Apparatus for measuring electromagnetic characteristics of a ver

Details Apparatus for measuring electromagnetic characteristics of a ver Apparatus for measuring electromagnetic characteristics of a ver

1990-05-18

1991-08-13

Wieder, Kenneth A.

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Distributive type parameters

333248, G01R 2704, H01P 100

Patent

active

050399489

ABSTRACT:
The apparatus comprises a waveguide having one end with an outside rim in the form of a test flange having a plane front surface defining a calibration plane and intended to be applied against a plane surface of a sample of material to be tested, a generator coupled to the waveguide to inject microwaves therein, and means for detecting the waves reflected by the material. At least the terminal portion of the waveguide including the test flange for application against the material to be tested at very high temperature is made of an electrically conductive refractory composite material, such as a carbon/carbon or a carbon/ceramic composite material.

REFERENCES:
patent: 3025463 (1962-03-01), Luoma et al.
patent: 3233172 (1966-02-01), Luoma
patent: 3939415 (1976-02-01), Terasawa
patent: 4287495 (1981-09-01), Lund, Jr. et al.
patent: 4704576 (1987-11-01), Tributsch et al.
patent: 4949034 (1980-08-01), Imura et al.

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