• KEDAR NATH SAHU

Abstract—Detection of the respiration rate and/or heartbeat rate are very important for both radar based lie-detection and life-detection. In the existing literature, it is observed that detection of heartbeat signals is done by using some microwave setup and experimental results about respiration and heartbeat rate have been obtained. Also the microwave heart signal has been mathematically modeled from a signal processing point of view or simulated in a general sense without considering electromagnetic properties of body tissues like bone, flesh, skeleton etc. surrounding the heart. In this paper, electromagnetic modeling of human body is presented and some theoretically estimated results for heart reflection coefficient, sensitivity and dynamic range of radar system using the microwave radiation from an ultra-wideband frequency-modulated continuous-wave (UWB FMCW) radar with frequency sweep from 1-11 GHz located at a distance of one meter away from the subject are presented. This estimation shall be useful in the design of a radar system for heartbeat detection related applications like lie detection, life detection of human being buried under the debris of earthquake rubble and see-through-the-wall (STTW) search operations.

Lie-detection, Life-detection, Polygraph, Reflection coefficient, Radar sensitivity, Power budget, Dynamic range.

"Electromagnetic Response of Human Being behind a Wall Barrier ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 2, page no.988-996, February-2018, Available :http://www.jetir.org/papers/JETIR1802176.pdf

"Electromagnetic Response of Human Being behind a Wall Barrier ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 2, page no. pp988-996, February-2018, Available at : http://www.jetir.org/papers/JETIR1802176.pdf