Effect of Static Reflector in Vital Sign Radar Sensing System

Non-contact short-range radar sensors can detect object movement based on the amplitude and phase readouts. Such systems are widely used in industries, but the medical sector is of special interest. In this work, a Doppler radar system based on six-port interferometric topology is presented to inves...

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Bibliographic Details
Published in:	2022 Asia-Pacific Microwave Conference (APMC) pp. 563 - 565
Main Authors:	Ye, Yijun, Cheong, Pedro, Choi, Wai-Wa
Format:	Conference Proceeding
Language:	English
Published:	The Institute of Electronics Information and Communication Engineers (IEICE) of Japan 29-11-2022
Subjects:	Distortion Industries Microwave circuits Modulation modulator radar Radar detection Radar signal processing Reflection reflector six-port interferometric circuit Vital signs
Online Access:	Get full text
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Summary:	Non-contact short-range radar sensors can detect object movement based on the amplitude and phase readouts. Such systems are widely used in industries, but the medical sector is of special interest. In this work, a Doppler radar system based on six-port interferometric topology is presented to investigate the effect of the reflection by the environment or static part of an object on the received signals from the desired modulator (i.e., a patient's chest). The experimental results show that the static reflector partially distorts the reflected signal of the modulator. In addition, the larger the area, the more significant the distortion is, laying a foundation for future research.
DOI:	10.23919/APMC55665.2022.10000031