Patent ID: 6501414
Filing Date: 2002-12-31
Classification: F41H,G01S,G01V

Abstract:
A method of detecting anomalies in a microwave penetrable material, comprising:transmitting a microwave signal that is stepped over a plurality of frequencies, said microwave signal being transmitted at each of a plurality of positions in said microwave penetrable material; receiving a plurality of reflections for said plurality of frequencies at each of said plurality of positions, each of said plurality of reflections having a magnitude and a phase and a time delay; producing a complex target data vector from said plurality of reflections at each of said plurality of positions; producing a complex reference data vector which is representative of an anticipated complex target data vector of said microwave penetrable material when said anomalies to be detected are not present within said microwave penetrable material; comparing said complex target data vector with said complex reference data vector for producing a response signal at each of said plurality of positions; and detecting said anomalies in said microwave penetrable material from changes in said response signal for each of said plurality of positions.