CN209999786U - kinds of flexible frequency selective surface - Google Patents
kinds of flexible frequency selective surface Download PDFInfo
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- CN209999786U CN209999786U CN201920522351.7U CN201920522351U CN209999786U CN 209999786 U CN209999786 U CN 209999786U CN 201920522351 U CN201920522351 U CN 201920522351U CN 209999786 U CN209999786 U CN 209999786U
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Abstract
The utility model provides an kinds of flexible frequency selective surface, including the glue film, the lower surface covering of glue film has the base film layer, and the glue film internal curing has the frequency selection layer, and the upper surface covering of glue film has the lid film layer, the frequency selection layer is used for forming electromagnetic protection or RCS reduction to equipment, and base film layer and glue film are used for protecting the frequency selection layer and avoid receiving the damage and insulating, and the lid film layer is used for protecting this flexible frequency selective surface whole and avoids receiving the damage.
Description
Technical Field
The utility model relates to an kinds of flexible frequency selective surface belongs to electromagnetic compatibility technical field, can be used to the electromagnetic protection of various curved surface structures.
Background
The frequency selective surface is used as functional electromagnetic protection materials, is widely applied to the improvement of stealth capacity of airplanes, radars and the like by , and has the characteristic of obviously reducing RCS (radar cross section).
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides an kinds of flexible frequency selective surface, this flexible frequency selective surface reliability is high, simple manufacture, the nature of buckling is good, install easily, is applicable to the surface mounting of curved surface structure, can realize the RCS of object reduction and the outband interference suppression of antenna.
The utility model discloses a following technical scheme can realize.
The utility model provides a kinds of flexible frequency selective surface, including the glue film, the lower surface covering of glue film has the base film layer, and the solidification has the frequency selection layer in the glue film, and the upper surface covering of glue film has the lid rete, the frequency selection layer is used for forming electromagnetic protection or RCS reduction to equipment, and base film layer and glue film layer are used for protecting the frequency selection layer and avoid receiving the damage and insulating, and the lid rete is used for protecting this flexible frequency selective surface whole and avoids receiving the damage.
The frequency selection layer is a flexible copper foil with a two-dimensional periodic structure.
The two-dimensional periodic structure is prepared by an etching method.
The base film layer and the cover film layer are both made of polyimide or polyester films.
The base film layer is solidified on the lower surface of the adhesive layer through hot pressing, and the cover film layer is solidified on the upper surface of the adhesive layer through hot pressing.
And a plurality of patches or apertures with the same shape are uniformly distributed on the frequency selection layer.
The beneficial effects of the utility model reside in that: the bendable flexible frequency selection surface is made of flexible materials, and can be cut correspondingly according to size requirements; the conformal fitting of each curved surface structure can be realized, and the installation is simple and easy to operate; the manufacturing cost of the frequency selection surface of the curved surface structure can be effectively reduced; compared with the traditional frequency selection surface with a curved surface structure, the practical use performance of the flexible frequency selection surface is closer to the design index.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic structural diagram of the frequency selective layer of the present invention;
FIG. 3 is a flow chart of the present invention;
in the figure: 1-base film layer, 2-adhesive layer, 3-frequency selection layer and 4-cover film layer.
Detailed Description
The following illustrates the present invention, but the scope of the invention is not limited thereto.
As shown in fig. 1 and 2, flexible frequency selection surfaces comprise an adhesive layer 2, wherein a base film layer 1 covers the lower surface of the adhesive layer 2, a frequency selection layer 3 is cured in the adhesive layer 2, a cover film layer 4 covers the upper surface of the adhesive layer 2, the frequency selection layer 3 is used for forming electromagnetic protection or RCS reduction on equipment, the base film layer 1 and the adhesive layer 2 are used for protecting the frequency selection layer 3 from being damaged and insulated, and the cover film layer 4 is used for protecting the whole flexible frequency selection surface from being damaged.
