Narrow field electromagnetic sensor system and method

(-- 57) summary -- the method of detecting the characteristic of the electromagnetism sensor system of a narrow view and an object offers the function to realize density, thickness, or the characteristic of an object like existence, to the coordinates position of objective arbitrary requests. One application is imaging technology. A sensor can be used also as the interference detection machine or electronic trip which has a narrow view without the fault of the spoiled performance, when exposed to garbage, snow, rain, or sunlight. The transmitter with which a sensor transmits a series of electromagnetism signals according to a send timing signal, The signal processor which carries out the sample only of the RF course of the beginning of an electromagnetism signal directly, and processes the receiver from which other electromagnetism signals are simultaneously excepted altogether according to a receiving timing signal, and a sample direct RF course electromagnetism signal, and gives directions of the objective characteristic is used. Usually, an electromagnetism signal is short RF burst and the disturbance must offer the nearly perfect eclipse of a direct RF course. While the timing circuit has not sampled the electromagnetism signal of an indirect course by using flight time technology, a receiver is controlled to carry out the sample only of the RF course of the beginning of an electromagnetism signal directly. A sensor system can be arranged at the place where two or more electronic sensors are the same without needing frequency assignment, while having also incorporated the super-broadband spectrum expansion operation circuit which attains to other RF services and decreases the interference from other RF services.