微波暗室低散射目标RCS测量方法  

Research on radar cross section measurement method of low-scattering objects in microwave anechoic chamber

作　　者：刘君[1] 马瑶[1] 渠立永[1] 郭益民[1] 

机构地区：[1]解放军理工大学野战工程学院,江苏南京210007

出　　处：《解放军理工大学学报（自然科学版）》2013年第1期19-24,共6页Journal of PLA University of Science and Technology(Natural Science Edition)

摘　　要：为提高微波暗室低散射目标雷达散射截面(RCS)的测试精度,采用设置吸波墙、扫频RCS时域测量、匹配滤波和合理选用窗函数的方法测量了低散射目标的RCS,得到了目标宽带RCS数据和精细的频率特性。设置吸波墙的方法使小金属球的回波信杂比提高了20dB,扫频宽带RCS时域测量值与理论值吻合良好。实测数据分析表明,扫频时域测量目标宽带RCS能减弱杂波叠加导致的不利波动,设置吸波墙和匹配滤波能显著抑制目标近距离处的转台和支架杂波,窗函数的平坦通带特性能减小数据截短影响,从而有效提高低散射目标RCS测试精度。To improve the radar cross section （RCS） measurement precision of low scattering objects in ane- choic chamber, methods such as microwave absorption wall, wide band frequency RCS measurement in time domain, matched filtering and sine window were applied to measure RCS of three objects. The wide band frequency RCS and high precision RCS varying with frequency were obtained. Setting microwave ab- sorption wall improves the signal clutter ratio by 20 dB, and the wide band frequency RCS measurement result coincides with the theoretical data. It shows that the wide band frequency RCS measurement in time domain restrains the drawback of fluctuation, that the setting microwave absorption wall and the matched filte- ring obviously suppress the clutter of the turntable and foam base, and that the flat bandpass of sine window can minimize the effect of data-cutoff. These methods effectively improve the RCS measurement precision.

关 键 词：微波暗室 宽带雷达散射截面 匹配滤波 

分 类 号：TN958[电子电信—信号与信息处理]