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. 19, 2002
Filed:
Jul. 11, 1997
Tilmann Kuntzsch, Ulm, DE;
Nortel Networks Limited, St. Laurent, CA;
Abstract
The present invention relates to patch antennas and in particular relates to a feed mechanism therefor. In accordance with one aspect of the invention, there is provided a patch antenna comprising a dielectric substrate having a patch element on a first side and a microstrip feed therefor on a second side and a reflector ground plane; wherein the microstrip feed is connected through the dielectric to the patch whereby the microstrip feed is parallel spaced apart from the patch and from a shielding grounded portion. The patches can be rectilinear or ellipsoidal, and can have one or more feeds. An impedance matching network can be disposed on the antenna dielectric. Preferably, this network is positioned on an opposite side of the dielectric to the patch and shielded by the ground plane. This type of feed arrangement can provide an optimum feed point location for any polarisation. In dual polarised mode, there is no compromise in either cross polar performance nor impedance matching to be performed. No edge interference is produced. A method of operation is also disclosed