具有RCS减缩效果的超宽带仿生天线  

Bionic antenna with reduced RCS for ultra-wideband application

作　　者：刘英[1] 姜文[1] 龚书喜[1] 洪涛[1] 

机构地区：[1]西安电子科技大学天线与微波技术重点实验室,陕西西安710071

出　　处：《电波科学学报》2010年第3期548-552,共5页Chinese Journal of Radio Science

基　　金：国家自然科学基金资助项目(60801042)

摘　　要：基于仿生学原理和向日葵模型,研制了一种新型可用于雷达低可见平台的超宽带单极子天线。利用外边界为多段圆心角和半径相同的圆弧、内边界为圆的结构模拟向日葵花的形状。该仿生结构天线的辐射和散射特性进行了分析、优化,找出最适合作天线辐射单元的尺寸。并与参考天线作对比,发现在满足超宽带天线的相关指标要求下,仿生天线具有良好的RCS减缩效果;适用于对超宽带天线有低雷达截面要求的场合。利用仿生学减缩天线雷达截面的方法为天线隐身技术提供了新的方向。Based on bionics principle and the model of sunflower, a novel ultrawideband monopole antenna with low radar cross section（RCS） is presented for low-observable platforms. The bionic element has an outer boundary composed of several arcs of uniform radius and central angel and a circular inner boundary, which simulates the structure of sunflower. Simulation analysis for bionic structure is conducted and the optimized structure is obtained for antenna element. The radiating element of the proposed antenna is designed by using the model of sunflower. Radiation and scattering characteristics of the proposed antenna are studied and compared to those of a reference antenna. The results show that the bionic antenna has favorable UWB-related performances and lower RCS than the reference antenna. The proposed antenna serves as good candidate for the future design of UWB antennas with requirement of RCS control. The method of applying bionics to antenna RCS reduction charts a novel direction for antenna stealth.

关 键 词：雷达截面 单极子天线 仿生学 隐身 

分 类 号：TN821.8[电子电信—信息与通信工程]