Method of measuring orientation or dielectric characteristic of

Details Method of measuring orientation or dielectric characteristic of Method of measuring orientation or dielectric characteristic of

1985-09-18

1987-12-01

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

73159, 324 585R, G01R 2704, G01B 516

Patent

active

047107006

ABSTRACT:
A method of measuring the orientation or dielectric characteristic of a dielectric sheet or web is disclosed, with the steps of inserting a sample portion of the dielectric sheet or web in a small clearance in a cavity resonator formed of a pair of waveguides respectively having a transmitting antenna and a receiving antenna, said waveguides being spaced apart from each other with their openings defining said clearance therebetween, irradiating said sample portion with frequency sweep type linearly polarized microwaves from the upper waveguide perpendicularly to said sample portion while producing a relative rotational motion between the plane of polarization of microwaves and said sample portion around the axis of said cavity resonator, and measuring the resonance frequency or Q value of the microwaves received by the lower waveguide.

REFERENCES:
patent: 4087746 (1978-05-01), Kanae
patent: 4297874 (1981-11-01), Sasaki
patent: 4581575 (1986-04-01), Osaki
Tiuri: "Microwave Method for Measurement of Fiber Orientation . . . ", 4th European Microwave Conference-pp. 137-140.
Tappi Standard T481 SM-60, Suggested Method-1952, Revised-1960, "Fiber Orientation and Squareness of Paper".

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