An electronic device is provided. The electronic device includes a housing including a first surface, a second surface opposite to the first surface, and a side surface between the first surface and the second surface, an antenna including a carrier including a first carrier surface facing the side surface, a second carrier surface opposite to the first carrier surface and a plurality of side carrier surfaces between the first carrier surface and the second carrier surface, and a patch positioned on the first carrier surface, a first capacitive sensor positioned between the first carrier surface and the side surface, and a filler positioned between the side surface and the first carrier surface.