基于极化状态配置的宽带相控阵极化控制方法  

Polarization control method for wideband phased array based on polarization state configuration

作　　者：王占领 庞晨 殷加鹏[1] 李永祯[1] 王雪松[1] WANG Zhanling;PANG Chen;YIN Jiapeng;LI Yongzhen;WANG Xuesong(College of Electronic Science and Technology,National University of Defense Technology,Changsha 410073,China)

机构地区：[1]国防科技大学电子科学学院,湖南长沙410073

出　　处：《系统工程与电子技术》2022年第3期795-801,共7页Systems Engineering and Electronics

基　　金：国家杰出青年科学基金(61625108);国家自然科学基金面上项目(61971429);国家自然科学基金青年科学基金(61701512)资助课题。

摘　　要：传统的固定极化状态存在交叉极化隔离度低且有效的扫描角度范围窄等问题,制约了相控阵雷达中极化信息的充分利用。为提高交叉极化隔离度,并解决宽带相控阵中波束方向图畸变问题,提出一种基于极化状态配置方法的宽带相控阵极化方向图综合方案。通过优化不同波束指向的极化状态,并利用有限长单位冲激响应(finite impulse response, FIR)数字滤波器建立宽带阵列方向图综合模型,实现对极化方向图的控制。仿真结果表明,该方法能够有效降低主极化和交叉极化方向图的频率响应,抑制主极化的旁瓣和交叉极化水平。将宽带相控阵的交叉极化隔离度在宽角扫描范围内保持在较高水平,能够满足实际极化相控阵应用的指标需求。The traditional fixed polarization state has the problems of low cross polarization isolation and narrow effective scanning angle range, which restricts the full utilization of polarization information in phased array radar. In order to improve the cross polarization isolation and solve the problem of beam pattern distortion in broadband phased array, a polarization pattern synthesis scheme of broadband phased array based on polarization state configuration method is proposed. By optimizing the polarization states of different beam directions and using finite impulse response(FIR) digital filter, a broadband array pattern synthesis model is established to control the polarization pattern. Simulation results show that this method can effectively reduce the frequency response of main polarization and cross polarization patterns, and suppress the side lobe and cross polarization level of main polarization. Keeping the cross polarization isolation of broadband phased array at a high level in the wide-angle scanning range can meet the index requirements of practical polarization phased array applications.

关 键 词：宽带相控阵雷达 交叉极化隔离度 极化状态配置 数字滤波器 

分 类 号：TN821.8[电子电信—信息与通信工程]