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High-bandwidth 220 GHz experimental radar

Ein 220-GHz-Experimentalradar mit hoher Bandbreite
: Essen, H.; Wahlen, A.; Sommer, R.; Johannes, W.; Brauns, R.; Schlechtweg, M.; Tessmann, A.


Electronics Letters 43 (2007), No.20, pp.1114-1116
ISSN: 0013-5194
Journal Article
Fraunhofer IAF ()
Radar; ISAR; ISAR imaging; ISAR Bildgebung; G-Band; FMCW radar; MMIC; scattering centre distribution; Streuzentren-Verteilung; concealed weapon detection (CWD); Detektion versteckter Waffen

An experimental radar at 220 GHz has been developed, which is capable of delivering an instantaneous bandwidth of 8000 MHz. The solid-state radar uses an FM-CW waveform. The development is based on experience with a 94 GHz broadband measurement radar. The data undergo an ISAR imaging process to derive high-resolution scattering centre distributions for targets measured in tower=turntable configuration. High-resolution processing algorithms have been developed, which result in scattering centre distributions with a resolution better than 2 cm at ranges of and exceeding 200 m. The radar will be used for investigations on target signatures of small objects for stand-off detection of concealed weapons and other threat material.