Patent ID: 8878739

Claim:
A wireless communication device comprising: a wireless IC device; a multilayer substrate defined by a multilayer body including a plurality of dielectric layers; a resonant circuit connected to the wireless IC device, the resonant circuit including: an inductance element; and a capacitance element provided in the multilayer substrate; and a radiation conductor connected to the resonant circuit; wherein the capacitance element includes: first and second electrode patterns located on at least one layer of the plurality of dielectric layers; and third and fourth electrode patterns that are located on at least another layer of the plurality of dielectric layers and that are opposite the first and second electrode patterns; the first and fourth electrode patterns have an identical potential, and the second and third electrode patterns have an identical potential; and in plan view in a stacking direction of the plurality of dielectric layers, an outline of one of the first and third electrode patterns is present inside an outline of the other, and an outline of one of the second and fourth electrode patterns is present inside an outline of the other.