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:
Aug. 29, 2006
Filed:
Oct. 31, 2002
Olivier Desjeux, Le Landeron, CH;
Laurent Neveux, Monaco, MC;
Olivier Desjeux, Le Landeron, CH;
Laurent Neveux, Monaco, MC;
EM Microelectonics-Marin SA, Marin, CH;
Abstract
The reader or transmitter and/or receiver () includes a sheathed antenna formed of two groups of turns or coils (). The first group of turns or coils forms a sheathed antenna. The second group includes two coils () arranged between the central coil () and respectively the two end coils () of the first group. The second group of coils is powered in phase quadrature relative to the first group of coils, the set of coils being arranged so as to obtain a magnetic field (H) whose amplitude (A) is approximately constant along the central axis () of the antenna inside the overall inner volume of the latter.