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:
Jan. 26, 1999
Filed:
Jul. 25, 1996
Katsuhiro Ikada, Kanazawa, JP;
Murata Manufacturing Co. Ltd., Kyoto, JP;
Abstract
A surface acoustic wave device which not only is low-loss in a pass band and has high attenuation in an attenuation region but also has superior power-resistance and has a large reflection coefficient in a blocking region comprises a first one-port SAW resonator filter connected in parallel with a three-electrode vertically connected double mode SAW resonator filter. The first one-port SAW resonator filter is so constructed that its resonance frequency is outside the pass band of the vertically connected double mode SAW resonator filter on the low-frequency side thereof and a connection point between the double mode SAW resonator filter and the first one-port SAW resonator filter is provided to an input terminal.