Title :
Range correlation effect on ISM band I/Q CMOS radar for non-contact vital signs sensing
Author :
Droitcour, A.D. ; Boric-Lubecke, O. ; Lubecke, V.M. ; Lin, J. ; Kovacs, G.T.A.
Author_Institution :
Center for Integrated Syst., Stanford Univ., CA, USA
Abstract :
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.
Keywords :
CMOS integrated circuits; CW radar; Doppler radar; biosensors; correlation methods; microwave oscillators; phase modulation; phase noise; remote sensing by radar; 0.25 micron; 50 cm; CW radar system; I/Q CMOS radar; ISM band; heart movement; noncontact vital sign sensing; oscillator phase noise; phase modulation; quadrature direct conversion microwave Doppler radar; range correlation effect; respiration movement; Doppler radar; Heart; Microwave oscillators; Noise measurement; Performance evaluation; Phase measurement; Phase noise; Radar detection; Radar measurements; Semiconductor device measurement;
Conference_Titel :
Microwave Symposium Digest, 2003 IEEE MTT-S International
Conference_Location :
Philadelphia, PA, USA
Print_ISBN :
0-7803-7695-1
DOI :
10.1109/MWSYM.2003.1210539
