金属丝加载天线罩等效平板透波特性的GA优化  

Transmission performance optimization of wire-loaded radome dielectric slab using genetic algorithm

作　　者：徐欧[1] 徐金平[1] 刘晓春 王云[1] 

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

出　　处：《电波科学学报》2008年第3期514-519,共6页Chinese Journal of Radio Science

基　　金：国家自然科学基金委创新群体基金资助(60621002)

摘　　要：应用遗传算法(GA),对加载金属丝的天线罩等效平板结构的透波特性进行多参量、宽频带优化。采用传输矩阵法导出了等效平板结构的透射系数公式,并据此构造遗传算法的适应度函数,以金属丝加载天线罩等效平板中介质罩壁的厚度、金属丝的半径和布置间距为优化参量,编写了遗传算法程序并在指定带宽内对透波性能进行优化。通过与有限元法计算结果的对比,验证了适应度函数的正确性,分别对金属丝加载于天线罩壁中间和内表面两种等效平板结构的罩壁厚度、金属丝布置参数等进行了优化,优化结果可为天线罩工程研制提供设计参数。该算法优化速度快、计算效率高,可以为这种结构的电性能设计提供优化工具。Genetic Algorithm （GA） is employed to optimize the transmission property of the wire-loaded radome dielectric slab with multiple parameters and in broad band. The formulae of transmission coefficient of the slab are derived by transmission matrix method, and the fitness function in GA is constructed for optimizin g repeatedly the parameters such as thickness of radome wall, radii of wire, and spacings of wires to obtain the expected transmission performance. The correctness of the fitness function is validated by comparing the results with those obtained by finite element method （FEM）. Then GA is utilized to optimize the slab thickness, the wire spacing and wire radii of the radome dielectric slabs with wires loaded in the middle and on the surface of the slab wall. The optimization results can serve as the design parameter of practical radome structure. The presented algorithm provides a fast and efficient CAD tool for the design of the wire-loaded radomes.

关 键 词：金属丝加载平板 天线罩 遗传算法(GA) 传输矩阵法 

分 类 号：TN011[电子电信—物理电子学]