室内UHF波段高精度RCS测试方法及定标技术研究  

Indoor accurate RCS measurement and scaling technique on UHF band

作　　者：李南京[1] 胡楚锋[1] 张麟兮[1] 

机构地区：[1]西北工业大学无人机特种技术国家重点实验室,陕西西安710072

出　　处：《系统工程与电子技术》2009年第9期2114-2116,共3页Systems Engineering and Electronics

摘　　要：针对UHF波段的RCS测试在室内精度较差的问题,给出了一种采用步进频率体制实现室内UHF波段高精度RCS测试的具体方法。基于高分辨能力的步进频率信号,依托高性能吸波材料和低散射泡沫支架优化测试背景环境,采用宽带对数周期天线作为收发天线进行准单站模式测量,运用多种数字信号处理技术校准测试误差,利用金属球在非光学区的频率特性进行定标,实现了室内UHF波段高精度RCS测试。通过实验验证,该方法可获取整个UHF波段的有效数据,对于直径为15 cm的金属球,全角域测试误差小于±1 dB。A detailed method for obtaining an accurate RCS measurement on UHF band is given by using stepped-frequency systems. Based on the stepped frequency signal, the quasi-monostatic measurement is carried out by relying on high performance absorbers and low scattering supports and employing two log-periodic dipole antennas, and many DSP techniques are applied to reduce the error. After scaling at the Rayleigh region of a metal sphere, the indoor accurate RCS measurement is completed on UHF band. Experimental resuhs show that the valid data can be got in the whole UHF band, and the full angular measuring error is less than ±1 dB for a metal sphere with a diameter of 15 cm.

关 键 词：雷达散射截面积 步进频率系统 UHF波段 定标 

分 类 号：TN958[电子电信—信号与信息处理]