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:
Feb. 20, 2007
Filed:
Nov. 22, 2004
Masanori Hongo, Osaka, JP;
Natsuyo Nagano, Osaka, JP;
Takashi Ogura, Kyoto, JP;
Hideki Ito, Osaka, JP;
Toshio Tanuma, Osaka, JP;
Masanori Hongo, Osaka, JP;
Natsuyo Nagano, Osaka, JP;
Takashi Ogura, Kyoto, JP;
Hideki Ito, Osaka, JP;
Toshio Tanuma, Osaka, JP;
Sanyo Electric Co., Ltd., Moriguchi, JP;
Abstract
The present invention provides an antenna duplexer comprising a package having a plurality of ceramic layers superposed, and a transmitting filter and a receiving filter which are mounted on a surface of the package. A phase-matching strip line is formed on a surface of one ceramic layer. The package has grounding layers formed respectively on surfaces of upper and lower ceramic layers with the phase-matching strip line interposed therebetween. A plurality of via holes are formed around the phase-matching strip line for connecting the two grounding layers to each other.