Method and apparatus to evaluate dielectrically-anisotropic materials using analysis of multiple microwave signals in different planes of polarization
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United States of America Patent
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Jan 11, 2005
Grant Date -
Dec 4, 2003
app pub date -
May 31, 2002
filing date -
May 31, 2002
priority date (Note) -
Expired
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Abstract
An apparatus for evaluating dielectrically-artisotropic materials comprising a plurality of microwave transmitters with more than two planes of polarization, and a plurality of microwave receivers with differing planes of polarization, wherein each transmitter includes a modulator modulating the transmitted microwave beam, the transmitters and receivers arranged, relative to a workpiece to be measured, so as to cooperate in communication therebetween, and wherein connected to each receiver is a device to identify the received amplitude and phase of a component of the transmitted microwave beam, and wherein connected to each receiver is a processor for analyzing the received signals to take more than two measurements including measuring the principal axes, attenuations and phase shifts of the received microwave beam.
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