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:
Aug. 28, 2007
Filed:
Nov. 07, 2005
Kohji Toda, Yokosuka, JP;
Kohji Toda, Yokosuka, JP;
Other;
Abstract
When input electric signals E(i=1, 2, . . . , n) with frequencies f(i=1, 2, . . . , n), respectively, are applied to an input interdigital transducer, elastic waves are excited in a piezoelectric substrate. Leaky components of the elastic waves are radiated into a material in the form of longitudinal waves, which are reflected at a bottom boundary-surface of the material. One of reflected longitudinal waves are detected at an output interdigital transducer as a delayed output signal with one of the frequencies f. When the delayed output signal is applied to at least one interdigital transducer for radiation, an elastic wave is excited in the piezoelectric substrate. A leaky component of the elastic wave is radiated into the material in the form of a longitudinal wave, which is reflected at the bottom boundary-surface and re-reflected at a top boundary-surface of the material, and thus a continuous reflection occurs.