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Active millimeter-wave imaging using raster scanner

: Hülsmann, A.; Liebelt, A.; Tessmann, A.; Leuther, A.; Schlechtweg, M.; Ambacher, O.


Ranney, K.I. ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
Radar sensor technology XIII : 13 - 15 April 2009, Orlando, Florida, United States
Bellingham, WA: SPIE, 2009 (Proceedings of SPIE 7308)
ISBN: 978-0-8194-7574-9
Paper 730808
Conference "Radar Sensor Technology" <13, 2009, Orlando/Fla.>
Fraunhofer IAF ()
millimeter wave imaging; Frequency Modulated Continuous Waves Radar (FMCW-Radar); voltage controlled oscillator

A millimeter-wave imaging system has been developed operating at a center frequency of 94 GHz. The system has a single stationary mounted transmit and receive lensed horn antenna and two moving mirrors in x and y. The beam is generated by a FMCW-radar module. The final beam aperture is an off-set parabolic mirror which focuses the beam to a small spot at 2 m distance. Key component of the FMCW radar module is a MMIC, which includes a VCO, a MPA/HPA, two Lange-couplers, an LNA , a Wilkenson splitter, and an I/Q-mixer. This MMIC is fabricated using IAF's 100 nm metamorphic HEMT process.