Journal of Systems Engineering and Electronics ›› 2009, Vol. 31 ›› Issue (9): 2114-2116.

• 传感器与信号处理 • 上一篇    下一篇

室内UHF波段高精度RCS测试方法及定标技术研究

李南京, 胡楚锋, 张麟兮   

  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
  • 收稿日期:2008-07-15 修回日期:2008-11-24 出版日期:2009-09-20 发布日期:2010-01-03
  • 作者简介:李南京(1976- ),男,讲师,博士,主要研究方向为散射测量技术、微波成像、系统仿真.E-mail:linanjing76@163.com

Indoor accurate RCS measurement and scaling technique on UHF band

LI Nan-jing, HU Chu-feng, ZHANG Lin-xi   

  1. National Key Lab. of UAV Special Technique, Northwestern Polytechnic Univ., Xi’an 710072, China
  • Received:2008-07-15 Revised:2008-11-24 Online:2009-09-20 Published:2010-01-03

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15cm的金属球,全角域测试误差小于±1dB。

Abstract: 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 results 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.

中图分类号: