CN208093763U - Inhale integrated frequency-selective surfaces structure thoroughly - Google Patents
Inhale integrated frequency-selective surfaces structure thoroughly Download PDFInfo
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- CN208093763U CN208093763U CN201820299845.9U CN201820299845U CN208093763U CN 208093763 U CN208093763 U CN 208093763U CN 201820299845 U CN201820299845 U CN 201820299845U CN 208093763 U CN208093763 U CN 208093763U
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- 238000005452 bending Methods 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims description 7
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims 1
- 239000010931 gold Substances 0.000 claims 1
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- 238000009738 saturating Methods 0.000 abstract description 2
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
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Abstract
Integrated frequency-selective surfaces structure thoroughly is inhaled the utility model 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 utility model has the frequency-selective surfaces structure for inhaling a saturating bulk properties; while ensureing wide band filter with low insertion loss wave transparent in C-band; so that wave transparent frequency band all has 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；When 0-30 is spent, electromagnetic transmission characteristic keeps stablizing incident angle simultaneously.
Description
Technical field
The utility model belongs to Electromagnetic Field and Microwave Technology field more particularly to a kind of suction integrated frequency-selective surfaces knot thoroughly
Structure.
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
It is by a large amount of periodic arrangements, with specific shape that rate, which selects surface (Frequency Selective Surface, FSS),
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), and 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, antenna may be implemented in the mixing radome technology based on FSS
System frequency domain it is stealthy.Band logical FSS is added in antenna house can be made the frequency-selecting wave transparent antenna with interior wave transparent, with outer total reflection
Cover, can make antenna system show different RCS characteristics inside and outside wave transparent frequency band.It is determined by antenna rather than antenna house with interior RCS
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
It is codetermined with 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 prodigious 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, the 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 all having microwave absorbing property up and down for wave transparent frequency band are considerably less.This is because FSR
If to there is the characteristic for inhaling wave frequency band up and down with wave transparent frequency band, 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 prodigious difficulty.Since frequency-selective surfaces are substantially a kind of filters in space, it is
It is capable of providing better Out-of-band rejection characteristic, and should have passband both ends can inhale the performance of 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.
Utility model content
Goal of the invention：In view of the above problems, inhaling integrated frequency-selective surfaces structure thoroughly, frequency the utility model proposes a kind of
The wave transparent frequency band on selection surface has up and down inhales wave frequency section.
Technical solution：To realize above-mentioned purpose of design, technical solution is used by the utility model：It is a kind of to inhale one thoroughly
Frequency-selective surfaces structure, including there are consumption layer, the lossless layer of intermediate air layer and lower layer in upper layer；
Wherein, it includes four the bending strip metal patches being centrosymmetric, four Chip-Rs that, which there is consumption layer on the upper layer,
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
A bending symmetrical center of strip metal patch is aligned with the center of square medium substrate；
The lossless layer of lower layer includes two pieces of identical square metal patches, two pieces of identical rectangular medium bases of Second Type
The square ring metal patch of plate and one piece is constituted, 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 constitutes, square metal patch and square ring metal patch
Center is aligned with the center of medium substrate；
The upper layer have the centre of consumption layer and the lossless layer of lower layer be there is certain thickness air layer, and upper layer have consumption layer and
The symmetrical centre of the lossless layer of lower layer is aligned.
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 utility model has the frequency-selective surfaces structure for inhaling a saturating bulk properties, is ensureing in C-band
While wide band filter with low insertion loss wave transparent so that wave transparent frequency band all has up and down inhales wave frequency band, and width is realized with minimum size
The electromagnetic transmission of frequency band controls, and is very suitable for being combined with structures such as covering, shell, the protective covers of most thickness,
Play 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 utility model inhales integrated frequency-selective surfaces structure thoroughly；
Fig. 2 is the overall diagram that the utility model inhales integrated frequency-selective surfaces structure thoroughly, and (a) is front view, is (b) side view
Figure；
Fig. 3 is the cellular construction figure that the utility model inhales the lossless layer of lower layer of integrated frequency-selective surfaces structure thoroughly, and (a) is
Whole broken away view is (b) square patch schematic diagram, is (c) square ring patch schematic diagram；
Fig. 4 is that the utility model inhales reflectivity curve, transmission song of the integrated frequency-selective surfaces under the conditions of vertical incidence thoroughly
Line and absorption curve figure；
Fig. 5 is that the utility model is inhaled reflectivity curve under the conditions of certain angle incidence of integrated frequency-selective surfaces thoroughly, passed
Defeated curve graph, (a) are TE patterns, are (b) TM patterns；
Fig. 6 is that the utility model inhales absorption curve figure of integrated frequency-selective surfaces under the conditions of certain angle incidence thoroughly.
Specific implementation mode
The technical solution of the utility model 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 of absorption band integrated frequency-selective surfaces thoroughly for the tool of the utility model
Structure is by bending strip metal patch 1, Isola FR408 square medium substrates 2, the patch electricity that 0603 resistance value of model is 62 ohm
Resistance 3, air layer 4, F4B square medium substrates 5, square metal patch 6 and square ring metal patch 7 are constituted.The present invention's has two
Integrated frequency-selective surfaces structure has consumption layer, the lossless layer of intermediate air layer and lower layer comprising upper layer thoroughly for the suction of a absorption band, and
Upper layer has consumption layer to be aligned with the symmetrical centre of lower layer lossless layer.
