基于UC-EBG的吸波结构设计及其在微带天线中的应用*

基于UC-EBG的吸波结构设计及其在微带天线中的应用

内容简介：在共面紧凑型光子晶体结构（Uniplanar Compact Electromagnetic Bandgap，UC-EBG）基础上加载集总电阻，设计出一种新型吸波结构，并分析了其吸波原理。将其加载于微带天线，用于减缩天线带内雷达散射截面（Radar Cross Section，RCS）。仿真结果表明，在谐振频点，该吸波结构的吸波率达到99.8％。加载该结构后，天线的辐射性能基本保持不变，而对于垂直入射的TE波和TM波，其带内RCS分别减缩了26.22 dB和15.08 dB。实测结果与仿真结果较为吻合，证实了该结构可以减缩微带天线的带内RCS，从而提高其带内隐身性能。

Abstract： A novel absorber is proposed based on Uniplanar Compact Electromagnetic Bandgap(UC-EBG)with lumped resistance,and its operating mechanism is analyzed. The new absorber is loaded on microstrip antenna to reduce antenna′s in-band Radar Cross Section(RCS). The simulated result shows that its absorptivity reaches 99.8% at operating frequency. The loaded antenna′s radiation performance has not been influenced a lot,while for the incident wave of TE and TM mode,the in-band RCS of antenna has declined by 26.22 dB and 15.08 dB respectively. There is a good agreement between measured and simulated results,which verifies that this ab-sorber can be used for reduction of antenna′s in-band RCS so as to improve its in-band stealth performance.

作者：张浩, 曹祥玉, 杨欢欢, 赵一, 郑秋容,

关键词：微带天线, 吸波结构, UC-EBG, 带内隐身, RCS缩减,