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. 09, 2000
Filed:
Feb. 13, 1998
Telefonaktiebolaget LM Ericsson, Stockholm, SE;
Abstract
Dual polarized antenna device for wireless transmission of information using electromagnetic signals with polarizations orthogonal to each other, with at least one antenna element and at least one ground plane made from a first electrically conducting layer, at least one feeder network made from a second electrically conducting layer and a plurality of apertures in said ground plane, which apertures each consist of one or several aperture sections, and which extend between two end points, which apertures are arranged in at least one aperture group, with each aperture group being symmetrical relative to the planes which are defined by the two polarizations, and with each aperture group consisting of at least one first aperture, which aperture is centrally positioned in the group and is intended for the first polarization, and at least two outer apertures intended for the second polarization, symmetrically positioned on each side of the central aperture with the distance along a straight line between the end points of at least one of the apertures along an imagined line parallel to the main direction of the aperture being less than the total sum of the lengths of the sections of the aperture.