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The "Life Detection System: Based on the L and S Microwave Bands" is a revolutionary new built-in system for detecting humans buried under debris from earthquakes or debris. "Thousands of people killed as the cause of the earthquake." The above words are not the headlines of the newspaper, but daily news from around the world are crossed every time we go through a newspaper or watching a television news. With meteoric embedded systems along with microprocessor that prevents deaths and provides safe guided measurements. With the advent of this system, the world mortality rate may decrease to a greater extent, since a large percentage of death occurs due to the earthquake. The advantages of microwave signals are fully utilised in this system. L and S band microwaves are used here to detect the living body.

A new sensitive microwave life detection has been constructed that can be used to locate human subjects buried in earthquake debris or hidden behind several barriers. This system operating at 1150 MHz or 450 MHz can detect the breathing and heartbeat signals of humans through an earthquake debris or a building barrier approximately 10 feet thick. The basic physical principle for the operation of a microwave life detection system is quite simple. When a microwave of appropriate frequency (L or S band) is directed to a heap of earthquake debris covering a human subject or illuminating through a barrier obstructing a human subject, the microwave beam may penetrate into The debris or the barrier to reach the human subject. When the human subject is illuminated by a microwave beam, the reflected wave of the human subject will be modulated by the subject's body movements, which include breathing and heartbeat. If the disorder consisting of the reflected wave from the stationary background can be completely removed and the reflected wave of the human subject's body is properly modulated, the breathing and heartbeat signals from the subject can be extracted. Therefore, a human subject buried under earthquake debris or hidden behind barriers can be located. This system has been extensively tested in a simulated earthquake debris in the laboratory and also in a field test using realistic earthquake debris conducted by a Federal Emergency Management Agency (FEMA) Task Force.