CN1599551A - Circuit analog wave absorbing material using active carbon felt as absorbent and its preparation method - Google Patents
Circuit analog wave absorbing material using active carbon felt as absorbent and its preparation method Download PDFInfo
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- CN1599551A CN1599551A CN 200410020383 CN200410020383A CN1599551A CN 1599551 A CN1599551 A CN 1599551A CN 200410020383 CN200410020383 CN 200410020383 CN 200410020383 A CN200410020383 A CN 200410020383A CN 1599551 A CN1599551 A CN 1599551A
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Abstract
This invention discloses a circuit analog wave absorption material with activated carbon felt and its preparation method taking glass fiber cloth and epoxy resin as the electromagnetic matched layer, Al foil as the reflection layer, different shapes of unit periodic structures of activated carbon felts are adhered with the epoxy resin between the two layers. The method includes the following steps: matching epoxy resin and polyamide to adhesives, spreading an Al foil layer and s-glass fiber cloth layer at the bottom of a mold then to pour the adhesives to it, after that, the activated carbon felt unit periodic structure is put on it then to pour in adhesives fully moisturing it, again to spread the cloth to be fully moistured, to spread stripping paper and close the mold to be solidized to finish the product.
Description
Technical field
The present invention relates to a kind of is the circuit analog absorbing material and preparation method thereof of absorbent with the activated carbon felt, belongs to the circuit analog absorbing material technology.
Background technology
Circuit analog absorbing material claims frequency-selective surfaces (Frequency Selective Surface) again, is that thin metal gate or the thin metal patch with periodic arrangement is added in the absorbent structure, changes the reflection characteristic of material.The shape of thin metal gate or thin metal patch mainly can be divided into following several: that (1) center connects or N is son extremely, and is extremely sub, cross etc. as dipole, three; (2) annular is as annulus, straight-flanked ring and hexagon ring etc.; (3) difform paster; (4) combination of above-mentioned figure.The operation principle of frequency-selective surfaces is when the incident wave frequency is on the resonance frequency of paster or aperture unit, and FSS just shows reflection and transmission characteristic.Frequency-selective surfaces is widely used in scientific research and commercial field.Be used on the microwave oven, the open-porous metal screen reflects the microwave energy of 2.45GHz fully, and allows light transmission (can see through the food that microwave oven is seen the inside); Can be used as filter, metalloradar cover, duplexer etc. in the GHz scope; Can be used as polarizer, spectroscope, laser output coupler, antenna multicoupler, laser mirror, Fabry-Perot interferometer and filter etc. in the THz scope.Be used for the stealth technology field as for FSS, there is the foreign scholar to do research, as Yanan Sha, people such as K.A.Jose have been prepared into FSS in the carbon fiber synthetic, test for different preparation samples, and compare, find that some sample that has loaded FSS has special reflection characteristic with the sample that does not load FSS, its reflection frequency range has been transferred to other frequency ranges, makes transmitting power obtain effective decay.
Summary of the invention
The object of the present invention is to provide a kind of is the circuit analog absorbing material and preparation method thereof of absorbent with the activated carbon felt.This circuit analog absorbing material absorbing property is good, and the preparation method is simple.
The present invention is realized by following technical proposals.With glass fabric and epoxy resin is the electromagnetism matching layer, is the reflector with the aluminium foil, simulates absorbing material by the gluing suction ripple of epoxy resin layer forming circuit between two-layer, it is characterized in that inhaling the difformity cell cube periodic structure that the ripple layer is an activated carbon felt.
Above-mentioned activated carbon felt shape unit body be rectangle, etc. " ten " font, square, equilateral triangle, ring square or labyrinth square.
The preparation method of above-mentioned circuit analog absorbing material is characterized in that comprising following process:
At 60～80 ℃ E-44 (6101) type epoxy resin and 203# Versamid mixed by mass ratio that to be mixed with bonding agent standby in 1: 1～2: 1, at mold bottom tiling one deck aluminium foil and one deck S-glass fabric, pour into the part bonding agent, make its complete sized glass fibres cloth, then, place activated carbon felt cell cube periodic structure thereon, pour into bonding agent again, treat to soak into fully activated carbon felt cell cube periodic structure, repave layer of glass cloth thereon, it is soaked into by bonding agent fully.At last, spread processing release paper and the patrix that closes, precuring 20min then, at 60～80 ℃ of temperature and pressure 10～15MPa, solidifies 2～3h.Make with the activated carbon felt is the circuit analog absorbing material of absorbent.
