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. 18, 2003
Filed:
Oct. 02, 2001
Argy Petros, Lake Worth, FL (US);
XM Satellite Radio, Inc., Washington, DC (US);
Abstract
A drooping quadrifilar helix antenna includes first, second, third, and fourth radiating elements ( , and respectively) of conductive material, each element extending in a first direction in a first plane and at least one of the radiating elements having a portion ( ) thereof drooping in a second direction in a second plane, the antenna further including a dielectric tube ( ) for maintaining a substantial portion of the radiating elements in a substantially helical or spiral shape, a coupler ( ) for coupling electrical energy to and/or from each of said radiating elements, and a feed network ( ) for individually feeding at least two of the radiating elements.