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. 27, 2007
Filed:
Jul. 06, 2001
Kenichi Maruhashi, Tokyo, JP;
Masaharu Ito, Tokyo, JP;
Keiichi Ohata, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
The present invention provides a filter exhibiting excellent filter characteristics and having less number of stages. A dielectric substrate () has one surface connected to a top conductor () and an opposite surface connected to a bottom conductor (). A pair of rows of via-holes connecting together the top conductor () and the bottom conductor () are formed along the signal transfer direction. A slit () is formed in a portion of the top conductor () overlying the central resonator among a plurality of resonators. The slit () extends in a direction perpendicular to the signal transfer direction. Slits () are formed in each of portions of the top conductor () overlying resonators disposed at both ends. A coplanar waveguide () mounted on the top conductor () is connected to the slit ().