Electronic device

An electronic device comprising:

• one or more zeroth-order resonant antennas each including:
• a ground plate configured to provide a ground potential;
• an opposing conductor arranged at a predetermined distance from the ground plate in a plate thickness direction of the ground plate;
• a plurality of power supply lines electrically connected to the opposing conductor and extending in different directions from different positions of edges of the opposing conductor so as to surround the opposing conductor in a plane orthogonal to the plate thickness direction;
• a short-circuit portion electrically connecting the opposing conductor and the ground plate;
• and
• a power supply controller configured to control power supply to the power supply lines;
• and
• a metal body configured to limit a propagation direction of a radio wave transmitted from or received by the one or more zeroth-order resonant antennas and having an opening, wherein
• the power supply controller is configured to supply power to a part of the power supply lines including the power supply line having an extension direction closest to a direction from the opposing conductor toward the opening or the two power supply lines sandwiching the direction toward the opening in the plane.