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:
Mar. 12, 2002
Filed:
Aug. 26, 1999
Gary S. Goldsmith, Kirkland, WA (US);
Donn Harvey, Issaquah, WA (US);
Sheldon K. Meredith, Duvall, WA (US);
Thomas Shafer, Seattle, WA (US);
Metawave Communications Corporation, Redmond, WA (US);
Abstract
The present invention provides systems and methods for phase shifting signals wherein the phase shifting circuitry may be disposed in a relatively small footprint. The preferred embodiment utilizes PIN diodes to provide switched line phase shifting, wherein the switched lines are microstrip and/or stripline transmission lines of predetermined lengths. To minimize the space required, the switched lines of the preferred embodiment are disposed on different layers of a multi-layered support structure, such as a multi-layer circuit board. Layer changing vias are preferably adapted to provide a constant impedance to thereby make changes in layers in the transmission path electrically transparent to a transmitted signal.