多层介质金属条带电抗加载平板结构透波特性分析  

Transmission Property Analysis of Reactance-loaded Stratified Dielectric Slabs Sandwiched by Metal Stripes

作　　者：徐欧[1] 徐金平[1] 刘晓春 

机构地区：[1]东南大学毫米波国家重点实验室,南京210096 [2]航空一集团济南特种结构研究所,济南250023

出　　处：《微波学报》2008年第3期28-32,共5页Journal of Microwaves

基　　金：国家自然科学基金委创新群体基金(60621002)

摘　　要：应用有限元法(FEM)结合Floquet定理分析金属条带电抗加载的多层介质平板结构的电磁特性,并应用该算法模拟电抗加载雷达罩平板结构的透波性能。针对加载周期性、任意截面形状金属条带的多层介质平板结构建立了FEM算法模型并用C++语言编程实现;应用该算法首先分析了加载矩形截面金属条带、以金属为衬底的介质平板的散射特性,数值结果与文献报道结果一致,验证了理论模型与计算程序的正确性;在此基础上,计算了加载细金属丝的雷达罩平板结构的功率传输系数,考察了将金属丝加载于雷达罩壁的不同位置、金属丝的不同间距对电抗加载平板透波性能的影响。数值结果表明,该方法可以有效地分析电抗加载雷达罩平板结构的透波特性。The transmission properties of reactance-loaded stratified dielectric slabs, especially of reactance-loaded radome wall geometries are analyzed employing Finite Element Method（FEM） in combination with Floquet theorem. FEM approach is formulated and the relevant C＋＋ codes are developed to deal with the stratified dielectric slabs sandwiched by periodical metal strips of arbitrary cross sections. The scattering property of a PEC ended dielectric slab with metal strips of rectangular cross section is investigated and the result agrees with that of the reference, thus the correctness of FEM formulation and the reliability of codes are validated. Subsequently, the transmission coefficients of a radome dielectric slab sandwiched by wire gratings are calculated. Then the transmission abilities of reactance-loaded radome dielectric slabs with different grating spacings and locations are investigated. Numerical results indicate that this method provides an efficient way to predict the transmission properties of reactance-loaded radome dielectric slabs.

关 键 词：电抗加载雷达罩 有限元法 FLOQUET定理 

分 类 号：TN957.2[电子电信—信号与信息处理]