The frequency selection layer 3 is a flexible copper foil with a two-dimensional periodic structure, and can reflect or conduct electromagnetic waves in a specific frequency band, so that the electromagnetic waves in a required frequency band are received, and the electromagnetic waves in a suppressed frequency band are attenuated.
, the two-dimensional periodic structure is made of flexible copper foil, can be processed by the mature etching technology at present in a plane state, has good flexibility after being cured by the adhesive layer 2 and hot-pressed and cured by the base film layer 1 and the cover film layer 4, can be directly and conformally covered on curved surface equipment after being bent, does not need to be cut, sliced and pasted after being approximately unfolded, and does not need to consume long time for mechanical fine processing by a complex robot.
The two-dimensional periodic structure is prepared by an etching method, so that the formed two-dimensional periodic structure is guaranteed to have good performance.
The base film layer 1 and the cover film layer 4 are both made of polyimide or polyester films.
The base film layer 1 is solidified on the lower surface of the glue layer 2 through hot pressing, and the cover film layer 4 is solidified on the upper surface of the glue layer 2 through hot pressing.
And a plurality of patches or apertures with the same shape are uniformly distributed on the frequency selection layer 3 and are used for meeting the performance index requirements.
Specifically, patches or slits with actual uniformly distributed and periodic structural characteristics need to be designed according to the required performance index requirements, the shapes of the patches or the slits may be cross-shaped, hexagonal, circular, square and the like, and the slits are not limited to through holes and may be patches, slits and the like.
The preparation method of the utility model is shown in figure 3 and comprises the following steps:
s1, pretreatment: cleaning stains and oxides on the surface of the frequency selection layer 3;
s2, pasting a base film layer: the frequency selection layer 3 is glued on the base film layer 1 through the glue layer 2;
s3, etching the frequency selective layer: the frequency selective layer 3 is made into a two-dimensional periodic structure by etching;
s4, surface treatment: carrying out anti-oxidation treatment on the surface of the frequency selection layer 3;
s5, covering a film layer: the cover film layer 4 is glued on the frequency selection layer 3 through the glue layer 2;
s6, hot pressing: integrally hot-pressing the flexible frequency selective surface for shaping;
s7, curing: and integrally curing the flexible frequency selective surface after hot pressing, and performing qualitative determination.
Example 1
As described above, taking a certain missile as an example, illustrates the implementation of the flexible frequency selective surface for out-of-band interference resistance of the missile-mounted antenna according to the present invention as follows:
designing a two-dimensional periodic structure of a frequency selection layer 3 and thicknesses of a base film layer 1, an adhesive layer 2, the frequency selection layer 3 and a cover film layer 4 according to requirements of out-of-band interference resistance of the pop-up antenna, preprocessing S1 on the frequency selection layer 3, cleaning stains and oxides on the surface of the frequency selection layer 3, gluing the frequency selection layer 3 on the base film layer 1 through the adhesive layer 2 by attaching a base film S2, etching S3 on the frequency selection layer 3 to obtain a designed two-dimensional periodic structure, processing S4 on the surface of the frequency selection layer 3 to improve the oxidation resistance of the frequency selection layer 3, gluing the cover film layer 4 on the frequency selection layer 3 through the adhesive layer 2 by attaching the cover film S5, shaping and qualifying a manufactured flexible frequency selection surface by hot pressing S6 and curing S7, cutting the manufactured flexible frequency selection surface according to the size of the area of the pop-up antenna to be protected, and attaching or fixing the manufactured flexible frequency selection surface to the surface of the pop-up antenna, and the out-of-band interference resistance of the pop-up antenna is realized.
