Antenna and antenna module

摘要

An antenna includes a flexible sheet that includes a first main surface including a first coil electrode located thereon and a second main surface including a second coil electrode located thereon. The first and second coil electrodes are wound in opposite directions when viewed from different directions. A first end of the first coil electrode faces a first end of the second coil electrode through the flexible sheet. Similarly, a second end of the first coil electrode faces a second end of the second coil electrode through the flexible sheet. The first and second coil electrodes define an inductor, the first ends of the first and second coil electrodes define a capacitor, and the second ends of the first and second coil electrodes define a capacitor whereby a resonant antenna is provided.

主权项

1. An antenna module comprising:
an antenna including:
an insulation base member including first and second main surfaces which face each other;a first coil electrode arranged on the first main surface in a winding manner and including end portions; anda second coil electrode arranged on the second main surface, wound in a direction opposite to a winding direction of the first coil electrode when viewed in a direction from the second main surface to the first main surface, and including end portions; and an electromagnetic coupling module including a wireless communication IC and a power-supply coil connected to the wireless communication IC; wherein in a planar view, the electromagnetic coupling module is arranged on the first main surface of the insulation base member so that the electromagnetic coupling module overlaps only with an electrode included in a group of electrodes that are arranged in parallel or substantially in parallel and are defined by the first coil electrode; and the power-supply coil is electromagnetically coupled with the first coil electrode.