Electronic device including antenna device

A portable communication device, comprising:

• a housing configured to form at least one portion of a surface of the portable communication device, wherein the at least one portion of the surface includes a first surface and a second surface that faces in a direction opposite to the first surface;
• a display at least partially housed in the housing and including a display area visible via at least one portion of the first surface;
• a radiating element at least partially forming at least one portion of the first surface;
• a printed circuit board (PCB) disposed below the display and including a ground element;
• a conductive element disposed below the PCB;
• a processor configured to transmit a control signal;
• and
• a switch configured to selectively electrically connect the conductive element with the ground element based at least in part on the control signal.

A wearable electronic device, comprising:

• a display including a display area visible via at least one portion of a front surface of the wearable electronic device;
• a radiating element at least partially surrounding the at least one portion of the front surface;
• a printed circuit board (PCB) disposed below the display and including a ground element;
• a conductive element disposed below the PCB and electrically connected with the radiating element;
• a processor configured to transmit a control signal;
• and
• a switch adapted to selectively electrically connect the conductive element with the ground element based at least in part on the control signal.