Patent ID: 6859046
Filing Date: 2005-02-22
Classification: G01N

Abstract:
1. An apparatus for evaluating dielectrically-anisotropic materials comprising: at least two microwave transmitters, said microwave transmitters having at least three planes of polarization, each transmitter of said microwave transmitters for transmitting a microwave beam of the same frequency, where there is no specific attempt to achieve a rotating plane polarized microwave beam through phase synchronization of the transmitted beam, and at least two microwave receivers having at least three planes of polarization, wherein maid each transmitter of said microwave transmitters includes a means of modulating the microwave beam to be transmitted, wherein said microwave transmitters and said microwave receivers are arranged, relative to a workplace to be measured so as to cooperate in microwave communication therebetween and so as to irradiate the workpiece with the transmitted microwave beam, and wherein connected to each receiver of said microwave receivers is a means to identify the received amplitude and phase of a component of said transmitted microwave beam, and wherein connected to said each receiver is a means for analyzing by Fourier analysis received signals of said transmitted microwave beam to identify principal axes, attenuations and phase shifts of said received signals.