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:
Dec. 13, 2011
Filed:
Mar. 11, 2008
Yasuhiro Hamada, Tokyo, JP;
Shuya Kishimoto, Tokyo, JP;
Kenichi Maruhashi, Tokyo, JP;
Masaharu Ito, Tokyo, JP;
Masahiro Tanomura, Tokyo, JP;
Naoyuki Orihashi, Tokyo, JP;
Yasuhiro Hamada, Tokyo, JP;
Shuya Kishimoto, Tokyo, JP;
Kenichi Maruhashi, Tokyo, JP;
Masaharu Ito, Tokyo, JP;
Masahiro Tanomura, Tokyo, JP;
Naoyuki Orihashi, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A balun circuit comprising first through third CPW lines becoming signal I/O ports, a first differential transmission line for linking the central conductor of the second CPW line and the ground conductor of the first CPW line and for linking the ground conductor of the second CPW line and the central conductor of the first CPW line, a second differential transmission line for linking the central conductors of the first and third CPW lines and for linking the ground conductors of the first and third CPW lines, and a joint for connecting at least two ground conductors of the first through third CPW lines. The differential transmission line has a first line formed in a dielectric layer on a substrate, a second line arranged in the underlying layer, and an underlying line at a fixed potential arranged between the substrate and the second line.