Dielectric constant measurement probe assembly and apparatus and

Details Dielectric constant measurement probe assembly and apparatus and Dielectric constant measurement probe assembly and apparatus and

1990-10-03

1992-10-20

Harvey, Jack B.

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Distributive type parameters

324633, 324675, 324687, G01R 2726

Patent

active

051573377

ABSTRACT:
A dielectric constant measurement probe assembly includes a coaxial cable ving a outer electrical conductor and a center electrical conductor extending within the outer conductor and terminating at an end portion which projects beyond an end portion of the outer conductor. An adapter member has a central passage receiving the coaxial cable with the outer conductor of the cable extending through the passage of the adapter member and projecting therefrom. An outer tube has a bore composed of first and second axial sections. The second bore section is smaller in diameter than the first bore section. The adapter member is inserted in the first bore section with the end portion of the coaxial cable outer conductor inserted into the second bore section and making electrical contact therewith such that the outer tube thus constitutes an extension of the outer conductor. A resonant rod is coupled with the end portion of the center conductor of the coaxial cable and an annular sleeve supports the resonant rod in the second bore section of the outer tube such that the rod constitutes an extension of the center conductor. The resonant rod and outer tube together define an open end of the coaxial cable such that the rod being capable of acting as a resonant structure upon energizing the coaxial cable produces fringing fields that protrude from the open end and penetrate a test sample disposed adjacent thereto.

REFERENCES:
patent: 2439527 (1948-04-01), Paulson
patent: 2527979 (1950-10-01), Woodward, Jr.
patent: 2849691 (1958-08-01), De Tar
patent: 3400331 (1968-09-01), Harris
patent: 3778706 (1973-12-01), Thompson

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