Range correlation effect on ISM band I/Q CMOS radar for non-contact vital signs sensing

A quadrature direct conversion microwave Doppler radar has been fully integrated in 0.25 /spl mu/m CMOS. This ISM band radar chip has been used to detect heart and respiration movement 50 cm from the subject. While oscillator phase noise is a performance-limiting factor in CW radar systems, the rang...

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Bibliographic Details
Main Authors: Droitcour, A.D., Boric-Lubecke, O., Lubecke, V.M., Lin, J., Kovacs, G.T.A.
Format: Conference Proceeding
Language:English
Subjects:
Doppler radar
Heart
Microwave oscillators
Noise measurement
Performance evaluation
Phase measurement
Phase noise
Radar detection
Radar measurements
Semiconductor device measurement
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Summary:A quadrature direct conversion microwave Doppler radar has been fully integrated in 0.25 /spl mu/m CMOS. This ISM band radar chip has been used to detect heart and respiration movement 50 cm from the subject. While oscillator phase noise is a performance-limiting factor in CW radar systems, the range correlation effect enables measurement of small phase modulations in spite of the notoriously high phase noise of the on-chip CMOS oscillator. This is the first reported quantitative experimental verification of the range correlation effect.
ISSN:0149-645X
2576-7216
DOI:10.1109/MWSYM.2003.1210539