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:
Oct. 19, 2010
Filed:
Oct. 19, 2007
Applicant:
Philip R. Cowles, Cambridge, CA;
Inventor:
Philip R. Cowles, Cambridge, CA;
Assignee:
Com Dev International Ltd., Cambridge, CA;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H01Q 1/36 (2006.01);
U.S. Cl.
CPC ...
Abstract
Various embodiments are described of an antenna including a common ground plane, a first set of N approximately resonant elements with a length Iand a second set of M approximately resonant elements with a length I. The first set of N approximately resonant elements are wound to form a first helix with an initial diameter dand a height hThe second set of M approximately resonant elements are wound in the opposite direction to the first set of N approximately resonant elements to form a second helix. The second helix is centrally disposed within the first helix, and dis less than dand his greater than h