目标低频RCS的紧缩场测试研究  

The Measurement Research of Target Low-frequency RCS in the CATR

作　　者：潘宇虎[1,2] 李小秋[1,2] 牛宝君[1,2] 高铁[1,2] 何丙发[1,2] 

机构地区：[1]南京电子技术研究所,南京210039 [2]天线与微波技术国防科技重点实验室,南京210013

出　　处：《现代雷达》2011年第12期55-57,共3页Modern Radar

摘　　要：紧缩场低频工作时边缘绕射明显增强,且微波暗室内有限高度的吸波材料低频性能相对较差,使得紧缩场静区的低频幅相特性起伏变大,静区背景电平升高,从而导致紧缩场的目标低频雷达横截面(RCS)测试精度相对高频段会变差。此外,定标球在低频段呈现的RCS振荡幅度较大,也对测试结果带来不确定性。针对紧缩场进行目标低频RCS测试精度的实验研究,并将被测目标的RCS实验值和理论值进行对比,验证了该紧缩场的低频RCS测试性能可满足目标的低频RCS性能测试需求。Edge diffraction of compact range will obviously enhance at low frequency, and radar absorbing material of limited height in the anechoic chamber will be worse at low frequency. The ripple of amplitude and phase in quiet-zone of CATR will enlarge and background level will rise. Therefore, the target low-frequency RCS measurement accuracy of the CATR will be worse than at high-frequency. Furthermore, large oscillating amplitude of calibration sphere at low-frequency will also increase uncertainty of RCS measurement. The detailed measurement research of target low-frequency RCS have been done , and compare experiment result with simulation result of the target low-frequency RCS. It is proved that the target low-frequency RCS measurement accuracy can satisfy the target low-frequency RCS measurement requirements.

关 键 词：紧缩场 雷达散射截面 低频RCS测试 测试精度 

分 类 号：TN957[电子电信—信号与信息处理]