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:
May. 22, 2012
Filed:
May. 28, 2009
Kanti N. Patel, Newtown, PA (US);
Kanti N. Patel, Newtown, PA (US);
Lockheed Martin Corporation, Bethesda, MD (US);
Abstract
A composite polarizer including a first polarizer having a plurality of parallel metal vanes and a second polarizer having a plurality of parallel layers of dielectric material is provided. The first polarizer is disposed on an axis, and has a phase advance orientation orthogonal to the axis. The second polarizer is disposed on the axis and has a phase advance orientation orthogonal to the axis. The first polarizer has a first differential phase shift for a first frequency fand a second differential phase shift for a second frequency f. The second polarizer has a first differential phase shift for the first frequency fand a second differential phase shift for the second frequency f. A total of the first differential phase shifts of the first and second polarizers is about 90°, and a total of the second differential phase shifts of the first and second polarizers is about 90°.