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:
Oct. 24, 2006
Filed:
Mar. 11, 2003
Marc Solal, Nice, FR;
Serge Calisti, Marseilles, FR;
Vincent Laude, Villemoisson sur Orge, FR;
Sylvain Ballandras, Avanne-Aveney, FR;
Serge Camou, Tokyo, JP;
Thomas Pastureaud, Mougins-le-Haut, FR;
Marc Solal, Nice, FR;
Serge Calisti, Marseilles, FR;
Vincent Laude, Villemoisson sur Orge, FR;
Sylvain Ballandras, Avanne-Aveney, FR;
Serge Camou, Tokyo, JP;
Thomas Pastureaud, Mougins-le-Haut, FR;
Thales, Neuilly-sur-Seine, FR;
Abstract
The invention relates to interfaces acoutics wave components made of lithium tantalate. Two substrate make up the filter have the same cut and the same crystal orientation, the invention gives the best cut angles in particular for optimizing the electromechanical coupling coefficient that determines the final performance characteristics of the component produced. Curves giving the variations of the coupling coefficient an the attenuation as a function of the cut angles and of the direction of propagation are provided. The values of the main acoustic characteristics of the component for these optimum cut angles are also given. The application of this type of device are, on the on hand, uses as a passive component such a resonator or a filter or a delay line, or as an integrated device, either in a measurement chain or in any array of devices operating according to the principle of recognition of the device by a phase code.