Mutual injection-locked SIL sensor array for vital sign detection with random body movement cancellation

Author

Wang, Fu-Kang ; Horng, Tzyy-Sheng ; Peng, Kang-Chun ; Jau, Je-Kuan ; Li, Jian-Yu ; Chen, Cheng-Chung

Author_Institution

Dept. of EE, Nat. Sun Yat-Sen Univ., Kaohsiung, Taiwan

fYear

2011

fDate

5-10 June 2011

Firstpage

1

Lastpage

4

Abstract

This paper presents a self-injection-locked (SIL) sensor array for cancelling the effects of random body movement on the detection of vital signs. To achieve this goal, a subject is seated between two SIL sensors to measure rates of respiration and heartbeat using the Doppler shift, and the effects of random movements by the subject are cancelled by wireless mutual injection locking (MIL) of the two sensors. In the experiments, a prototype for such a two-sensor array with a spacing of 2 m was implemented at 2.4 GHz, providing accurate and reliable cardiopulmonary monitoring of a subject who exhibited random body motions of several centimeters.

Keywords

Doppler shift; biomedical measurement; cardiovascular system; patient monitoring; Doppler shift; cardiopulmonary monitoring; heartbeat; mutual injection-locked SIL sensor array; prototype; random body movement cancellation; respiration; self-injection-locked sensor array; vital sign detection; Arrays; Baseband; Delay; Doppler shift; Monitoring; Oscillators; Signal to noise ratio; Self-injection-locked (SIL) sensor; cardiopulmonary monitoring; mutual injection locking (MIL); random body movement; vital sign;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest (MTT), 2011 IEEE MTT-S International

Conference_Location

Baltimore, MD

ISSN

0149-645X

Print_ISBN

978-1-61284-754-2

Electronic_ISBN

0149-645X

Type

conf

DOI

10.1109/MWSYM.2011.5972765

Filename

5972765