Structural wave-absorbing material with adjustable active frequency selective surface based on PIN (positive intrinsic negative) diode

Abstract

The invention discloses a structural wave-absorbing material with an adjustable active frequency selective surface based on a PIN (positive intrinsic negative) diode. The structural wave-absorbing material comprises a plurality of wave-absorbing structure units arranged in arrays, wherein every two wave-absorbing structure units are connected by a connection line; each wave-absorbing structure unit comprises a base layer, an intermediate layer and a surface layer, the intermediate layer is attached on the base layer, the surface layer is attached on the intermediate layer, the surface layer consist of a patch type frequency selective surface and a PIN diode, the shape of the patch type frequency selective surface is a dipole pattern, and the PIN diode is welded at the center of the dipole pattern. According to the invention, the structural wave-absorbing material with adjustable wave-absorbing performance is manufactured by utilizing the PIN diode loaded with an active frequency selective surface design, a working state of the PIN diode can be dynamically adjusted, and the wave-absorbing performance of the structural wave-absorbing material can be actively adjusted; and meanwhile, the structural wave-absorbing material has the characteristics of thin thickness, light weight and large absorption frequency bandwidth.

Description

technical field [0001] The invention belongs to the field of structural wave-absorbing materials, and more specifically relates to a structural wave-absorbing material based on a PIN (Positive Intrinsic Negative) diode with an adjustable active frequency selection surface. Background technique [0002] Absorbing materials have begun to be applied to the stealth design of aircraft, missiles and other weapon platforms. Traditional microwave-absorbing coatings such as ferrite, metal micropowder, and polycrystalline iron fiber have certain limitations in specific applications due to their high density, high maintenance costs, and difficulty in achieving broadband absorption. [0003] Structural absorbing materials are more suitable for the integrated design of aircraft, missiles and other weapon platforms because they can realize the integration of absorbing and bearing. Structural absorbing materials based on metamaterials are difficult to achieve broadband absorption effects ...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the defects of the prior art, the purpose of the present invention is a structure absorbing material based on PIN diode active frequency selection surface adjustable, aiming to solve the problem that the existing structure absorbing material cannot realize the dynamic adjustment of absorbing performance

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