Why the study?
To address the null detection point problem generated at quarter-wavelength distance between target and antenna and improve vital sign detection accuracy.
A concurrent dual-band CW Doppler radar system can accurately detect vital signs (respiration and heartbeat) while avoiding the null detection point problem, even through obstacles.
Dual-band CW Doppler radar extends non-contact vital sign detection options; leaves open clinical validation in cardiovascular populations.
In this paper, a concurrent dual-band hybrid down conversion architecture based on continuous-wave (CW) Doppler radar is demonstrated. The proposed system operates at 2.05-/1.64-GHz simultaneously. The dual-band can solve the null detection point problem generated at quarter-wavelength distance between the target and antenna. The detection results from different channels can be mutually verified to improve the system accuracy. The vital sign can be detected by the radar through the wooden board at higher transmit power. For satisfying the requirements of dual-band RF transmitters, and a two-stage dual-band power amplifier is designed. Experimental results have demonstrated the feasibility of the system.
No takes yet. Share an insight, caveat, or question.
Liu et al. (2019) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: