摘要
提出一种天线空域极化特性的外场测量方法.该方法引入金属球和二面角两种定标体作为雷达目标进行观测,建立雷达天线波束扫掠目标的回波信号模型.推导了天线空域极化特性的测量方程,通过对回波电压样本的处理和求解获得天线的极化特性,并给出了完整的解析表达式和可用于工程实际的测量步骤.实测数据和仿真实验表明,该方法能有效降低设备量和测量成本,提高雷达远场预报的逼真度.
Measurement of far-field of antenna is studied in this paper. The proposed method introduces a metallic ball and a dihedral calibrator as radar target for observation. A model is built for the signal received from the antenna that scans the target. A measurement equation for the antenna polarization characteristic is derived. By processing and solving the echo-voltage samples, the polarization characteristics of the antenna are obtained. The analytical expression and practical procedure are presented. Validity of the method is shown by processing of the observation data and simulation. The method can greatly reduce the development complexity and production cost of the field test, and increase fidelity of the predicted far field.
出处
《应用科学学报》
CAS
CSCD
北大核心
2009年第6期606-611,共6页
Journal of Applied Sciences
基金
国家自然科学基金(No.60736006
No.60802078)
"十一五"总装备部武器装备预研项目基金(No.51309060305)
国防科技大学博士研究生创新项目基金(No.B090401)资助
关键词
天线测量
空域极化特性
外场测量
定标体
极化散射矩阵
目标特性
antenna measurement
spatial polarization characteristic
external field test
calibrator
polarization scattering matrix
target characteristic
