ANTENNA DEVICE AND IC CARD HAVING THE SAME

Abstract: disclosed herein is an antenna device that includes a metal plate having a through hole, a first coil wound along the through hole and having an opening that overlaps the through hole, and a second coil wound along an outer edge of the metal plate and connected to the first coil. the edge of the through hole includes a first edge positioned on one side in a first direction as viewed from a center of the first through hole and a second edge positioned on another side in the first direction as viewed from the center of the first through hole. the first edge has a first protruding part protruding toward the second edge and overlapping a winding area of the first coil. the second edge has a second protruding part protruding toward the first edge and overlapping the winding area of the first coil.

Inventor(s): Shoma KAJIKIYA, Toshio TOMONARI

CPC Classification: H01Q1/2216 ({used in interrogator/reader equipment})

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