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:
Jan. 05, 2016
Filed:
May. 05, 2009
Applicants:
Keiichi Umeda, Nonoi, JP;
Kenichi Uesaka, Ishikawa-gun, JP;
Takashi Miyake, Hakusan, JP;
Inventors:
Assignee:
MURATA MANUFACTURING CO., LTD., Kyoto, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03H 9/54 (2006.01); H03H 9/72 (2006.01); H03H 9/70 (2006.01); H03H 9/00 (2006.01); H03H 9/64 (2006.01);
U.S. Cl.
CPC ...
H03H 9/706 (2013.01); H03H 9/0028 (2013.01); H03H 9/725 (2013.01);
Abstract
A duplexer includes a transmitting filter including serial resonators and parallel resonators connected in a ladder configuration, and a receiving filter. A resonator of the serial resonators and the parallel resonators in the transmitting filter that is arranged closest to a common terminal of the transmitting filter and the transmitting filter includes a surface acoustic wave resonator, and at least one resonator excluding the resonator that is arranged closest to the common terminal includes a film bulk acoustic wave resonator.