基于非匀速旋转单天线PARC的极化校准方法  

A New Scheme of Polarization Calibration Using Polarimetric Active Radar Calibrator(PARC)with Single Rotatable Antenna

作　　者：黄婧[1] 李永祯[1] 何密 李棉全[1] 肖顺平[1] 

机构地区：[1]国防科技大学电子信息系统复杂电磁环境效应国家重点实验室,湖南长沙410073 [2]第三军医大学-重庆大学生物医学工程联合学院,重庆400038

出　　处：《雷达科学与技术》2015年第1期90-94,共5页Radar Science and Technology

基　　金：国家自然科学基金(No.60802078;61401488)

摘　　要：由于大口径天线远场条件苛刻、杂波多径影响大,使得大型地基雷达的极化校准成为雷达工程技术领域的难点问题,频域动态极化校准算法是一种很好的解决方案,但存在极化有源校准器收/发天线隔离度低、天线方向图不对称等问题,导致极化校准的精度降低。针对上述问题,提出了一种基于非匀速旋转单天线PARC(Polarimetric Active Radar Calibrator)的极化校准方法,能够克服传统频域动态校准算法的缺点,有效提高雷达极化校准的精度。Because the far field condition of large aperture antenna is rigorous,and the effects of clutter and multi-path are sensitive,the polarization calibration for large aperture ground based radar is an urgent problem in radar engineering technical field.The dynamic polarimetric calibration（DPC）in frequency domain is a good solution to solve this problem,but the low isolation between transmit and receive antennas,as well as the asymmetry of antenna pattern,will result in the decrease of the polarization calibration accuracy.This paper designs a single rotatable dual-polarized antenna polarimetric active radar calibrator（PARC）and proposes a corresponding DPC method.The simulations verify that the single dual-polarized antenna DPC scheme possesses calibration accuracy better than the traditional double-antenna DPC scheme.

关 键 词：极化雷达 极化校准 有源校准器 误差分析 

分 类 号：TN957[电子电信—信号与信息处理]