Apparatus for determining microwave characteristics of superconductive materials using a resonant cavity and calibration waveguides

Patent · Tue Sep 25 04:00:00 EDT 1990

OSTI ID:6327131

Bowling, D R; Smith, C F

This patent describes an apparatus for determining microwave characteristics of a superconductive material having a transition temperature. It comprises: an element constructed of the superconductive material; a body defining a resonant cavity for microwave energy and having means for mounting the element at the cavity for impingement by the energy; a test waveguide extending from the body and terminating in a test waveguide junction; a calibration waveguide extending along the test waveguide and terminating in a calibration waveguide junction; a wall defining a vacuum chamber enclosing the body, the test waveguide, and the calibration waveguide; a cold finger extending from the body through the wall to conduct heat from the body and maintain the element at a temperature in a range of temperatures including the transition temperature; a connecting waveguide terminating at one end in a connecting microwave junction and having an opposite end connectable to microwave analyzer equipment; and means for mounting the connecting waveguide on the wall with vacuum sealed movement relative to the wall.

• Assignee: Secretary of the Navy, Washington, DC (USA)
• Patent Number(s): A; US 4959614
• Application Number: PPN: US s 7-389233
• OSTI ID: 6327131
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
426001* -- Engineering-- Superconducting Devices & Circuits-- (1990-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CAVITY RESONATORS
ELECTROMAGNETIC RADIATION
ELECTRONIC EQUIPMENT
EQUIPMENT
MEASURING METHODS
MICROWAVE RADIATION
PHYSICAL PROPERTIES
RADIATIONS
RESONATORS
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
WAVEGUIDES