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Dual-frequency broadband wave-absorbing patch and preparation method thereof

A technology of wave-absorbing patches and patches, which is applied to electrical components, antennas, etc., can solve the problems of poor design flexibility of absorption frequency bands, narrow effective bandwidth of wave absorption, thick wave-absorbing materials, etc., and achieves a simple, fast, conformal preparation method Good performance and easy operation

Active Publication Date: 2019-03-08
AEROSPACE SCI & IND WUHAN MAGNETISM ELECTRON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The design scheme of the commonly used dual-frequency flexible absorbing materials has the following disadvantages: some absorbing materials are often thicker, and the design flexibility of the absorbing frequency band is poor; some absorbing effective bandwidth is too narrow (often less than 0.5GHz), Less applicability in engineering

Method used

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  • Dual-frequency broadband wave-absorbing patch and preparation method thereof
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  • Dual-frequency broadband wave-absorbing patch and preparation method thereof

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preparation example Construction

[0051] In addition, the present application also provides a method for preparing the above-mentioned dual-band broadband wave-absorbing patch 10, which may include the following steps, for example:

[0052] Prepare the wave-transparent layer patch 11: mix the raw materials of the wave-transparent layer, disperse, and vulcanize to form the wave-transparent layer patch 11.

[0053] Preparing the high loss layer patch 12 : mixing the raw materials for the high loss layer, dispersing, and vulcanizing to form the high loss layer patch 12 .

[0054] Preparing the frequency selection layer 13: cutting according to the designed unit pattern to obtain the frequency selection layer 13.

[0055] Paste the high loss layer patch 12 on the surface of the frequency selective layer 13 , and paste the wave transparent layer patch 11 on the surface of the high loss layer patch 12 away from the frequency selective layer 13 .

[0056] When the dual-band broadband wave-absorbing patch 10 also inc...

Embodiment 1

[0062] This embodiment provides a dual-frequency broadband wave-absorbing patch 10, the dual-frequency broadband wave-absorbing patch 10 includes a wave-transparent layer patch 11 with a thickness of 2.5mm, a high-loss layer patch 12 with a thickness of 0.4mm, a thickness of A frequency selective layer 13 of 0.05 mm and a glass fiber reinforced plastic protective layer 14 with a thickness of 1 mm. The frequency selection layer 13 and the high loss layer patch 12 are pasted on the surface of one side of the frequency selection layer 13, and the wave transparent layer patch 11 is pasted on the surface of the side of the high loss layer patch 12 away from the frequency selection layer 13. The side of the layer 13 away from the high loss layer patch 12 is pasted on the surface of the FRP protective layer 14 .

[0063] The raw material of the wave-transparent layer patch 11 contains 6wt% of carbon black, 1wt% of zinc oxide, 1wt% of stearic acid, 1wt% of anti-aging agent, 1wt% of an...

Embodiment 2

[0072] The dual-frequency broadband wave-absorbing patch 10 provided in this embodiment includes a wave-transparent layer patch 11 with a thickness of 2.5mm, a high-loss layer patch 12 with a thickness of 0.4mm, a frequency-selective layer 13 with a thickness of 0.05mm, and a thickness of 0.5mm glass fiber reinforced plastic protective layer 14. The frequency selection layer 13 and the high loss layer patch 12 are pasted on the surface of one side of the frequency selection layer 13, and the wave transparent layer patch 11 is pasted on the surface of the side of the high loss layer patch 12 away from the frequency selection layer 13. The side of the layer 13 away from the high loss layer patch 12 is pasted on the surface of the FRP protective layer 14 .

[0073] The raw material of the wave-transparent layer patch 11 contains 6wt% of carbon black, 1wt% of zinc oxide, 1wt% of stearic acid, 1wt% of anti-aging agent, 1wt% of anti-mold agent, 2wt% of sulfur, 2wt% of BOP and 2wt% ...

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Abstract

The invention provides a dual-frequency broadband wave-absorbing patch and a preparation method thereof, and belongs to the technical field of electromagnetic wave-absorbing materials. The wave-absorbing patch comprises a wave-transparent layer patch, a high loss layer patch, and a frequency selective layer. The high loss layer patch is disposed on the surface of one side of the frequency selective layer, and the wave-transparent layer patch is disposed on the surface of one side of the high loss layer patch away from the frequency selective layer. The frequency selective layer is a conductivecloth provided with a periodic arrangement of unit patterns. The dual-frequency broadband wave-absorbing patch has a simple structure, a thin thickness, a small surface density, a good shape, dual-frequency broadband wave-absorbing performance, and convenience for construction and maintenance. The preparation method thereof comprises the following steps: preparing a wave-transparent layer patch,preparing a high loss layer patch, and preparing a frequency selective layer; attaching the high loss layer patch to the surface of one side of the frequency selective layer, and attaching the wave-transparent layer patch to the surface of one side of the high loss layer away from the frequency selective layer. The preparation method is simple, rapid, easy to operate and easy to control.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic wave absorbing materials, and in particular relates to a dual-frequency broadband wave-absorbing patch and a preparation method thereof. Background technique [0002] With the increasingly widespread and complex use of electronic equipment and weaponry, electromagnetic wave pollution and interference also increase accordingly, so the performance requirements for wave-absorbing materials are getting higher and higher. The dual-frequency absorbing material not only expands the absorption bandwidth, but also has flexible and adjustable absorption peaks, which can adapt to the requirements of the specified absorption frequency band. [0003] The design scheme of the commonly used dual-frequency flexible absorbing materials has the following disadvantages: some absorbing materials are often thicker, and the design flexibility of the absorbing frequency band is poor; some absorbing effective ban...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q17/00
CPCH01Q17/00H01Q17/008
Inventor 洪波王浩继尹生王锦
Owner AEROSPACE SCI & IND WUHAN MAGNETISM ELECTRON