Patent RE40129 was granted and assigned to Southwest Research Institute on March, 2008 by the United States Patent and Trademark Office.
A wideband multi-mode antenna having low VSWR operating characteristics. The antenna is has a shape similar to a helical antenna, but is formed from a right-triangularly shaped piece of conductive material. The result is a rolled planar antenna having a height and diameter predetermined to provide optimum VSWR for a given frequency range.