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. 08, 1986
Filed:
Jul. 05, 1984
Takeshi Okamoto, Tokyo, JP;
Shoichi Minagawa, Tokyo, JP;
Clarion Co., Ltd., Tokyo, JP;
Abstract
A surface acoustic wave device comprises a piezoelectric substrate, a pair of transducers provided on the piezoelectric substrate, a center electrode provided in the center between the both transducers, first shield electrode provided between one of the transducers and the center electrode, and second shield electrode provided between the other transducer and the center electrode, with placement substantially represented by: ##EQU1## where l.sub.1 is the width of the individual shield electrodes, l.sub.2 is the distance from the individual shield electrodes to the center electrode, .lambda..sub.0 is the wavelength of a surface acoustic wave at the center frequency, and n.sub.1 and n.sub.2 are whole numbers.