Key result
A novel six-port radar sensor operating at 24 GHz successfully tracked minor mechanical movements caused by respiration and heartbeat with high-distance measurement accuracy in the micrometer scale.
A novel 24 GHz six-port radar sensor demonstrates feasibility for remote, non-contact monitoring of respiration and heartbeat with high distance measurement accuracy.
Supports feasibility of remote vital sign monitoring; leaves open clinical validation before practice adoption.
A novel remote respiration and heartbeat monitoring sensor is presented. The device is a monostatic radar based on a six-port interferometer operating a continuous-wave signal at 24 GHz and a radiated power of less than 3 μW . Minor mechanical movements of the patient's body caused by the respiration as well as heartbeat can be tracked by analyzing the phase modulation of the backscattered signal by means of microwave interferometry with the six-port network. High-distance measurement accuracy in the micrometer scale as well as low system complexity are the benefits of the six-port receiver. To verify the performance of the system, different body areas have been observed by the six-port radar. The proposed system has been tested and validated by measurement results.
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Vinci et al. (2013) studied this question. Six-port radar sensor was evaluated on Respiration and heartbeat tracking performance. A novel six-port radar sensor operating at 24 GHz successfully tracked minor mechanical movements caused by respiration and heartbeat with high-distance measurement accuracy in the micrometer scale.
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