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

Volume

3

fYear

2003

Firstpage

1945

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 2003 IEEE MTT-S International

Conference_Location

Philadelphia, PA, USA

ISSN

0149-645X

Print_ISBN

0-7803-7695-1

Type

conf

DOI

10.1109/MWSYM.2003.1210539

Filename

1210539