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. 26, 2002
Filed:
Sep. 15, 2000
Walter Bohlman, Berlin, MD (US);
BAE SYSTEMS Aerospace Electronics Inc., Lansdale, PA (US);
Abstract
An antenna comprises a dielectric sheet, a pair of conductive feed stems facing one another on opposite sides of the sheet, and a plurality of conductive antenna elements extending away from each feed stem. Each antenna element on one feed stem forms a pair with an antenna element on the other feed stem. In an embodiment, the antenna comprises four pairs of metal feed stems, radiating from a common center. The antenna elements extend alternately to the two sides of each feed stem. Each antenna element forms a dipole with a matching antenna element directly opposite it on the other feed stem of the same pair. Each pair of feed stems and its antenna elements occupies a quadrant of the antenna. The antenna elements do not overlap with other quadrants. Each antenna element zig-zags so that its electrical length is greater than the distance between its ends. Antenna elements on the same side of a pair of stems form zig-zags that are aligned to minimize variations in the spacing between elements. A coaxial signal feed extends along one feed stem of each pair from the outer end to the center of the antenna, where the outer conductor is connected to one feed stem of the pair and the center conductor is connected to the other feed stem of the pair.