Antenna and electronic device including the same

An electronic device comprising:

• a front cover and a rear cover forming a part of an outer appearance of the electronic device;
• a lateral member disposed in a space between the front cover and the rear cover, extended to a lateral surface of the electronic device to form at least in part a lateral appearance of the electronic device, and including a conductive portion and a non-conductive portion;
• and
• an antenna structure disposed between the front cover and the rear cover, and including:
• a printed circuit board (PCB) disposed in the space;
• and
• an array antenna including a plurality of antenna elements disposed on the PCB at regular intervals and forming a beam pattern toward the lateral surface,
• wherein the non-conductive portion is disposed at a position overlapped with the antenna structure when the lateral surface is viewed from an outside of the electronic device,
• wherein the conductive portion comprises a curved concave portion configured to at least partially accommodate the non-conductive portion while a boundary region between the conductive portion and the non-conductive portion is disposed at a position which is not overlapped with the antenna structure when the lateral surface is viewed from the outside of the electronic device,
• wherein when the rear cover is viewed from above, the curved concave portion is further configured such that a first inclined angle does not exceed 60 degrees, the first inclined angle being between a first inclined line and a vertical line, the first inclined line connecting one of both ends of the antenna structure and a starting point of the curved concave portion starting from the lateral surface, and the vertical line perpendicularly connecting the one end of the antenna structure and the lateral surface,
• wherein the antenna structure is oriented such that a direction between the ends of the antenna structure is parallel to the lateral surface, and
• wherein the curved concave portion is disposed near both right and left ends of the PCB respectively when the lateral surface is viewed from the outside of electronic device.