超材料低红外发射率双频带雷达吸波体结构设计

Dual-Band Radar Absorber with Low Infrared Emissivity based on Metamaterial

摘要:

本研究针对低红外发射率红外隐身与双频带雷达吸波兼容的应用需求，提出一种基于超材料的低红外发射率双频带雷达吸波体结构。该结构的红外隐身层采用方形金属贴片，双频带雷达吸波体由开口方环与“米”字结构相结合的谐振层、介质层和金属反射层构成。研究表明，该结构在3 ~14 μm波段内可获得0.316的低红外发射率，同时在9.04 GHz和14.67 GHz处可分别实现94.23%和99.94%的吸收率，且具有良好的角度不敏感性。此外，通过调整结构参数可以对吸波频率进行调控。还对吸收频率处的电场、磁场和表面电流分布进行了仿真分析，深入阐明了该结构的电磁吸收机制。本研究为红外雷达兼容隐身技术的发展提供了新的思路和可能性。

Abstract:

To address the critical demand for compatible low infrared emissivity and dual-band radar absorption, this study proposes a novel dual-band radar absorber with low infrared emissivity, which is made of an infrared stealth layer and a dual-band radar absorbing structure. The infrared stealth layer is designed as a square metal patch array. The dual-band radar absorber consists of a resonant layer, a dielectric layer, and a metal reflector layer, in which the resonant layer consists of an open square ring combined with a symmetrical eight-arm cross-diagonal pattern. The results show that the infrared emissivity of the novel structure is as low as 0.316 in the band of 3-14 μm, the effective absorption rates are 94.23% and 99.94% at 9.04 GHz and 14.67 GHz respectively, and the structure exhibits wide-angle stability. Furthermore, the absorption frequencies can be changed through parameter optimization. The electric field, surface current and magnetic field are simulated at resonant frequency to explain the dual-band absorption mechanism. This study provides new approaches and possibilities for the development of infrared-multiband radar stealth-compatible technology.