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:
Feb. 23, 2010
Filed:
Aug. 18, 2005
Patrick D. Mckivergan, Londonderry, NH (US);
Patrick D. McKivergan, Londonderry, NH (US);
BAE Systems Information and Electronic Systems Integration Inc., Nashua, NH (US);
Abstract
A compact polarization agile antenna includes a dual-orthogonal loop structure which is excited by a single RF feed (). The loop structure includes a pair of loops (), each loop is connected to ground () through a complex impedance via a solid state switch (). Current flows in the loop when the switch () is closed. The switches () and impedances () in each leg are independently controlled. Additionally, the relative phase of the current in each leg can be controlled over a narrow bandwidth via a complex impedance for narrowband circular polarized applications. Using this approach, orthogonal linear, slant, or left-hand and right-hand circular polarizations can be generated.