Patent ID: 8294629

Claim:
An antenna device comprising: a magnetic antenna including: a magnetic core; a flexible substrate arranged to wrap around the magnetic core along a surface thereof; and a coil conductor on the flexible substrate; wherein the magnetic core has a substantially plate-shaped configuration including at least two substantially parallel side surfaces, a first main surface, and a second main surface substantially parallel to the first main surface, the at least two substantially parallel side surfaces extending between and connecting the first and second main surfaces; the coil conductor has a single spiral shape including at least two substantially parallel sides and only a single conductor opening located at a winding center of the coil conductor; and the flexible substrate is bent such that the winding center of the coil conductor is located on the first main surface of the magnetic core, so as to wrap around the magnetic core from the first main surface through two different side surfaces of the at least two substantially parallel side surfaces to the second main surface of the magnetic core, and such that two of the at least two parallel sides of the coil conductor are located on the second main surface of the magnetic core; and a plate member including a sheet-shaped conductor provided in a vicinity of the magnetic antenna; wherein the second main surface of the magnetic core faces a main surface of the plate member.