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:
Apr. 02, 2002
Filed:
May. 26, 1998
Masahiro Hiraka, Ikoma, JP;
Hidenori Katsumura, Kobe, JP;
Ryuichi Saito, Kadoma, JP;
Hiroshi Kushitani, Izumisano, JP;
Naoki Yuda, Hirakata, JP;
Shigeo Hurukawa, Osaka, JP;
Suzushi Kimura, Toyonaka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A diplexer employed in mobile communications equipment such mobile phones which can divide signals into two channels with a simple configuration without interfering the other band. In this diplexer, an inductor is connected between a &pgr;-type three-stage one polar low-pass filter and a common terminal as a first matching circuit, and a capacitor A is connected between a one polar band-pass filter and a common terminal as a second matching circuit so that interference with the other band can be prevented and the higher harmonics can be sufficiently attenuated with simple configuration.