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:
Jun. 07, 2005
Filed:
Sep. 24, 2003
Tatsunori Hashimoto, Yokohama, JP;
Fumihiko Aiga, Yokohama, JP;
Hiroyuki Fuke, Kawasaki, JP;
Yoshiaki Terashima, Yokosuka, JP;
Mutsuki Yamazaki, Yokohama, JP;
Hiroyuki Kayano, Fujisawa, JP;
Tatsunori Hashimoto, Yokohama, JP;
Fumihiko Aiga, Yokohama, JP;
Hiroyuki Fuke, Kawasaki, JP;
Yoshiaki Terashima, Yokosuka, JP;
Mutsuki Yamazaki, Yokohama, JP;
Hiroyuki Kayano, Fujisawa, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A band pass filter configured by a planar structure circuit, includes resonators of distribution constant circuit type, transmission line paths coupling the resonators and excitation lines arranged at input/output sides. The transmission line path is provided with line path portions coupling the resonators or the resonator and the excitation line. The line path portion have a length which is (1+2m)/4-fold (m: natural number) of a wavelength corresponding to a center frequency of the frequency band, and each coupling part between the resonators and the line portion has a length substantially determined as a ¼ wavelength.