Patent ID: 7545336

Claim:
An antenna coil comprising: an air-core type flat coil body having a thickness in an axial direction of the coil body; and a coil support member disposed between the coil body and a substrate as a mounting object of the antenna coil so that the coil body is supported on a surface of the substrate, wherein the thickness of the coil body is smaller than a radius of a circle, an area of which is equal to an area of a region surrounded with an outline of a projected coil body, the projected coil body provided by projecting the coil body on a projection plane perpendicular to the axial direction of the coil body, and the coil support member is made of resin hardened soft magnetic material; and wherein the coil support member is a coil case having a coil accommodation space for accommodating the coil body therein, the coil case includes a ring shaped body corresponding to the coil body, and the coil case has a part, which is made of the resin hardened soft magnetic material.