摘要
为了减缩微带阵列天线的带内雷达散射截面,设计了一种EBG结构的吸波超材料,从导纳圆图分析了其吸波机理。其厚度为0.3 mm,吸波率达到99.9%,将其加载于微带阵列天线贴片周围。仿真结果表明:阵列天线各个阵元的回波损耗和天线增益基本保持不变,在5.44~5.85GHz间法向RCS减缩达到3 d B,最大减缩达到16.1 d B。单站RCS在-40°^+40°角域、双站RCS在-90°^+90°角域得到了减缩,证实了该吸波结构有良好的吸波效果,可以用于微带阵列天线带内隐身。
To solve the problem of microstrip array antenna with the radar cross section reduction, an electromagnetic bandgap（EBG） absorbing metamaterial is designed, whose physical mechanism of ab- sorption is analyzed from admittance circle diagram. Its thickness is 0.3 mm and the absorption can reach 99.9%. It is loaded around the patch. The simulated result shows that the loaded antenna has scarce in- fluence on antenna＇ s radiation performance, while the radar cross section （RCS） of the novel antenna in boresight direction is reduced by 3 dB from 5.44 to 5.85 GHz, and the most reduction exceeds 16.1 dB. The monostatic and bistatic RCS reduction is from -40°to ＋ 40°and -90°to ＋ 90° ,which proves that the absorber has an excellent absorptivity and can be applied to microstrip array antenna to achieve in-band stealth.
出处
《现代防御技术》
北大核心
2016年第4期89-94,共6页
Modern Defence Technology
关键词
微带阵列天线
吸波超材料
雷达散射截面
天线散射截面
电磁带隙材料
方向图
microstrip array antenna
absorbing cross section
electromagnetic bandgap（EBG） materi metamaterial
radar cross section （RCS）
antenna al
directional pattern
