Study on Microwave Life Detection System

Abstract

Thousand of persons are being killed as a cause of earthquake. The disaster in the Dhaka City may claim thousands of lives due to Earthquake. It is said if survivors are found and rescued earlier the numbers of victims will be lower. There is no end to the number of lives lost as the result of such disasters as landslides, collapsed tunnels and avalanches. The microwave life detection system is developed for the search and rescue of victims trapped under the rubble of collapsed building during the earthquake or other disasters. TheproposedsystemutilizesL-bandfrequencywhichisabletodetectrespiratoryandheart fluctuations. TheoperationprincipleisbasedonDopplerfrequencyshiftoftheelectromagnetic wave reflected from the buried victim. The schematic diagram of microwave Transmitting/Receiving (T/R) and clutter cancellation subsystem are included in this report. In this report various parts of a microwave life detection system such as antenna, directional coupler, and splitter has been discussed. By advent of this system the world death rate as a cause of an earthquake may decrease to greater extent.