COIL ANTENNA DEVICE, ELECTRONIC APPARATUS WITH COIL ANTENNA DEVICE, AND METHOD OF PRODUCING COIL ANTENNA DEVICE

摘要

A coil antenna device includes a planar magnetic body and a conducting wire wound around the planar magnetic body multiple times as a coil having a prescribed length in a direction parallel to a long side of the magnetic body. The magnetic body includes at least one irregular portion having a different cross-sectional shape from a cross-sectional shape of another portion of the magnetic body at an intermediate position of the long side of the magnetic body, at which the conducting wire is wound around the magnetic body. The at least one irregular portion extends parallel to a short side of the magnetic body.

主权项

1. A coil antenna device comprising:
a planar magnetic body; and a conducting wire wound around the planar magnetic body multiple times as a coil having a prescribed length in a direction parallel to a long side of the magnetic body, wherein the magnetic body includes at least one irregular portion having a different cross-sectional shape from a cross-sectional shape of another portion of the magnetic body at an intermediate position of the long side of the magnetic body, at which the conducting wire is wound around the magnetic body, the at least one irregular portion extending parallel to a short side of the magnetic body.