A remote compact sensor system for the detection of human vital signs
(heartbeat and respiration rate) is presented. The frequency band of 24 GHz is
employed for remote sensing. For the compact size, the developed sensor
uses a circularly polarized electromagnetic wave with a single antenna.
The sensor system is composed of radio-frequency circuits, a signal
conditioning block, a data-acquisition unit, and a signal-processing part. The
peak detection of the power spectral density with a tracking algorithm is
utilized for the real-time detection of human vital signs.
The measurement result is compared with the commercial fingertip sensor.
The comparison result shows excellent agreement.
