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. 01, 2016
Filed:
Dec. 31, 2011
Thomas R. Apel, Austin, TX (US);
Thomas R. Apel, Austin, TX (US);
Other;
Abstract
A method and apparatus for an omnidirectional helically arrayed antenna are described. In accordance with at least one embodiment, a horizontally polarized omnidirectional helically arrayed antenna is provided. In accordance with at least one embodiment, an antenna comprises a helical array of coaxial transmission line radiating elements coupled to one another successively by phase changing couplings. In accordance with at least one embodiment, the antenna is configured to provide an omnidirectional radiation pattern and a polarization dominated by a magnetic field vector component parallel to an axis of the helical array and an electric field vector component perpendicular to the axis of the helical array. In accordance with at least one embodiment, an electrical length of each of the coaxial transmission line radiating elements is an odd integer multiple of a half wavelength in the coaxial medium with a pitch in the range of 0.35 wavelength to 0.50 wavelength.