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. 11, 2003
Filed:
Oct. 27, 2000
Björn Johannisson, Kungsbacka, SE;
Anders Derneryd, Göteborg, SE;
Martin Johansson, Mölndal, SE;
Telefonaktiebolaget LM Ericsson (publ), Stockholm, SE;
Abstract
A dual-polarized antenna ( ) with good isolation between feed ports ( ) and high similarity with respect to the radiation patterns is provided. An antenna ( ) includes a patch ( ), four symmetrically arranged feed structures ( ), two feed ports ( ) and a feed network ( ). Radiation pattern similarity is obtained by the pair-wise symmetrical, orthogonal layout of the feed structures ( ). Good isolation between feed ports ( ) is achieved through a feed network ( ) divided into two network parts ( ) where each network part ( ) is designed so that each coupling between a network part ( ) and a feed structure ( ) belonging to the other polarization is cancelled by a mirrored coupling with the other feed structure ( ) belonging to the polarization. In addition, a network part ( ) is laid out so that its corresponding feed structures ( ) are fed with supporting signals of equal magnitude.