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. 07, 2003
Filed:
Jul. 20, 2001
Daniel Davis, Baltimore, MD (US);
Northrop Grumman Corporation, Los Angeles, CA (US);
Abstract
Ninety-one elements are arranged in a phased array of five concentric hexagonal rings about a center element and are connected so as to form nineteen hexagonal sub-arrays of seven dipole elements each and where every second interior element is coincident with a digital beam forming input/output port connected to an adjacent seven sub-aperture feed ports. The center element of each hexagonal sub-array and the elements in the outermost hexagonal ring are fed from one sub-aperture feed port while the interior elements surrounding respective center elements are fed from one sub-aperture feed port of two adjacent input/output ports by way of an element containing a signal combiner. Moreover, the center element of a sub-aperture feed has twice the power as surrounding elements of the sub-aperture. A digital beam former (DBF) is used as an input on transmit or output on receive to produce proper amplitudes and phases to steer the antenna and generate overlapping beams.