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:
Aug. 11, 2009
Filed:
Aug. 08, 2006
Tokihiro Nishihara, Kawasaki, JP;
Shogo Inoue, Kawasaki, JP;
Takashi Matsuda, Kawasaki, JP;
Masanori Ueda, Kawasaki, JP;
Masafumi Iwaki, Kawasaki, JP;
Shinji Taniguchi, Kawasaki, JP;
Go Endo, Yokohama, JP;
Tokihiro Nishihara, Kawasaki, JP;
Shogo Inoue, Kawasaki, JP;
Takashi Matsuda, Kawasaki, JP;
Masanori Ueda, Kawasaki, JP;
Masafumi Iwaki, Kawasaki, JP;
Shinji Taniguchi, Kawasaki, JP;
Go Endo, Yokohama, JP;
Fujitsu Media Devices Limited, Yokohama, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A duplexer includes an antenna terminal, a first filter connected to the antenna terminal, and a second filter connected to the antenna terminal. At least one of the first filter and the second filter is a ladder type filter in which a parallel resonator and multiple series resonators are included, one or more first inductors are respectively connected in parallel with one or more series resonators out of the multiple series resonators, and one of the one or more first inductors is connected in parallel with one of the multiple series resonators that is arranged closest to the antenna terminal.