Measurement apparatus and method utilizing multiple resonant mod

Details Measurement apparatus and method utilizing multiple resonant mod Measurement apparatus and method utilizing multiple resonant mod

1988-12-09

1990-02-27

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Distributive type parameters

G01N 2200

Patent

active

049049283

ABSTRACT:
Measurement apparatus and method utilizing microwave energy. A symmetric microwave cavity is excited to oscillate in at least two identical resonant modes having substantially the same resonant frequencies but different field orientations relative to each other. A sample to be measured is caused to interact with the identical resonant modes and the difference in the frequencies of oscillation of the modes is determined in order to measure a property of the sample.

REFERENCES:
patent: 3458808 (1969-07-01), Agdur
Tiuri and Liimatainen, "A Microwave Method for Measurement of Fiber Orientation in Paper," Journal of Microwave Power, 10(2), 1975, pp. 141-145.
Bosisio et al., "The Regenerative . . . (RDT) . . . ," Conference; fourth European Microwave Conference; Montreux, Switzerland (10-13 Sep. 1974).
Joglekar et al., "A Rectangular Waveguide Orthomode Transducer;" Int. J. Electronics, vol. 47, No. 5, pp. 525-527, Nov. 1979.

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