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:
Jul. 27, 2004
Filed:
Sep. 27, 2001
David D. Crouch, Corona, CA (US);
William E. Dolash, Montclair, CA (US);
Raytheon Company, Waltham, MA (US);
Abstract
A flat metal plate ( ) has a plurality of holes ( ) that have a property that changes across the surface of the plate so that the flat plate ( ) mimics the behavior of a curved wavefront transformer. The changing property can include a dimension, such as radius or depth, such that the holes ( ) near the center of the plate ( ) are smaller, for example, than the holes ( ) further away from the center of the plate ( ). The size of each hole ( ) is a function of the local phase change imparted on an electromagnetic wave of a particular wavelength or frequency that hits the hole ( ), plus the propagation phase change that occurs in the reflected wave exiting the hole ( ) as it travels the distance between the hole ( ) and the focal point.