29 May 2014 Very low-phase noise, coherent 94GHz radar for micro-Doppler and vibrometry studies
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Abstract
Micro-Doppler and vibrometry measurements require coherent radars with low phase noise. We report the development of a novel, very low phase noise 94 GHz radar, called T-220, which offers superior performance for micro-Doppler and vibrometry studies compared with our previous work. The radar uses a combination of direct digital synthesis (DDS) chirp generation, frequency upconversion and frequency multiplication to yield very low phase noise and rapid, contiguous chirps, necessary for Doppler studies and other coherent processing applications. Dual fan beam antennas are used to achieve negligible transmit-receive leakage, with fine azimuth resolution and modest elevation coverage. The resulting PPI imagery is very high fidelity with little or no evidence of phase noise effects.
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Duncan A. Robertson, Duncan A. Robertson, Graham M. Brooker, Graham M. Brooker, Patrick D. L. Beasley, Patrick D. L. Beasley, } "Very low-phase noise, coherent 94GHz radar for micro-Doppler and vibrometry studies", Proc. SPIE 9077, Radar Sensor Technology XVIII, 907719 (29 May 2014); doi: 10.1117/12.2053015; https://doi.org/10.1117/12.2053015
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