Printed circuit board including electroconductive pattern and electronic device including printed circuit board

An electronic device comprising:

• a housing comprising a first plate and a second plate facing in a direction opposite to the first plate;
• a communication circuit arranged inside the housing and configured to transmit and receive using a frequency of 20 GHz to 100 GHz, and
• a printed circuit board comprising:
• a first surface facing the first plate,
• a second surface facing the second plate;
• and
• a plurality of insulating layers laminated on each other between the first surface and the second surface;
• an antenna element arranged in a first region above the second surface of the printed circuit board or between a first pair of insulating layers of the printed circuit board when seen from above the second surface of the printed circuit board;
• and
• a plurality of first electroconductive patterns arranged in a second region that surrounds one surface of the first region between a first pair of directly adjacent layers of the insulating layers of the printed circuit board or between a second pair of directly adjacent layers of the insulating layers when seen from above the second surface of the printed circuit board,
• wherein:
• the antenna element is physically separated from the first electroconductive patterns, and
• the communication circuit is electrically connected to the antenna element.