The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 20, 2005
Filed:
Nov. 13, 2003
Barry Ross Allen, Rolling Hills Estates, CA (US);
Daniel Kwok-hung Ko, Arcadia, CA (US);
David Joseph Brunone, Rancho Palos Verdes, CA (US);
Barry Ross Allen, Rolling Hills Estates, CA (US);
Daniel Kwok-hung Ko, Arcadia, CA (US);
David Joseph Brunone, Rancho Palos Verdes, CA (US);
Northrup Grumman Corporation, Los Angeles, CA (US);
Abstract
A low loss suspended substrate coupler includes a substrate having a first transmission line disposed on a topside of the substrate and a second transmission line disposed on the bottom side of the substrate, thereby providing broadside transmission line coupling. To provide closer mode velocity matching, the coupler has capacitive loading or coupling to ground at discrete intervals between the two transmission lines. The capacitive loading is formed by integrating stubs in each transmission line at pre-determined intervals, each of which is opposite a corresponding one of a plurality of ground stubs on the other side of the substrate. The ground stubs are connected to ground at the outer edge of the coupler area with substrate vias or directly to the coupler housing.