Patent ID: 6919838

Claim:
A method of scanning an object, the method comprising the steps of: providing at least two ultra-wideband pulse emitters, and a receiver; substantially eliminating an ultra-wideband pulse multi-path interference by sequentially emitting at least two ultra-wideband pulses toward the object; receiving the ultra-wideband pulses; determining a time differential between a portion of the ultra-wideband pulses that did not pass through the object, and a portion of the ultra-wideband pulses that passed through the object; determining a density of the object based on the a time differential between the portion of the ultra-wideband pulses that did not pass through the object, and the portion of the ultra-wideband pulses that passed through the object; and determining a material characteristic of the object based on the density of the object; wherein the material characteristic is selected from a group consisting of: a material density, a material composition, a material type and a material shape.