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, 2005
Filed:
Nov. 06, 2002
Applicants:
Kazuhide Uriu, Katano, JP;
Toru Yamada, Katano, JP;
Toshio Ishizaki, Kobe, JP;
Inventors:
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B001/44 ;
U.S. Cl.
CPC ...
Abstract
A diplexer capable of passing signals of a high frequency band without being attenuated over a wide frequency band, and a high-frequency switch using the diplexer are provided. The diplexer includes a low-pass filterhaving a parallel resonant circuit formed by a first capacitor Cand a first inductor Land a serial resonant circuit formed by a second capacitor Cand a second inductor LWith this structure, two attenuation poles are provided in the low-pass filterThus, a passband of a high-pass filtercan be widened.