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:
Jul. 22, 2025
Filed:
Jun. 22, 2021
Kyocera Corporation, Kyoto, JP;
Naofumi Kasamatsu, Nara, JP;
KYOCERA Corporation, Kyoto, JP;
Abstract
An acoustic wave resonator includes a piezoelectric body and electrode fingers. The electrode fingers are positioned on the piezoelectric body and arrayed in a propagation direction of acoustic waves. The electrode fingers include a first and second electrode finger groups. Electrode fingers are formed between adjacent two of the electrode fingers of the other electrode group. A duty ratio of the electrode fingers of the first and second electrode finger groups is gradually changed along one of opposite directions specifying the propagation direction by first and second change amounts, respectively which are different, and in the opposite direction. In a region in which the electrode fingers are positioned, a pitch between the electrode fingers is changed to cancel an effect of a difference in the duty ratio of the electrode fingers on a difference in resonance frequency.