Gemplus

Patricia Lamata D'Angelo

Philippe Porte

Pierre Andre Collet

Yves Le Nevez

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.

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Marseilles, France

Patricia Lamata D'Angelo