The invention has the advantages that: raw material are inexpensive, the preparation method is simple; The absorbing property of obtained circuit analog absorbing material is good, and this absorbing material is more than 8～18GHz frequency range effective attenuation electromagnetic wave-10dB, and maximum absorption band can reach-30dB.
Description of drawings
Fig. 1 is one of embodiment of the invention, and rectangular element periodic structure activated carbon felt is inhaled ripple layer schematic diagram; Black part is divided into activated carbon-fiber felt, and white rectangular portion is divided into the rectangular opening of opening on the carbon felt;
Fig. 2 is two of the embodiment of the invention, waits " ten " font unit periodic structure activated carbon felt to inhale ripple layer schematic diagram; Among the figure, black part is divided into activated carbon-fiber felt, " ten " font hole of white portion for opening on the carbon felt;
Fig. 3 is three of the embodiment of the invention, and equilateral triangle unit periodic structure activated carbon felt is inhaled ripple layer schematic diagram; Black part is divided into activated carbon-fiber felt, white portion " equilateral triangle " hole for opening on the carbon felt;
Fig. 4 is that equilateral triangle unit periodic structure activated carbon felt is inhaled ripple layer schematic diagram, and black part is divided into the activated carbon-fiber felt paster of equilateral triangle.White portion is blank;
Fig. 5 is four of the embodiment of the invention, and square shaped cells periodic structure activated carbon felt is inhaled ripple layer schematic diagram; Black part is divided into activated carbon-fiber felt, white portion " square " hole for opening on the carbon felt;
Fig. 6 is four of the embodiment of the invention, and square shaped cells periodic structure activated carbon felt is inhaled ripple layer schematic diagram, and black part is divided into foursquare activated carbon-fiber felt paster;
Fig. 7 is five of the embodiment of the invention, and ring square shaped cells periodic structure activated carbon felt is inhaled ripple layer schematic diagram; Among the figure, black part is divided into activated carbon-fiber felt, the hole of white portion for opening on the carbon felt;
Fig. 8 is six of the embodiment of the invention, and labyrinth square shaped cells periodic structure activated carbon felt is inhaled ripple layer schematic diagram.Among the figure, black part is divided into the activated carbon felt rug.
Fig. 9 makes the reflection loss curve of absorbing material for example 1;
Figure 10 makes the reflection loss curve of absorbing material for example 2
Figure 11 makes the reflection loss curve of absorbing material for example 3
Figure 12 makes the reflection loss curve of absorbing material for example 3
Figure 13 makes the reflection loss curve of absorbing material for example 4
Figure 14 makes the reflection loss curve of absorbing material for example 4
Figure 15 makes the reflection loss curve of absorbing material for example 5
Figure 16 makes the reflection loss curve of absorbing material for example 6
Embodiment
Example 1. activated carbon felt rectangular element periodic structures
(1) fixed L=32mm, x=4mm, the value a.L/W=8 of change L/W, W=4mm; B.L/W=16/3, W=6mmc.L/W=4, W=8mm; D.L/W=2, W=16mm;
(2) select a certain L/W value, fixed L=32mm changes x value a.x=10mm; B.x=8mm; C.x=6mm;
(3) select a certain L/W value and x value, change L value a.L=24mm; B.L=18mm; C.L=12mm;
By changing the value of parameter L/W, L and x, can obtain wave-absorbing effect preferably, as shown in Figure 9, be exactly to work as L/W=2, L=24mm, during x=6mm, the reflection loss curve of activated carbon-fiber felt/epoxide resin material.
" ten " shape unit periodic structures such as example 2. activated carbon felts
(1) fixed L=32mm, c=4mm changes W value a.W=4mm; B.W=6mm; C.W=8mm; D.W=12mm;
(2) fixed L=32mm selects W=8mm, changes c value a.c=6mm; B.c=8mm; C=10mm;
(3) fixing W=8mm, c=6mm changes L value a.L=24mm; B.L=16mm; C.L=8mm;
By changing the value of parameter W, L and x, can obtain wave-absorbing effect preferably, as shown in figure 10, be exactly to work as W=8mm, L=16mm, during c=6mm, the reflection loss curve of activated carbon-fiber felt/epoxide resin material.
