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:
Feb. 17, 2004
Filed:
Apr. 02, 2002
William R. Goyette, San Marcos, CA (US);
Karl D. Peterschmidt, Carlsbad, CA (US);
Trung H. Lam, San Diego, CA (US);
Northrop Grumman Corporation, Los Angeles, CA (US);
Abstract
A lumped element ring balun ( ) including elements patterned on a monolithic substrate ( ) in a compact design. The balun ( ) includes four inductors ( ) and a plurality of capacitors ( ) electrically coupled together to provide RF output signals that are 180° out of phase with each other. The inductors ( ) are symmetrically disposed in a rectangular area on the substrate ( ). A first pair of the inductors ( ) is positioned at one end of the rectangular area, and a second pair of the inductors ( ) is positioned at opposite end of the rectangular area. All of the capacitors are formed on the substrate ( ) in a central circuit area ( ) between the first pair of inductors ( ) and the second pair of inductors ( ). Inner ends ( ) are coupled to circuit elements in the circuit area ( ) by a metallized trace ( ) extending through an air bridge ( ).