新型双频复合相控阵天线设计及高效辐射特性分析方法

Novel Dual-frequency Compound Phased Array Antenna Design Based on Effective Radiation Characteristic Analytical Method

针对导引头双频复合相控阵天线设计中存在的双频阵元布局冲突、仿真硬件及时间开支过大、方向图仿真精度差等问题,采用分层复合架构来实现双频阵元的自由布局,并提出一种共口径复合阵面辐射特性分析方法,实现对天线性能的高效准确仿真。该方法根据双频复合阵元的设计优化参数,在考虑阵元互耦、边界截断以及辐射遮挡效应影响的前提下,基于Floquet模式实现完整双频复合阵面的高精度辐射特性分析,由此支撑高效的复合阵面方向图分析与稀布优化。

Dual-frequency compound phased array antenna on seeker usually has problems such as dual-frequency array elememts layout conflict,overspending simulation resources and poor simulation accuracy of radiation pattern.In order to solve these problems,a layered structure is used to realize the free layout of dual-frequency array elements,and an efficient analytical method of shared-aperture array radiation characteristics is proposed to realize accurate simulation of antenna performances.The analytical method makes use of antenna parameters determined by optimization of dual-frequency array,the radiation characteristics of entire array can be confirmed by Floquet periodicity,which considers mutual coupling,boundary truncation and radiation block.Finally,effective radiation pattern analysis and sparse distribution optimization are realized.