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:
Nov. 17, 2015
Filed:
Mar. 08, 2012
Tadaaki Tsuda, Sayama, JP;
Tadaaki Tsuda, Sayama, JP;
Nihon Dempa Kogyo Co., Ltd., Tokyo, JP;
Abstract
There is provided a tapered elastic wave filter higher in impedance than a conventional filter where one input-side IDT electrode and one output-side IDT electrode are disposed. Filter parts which are the same in the structure of an input-side IDT electrode and in the structure of an output-side IDT electrode are disposed, and when the first filter part is disposed on a lower side and the second filter part is disposed on an upper side of the first filter part so that the input-side IDT electrodes are connected and the output-side IDT electrodes are connected, in cascade (in series) between a signal port and a ground port, an upper busbar in each of the IDT electrodes of the first filter part and a lower busbar in each of the IDT electrodes of the second filter part are electrically connected to each other.