Radar cross section measurement technique of scale-model targets at terahertz
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摘要: 论述了国外基于微波上倍频、激光下变频、THz时域光谱三种典型太赫兹波目标雷达散射截面(RCS)缩比测试系统的构成、技术特点和应用范围。采用固态器件、基于微波上倍频技术集成研制了宽带太赫兹低频端目标RCS测量系统，采用基于扫频的时域法RCS测量技术和小角度旋转目标雷达合成孔径（ISAR）成像方法对小目标进行了电磁散射特性测量，获取了目标RCS和二维散射成像信息。Abstract: This paper reviews three kinds of terahertz (THz) radar cross section (RCS) measurement technologies, viz. microwave up-conversion, laser down-conversion and terahertz time-domain spectrum. Their characteristics like set-ups, specialties and applications are mainly introduced. We build a THz RCS measurement system with solid state components based on microwave up-conversion technology, and employ time-domain method based on the sweep and inverse synthetic aperture radar (ISAR) technologies to perform angle- and frequency-resolved RCS measurements on scale-model targets, then the 2D scattering image and RCS on targets are obtained.
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Key words:
- terahertz /
- microwave up-conversion /
- time-domain spectrum /
- radar cross section /
- scaled measurement
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