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:
Feb. 06, 2007
Filed:
May. 16, 2005
Gregory A. O'neill, Jr., Rockledge, FL (US);
Young-min JO, Viera, FL (US);
Paul A. Tornatta, Jr., Melbourne, FL (US);
John Charles Farrar, Indialantic, FL (US);
Murray Fugate, Coral Springs, FL (US);
Ki-chul Kim, Suwon, KR;
Joon-wan Lee, Seoul, KR;
Gregory A. O'Neill, Jr., Rockledge, FL (US);
Young-Min Jo, Viera, FL (US);
Paul A. Tornatta, Jr., Melbourne, FL (US);
John Charles Farrar, Indialantic, FL (US);
Murray Fugate, Coral Springs, FL (US);
Ki-Chul Kim, Suwon, KR;
Joon-Wan Lee, Seoul, KR;
SkyCross, Inc., Viera, FL (US);
Abstract
A quadrifilar helical antenna comprising two pairs of filars having unequal lengths and phase quadrature signals propagating thereon. A disk-like impedance matching element disposed at a lower end of the antenna matches a source impedance to an antenna impedance. In certain embodiments a first crossbar connector on a substrate disposed at an upper end of the antenna electrically connects two helical filars to form a first filar pair and a second crossbar connector disposed on the substrate connects two filars to form a second filar pair.