摘要
基于互补开口谐振环奇异的折射率特性,研制了一种可用于雷达低可见平台的新型微带天线。采用等效分析方法对CSRR结构的等效媒质参数加以研究,并将其应用于普通微带天线非辐射边一侧的接地板上,在保证天线辐射特性基本不变的同时使散射波远离镜像方向,从而实现在空域中的带外雷达散射截面积减缩。仿真和测试结果表明,加载CSRR结构的微带天线仍为线极化,前向增益仅损失0.32dB,对于不同角度入射波镜像方向RCS均有减缩,其中法线方向RCS最大减缩量达到7.8dB.该设计具有低成本、设计简单、便于加工、利于共形等优点,为天线RCS减缩提供了新思路。
Based on the peculiar refractive index feature of complementary split-ring resonator （ CSRR）, a novel low-visible platform mierostrip antenna is proposed. Equivalent analysis method has been adopted to study the refractive index of a CSRR structure. By loading the structure on the nonradiative side of the antenna ground plane and distract the scattered waves from mirror direction, a spatial reduction of out-bands radar cross section （RCS） is achieved, while the radiation per-formanee is kept. Simulation and measured results demonstrate that the novel mierostrip antenna maintains linear-polarization and get 7.8dB nose aspect RCS reduction with only 0.32dB positive gain loss. The design owns the merits of low cost, sim-ple design, easy for fabrication and conformation, providing a new idea for antenna RCS reduction.
出处
《微波学报》
CSCD
北大核心
2013年第3期18-22,共5页
Journal of Microwaves
关键词
梯度折射率
互补开裂环结构
微带天线
雷达截面减缩
gradient index, CSRR（ complementary split-ring resonators）, microstrip antenna, RCS （ Radar Cross Sec-tion） reduction
