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. 10, 2009
Filed:
Jul. 16, 2007
Gregory A. O'neill, Jr., Rockledge, FL (US);
Murray Fugate, Coral Springs, FL (US);
Young-min JO, Viera, FL (US);
John C. Farrar, Indialantic, FL (US);
Myung Sung Lee, Seoul, KR;
Se-hyun OH, Seoul, KR;
Joo Mun Lee, Kyunggi-do, KR;
Jin Hee Yoon, Seoul, KR;
Sang OK Choi, Seoul, KR;
Eun Seok Han, Seoul, KR;
Gregory A. O'Neill, Jr., Rockledge, FL (US);
Murray Fugate, Coral Springs, FL (US);
Young-Min Jo, Viera, FL (US);
John C. Farrar, Indialantic, FL (US);
Myung Sung Lee, Seoul, KR;
Se-hyun Oh, Seoul, KR;
Joo Mun Lee, Kyunggi-do, KR;
Jin Hee Yoon, Seoul, KR;
Sang Ok Choi, Seoul, KR;
Eun Seok Han, Seoul, KR;
Sky Cross, Inc., Melbourne, FL (US);
Abstract
A quadrifilar helical antenna comprising two pairs of filars having unequal lengths and phase quadrature signals propagating thereon. A conductive H-shaped impedance matching element matches a source impedance to an antenna impedance. The impedance matching element having a feed terminal at the center thereof from which current is supplied to the two filars of each filar pair disposed about an edge of the impedance matching element and symmetric with respect to a center of the impedance matching element. The impedance matching element further comprises a reactive element for matching the antenna and source impedances.