Antenna device and electronic device including the same

An electronic device comprising:

• a housing comprising:
• a front surface plate;
• a rear surface plate spaced apart from the front surface plate opposite thereto;
• and
• a side surface member surrounding a space between the front surface plate and the rear surface plate having a rectangular shape, and comprising four side surfaces, at least one of a first nonconductive portion and a second nonconductive portion, and a conductive portion interposed between the first nonconductive portion and the second nonconductive portion on at least one of the four sides;
• a touch screen display exposed through the front surface plate;
• at least one wireless communication circuit electrically connected to the conductive portion;
• a conductive intermediate plate which is disposed in the space substantially parallel with the front surface plate, wherein, the conductive intermediate plate comprises a slot extending from the conductive portion, said slot having a longitudinal direction substantially perpendicular from the conductive portion;
• an FPCB which extends from the display, extends from a vicinity of the conductive portion of the side surface member in the longitudinal direction, and comprises a portion interposed between the display and the conductive intermediate plate;
• and
• a conductive member attached to the conductive intermediate plate, or is formed between the conductive intermediate plate and the display to divide the slot into a plurality of portions.