Multilayer ultra-wideband wave-absorbing body based on electric loss material and magnetic material combination

A technology of magnetic materials and wave absorbers, applied in the direction of electrical components, antennas, etc., can solve the problems that the absorption strength and absorption width are difficult to meet the requirements, the reflection curve fluctuates violently, and the low-frequency absorption effect is not good.
CN110504553AActive Publication Date: 2019-11-26AEROSPACE SCI & IND WUHAN MAGNETISM ELECTRON
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
AEROSPACE SCI & IND WUHAN MAGNETISM ELECTRON
Publication Date
2019-11-26

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Abstract

The invention provides a multilayer ultra-wideband wave-absorbing body based on electric loss material and magnetic material combination, and belongs to the technical field of microwave electromagnetic stealth. A wave-absorbing structure comprises six resistance film layers, a magnetic absorption layer, a metal reflection layer and a resistance film interval supporting layer. The six resistance film layers and the magnetic material form a laminated structure; the interval between the every two resistance film layers is T; and the thickness of the magnetic layer is H. The unit structures of theresistance film layers are square array structures with the sizes of L1, L1, L3, L4, L5 and L6 from top to bottom, and the unit period is P. Based on the reasonable structural design of an electric loss material and a magnetic material, the ultra-wideband wave-absorbing effect is achieved, and high-intensity absorption is achieved in certain frequency bands; due to the symmetry of the structure,the structure is insensitive to the polarization of electromagnetic waves; and the broadband large-angle absorption effect is enhanced due to the gradual change design of the multiple resistance layers.
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Description

technical field

[0001] The invention relates to the field of microwave electromagnetic stealth technology, in particular to a multilayer ultra-broadband absorber based on the composite of electric loss material and magnetic material. Background technique

[0002] With the development of modern technology and the continuous enhancement of various detection technologies, the requirements for materials with broadband and electromagnetic wave absorption are getting higher and higher. Microwave absorbing materials can effectively absorb and attenuate incident electromagnetic waves and are widely used in military stealth, electromagnetic shielding and other electromagnetic protection. Traditional absorbing materials such as iron-based materials, carbon-based materials, etc., although these absorbing materials can achieve broadband absorption under a certain thickness, their absorption strength and absorption width are often difficult to meet the requirements.

[0003] Meng Fanzha...

Claims

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