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:
Apr. 10, 2001
Filed:
Jun. 02, 1999
Patricia Lamata D'Angelo, Marseilles, FR;
Yves Le Nevez, Trets, FR;
Pierre Andre Collet, Grenoble, FR;
Philippe Porte, Aix en Provence, FR;
Gemplus S.C.A., Gemenos, FR;
Abstract
A shielded magnetic-field antenna has at least one turn of a metallic element and metallic tubular shielding positioned around the element. The turn (,) is produced in a printed circuit on a card made of insulating material (,). The shielding has two open rings (,) each produced in a printed circuit and disposed respectively on a bottom card (,) and a top card (,) made of insulating material. The cards are assembled by gripping the turn between the top and bottom cards. A plurality of metallic vias (,) connect side edges of the two rings. The vias extend through the cards, and are positioned around the turn.