Moisture detector apparatus and method
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United States of America Patent
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-
Dec 29, 1987
Grant Date -
N/A
app pub date -
Aug 16, 1985
filing date -
Aug 16, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An apparatus and method for providing improved measurement of moisture in a sample cell by use of microwave energy. Improved accuracy and reliability of the moisture determination is obtained by causing solely parallel beam, planar wavefront microwave energy to be passed through the sample in the test cell. The apparatus includes transmitting and receiving antennas and refractor elements (lenses) interposed between the antennas and the sample cell. The antennas, refractor elements, and sample cell may be located within an anechoic chamber. The invention comprehends locating the sample cell in the near field of the transmitting antenna and coordinating the characteristics of the refractor elements with the spacing of the antennas relative to the sample cell.
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