Example 3, activated carbon felt square shaped cells periodic structure
(1) fixing b=5mm changes the value a/b=3 of a/b; A/b=2; A/b=1.4;
(2) fixing a/b=3 changes the value b=7mm of b; B=5mm; B=3mm;
By changing the value of parameter a/b, b, can obtain wave-absorbing effect preferably.As Figure 11, shown in 12, be exactly to work as b=5mm, during a/b=1.4, the reflection loss curve of activated carbon-fiber felt/epoxide resin material.Wherein, Figure 11 is the reflection loss curve (corresponding to Fig. 5) of open cell type sample, and Figure 12 is the reflection loss curve (corresponding to Fig. 6) of patch-type sample.
Example 4, property charcoal felt equilateral triangle unit periodic structure
(1) fixing c=5mm changes the value a/c=2 of a/c; A/c=3; A/c=4;
(2) fixing a=15mm changes the value a/c=5 of a/c; A/c=3; A/c=15/7; A/c=3/2;
By changing the value of a/c, c, can obtain wave-absorbing effect preferably.As shown in figure 13, be exactly to work as a=15mm, during a/c=5, the reflection loss curve of open cell type activated carbon-fiber felt/epoxide resin material (corresponding to Fig. 3); As shown in figure 14, be exactly to work as a=10mm, during a/c=2, the reflection loss curve of patch-type activated carbon-fiber felt/epoxide resin material (corresponding to Fig. 4).
Example 5, active carbon felt ring (collar square shaped cells periodic structure
Fixing D
1=80mm, D
2=40mm, the value of change W, W=8mm; W=10mm; W=12mm; W=15mm; Figure 15 shows that when W gets different value the reflection of electromagnetic wave attenuation curve of material.
Example 6, activated carbon felt labyrinth square shaped cells periodic structure
Fixedly active carbon felt rug width is 5mm, and the gap is 5mm between the carbon felt rug.The reflection loss curve of material is seen Figure 16.
Claims (3)
1, a kind of is the circuit analog absorbing material of absorbent with the activated carbon felt, this material is the electromagnetism matching layer with glass fabric and epoxy resin, with the aluminium foil is the reflector, and between two-layer, constitute by the gluing suction ripple of epoxy resin layer, it is characterized in that: inhaling the ripple layer is the difformity cell cube periodic structure of activated carbon felt.
2, described by claim 1 is the circuit analog absorbing material of absorbent with the activated carbon felt, it is characterized in that: activated carbon felt shape unit body be rectangle, etc. " ten " font, square, equilateral triangle, ring square or labyrinth square.
3, a kind of is the preparation method of the circuit analog absorbing material of absorbent with the activated carbon felt, it is characterized in that comprising following process: E-44 type epoxy resin and 203# Versamid mixed by mass ratio that to be mixed with bonding agent standby in 1: 1～2: 1 at 60～80 ℃, at mold bottom tiling one deck aluminium foil and one deck S-glass fabric, pour into the part bonding agent, make its complete sized glass fibres cloth, then, place activated carbon felt cell cube periodic structure thereon, pour into bonding agent again, treat to soak into fully activated carbon felt cell cube periodic structure, repave layer of glass cloth thereon, it is soaked into by bonding agent fully, spread processing release paper at last and the patrix that closes, precuring 20min, at 60～80 ℃ of temperature and pressure 10～15MPa, solidify 2～3h then, making with the activated carbon felt is the circuit analog absorbing material of absorbent.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102026531A (en) * | 2010-12-22 | 2011-04-20 | 浙江大学 | Super-matching wave-absorbing material formed by utilizing sheeted cross-shaped metal unit structure |
| CN102316711A (en) * | 2011-06-22 | 2012-01-11 | 东华大学 | Wave-absorbing stealthy material with active carbon-fiber felt screen (ACFFS) structure and preparation method thereof |
| CN102354811A (en) * | 2011-08-15 | 2012-02-15 | 浙江大学 | Completely matched refraction-free radome formed by utilizing sub-wavelength resonance units |
| CN102732210A (en) * | 2012-06-28 | 2012-10-17 | 中国人民解放军国防科学技术大学 | Electromagnetic-wave absorption-material having periodic structure, and preparation method thereof |
