Conclusion

The study, primarily aimed at investigating the possibility of using UWB principle to probe a human body, clearly indicates that the variation of transmission coefficient follows the dimensional variation of a pulsating heart at all instants of a cardiac cycle. This feature can be utilized to develop an alternate non-invasive method of human heartbeat detection using UWB radar principles. Further, the results show that the transmission coefficients at all frequencies are in the order of 50-60 dB, which indicate the possibility of using measurement of transmission coefficient as one of the methods for the detection of live human being under inaccessible conditions.
In this work, the waves incident on and refracted from the layers are assumed to be plane waves. In order to improve the modeling, the plane wavefront may be replaced with the actual wavefront profile. In addition, the highly inhomogeneous nature of the tissues associated with the human thorax with respect to permittivity has to be accounted for.