Accession Number : ADD014694

Title :   Apparatus for Determining Microwave Characteristics of Superconductive Materials Using a Resonant Cavity and Calibration Waveguides.

Descriptive Note : Patent, Filed 3 Aug 89, patented 25 Sep 90,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Bowling, Donald R ; Smith, Charles F

Report Date : 25 Sep 1990

Pagination or Media Count : 13

Abstract : Apparatus for determining the electrical characteristics of a superconductive material in a range of microwave frequencies and in a range of cryogenic temperatures has the material incorporated within a resonant cavity mounted on a a cold finger for maintaining the material at a predetermined temperature. A pair of test waveguides extended oppositely of the cavity and terminate in separable waveguide junctions for passage of microwave energy to measure the microwave characteristics of the cavity as affected by the enclosed in a vacuum chamber from which the cold finger extends for connection to controlled temperature cryogenic cooling equipment. The chamber also contains a plurality of calibration waveguides which extend parallel to the test waveguides, each calibration waveguide terminating oppositely in separable junctions. The chamber has plates disposed oppositely of the waveguides and movable transversely in relation to the waveguides without loss of vacuum. Keywords: Patents. (R.H.)

Descriptors :   *CAVITIES, *CRYOGENICS, *ELECTRICAL PROPERTIES, *PATENTS, *RESONANCE, *SUPERCONDUCTIVITY, *WAVEGUIDES, CALIBRATION, ENERGY, FINGERS, JUNCTIONS, LOSSES, LOW TEMPERATURE, MATERIALS, MEASUREMENT, MICROWAVE FREQUENCY, MICROWAVES, SEPARATION, TEST AND EVALUATION, VACUUM, VACUUM CHAMBERS

Subject Categories : Test Facilities, Equipment and Methods
      Electrical and Electronic Equipment
      Solid State Physics
      Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE