An electronic device according to certain embodiments, comprises a bracket defining a portion of a surface of the electronic device, the bracket including metal and having a recess formed therein, wherein the recess is formed by an inner wall including a resting region and an inclined region facing a different direction from the inner wall; and an antenna substrate including a conductive pattern, a first surface including a radiation area configured to radiate an RF signal from the conductive pattern, and a second surface opposite the first surface, wherein the antenna substrate is disposed in an interior of the recess such that the first surface faces an opened portion of the recess, the second surface faces the inner wall.