Electronic device comprising antenna which is using an electrically conductive material included in a housing of the electronic device

An electronic device comprising:

• a housing comprising:
• a first plate,
• a second plate facing away from the first plate, and
• a side member surrounding a space between the first plate and the second plate, the second plate being formed of an electrically conductive material, the side member being formed of an electrically conductive material and including a first side extending in a first direction and having a first length, a second side extending in a second direction perpendicular to the first direction and having a second length shorter than the first length, a third side extending in parallel to the first side and having the first length, and a fourth side extending in parallel to the second side and having the second length, the side member further including an elongated slit extending from a first point in the first side to a second point in the third side along a portion of the first side, the second side, and a portion of the third side, and a non-conductive material filling the slit;
• a touchscreen display exposed through at least a portion of the first plate;
• a wireless communication circuit positioned inside the housing and electrically coupled to a third point and a fourth point in the second plate, the third point being closer to the second side than the fourth point is to the second side;
• a ground plane positioned in the housing in parallel to the second plate, and electrically coupled to at least one fifth point and a sixth point in the second plate, the sixth point being closer to the second side than the fourth point and the at least one fifth point are to the second side, the third point being closer to the second side than the sixth point is to the second side, and the fourth point being closer to the second side than the at least one fifth point is to the second side;
• and
• at least one processor positioned inside the housing and electrically connected to the display and the communication circuit.