Shane E Hunter

US Patent:

57810877, Jul 14, 1998

Filed:

Dec 27, 1995

Appl. No.:

8/580400

Inventors:

William W. Milroy - Playa del Rey CA
Shane H. Hunter - Huntington Beach CA

Assignee:

Raytheon Company - Lexington MA

International Classification:

H01P 106

US Classification:

333257

Abstract:

A rectangular waveguide rotary joint that allows limited mechanical rotation of two rectangular waveguides around a common longitudinal axis. The joint comprises a first rectangular waveguide having a first waveguide flange and a second rectangular waveguide having a second waveguide flange, wherein the second waveguide flange is disposed adjacent to the first waveguide flange with an air gap disposed therebetween. An RF choke is formed in the waveguide flanges for reducing RF leakage caused by the air gap, and a low friction spacer system for separating the first and second waveguides to maintain relative alignment of the waveguides during rotation and maintain a substantially constant separation between the waveguides. The waveguide rotary joint provides for a low voltage standing wave ratio (VSWR) and low insertion loss exhibited over a +/-30 degree rotation range.