High-sensitivity software-configurable 5.8-GHz radar sensor receiver chip in 0.13-μm CMOS for noncontact vital sign detection

Xiaogang Yu, Changzhi Li, Chien Ming Lee, Dong Li, Lixin Ran, Jenshan Lin

Research output: Contribution to journalArticle

78 Scopus citations

Abstract

In this paper, analyses on sensitivity and link budget have been presented to guide the design of high-sensitivity noncontact vital sign detector. Important design issues such as flicker noise, baseband bandwidth, and gain budget have been discussed with practical considerations of analog-to-digital interface and signal processing methods in noncontact vital sign detection. Based on the analyses, a direct-conversion 5.8-GHz radar sensor chip with 1-GHz bandwidth was designed and fabricated. This radar sensor chip is software configurable to set the operation point and detection range for optimal performance. It integrates all the analog functions on-chip so that the output can be directly sampled for digital signal processing. Measurement results show that the fabricated chip has a sensitivity of better than -101 dBm for ideal detection in the absence of random body movement. Experiments have been performed successfully in laboratory environment to detect the vital signs of human subjects.

Original languageEnglish
Article number5438822
Pages (from-to)1410-1419
Number of pages10
JournalIEEE Transactions on Microwave Theory and Techniques
Volume58
Issue number5 PART 2
DOIs
StatePublished - May 2010

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