IC tag and electronic apparatus

An electronic apparatus comprising:

• an IC tag which comprises:
• a substrate made of a dielectric material;
• an antenna pattern disposed on a surface of the substrate;
• a communication circuit chip connected to one end and other end of the antenna pattern, wherein the communication circuit chip performs transmission processing and/or reception processing of a radio signal;
• and
• external circuit connection parts connected to the antenna pattern in vicinity of the one end and the other end thereof on the surface or a rear surface of the substrate, each of the external circuit connection parts comprising a first conductive part and a second conductive part facing each other and interposed by the substrate, the first conductive part being connected to the antenna pattern, the second conductive part being formed as a pad to be connected to an external circuit;
• and
• the external circuit which comprises:
• a rectifying circuit connected to the pad of the IC tag for rectifying signal obtained via the pad;
• and
• a detection circuit that detects rectified signal from the rectifying circuit, wherein the external circuit connection parts galvanically isolate the IC tag from the external circuit.