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:
Feb. 04, 2003
Filed:
Jul. 30, 2001
Arthur George Roberts, Wellington, NZ;
Andrew Corporation, Orland Park, IL (US);
Abstract
A dual polarization patch antenna comprising a patch, first and second pairs of orthogonally disposed probes feeding said patch, and a first feed network for feeding said first pair of probes from a first feed point. The first feed network comprises a first feed path from said first feed point to a first probe, a second feed path from said first feed point to a second probe, said second feed path being of a different electrical length to said first feed path such as to cause cancellation of signals from said first and second probes at said second pair of probes, and a first frequency dependent element provided in said first feed path for maintaining the desired cancellation over a desired frequency range. A second feed network for feeding said second pair of probes from a second feed point comprises a third feed path from said second feed point to a third probe, a fourth feed path from said second feed point to a fourth probe, said fourth path being of a different electrical length to the third feed path such as to cause cancellation of signals from the third and fourth probes at said first pair of probes, and a second frequency dependent element provided in said third feed path for maintaining the desired cancellation over a desired frequency range.