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Noninvasive Biosignal Detection Radar System Using Circular Polarization

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4 Author(s)
Jee-Hoon Lee ; Korea Adv. Inst. of Sci. & Technol. (KAIST), Daejeon ; Jung Man Hwang ; Dong Hyuk Choi ; Seong-Ook Park

This paper proposes an integrated hypersensitive Doppler radar system through a circular polarization characteristic. Through the idea of a reverse sense of rotation when the reflecting surface is perfectly conducting, it is shown that the detecting property of the system can be effectively improved by using antennas that have a reverse polarization. This bistatic radar system can be used in noninvasively sensing biosignals such as respiration and heart rates with the periodic movement of skin and muscle near the heart. The operating frequency of the system is in the X-band and the radar size is 95 times 50 times 13 mm3.

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Information Technology in Biomedicine, IEEE Transactions on  (Volume:13 ,  Issue: 3 )