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. 09, 2017
Filed:
Jun. 05, 2012
Jacques Antoine Damy, Nice, FR;
Christian Waterkeyn, Valbonne, FR;
Holger Emrich, Munich, DE;
SNAPTRACK, INC., San Diego, CA (US);
Abstract
A filter working with surface acoustic waves comprises a piezoelectric substrate (SU), a first transducer (IDT) arranged in the acoustic track coupled to an input, having a first mean finger period (pi) assigned to a center frequency of a pass band of the filter and a second transducer (IDT) arranged in the acoustic track coupled to an output, having the same first mean finger period (p), and a reflector arranged between first and second transducer having a second mean finger period (p) assigned to a stop band frequency different from the center frequency. Further, a new type of very broad bandwidth filters with small insertion loss and high return loss and high rejection are given that use a substrate that can propagate a PSAW and comprises fan shaped transducers.