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:
May. 02, 2000
Filed:
Apr. 07, 1998
Katsuhiro Ikada, Kanazawa, JP;
Abstract
A surface acoustic wave device includes first and second SAW filters and first, second and third SAW resonators. The first SAW filter has first and second ends and a first pass band in a first frequency region, and the second SAW filter has first and second ends and a second pass band in a second frequency region which is lower than the first frequency region. The second end of the second SAW filter is connected to the second end of the first SAW filter in parallel to form a connection point. The first and second one-port SAW resonators are connected in series between the second end of the first SAW filter and the connection point, and have an antiresonant frequency higher than the frequency of the pass band of the first SAW filter. The third one-port SAW resonator connected in series between the second end of the second SAW filter and the connection point and has an antiresonant frequency higher than the frequency of the pass band of the second SAW filter.