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:
Nov. 19, 1991
Filed:
Oct. 22, 1990
Alfred W Morse, Ellicott City, MD (US);
Westinghous Electric Corp., Pittsburgh, PA (US);
Abstract
In one embodiment a diode phase shifter has a four port coupler formed of a pair of RF coupled transmission lines. The coupler has an input port on one transmission line and an output port on the other, and each transmission line has a tunable port. Serially interconnected RF isolated gateable diodes are provided, one diode is coupled to the tunable port on one transmission line and the other diode is connected to the other tunable port. The diodes approximate a microwave open circuit when reverse biased and approximate a microwave short circuit when forward biased to a conducting state. In another embodiment a diode phase shifter employing a single stripline is described.