As shown in Fig. 2 (a), upper layer 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 of square medium substrate 2 is aligned.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 has the resonance band of consumption FSS that can accordingly move to left if the l1 in simulation results show Fig. 2 (a) increases；
When being bent the width w increases of strip metal patch 1, there is the equivalent inductance of consumption FSS accordingly to reduce, therefore resonance band will produce the right side
It moves, is found by emulating, wave transparent peak value can also continuously decrease.As shown in Fig. 2 (b), upper layer have consumption FSS and the lossless FSS of lower layer it
Between for certain thickness air layer 4, it acts as make FSR that upper layer be avoided to have consumption FSS and the lossless FSS couplings of lower layer when inhaling wave
It closes, while preferably being matched with free space impedance, therefore the thickness h 2 of air layer the most suitable 4 should be selected.
As shown in figure 3, the lossless layer of lower layer 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
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
Piece is constituted, and the center of square metal patch 6 and square ring metal patch 7 is aligned with the center of square medium substrate 5.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 layer is moved toward low frequency.Square ring metal patch 7
Ring width w increases, and equivalent inductance reduces, and equivalent capacity increases, 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 being typically chosen n*n (n is positive integer and is more than or equal to 3) a list when 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 to frequency-selective surfaces by the auxiliary of business software CST STUDIO SUITE 2016
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
Material is silver (resistivity is 15.86 ρ/n Ω m), generally selects copper (resistivity is 16.78 ρ/n Ω m) that can have 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 the fixation of consumption FSS and the lossless positions FSS of lower layer for upper layer.
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 is wanted 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, suction 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, be the utility model inhale 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 following Insertion Loss of -3dB between 4.54-6.36GHz
Bandpass characteristics,-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 are 90% or more, wherein it is that wave rate height is inhaled at 96%, 7.75GHz that wave rate is inhaled at 2.78GHz
Up to 98%.
As shown in figure 5, being that the utility model inhales reflection of the integrated frequency-selective surfaces under the conditions of incidence of 0-30 degree thoroughly
Curve, transmission curve figure, wherein (a) is TE patterns, is (b) TM patterns.
As shown in fig. 6, being that the utility model inhales absorption song of integrated frequency-selective surfaces under the conditions of 0-30 degree incidences thoroughly
Line chart.As it can be seen that the suction thoroughly integrated frequency-selective surfaces not only polarize it is insensitive, and with preferable angle stabilization within 30 degree
Property, work centre frequency range is highly stable.
Claims (6)
1. a kind of inhaling integrated frequency-selective surfaces structure thoroughly, it is characterised in that：Including there are consumption layer, intermediate air layer and lower layer in upper layer
Lossless layer；
Wherein, it includes four the bending strip metal patches (1) being centrosymmetric, four Chip-Rs that, which there is consumption layer on the upper layer,
(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 layer includes two pieces of identical square metal patches (6), two pieces of identical rectangular medium bases of Second Type
Plate (5) and one piece of square ring metal patch (7) are constituted, 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 as 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 constitute, square metal patch and square ring gold
The center for belonging to patch is aligned with the center of medium substrate；
The upper layer have the centre of consumption layer and the lossless layer of lower layer be there is certain thickness air layer (4), and upper layer have consumption layer and
The symmetrical centre of the lossless layer of lower layer is aligned.
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 be 0603, resistance value be 62 ohm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820299845.9U CN208093763U (en) | 2018-03-05 | 2018-03-05 | Inhale integrated frequency-selective surfaces structure thoroughly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820299845.9U CN208093763U (en) | 2018-03-05 | 2018-03-05 | Inhale integrated frequency-selective surfaces structure thoroughly |
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| Publication Number | Publication Date |
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| CN208093763U true CN208093763U (en) | 2018-11-13 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108270085A (en) * | 2018-03-05 | 2018-07-10 | 南京航空航天大学 | Inhale integrated frequency-selective surfaces structure thoroughly |
| CN110650603A (en) * | 2019-09-10 | 2020-01-03 | Oppo广东移动通信有限公司 | Housing assembly and electronic device |
| CN111987439A (en) * | 2020-07-27 | 2020-11-24 | 南京航空航天大学 | Miniaturized passive flexible band-pass frequency selection surface for antenna housing |
| CN113314850A (en) * | 2021-05-08 | 2021-08-27 | 南京邮电大学 | 2.5D multilayer frequency selective surface |
| CN114361806A (en) * | 2022-01-11 | 2022-04-15 | 西安电子科技大学 | Miniaturized suction-penetration integrated frequency selective surface |
-
2018
- 2018-03-05 CN CN201820299845.9U patent/CN208093763U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108270085A (en) * | 2018-03-05 | 2018-07-10 | 南京航空航天大学 | Inhale integrated frequency-selective surfaces structure thoroughly |
| CN108270085B (en) * | 2018-03-05 | 2023-12-01 | 南京航空航天大学 | Suction-through integrated frequency selective surface structure |
| CN110650603A (en) * | 2019-09-10 | 2020-01-03 | Oppo广东移动通信有限公司 | Housing assembly and electronic device |
| CN110650603B (en) * | 2019-09-10 | 2021-06-08 | Oppo广东移动通信有限公司 | Housing assembly and electronic device |
| CN111987439A (en) * | 2020-07-27 | 2020-11-24 | 南京航空航天大学 | Miniaturized passive flexible band-pass frequency selection surface for antenna housing |
| CN111987439B (en) * | 2020-07-27 | 2022-05-24 | 南京航空航天大学 | Miniaturized passive flexible band-pass frequency selection surface for antenna housing |
| CN113314850A (en) * | 2021-05-08 | 2021-08-27 | 南京邮电大学 | 2.5D multilayer frequency selective surface |
| CN114361806A (en) * | 2022-01-11 | 2022-04-15 | 西安电子科技大学 | Miniaturized suction-penetration integrated frequency selective surface |
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