Patent ID: 7187183

Claim:
An apparatus for measuring at least one physical parameter of an object by means of transmitting microwaves towards the object and analyzing microwaves that have passed through the object, said apparatus comprising: source for generating time dependent electrical signals, a transmitter positioned in proximity to the object for converting the time dependent electrical signals to microwaves and transmitting the microwaves towards the object, a polarizer positioned adjacent to the object and opposite to the transmitter for rotating at least part of the polarization of the waves transmitted through the object and reflecting a predetermined polarity of the transmitted waves, a receiver positioned opposite to the object with respect to the polarizer for receiving the reflected microwaves of predetermined polarity that have passed through the object twice and converting them into an electrical signal, wherein said transmitter and said receiver are orthogonally polarized with respect to each other, a computer system for utilizing the electrical signal for calculating the at least one physical parameter of the object.