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:
Jan. 30, 2001
Filed:
Jan. 25, 1999
Ala Sharaiha, Rennes, FR;
Jean-Marc Toureilles, Lorient, FR;
Claude Terret, Rennes, FR;
Jean-Pierre Blot, la Turbie, FR;
France Telecom, Paris, FR;
Abstract
A resonant helix antenna comprising at least one helix formed by at least two radiating strands (,to,) printed on a substrate. This antenna comprises a miniaturised structure for the wideband supply of the radiating strands that is printed on the substrate and comprises at least one hybrid coupler made out of semi-localised elements so as to reduce the dimensions thereof. In the case of a quadrifilar helix, formed by four radiating strands, the supply structure comprises three hybrid couplers, for example in the form of a first 180° hybrid coupler (,) associating a supply input and/or output (,) of the antenna with two intermediate outputs and/or inputs (,) phase-shifted by 180° and two 90° hybrid couplers (,) each associating one of the intermediate outputs and/or inputs of the hybrid coupler with one of the ends of two of the radiating strands.