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:
Mar. 23, 1976
Filed:
Apr. 17, 1973
Jean Schifrine, Vaucresson, FR;
Electronique Marcel Dassault, Paris, FR;
Abstract
A high-frequency wave, e.g. from a target reflecting transmitted radar signals, arrives with different phasing at a plurality of spaced-apart receivers or at a single receiver movable with reference to the signal source. The wave components thus received are fed directly to an array of electromechanical input transducers on the entrance side of a piezoelectric crystal, or are transmitted to respective storage elements which temporarily register information of their phasing to modulate a local oscillation delivered to these input transducers, whereby micro-acoustic vibrations are generated in the crystal with a phase relationship corresponding to that of the original wave components. The acoustic waves in the crystal converge, possibly with the aid of an internal or external focusing surface, on the exit side of the crystal to excite one of a multiplicity of mechanoelectrical output transducers producing a signal indicative of that phase relationship. The system can be used to measure angle of incidence, relative radial velocity, source distance, or the harmonics content of the wave to be analyzed.