Open cryogenic microwave test chamber

US5052183A · kind A · utility

Assignee

• The United States of America as represented by the Secretary of the Army · US

Inventors

• Thomas E. Koscica · Clark, US
• Richard W. Babbitt · Fair Haven, US
• William C. Drach · Trenton, US

Key dates

• Filing date: Jan 4, 1991
• Grant date: Oct 1, 1991
• Expiry date: Jan 4, 2011

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S505/891
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A cryogenic microwave test chamber consists of a dry-sample receiving char which is partly immersed in liquid nitrogen. Waveguides from either end of the interior of the dry chamber are connected to and sealed to outgoing waveguides in regions immersed in the liquid nitrogen. Dry nitrogen is introduced through the waveguide and is circulated through the dry chamber to prevent condensation therein during cooling. A heat conductive metal tube surrounds the dry chamber and is spaced therefrom and acts as a heat barrier. Waveguide flanges on the opposite ends of the dry chamber slidably seal the chamber.