer of lower floor is pasted by square metal patch 6, Second Type square medium substrate 5, square ring metal
Piece 7, Second Type square medium substrate 5 and square metal patch 6 fit closely composition successively.Square ring metal patch 7 is by one
The length of side square patch identical with the element length of dielectric-slab cuts off the smaller rectangular patch of the length of side that another center coincides with
Center of the center of piece composition, square metal patch 6 and square ring metal patch 7 with square medium substrate 5 is aligned.Square metal
The length of side s of patch 6 is bigger, and equivalent capacity is bigger, and the resonance band of the lossless FSS of lower floor is moved toward low frequency.Square ring metal patch 7
Ring width w increases, and equivalent inductance reduces, equivalent capacity increase, therefore resonant bandwidth narrows, and is found by emulation, resonance band
The right frequency point is barely affected, and left side frequency point moves right.The thickness h of square medium substrate 5 largely affects down
The bandwidth of the lossless FSS of layer, h is bigger, and bandwidth is narrower.
It is noted that n*n (n is for positive integer and more than or equal to 3) a list is typically chosen during frequency-selective surfaces actual processing
Member composition complete structure is to embody its cyclophysis, and as (n*a) millimeter * (n*a) millimeter, wherein a are frequency-selective surfaces
Element length.
In the present embodiment, completed by the auxiliary of business software CST STUDIO SUITE 2016 to frequency-selective surfaces
Design parameter optimizes and wave transparent/microwave absorbing property fine tuning, final parameter such as the following table 1.
Table 1
Designed suction integrated frequency-selective surfaces finished product thoroughly is produced using copper-clad laminate technology；Wherein, frequency is selected
The processing exemplar for selecting surface includes at least 3*3 unit a period of time, the splendid metal of metal patch layer choosing electric conductivity, best material
Expect for silver-colored (resistivity be 15.86 ρ/n Ω m), generally to select copper (resistivity is 16.78 ρ/n Ω m) that there can be preferable effect
Fruit, patch thickness control have no significant effect structure electrical property in 35um-70um, and the pattern form of patch uses printing electricity
The etching of road plate national regulation (QJ3103-99) standard technology is made.Air layer can select the rigid foam plate branch of respective thickness
Support has consumption FSS and the fixation of the lossless FSS positions of lower floor for upper strata.
Finally be used as it will be appreciated by those skilled in the art that, the selection of medium substrate material is nonessential to use Isola
FR408 and F4B, as long as relative dielectric constant and thickness meet resonance requirement.It will according to required frequency range, bandwidth etc.
It asks, the corresponding size parameter of FSR units can be adjusted, meet resonance requirement.According to required wave transmission rate, inhale wave rate etc.
It is required that the parameters such as the resistance value of Chip-R can be adjusted, meet resonance requirement.
As shown in figure 4, it is that the present invention inhales reflectivity curve under the conditions of vertical incidence of integrated frequency-selective surfaces thoroughly, transmission
Curve and absorption curve figure, it can be seen that the FSR structures are satisfied by the band logical of the following Insertion Loss of -3dB between 4.54-6.36GHz
Characteristic,-three dB bandwidth are 1.82GHz, wherein, Insertion Loss is only -0.71dB at 5.86GHz；In 2.65-2.95GHz, 7.58-
7.94GHz range interior suction wave rates more than 90%, wherein, wave rate is inhaled at 2.78GHz and inhales wave rate height for 96%, 7.75GHz places
Up to 98%.
As shown in figure 5, be the present invention inhale reflectivity curve under the conditions of the incidence of 0-30 degree of integrated frequency-selective surfaces thoroughly,
Transmission curve figure, wherein, (a) is TE patterns, and (b) is TM patterns.
As shown in fig. 6, it is that the present invention inhales absorption curve figure of the integrated frequency-selective surfaces under the conditions of 0-30 degree incidences thoroughly.
As it can be seen that the suction thoroughly integrated frequency-selective surfaces not only polarize it is insensitive, and with preferable angle stability, work within 30 degree
It is highly stable to make center bin.
