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. 08, 2011
Filed:
Jan. 08, 2008
Applicant:
Oliver Paul Leisten, Northampton, GB;
Inventor:
Oliver Paul Leisten, Northampton, GB;
Assignee:
Sarantel Limited, Wellingborough, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01Q 1/36 (2006.01);
U.S. Cl.
CPC ...
Abstract
A dielectrically loaded multifilar helical antenna having an operating frequency in excess of 200 MHz has an electrically insulative core with a relative dielectric constant greater than 5 occupying the major part of the interior volume defined by a three dimensional antenna element structure having, in one embodiment, eight coextensive helical tracks and, in another embodiment, six such tracks. The antennas are backfire or endfire antennas, all helical elements being phased so as to contribute to a circular polarization resonance at the operating frequency.