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:
Jan. 25, 2005
Filed:
Feb. 28, 2003
Davis S. Yip, La Mirada, CA (US);
Edward M. Garber, Los Angeles, CA (US);
Alvin M. Kong, Manhattan Beach, CA (US);
Davis S. Yip, La Mirada, CA (US);
Edward M. Garber, Los Angeles, CA (US);
Alvin M. Kong, Manhattan Beach, CA (US);
Northrop Grumman Corporation, Los Angeles, CA (US);
Abstract
A reflective grating () having spaced grid lines () patterned on a piezoelectric substrate () for controlling the magnitude and phase of surface acoustic waves () in a reflective filter () or resonator. The magnitude and phase of the surface acoustic wave () are controlled by a sampling period () of the reflective grating () and the density and sequence of distributed acoustic reflective dots (). The reflective dots () are randomly distributed within gaps () between adjacent grid lines () or on top of the grid lines () of the reflective grating (). The pattern of the reflective dots distributed within the gaps () or on the grid lines () is determined by the dot density, where the dot density varies from a lowest density of 0 to a maximum density of 1.