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. 19, 2015
Filed:
Jul. 30, 2009
Applicants:
Takeshi Takenoshita, Kyoto, JP;
Yuuko Yokota, Kyoto, JP;
Yuuji Mori, Kyoto, JP;
Inventors:
Assignee:
KYOCERA Corporation, Kyoto, JP;
Primary Examiner:
Int. Cl.
CPC ...
H03H 9/58 (2006.01); H03H 9/05 (2006.01); H03H 9/72 (2006.01); H03H 7/42 (2006.01); H03H 1/00 (2006.01);
U.S. Cl.
CPC ...
H03H 9/0576 (2013.01); H03H 9/725 (2013.01); H03H 2001/0085 (2013.01);
Abstract
A duplexer has an antenna terminal, a first terminal, and second terminals and provided with a first filter arranged between the antenna terminal and first terminal and including a parallel resonator for forming a ladder type filter circuit, a second filter arranged between the antenna terminal and the second terminal and having a passband higher than a passband of the first filter, and an electromagnetic coupling element arranged between the parallel resonator of the first filter and a ground part and electromagnetically coupled with the antenna terminal.