• Rev Sci Instrum · Oct 2007

    Measurement of human heartbeat and respiration signals using phase detection radar.

    • Hyoung Jong Kim, Ki Ho Kim, Yun Seok Hong, and Jin Joo Choi.
    • Department of Wireless Communications Engineering, Kwangwoon University, 447-1, Wolgye-Dong, Nowon-Gu, Seoul 139-701, Korea.
    • Rev Sci Instrum. 2007 Oct 1; 78 (10): 104703.

    AbstractThis article introduces a low-cost phase detection radar aimed at measuring the human heartbeat and respiration signals without any physical connections to the human body. A continuous-wave radar targeting the chest will detect the phase difference, resulted by the time-varying target position of the heartbeat, between the transmitted signal and the reflected signal. We have tested the developed radar to measure the heartbeat and respiration signals at a distance of about 40 cm from the chest.

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