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:
Mar. 10, 2009
Filed:
Nov. 18, 2004
Kazunori Nishimura, Kyoto, JP;
Tsutomu Igaki, Hyogo, JP;
Ken Matsunami, Osaka, JP;
Hiroyuki Nakamura, Osaka, JP;
Kazunori Nishimura, Kyoto, JP;
Tsutomu Igaki, Hyogo, JP;
Ken Matsunami, Osaka, JP;
Hiroyuki Nakamura, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A SAW filter is configured by forming a first IDT and a second IDT on a piezoelectric substrate, and the first IDT is arranged between one terminal of input/output terminals and another terminal of the input/output terminals, i.e., serially in a signal path, and the second IDT is arranged in parallel to a signal path from a portion between one terminal of the input/output terminals and the first IDT. The first IDT and the second IDT are arranged in proximity to each other and on the same propagation path of surface acoustic waves which are excited by each of the resonators.