Example 2
As described above, for a certain device surface requiring RCS reduction, according to the RCS reduction requirement of the device, the two-dimensional periodic structure of the frequency-selective layer 3 and the thicknesses of the base film layer 1, the adhesive layer 2, the frequency-selective layer 3 and the cover film layer 4 are designed, the frequency-selective layer 3 is pretreated S1, the stains and oxides on the surface of the frequency-selective layer 3 are cleaned, the frequency-selective layer 3 is glued on the base film layer 1 through the adhesive layer 2 by attaching the base film S2, the frequency-selective layer 3 is etched S3 by the frequency-selective layer etching to obtain the designed two-dimensional periodic structure on the frequency-selective layer 3, the oxidation resistance of the frequency-selective layer 3 is improved by performing surface treatment S4 on the frequency-selective layer 3, the cover film layer 4 is glued on the frequency-selective layer 3 through the adhesive layer 2 by attaching the cover film S5, the manufactured flexible frequency selection surface is shaped and qualified by hot pressing S6 and curing S7, and then the manufactured flexible frequency selection surface is cut into the corresponding size and shape according to the size of the device surface, and sticking the cut flexible frequency selection surface on the surface of the equipment in a sticking way to realize the RCS reduction of the equipment.
Claims (6)
- The flexible frequency selective surfaces comprise an adhesive layer (2) and are characterized in that a base film layer (1) covers the lower surface of the adhesive layer (2), a frequency selective layer (3) is solidified in the adhesive layer (2), a cover film layer (4) covers the upper surface of the adhesive layer (2), the frequency selective layer (3) is used for forming electromagnetic protection or RCS reduction on equipment, the base film layer (1) and the adhesive layer (2) are used for protecting the frequency selective layer (3) from being damaged and insulated, and the cover film layer (4) is used for protecting the flexible frequency selective surface from being damaged integrally.
- 2. A flexible frequency selective surface according to claim 1, wherein: the frequency selection layer (3) is a flexible copper foil with a two-dimensional periodic structure.
- 3. A flexible frequency selective surface according to claim 2, wherein: the two-dimensional periodic structure is prepared by an etching method.
- 4. A flexible frequency selective surface according to claim 1, wherein: the base film layer (1) and the cover film layer (4) are both made of polyimide or polyester films.
- 5. A flexible frequency selective surface according to claim 1, wherein: the base film layer (1) is solidified on the lower surface of the glue layer (2) through hot pressing, and the cover film layer (4) is solidified on the upper surface of the glue layer (2) through hot pressing.
- 6. A flexible frequency selective surface according to claim 1, wherein: a plurality of patches or apertures with the same shape are uniformly distributed on the frequency selection layer (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920522351.7U CN209999786U (en) | 2019-04-17 | 2019-04-17 | kinds of flexible frequency selective surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920522351.7U CN209999786U (en) | 2019-04-17 | 2019-04-17 | kinds of flexible frequency selective surface |
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| Publication Number | Publication Date |
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| CN209999786U true CN209999786U (en) | 2020-01-31 |
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| CN201920522351.7U Active CN209999786U (en) | 2019-04-17 | 2019-04-17 | kinds of flexible frequency selective surface |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110053315A (en) * | 2019-04-17 | 2019-07-26 | 江南机电设计研究所 | A kind of flexibility frequency-selective surfaces and preparation method |
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2019
- 2019-04-17 CN CN201920522351.7U patent/CN209999786U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110053315A (en) * | 2019-04-17 | 2019-07-26 | 江南机电设计研究所 | A kind of flexibility frequency-selective surfaces and preparation method |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20221221 Address after: 550009 No.7 Honghe Road, economic and Technological Development Zone, Guiyang City, Guizhou Province Patentee after: Aerospace Jiangnan Group Co.,Ltd. Patentee after: JIANGNAN ELECTROMECHANICAL DESIGN Research Institute Address before: 550009 Guizhou Aerospace Industrial Park, No.7 Honghe Road, Xiaohe District, Guiyang City, Guizhou Province Patentee before: JIANGNAN ELECTROMECHANICAL DESIGN Research Institute |
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| TR01 | Transfer of patent right |