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:
May. 15, 2001
Filed:
Nov. 17, 1998
Applicant:
Inventors:
Murat Ermutlu, Helsinki, FI;
Kari Kalle-Petteri Kiesi, Espoo, FI;
Assignee:
Nokia Mobile Phones Ltd., Espoo, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01Q 1/36 ;
U.S. Cl.
CPC ...
H01Q 1/36 ;
Abstract
A quadrifilar helix antenna has four inter-twined helical antenna elements offset from one another by 90°. The elements are identical and each can be defined by an axial coefficient z, a radial coefficient r, and an angular coefficient &thgr;. While the radial coefficient r remains constant along the axis of the elements, the axial coefficient is defined in terms of the angular coefficient according to:
Ermutlu, Murat. (2001). Multi-filar helix antennae (U.S. Patent No. 6232929). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/6232929
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile