Electronic device comprising antenna

An electronic device comprising:

• a housing configured to resonate at a first frequency and a second frequency and comprising a first slit extending in a first direction and having a length corresponding to the first frequency and a second slit extending, from a first point of the first slit, in a second direction different from the first slit and having a length corresponding to the second frequency;
• a printed circuit board disposed inside the housing and in which a slit is formed in at least part of a region corresponding to the first slit and the second slit;
• and
• a feeding part disposed on the printed circuit board and configured to feed through one point of the housing, the one point being adjacent to the first point where the first slit is intersected with the second slit.

A portable electronic device comprising:

• a housing including a first plate, a second plate facing in a direction opposite to the first plate, and a side member surrounding a space between the first plate and the second plate, wherein a substantial portion of the second plate is made of an electrically conductive material;
• a printed circuit board (PCB) positioned inside the space between the first plate and the second plate;
• a processor positioned on the PCB;
• and
• a wireless communication circuit positioned in the space and electrically connected to the processor,
• wherein the second plate has a rectangular shape, the rectangular shape 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 longer than the first length;
• a third side extending in the first direction to be parallel to the first side and having the first length;
• and
• a fourth side extending in the second direction to be parallel to the second side and having the second length,
• wherein the second plate includes:
• a first slit extending from a first location of the second side or from a periphery of the first location in the first direction between the first side and the third side when viewed from above the second plate,
• a second slit extending from the first location of the second side or from the periphery of the first location in the second direction when viewed from above the second plate and connected to the first slit, and
• an electrical non-conductive material configured to fill at least part of the first slit or the second slit,
• wherein the PCB includes a slit facing the first slit of the second plate,
• wherein the wireless communication circuit is electrically connected to a first conductive portion on the PCB,
• wherein the first conductive portion is disposed, at a periphery of the second side of the second plate and between the first side of the second plate and the first slit, when viewed from above the second plate, and
• wherein the first conductive portion is electrically connected to one point of the second plate facing the first conductive portion of the PCB.