高交叉极化隔离度单偏置赋形反射面天线优化设计  

Optimal Design of Shaped Single Reflector Antenna for High Cross Polarization Isolation

作　　者：张新刚[1] 吴刚[1] 钟鹰[1] 

机构地区：[1]中国空间技术研究院西安分院,西安710100

出　　处：《火力与指挥控制》2012年第11期187-190,194,共5页Fire Control & Command Control

摘　　要：为获得高交叉极化隔离度性能,基于极小极大值算法对单偏置赋形反射面天线进行了优化设计。在赋形优化过程中采取了两个措施来提高天线的交叉极化隔离度,一个是利用归一化的电场来构建目标函数,以消除设计增益对优化过程的影响;另一个就是适当增大反射面的焦距。为了证明所述方法的有效性,以产生一个覆盖美国全部领土的赋形波束为例对天线进行了优化设计。数值仿真结果表明,在服务区内主极化增益都高于30dBi,交叉极化隔离度都在30 dB以上。To realize the high cross polarization isolation, the optimal design of a kind of single offset reflector antennas based on Minimax method is addressed. In the process of optimization, two measures is adopted. One is using the normalized electric field to construct the objective function to eliminate the interference of the devised gain, and the other is increasing the focal length properly, To illustrate the validity of methods, the contoured beam covering the American territory is optimized. The results show that the copolar gain is above 30 dBi and the cross polarization isolation is better than 30 dB in all coverage areas.

关 键 词：赋形波束 反射面天线 优化 极小极大值 

分 类 号：TN821[电子电信—信息与通信工程]