Terahertz radar cross section measurements

被引：84

作者：

Iwaszczuk, Krzysztof ^{[1
]}

Heiselberg, Henning ^{[2
]}

Jepsen, Peter Uhd ^{[1
]}

机构：

[1] Tech Univ Denmark, Dept Photon Engn, DTU Foton, DK-2800 Kongens Lyngby, Denmark

[2] Danish Def Acquisit & Logist Org, DK-2750 Ballerup, Denmark

来源：

OPTICS EXPRESS | 2010年 / 18卷 / 25期

关键词：

ULTRASHORT LASER-PULSES; OPTICAL RECTIFICATION; LIGHT-SCATTERING; RADIATION; GENERATION; FRONTS;

D O I：

10.1364/OE.18.026399

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We perform angle- and frequency-resolved radar cross section (RCS) measurements on objects at terahertz frequencies. Our RCS measurements are performed on a scale model aircraft of size 5-10 cm in polar and azimuthal configurations, and correspond closely to RCS measurements with conventional radar on full-size objects. The measurements are performed in a terahertz time-domain system with freely propagating terahertz pulses generated by tilted pulse front excitation of lithium niobate crystals and measured with sub-picosecond time resolution. The application of a time domain system provides ranging information and also allows for identification of scattering points such as weaponry attached to the aircraft. The shapes of the models and positions of reflecting parts are retrieved by the filtered back projection algorithm. (C)2010 Optical Society of America

引用

页码：26399 / 26408

页数：10

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