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:
Sep. 16, 2014
Filed:
Nov. 29, 2010
Applicant:
Phil Lafleur, Gloucester, CA;
Inventor:
Phil Lafleur, Gloucester, CA;
Assignee:
Skywave Mobile Communications Inc., Ottawa, ON, CA;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H01Q 19/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A quadrifilar helix antenna system with a finite ground plane has a pair of bifilar helical elements extending upwardly from the finite ground plane. A symmetrical array of monopole elements surrounds the lower portion of the pair of bifilar helical elements in the near field so as to load the lower portion and thereby raise the phase center of the antenna to improve the circularly polarized far-field radiation at low elevation angles.