Journal
IEEE SOLID-STATE CIRCUITS LETTERS
Volume 2, Issue 11, Pages 256-259Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LSSC.2019.2951423
Keywords
Frequency-modulated continuous wave (FMCW) radar; ranging; ultrawideband (UWB); vital-sign detection
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This letter presents an ultrawideband (UWB) radar for occupancy and vital signs detection. The proposed burst-chirp operation achieves >30x power reduction and abundant margin for the UWB spectrum regulations. With the proposed Domino chirp generation and time-domain predistortion, the radar has a fast chirp slope of 0.7 GHz/40 mu s and a low RMS error of 0.5 MHz. Fabricated in a 40-nm CMOS process, the presented radar consumes a record-low power of 680 mu W and can detect human respiration and heartbeat up to 15 and 5 m, respectively.
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