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. 24, 2009
Filed:
Feb. 17, 2005
Hiroyuki Ishiwata, Fukushima-ken, JP;
Takashi Tanemura, Fukushima-ken, JP;
Akiyuki Yoshisato, Fukushima-ken, JP;
Masami Miyazaki, Fukushima-ken, JP;
Hiroyuki Ishiwata, Fukushima-ken, JP;
Takashi Tanemura, Fukushima-ken, JP;
Akiyuki Yoshisato, Fukushima-ken, JP;
Masami Miyazaki, Fukushima-ken, JP;
Alps Electric Co., Ltd., Tokyo, JP;
Abstract
A diplexer contains a common terminal connected to an antenna, a first input/output terminal for inputting/outputting signals of a plurality of high frequency bands higher than a predetermined frequency, and a second input/output terminal for inputting/outputting signals of low frequency bands lower than the predetermined frequency. Between the common terminal and the first input/output terminal, a high pass filter and low trap circuits for attenuating the low frequency bands respectively are interposed in series, and, between the common terminal and the second input/output terminal, a low pass filter and high trap circuits for attenuating the high frequency bands respectively are interposed in series.