Dual-band wave absorption frequency selective surface system, design method and aircraft

Abstract

The invention belongs to the technical field of a microwave technology and an aircraft stealth technology, and discloses a dual-band wave absorption frequency selective surface system, a design methodand an aircraft. The dual-band wave absorption frequency selective surface system is provided with a dielectric support plate, resistant thin film square rings and a circular-groove frequency selective surface, wherein the resistant thin film square rings are periodically arranged on an upper surface of the dielectric support plate, the circular-groove frequency selective surface is arranged on alower surface of the dielectric support plate and comprises a dielectric plate and a metal layer, the metal layer is arranged on an upper surface of the dielectric plate, the thickness of the metal layer is not considered, and circular grooves are periodically formed in the metal layer. By the dual-band wave absorption frequency selective surface system, k-band wave transparent / dual-band wave absorption can be achieved, an array pattern is compact, and good stability is achieved under an oblique incidence condition; the dual-band wave absorption frequency selective surface system is simple instructure; compared with a multi-layer structure, the dual-band wave absorption frequency selective surface system is only provided with the upper-layer resistant film, the intermediate-layer dielectric support plate and the lower-layer frequency selective surface, and is lighter and is lower in profile; and a transition band between the wave transparent band and the wave absorption band is small, and the wave absorption effect is good.

Description

technical field [0001] The invention belongs to the field of microwave technology and aircraft stealth technology, and in particular relates to a dual-band microwave-absorbing frequency selection surface system, a design method, and an aircraft. Background technique [0002] At present, the commonly used existing technology in the industry is as follows: for aircraft targets, when encountering enemy radar detection, the threat mainly comes from the direction of the nose cone, and the radar antenna system of the aircraft is one of the main scattering sources in this direction, so the reduction of radar The RCS of the antenna system is crucial to the stealth of the aircraft. At present, the measure to realize the frequency domain stealth of the radar antenna system is mainly to load the frequency selection surface on the radar radome, and to achieve the purpose of stealth by reflecting the incoming wave of the radar in the main threat direction to other directions, which can e...

AI Technical Summary

Problems solved by technology

[0003] To sum up, the problems existing in the existing technology are: the existing wave-absorbing frequency selection surface has poor wave-transmitting effect, and the transition bandwidth of wave-absorbing / transmitting

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