Joseph S Rowan

US Patent:

47852682, Nov 15, 1988

Filed:

Jul 30, 1987

Appl. No.:

7/079686

Inventors:

Jeffrey A. Walter - Wilmington DE
Kailash C. Garg - Newark DE
Joseph C. Rowan - Wilmington DE
Robert H. Gibson - Elkton MD

Assignee:

W. L Gore & Associates, Inc. - Newark DE

International Classification:

H01P 900
H01P 902

US Classification:

333157

Abstract:

A delay line is provided for effecting a desired delay in the transmission of electromagnetic waves in the microwave and millimeter range of the spectrum. The line comprises a length L of a dielectric waveguide for transmission of electromagnetic waves comprising a core of polytetrafluoroethylene having one or more layers of polytetrafluoroethylene overwrapped around the core, wherein T=KL/c, in which T is the total time delay , c is the velocity of light in free space and K is the delay constant of the dielectric waveguide. Preferably, the delay line is overwrapped around a mandrel.

US Patent:

47927747, Dec 20, 1988

Filed:

Sep 29, 1987

Appl. No.:

7/101987

Inventors:

Jeffrey A. Walter - Wilmington DE
Kailash C. Garg - Newark DE
Joseph C. Rowan - Wilmington DE

Assignee:

W. L. Gore & Associates, Inc. - Newark DE

International Classification:

H01P 1162

US Classification:

333251

Abstract:

A dielectric waveguide for the transmission of electromagnetic waves is provided comprising a core of polytetrafluoroethylene (PTFE), one or more layers of PTFE cladding overwrapped around the core, the core and/or cladding having mode suppression filters of an electromagnetically glossy material embedded therein, and an electromagnetic shielding layer covering the cladding. The mode suppression filters are preferably mica cards.

US Patent:

48750263, Oct 17, 1989

Filed:

Aug 17, 1987

Appl. No.:

7/086403

Inventors:

Jeffrey A. Walter - Wilmington DE
Kailash C. Garg - Newark DE
Joseph C. Rowan - Wilmington DE

Assignee:

W. L. Gore & Associates, Inc. - Newark DE

International Classification:

H01P 1162

US Classification:

333251

Abstract:

A dielectric waveguide for the transmission of electromagnetic waves is provided comprising a core of polytetrafluoroethylene (PTFE), one or more layers of PTFE cladding overwrapped around the core, a mode suppression layer of an electromagnetically lossy material covering the cladding and an electromagnetic shielding layer covering the mode suppression layer. The mode suppression layer is preferably a tape of carbon-filled PTFE. Another electromagnetically lossy material layer may be placed around the shield to absorb any extraneous energy.