Claims (6)
1. a kind of inhale integrated frequency-selective surfaces structure thoroughly, it is characterised in that：There are consumption layer, intermediate air layer and lower floor comprising upper strata
Lossless layer；
Wherein, the upper strata has consumption layer to include four the bending strip metal patches (1) being centrosymmetric, four Chip-Rs
(3) and one piece of first kind square medium substrate (2)；Each metal patch is considered as a straight strip metal patch warp
It crosses and is repeatedly formed by bending, two neighboring bending strip metal patch is connected by a Chip-R, and four Chip-Rs are complete
Identical, four symmetrical centers of bending strip metal patch are aligned with the center of square medium substrate；
The lossless layer of lower floor includes two pieces of identical square metal patches (6), the rectangular medium base of two pieces of identical Second Types
Plate (5) and one piece of square ring metal patch (7) are formed, according to square metal patch, medium substrate, square ring metal patch, medium base
Plate, square metal patch sequence be arranged in order；Square ring metal patch is identical with the element length of medium substrate by a length of side
Square patch cut off the smaller square patch of the length of side that another center coincides with and form, square metal patch and square ring gold
The center for belonging to patch is aligned with the center of medium substrate；
It is to have certain thickness air layer (4) that, which there is the centre of consumption layer and the lossless layer of lower floor on the upper strata, and upper strata have consumption layer and
The symmetrical centre alignment of the lossless layer of lower floor.
2. according to claim 1 inhale integrated frequency-selective surfaces structure thoroughly, it is characterised in that：The first kind is rectangular
The material of medium substrate is Isola FR408.
3. according to claim 1 inhale integrated frequency-selective surfaces structure thoroughly, it is characterised in that：The Second Type is rectangular
The material of medium substrate is F4BM220.
4. according to claim 1 inhale integrated frequency-selective surfaces structure thoroughly, it is characterised in that：The intermediate air layer
Thickness is 5mm.
5. according to claim 1 inhale integrated frequency-selective surfaces structure thoroughly, it is characterised in that：The square metal patch
The length of side be 9.8mm.
6. according to claim 1 inhale integrated frequency-selective surfaces structure thoroughly, it is characterised in that：The type of the Chip-R
Number for 0603, resistance value is 62 ohm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810178556.8A CN108270085B (en) | 2018-03-05 | 2018-03-05 | Suction-through integrated frequency selective surface structure |
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|---|---|---|---|
| CN201810178556.8A CN108270085B (en) | 2018-03-05 | 2018-03-05 | Suction-through integrated frequency selective surface structure |
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| CN108270085A true CN108270085A (en) | 2018-07-10 |
| CN108270085B CN108270085B (en) | 2023-12-01 |
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| CN109390692A (en) * | 2018-11-28 | 2019-02-26 | 航天科工武汉磁电有限责任公司 | A kind of single-pass band bilateral absorbing meta-material antenna house and its application, aircraft |
| CN109524789A (en) * | 2018-09-28 | 2019-03-26 | 西安电子科技大学 | A kind of modified FSS structure applied to S-band |
| CN110048240A (en) * | 2019-04-23 | 2019-07-23 | 电子科技大学 | A kind of high stop band degree of suppression low radar scattering cross section product transmissive arrays antenna |
| CN110247196A (en) * | 2019-06-20 | 2019-09-17 | 南京航空航天大学 | The frequency that a kind of intermediate frequency broadband wave transparent, high and low frequency inhale wave selects wave-absorber |
| CN110265780A (en) * | 2019-06-20 | 2019-09-20 | 南京航空航天大学 | A kind of Stealthy reflector Antenna cover of intermediate frequency broadband wave transparent, high and low frequency polarization conversion |
| WO2020019675A1 (en) * | 2018-07-27 | 2020-01-30 | 深圳光启尖端技术有限责任公司 | Wave absorption and transmission integrated device, and radome |
| CN111224242A (en) * | 2020-01-12 | 2020-06-02 | 中国人民解放军国防科技大学 | Wave-absorbing and wave-transmitting integrated frequency selective surface with anisotropic wave-transmitting band |
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| CN113314850A (en) * | 2021-05-08 | 2021-08-27 | 南京邮电大学 | 2.5D multilayer frequency selective surface |
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