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:
Aug. 11, 1998
Filed:
Apr. 22, 1997
Michio Kadota, Nagaokakyo, JP;
Kazuhiko Morozumi, Nagaokakyo, JP;
Abstract
An end face reflection type surface wave resonator utilizing SH type surface waves capable of providing a plurality of resonance characteristics is formed as a single element. In the surface wave resonator, surface waves are reflected between two opposite end faces of a piezoelectric substrate. The surface wave resonator has IDTs that form first and second resonant units. The distance L between the two end faces is selected to be within a range expressed by (.lambda..sub.1 /2).times.N.sub.1 .+-.(.lambda..sub.1 /20) (N.sub.1 is an integral number) where .lambda.1 represents the wavelength of a surface wave excited by the first resonant unit. The distance L is chosen to be out of a range expressed by (.lambda..sub.2 /2).times.N.sub.2 .+-.(.lambda..sub.1 /20) (N.sub.2 is an integral number) where .lambda..sub.2 represents the wavelength of a surface wave excited by the second resonant unit.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile