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:
Feb. 14, 1978
Filed:
Nov. 30, 1976
Applicant:
Inventors:
Bernard Epsztein, Paris, FR;
Gerard Kantorowicz, Paris, FR;
Assignee:
Thomson-CSF, Paris, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03H / ; H03H / ; H03H / ; H01L / ;
U.S. Cl.
CPC ...
333 71 ; 333 / ; 333 72 ;
Abstract
A high frequency elastic bulk wave filter, using the variation as a function of frequency of the direction in which a bulk wave travelling through an elastic body is diffracted by a flat surface of that body, formed with a grating. The bulk wave beam corresponding to the signal to be filtered, impinges under normal incidence on the grating, the profile of which is designed to minimize the amount of energy contained in the non-dispersive beam specularly reflected by the grating. The filter further comprises a transducer to collect the diffracted wave, applied to an inclined surface, which is parallel to the wave plane of the diffracted wave.