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:
May. 11, 2010
Filed:
Jan. 29, 2008
Applicant:
Xin Jiang, Chelmsford, MA (US);
Inventor:
Xin Jiang, Chelmsford, MA (US);
Assignee:
Hittite Microwave Corporation, Chelmsford, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01P 5/18 (2006.01); H01P 3/08 (2006.01);
U.S. Cl.
CPC ...
Abstract
An improved spiral coupler including a plurality of parallel, coextensive conductive strips disposed in a planar spiral path, including a first strip having an input port and a direct or through port, a second strip having a coupler port and an isolated port and a first cross-over connection for bridging the strips from the inside to the outside of the spiral path to provide all four the ports external access to the spiral path.