A novel two-layer periodic stepped structure for effective broadband radar electromagnetic absorption
A novel two-layer periodic stepped structure for effective broadband radar electromagnetic absorption
复制标题
一种新型两层周期性阶梯结构，用于有效宽带雷达电磁吸收
DOI：
10.1016/j.matdes.2017.03.044
复制
发表时间：
2017-06-05
影响因子：
8.4
通讯作者：
Zhang, Litong
中科院分区：
文献类型：
--
作者：
Zhou, Qian;Yin, Xiaowei;Zhang, Litong
This paper presents a novel ultra-broadband two-layer periodic stepped radar absorbing structure (PSRAS). The optimal PSRAS shows more than 90% absorption in the frequency range from 2.64 to 40.0 GHz by using a conventional a Fe reinforced epoxy resin composite. The greatly enhanced radar absorption property of designed PSRAS is a result of the multi-scale effect by combing effects of microscopic and mesoscopic scales. The designed PSRAS makes the effective impedance match to that of the free space in a wide frequency: most of the incident energy is dissipated by the simultaneous incorporation of multiple lambda/4 resonances, strong resonances between adjacent unit cells and edge diffraction effects. Based on the geometrical parameters optimization for the two-layer PSRAS, it is specified that size of unit cell obeys a simple rule of the Golden Section approximately. Additionally, the incident angle dependent absorption properties are simulated and discussed. It is expected that the proposed PSRAS composite has great potentials in stealth technologies and electromagnetic interferences. (C) 2017 Elsevier Ltd. All rights reserved.
