Armoured magnetic field antenna in printed circuit

Details Armoured magnetic field antenna in printed circuit Armoured magnetic field antenna in printed circuit

H - Electricity

01

Q

H01Q 7/04 (2006.01) H01Q 1/22 (2006.01) H01Q 1/38 (2006.01) H01Q 1/52 (2006.01)

Patent

CA 2270197

The invention concerns an armoured magnetic field antenna comprising at least one spire of metal element and a metal tubular armour arranged around said element. The spire (3a) is made of a printed circuit of insulating material (4a). The armour is constituted by two open rings (5a, 6a), made of printed circuit and arranged respectively on a lower card (9a) and an upper card (10a) of insulating material, said cards being assembled by clasping the spire and of a plurality of metal vias (7a, 8a) connecting the edges of the two rings through said cards, said vias being distributed on either side of the spire.

La présente invention concerne une antenne de champ magnétique blindée comportant au moins une spire d'un élément métallique et un blindage tubulaire métallique disposé autour dudit élément. La spire (3a) est réalisée en circuit imprimé sur une carte en matériau isolant (4a). Le blindage est constitué d'une part, de deux anneaux ouverts (5a, 6a), réalisés en circuit imprimé et disposés respectivement sur une carte inférieure (9a) et une carte supérieure (10a) en matériau isolant, lesdites cartes étant assemblées en enserrant la spire et, d'autre part, d'une pluralité de vias métalliques (7a, 8a) reliant les bords des deux anneaux à travers lesdites cartes, lesdits vias étant répartis de part et d'autre de la spire.

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