基于极化转换表面和电阻性FSS的双频吸波结构  

A Dual Band Microwave Absorber Based on Polarization Conversion Material and Resistive FSS

作　　者：姜昊 李燕平 刘翔 贾朝文 JIANG Hao;LI Yanping;LIU Xiang;JIA Chaowen(Southwest China Research Institute of Electronic Equipment,Chengdu 610036,China)

机构地区：[1]西南电子设备研究所,成都610036

出　　处：《电子信息对抗技术》2021年第1期85-89,共5页Electronic Information Warfare Technology

摘　　要：设计了一款基于周期性排布的极化转换表面(PCM)和阻抗型频率选择表面(RFSS)的双频段RCS缩减结构。其中,PCM的单元结构是由印刷在介质板两面的正方形金属贴片和金属地板组成,两个中心对称排布的金属柱将贴片和地板连通。仿真结果表明,所设计的PCM可以在40%的带宽内达到90%以上的极化转换率。所提出的RFSS单元放置在PCM单元之上,由印刷型的氮化钽方环构成。整体的吸波结构由棋盘式排布的PCM单元和RFSS单元组成。通过调节PCM和RFSS的设计参数,所设计的吸波结构能够在2~3GHz和7.8~12.4GHz实现10dB以上的RCS缩减性能。A novel dual-band RCS reduction(RCSR)structure which is realized by periodical arranged polarization conversion material(PCM)and printed resistive frequency selective surface(RFSS)is presented.The unit cell of the PCM consists of a square patch printed on a substrate,which is backed by a metallic ground.Two metallic pins are arranged symmetrically between the patch and the ground,and a 39.6%polarization conversion bandwidth is realized with a high polarization conversion ratio(PCR)of 90%.The proposed RFSS consists of a periodic array of tantalum nitride loops,which is located upon the patch of the PCM.Furthermore,chessboard configuration is applied to achieve a wideband RCSR.By properly designing the parameter of the PCM and the RFSS,a dual band-10 dB RCSR from 2.9 GHz to 3.8 GHz and 7.9 GHz to 12.4 GHz is achieved.

关 键 词：RCS缩减 极化转换材料 电阻性频率选择表面 吸波结构 

分 类 号：TM25[一般工业技术—材料科学与工程]