Electronic device using metal cover as antenna radiator

An electronic device comprising:

• a housing including a front plate and a back plate facing away from the front plate;
• a display positioned within the housing and exposed through the front plate;
• and
• at least one printed circuit board (PCB) interposed between the front plate and the back plate,
• wherein the back plate has a quadrangular shape including a first periphery elongated in a first direction, and a second periphery shorter than the first periphery and elongated in a second direction perpendicular to the first direction and includes:
• a first conductive part having a quadrangular cutting elongated from a corner of the back plate in the second direction, when viewed from above the back plate,
• a second conductive part positioned in the cutting, when viewed from above the back plate, and
• an insulating part of an L shape elongated between the first conductive part and the second conductive part, when viewed from above the back plate, and contacting the first conductive part and the second conductive part,
• wherein the at least one PCB includes:
• a first ground plane interposed between the first conductive part and the front plate,
• a second ground plane electrically connected with the first ground plane, and
• at least one radio frequency communication circuit electrically connected to a first point on the first ground plane adjacent to the first periphery, a second point on the second conductive part adjacent to at least one of the first periphery and the second periphery, and a third point on the first conductive part adjacent to the second periphery,
• wherein the second ground plane is elongated in the second direction parallel to the second conductive part between the second conductive part and the front plate, and
• wherein at least a portion of the second ground plane is elongated and is separated from an edge of the first ground plane by a slit.

An electronic device comprising:

• a housing including a front plate and a back plate facing away from the front plate;
• a display positioned within the housing and exposed through the front plate;
• and
• at least one printed circuit board (PCB) interposed between the front plate and the back plate,
• wherein the back plate has a quadrangular shape including a first periphery elongated in a first direction, and a second periphery shorter than the first periphery and elongated in a second direction perpendicular to the first direction and includes:
• a first conductive part and a second conductive part separated by a first slit, and
• an insulating part formed in the first slit and contacting the first conductive part and the second conductive part,
• wherein the at least one PCB includes:
• a first ground plane interposed between the first conductive part and the front plate,
• a second ground plane electrically connected with the first ground plane, and
• at least one radio frequency communication circuit electrically connected to a first point on the first ground plane adjacent to the first periphery, a second point on the second conductive part adjacent to at least one of the first periphery and the second periphery, and a third point on the first conductive part adjacent to the second periphery,
• wherein the second ground plane is elongated in the second direction parallel to the second conductive part between the second conductive part and the front plate, and
• wherein at least a portion of the second ground plane is elongated and is separated from an edge of the first ground plane by a second slit.