This research describes both a touch-free heartbeat detection system and a cardiopulmonary signal modeling
technique. A vector network analyzer is used to test a microwave system for detection of a heartbeat signal at a distance of 1 m
from a person. The developed system can detect heartbeat signals and adjust their frequency and strength. Measurements are
taken at 2.4, 5.8, 10, 16, and 60 GHz, as well as at power levels ranging from 0 to -27 dBm. Based on data for both breathing and
heartbeats, a model of the recorded signals reflecting cardiopulmonary activity is provided. The heartbeat rate and variability are
obtained from the modeling signal using wavelet and classic filters. 0and-20dB
