An electronic apparatus includes: an external coil connected via a pair of a first feed-through portion and a second feed-through portion to a communication circuit, the external coil comprising a first coil part and a second coil part disposed outside a housing; a wireless power transmission circuit; an electrode signal processing circuit included in the housing; an external capacitor disposed outside the housing and connected between the first coil part and the second coil part; a first electrode connected to the first coil part at one end of the external capacitor; and a second electrode connected to the second coil part at another end of the external capacitor.