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Multilayer electromagnetic wave absorbing structure

A technology of wave structure and electromagnetic wave, applied in the field of electromagnetic wave absorbing structure and its design, to achieve the effect of strong operability, good wave absorbing performance and simple process

Active Publication Date: 2016-12-14
成都佳驰电子科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Foam layer is lightweight polymethacrylimide foam

Method used

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  • Multilayer electromagnetic wave absorbing structure
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  • Multilayer electromagnetic wave absorbing structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A 4-layer light-weight broadband square pattern absorbing structure, its specific size parameters are (in mm): a 1 =15.7, l 1 =15, w 1 =5.2, d 1 =5, r 1 =50Ω / □; a 2 =15.7,l 2 =11.1,w 2 =8.1, d 2 =5, r 2 =70Ω / □; a 3 =15.7, l 3 =15, w 3 =13.6, d 3 =5, r 3 =50Ω / □; a 4 =14.3, l 4 =15, w 4 =12.6, d 4 =5, r 4 =70Ω / □.

[0021] In the case of vertically incident TE or TM waves, this embodiment has Figure 4 The absorbing performance shown. The entire frequency band of 2-18GHz has a reflection coefficient below -10dB, the frequency band of 2.3-18GHz has a reflection coefficient of below -13dB, and the frequency band of 2.5-15GHz has a reflection coefficient of approximately -15dB or less.

Embodiment 2

[0023] A two-layer light-weight broadband square pattern absorbing structure, its specific size parameters are (in mm): a 1 =17,l 1 =16.5,w 1 =8.5, d 1 =5, r 1 =75Ω / □; a 2 =17,l 2 =16.5,w 2 =6.5, d 2 =5, r 2 =110Ω / □.

[0024] In the case of vertically incident TE or TM waves, this embodiment has a reflection coefficient below -7.5dB in the entire frequency band of 2-18GHz, and the frequency bands of 2.3-9.6GHz and 11-17.6GHz have reflection coefficients below -10dB.

Embodiment 3

[0026] A 6-layer light-weight broadband square pattern absorbing structure, its specific size parameters are (in mm): a 1 =12.3, l 1 =11.3, w 1 =6.8, d 1 =5, r 1 =71Ω / □; a 2 =12.3,l 2 =12.3, w 2 =6.6, d 2 =5, r 2 =230Ω / □; a 3 =12.3, l 3 =11.3, w 3 =7.6, d 3 =5, r 3 =230Ω / □; a 4 =12.3, l 4 =10, w 4 =7,d 4 =5, r 4 =230Ω / □; a 5 =12.3,l 5 =10,w 5 =6.1, d 5 =5, r 5 =600Ω / □; a 6 =12.3, l 6 =10,w 6 =7.3, d 6 =5, r 6 =800Ω / □.

[0027] In the case of vertically incident TE or TM waves, this embodiment has a reflection coefficient below -20dB in the entire frequency band of 2-18GHz.

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Abstract

The invention discloses a multi-layer electromagnetic wave-absorbing structure and a preparation method and belongs to the technical field of electronic materials. At least two wave-absorbing structure layers are arranged on a metal substrate, wherein each wave-absorbing structure layer comprises a plurality of same wave-absorbing units; each wave-absorbing unit consists of a foaming layer and a square resistive film arranged on the foaming layer; and the foaming layer is made from a light polymethacrylimide foaming material. The multi-layer electromagnetic wave-absorbing structure is simple in process, high in operability and low in cost. The main material is foam, so that the density is low.

Description

technical field [0001] The invention belongs to the technical field of electronic materials, in particular to an electromagnetic wave-absorbing structure and a design method thereof. Background technique [0002] Since World War II, radar absorbing materials have become the research focus of various countries. Especially due to the development of stealth technology, radar absorbing materials, as an effective means to improve the survivability and penetration capabilities of weapon systems, are firstly valued in the military. At present, many electronic devices have penetrated into various fields of real life. These electronic devices radiate electromagnetic waves into the environment, causing serious pollution, such as electromagnetic interference, electromagnetic compatibility, and a series of electromagnetic wave pollution that is harmful to organisms. Therefore, radar absorbing materials are also widely used in civil applications such as information dissemination, elect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05K9/00B32B15/08B32B9/04B32B3/14
Inventor 邓龙江张辉彬陆海鹏谢建良梁迪飞周佩珩陈良
Owner 成都佳驰电子科技股份有限公司
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