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. 19, 1991
Filed:
Jun. 19, 1989
Gerald C Dorman, Lindenhurst, NY (US);
Joseph Ranghelli, Brooklyn, NY (US);
Raytheon Company, Lexington, MA (US);
Abstract
A miniature anechoic changer for testing antennas capable of producing radio frequency energy with a planar wavefront substantially uniform and free of distortion is shown. The chamber is comprised of a source antenna located in the near field of the test antenna radiating radio frequency energy having a wavefront with an amplitude having a distribution pattern that approximates (SIN X)/X and a lens having a focal point mounted such that the focal point of the lens is located in the center of the source antenna. As the source antenna radiates energy the energy passing through the lens is converted from a spherical wavefront to a planar wavefront substantially uniform and free of distortion.