Method and electronic device for improving antenna performance

An electronic device comprising:

• a first housing;
• a second housing foldably connected to the first housing through a hinge device;
• a flexible display disposed at the first housing and the second housing, the flexible display comprising:
• a display panel, and
• a conductive plate disposed under the display panel and electrically connected to a common ground;
• a protective frame at least partially covering an edge of the flexible display;
• a conductive member disposed on an inner surface of the protective frame, the conductive member comprising:
• a first portion extending along a longitudinal direction of the protective frame corresponding to the edge of the flexible display, and
• at least two second portions extending from the first portion toward the conductive plate;
• and
• an antenna using at least a portion of the conductive plate,
• wherein an end of each the at least two second portions of the conductive member are disposed adjacent to the conductive plate, and
• wherein the conductive member is configured such that a wireless signal radiating from the antenna radiates through a space between consecutive second portions among the at least two second portions of the conductive member.