| CN103013440A (en) * | 2012-12-17 | 2013-04-03 | 清华大学 | High dielectric ceramic particle and metal sheet composite wave-absorbing material and preparation method thereof |
| CN104610910A (en) * | 2015-01-15 | 2015-05-13 | 东华大学 | Wave absorption composite material containing chopped vertical bars and preparation method of wave absorption composite material |
| CN106058484A (en) * | 2016-07-08 | 2016-10-26 | 西安电子科技大学 | Broadband electromagnetic wave-absorbing material with multilayer structure |
| CN106341974A (en) * | 2015-07-10 | 2017-01-18 | 深圳光启尖端技术有限责任公司 | Wave-absorbing metamaterial and wave-absorbing device |
| CN106469857A (en) * | 2015-08-20 | 2017-03-01 | 深圳光启尖端技术有限责任公司 | Absorbing meta-material |
| CN107834194A (en) * | 2017-10-18 | 2018-03-23 | 西安天和防务技术股份有限公司 | Filter antenna cover |
| CN111362711A (en) * | 2020-03-10 | 2020-07-03 | 烟台大学 | Circuit simulation structure type ceramic wave-absorbing material and preparation method thereof |
| CN112312754A (en) * | 2020-09-29 | 2021-02-02 | 航天特种材料及工艺技术研究所 | Structural composite wave-absorbing material and preparation method thereof |
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2004
- 2004-08-30 CN CN 200410020383 patent/CN1599551A/en active Pending
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102026531A (en) * | 2010-12-22 | 2011-04-20 | 浙江大学 | Super-matching wave-absorbing material formed by utilizing sheeted cross-shaped metal unit structure |
| CN102026531B (en) * | 2010-12-22 | 2012-02-01 | 浙江大学 | Super-matching wave-absorbing material formed by utilizing sheeted cross-shaped metal unit structure |
| CN102316711A (en) * | 2011-06-22 | 2012-01-11 | 东华大学 | Wave-absorbing stealthy material with active carbon-fiber felt screen (ACFFS) structure and preparation method thereof |
| CN102316711B (en) * | 2011-06-22 | 2014-04-02 | 东华大学 | Wave-absorbing stealthy material with active carbon-fiber felt screen (ACFFS) structure and preparation method thereof |
| CN102354811A (en) * | 2011-08-15 | 2012-02-15 | 浙江大学 | Completely matched refraction-free radome formed by utilizing sub-wavelength resonance units |
| CN102732210A (en) * | 2012-06-28 | 2012-10-17 | 中国人民解放军国防科学技术大学 | Electromagnetic-wave absorption-material having periodic structure, and preparation method thereof |
| CN103013440A (en) * | 2012-12-17 | 2013-04-03 | 清华大学 | High dielectric ceramic particle and metal sheet composite wave-absorbing material and preparation method thereof |
| CN103013440B (en) * | 2012-12-17 | 2014-12-24 | 清华大学 | High dielectric ceramic particle and metal sheet composite wave-absorbing material and preparation method thereof |
| CN104610910A (en) * | 2015-01-15 | 2015-05-13 | 东华大学 | Wave absorption composite material containing chopped vertical bars and preparation method of wave absorption composite material |
| CN104610910B (en) * | 2015-01-15 | 2017-03-29 | 东华大学 | It is a kind of to absorb ripple composite and preparation method thereof containing the upright wand that is chopped |
| CN106341974A (en) * | 2015-07-10 | 2017-01-18 | 深圳光启尖端技术有限责任公司 | Wave-absorbing metamaterial and wave-absorbing device |
| CN106341974B (en) * | 2015-07-10 | 2019-10-15 | 深圳光启尖端技术有限责任公司 | A kind of absorbing meta-material and inhale wave apparatus |
| CN106469857A (en) * | 2015-08-20 | 2017-03-01 | 深圳光启尖端技术有限责任公司 | Absorbing meta-material |
| CN106469857B (en) * | 2015-08-20 | 2024-01-19 | 深圳光启尖端技术有限责任公司 | Wave-absorbing metamaterial |
| CN106058484A (en) * | 2016-07-08 | 2016-10-26 | 西安电子科技大学 | Broadband electromagnetic wave-absorbing material with multilayer structure |
| CN107834194A (en) * | 2017-10-18 | 2018-03-23 | 西安天和防务技术股份有限公司 | Filter antenna cover |
| CN107834194B (en) * | 2017-10-18 | 2023-10-10 | 西安天和防务技术股份有限公司 | Filtering antenna housing |
| CN111362711A (en) * | 2020-03-10 | 2020-07-03 | 烟台大学 | Circuit simulation structure type ceramic wave-absorbing material and preparation method thereof |
| CN112312754A (en) * | 2020-09-29 | 2021-02-02 | 航天特种材料及工艺技术研究所 | Structural composite wave-absorbing material and preparation method thereof |
| CN112312754B (en) * | 2020-09-29 | 2023-11-14 | 航天特种材料及工艺技术研究所 | Structural composite wave-absorbing material and preparation method thereof |
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