Electronic device

An electronic device, comprising:

• a flat plate-shaped circuit board;
• an antenna that is provided on the circuit board and has an antenna pattern that extends in a first direction parallel to a board surface of the circuit board;
• and
• a frame at least a portion of which is electrically connected to the antenna via a ground-contacting surface of the circuit board,
• wherein the frame has a main frame and a side frame,
• wherein at least a portion of the main frame overlaps the circuit board when seen from a direction that is orthogonal to the board surface,
• wherein the side frame is electrically conductive, is connected to the main frame, and direction extends in a that is substantially orthogonal to the board surface at a side of the circuit board,
• wherein the electronic device is configured to perform at least one of transmission and reception of radio waves having a desired wavelength, using a composite antenna that has the antenna and the side frame.