A portable communication device comprising: a first printed circuit board, PCB, and a housing ; a non-conductive member including a conductive portion formed in one or more regions of the non-conductive member ; and an antenna module disposed adjacent to the non-conductive member , wherein the antenna module includes: a second PCB including: a first peripheral edge portion, wherein the first peripheral edge portion faces a side member of the housing ; a second peripheral edge portion opposite to the first peripheral edge portion; a third peripheral edge portion extending between a first end of the first peripheral edge portion and a first end of the second peripheral edge portion; a fourth peripheral edge portion extending between a second end of the first peripheral edge portion and a second end of the second peripheral edge portion; and an antenna array (521-524) including a plurality of antenna elements disposed to form a directional beam; wherein the plurality of antenna elements are disposed in a horizontal direction; and wherein the first peripheral edge portion is parallel to the horizontal direction; characterized in that the conductive portion is formed adjacent to at least a part of the second peripheral edge portion other than the first peripheral edge portion, and at least one of the peripheral edge portions among the third peripheral edge portion and the fourth peripheral edge portion. a first printed circuit board, PCB, and a housing ; a non-conductive member including a conductive portion formed in one or more regions of the non-conductive member ; and an antenna module disposed adjacent to the non-conductive member , wherein the antenna module includes: a second PCB including: a first peripheral edge portion, wherein the first peripheral edge portion faces a side member of the housing ; a second peripheral edge portion opposite to the first peripheral edge portion; a third peripheral edge portion extending between a first end of the first peripheral edge portion and a first end of the second peripheral edge portion; a fourth peripheral edge portion extending between a second end of the first peripheral edge portion and a second end of the second peripheral edge portion; and an antenna array (521-524) including a plurality of antenna elements disposed to form a directional beam; wherein the plurality of antenna elements are disposed in a horizontal direction; and wherein the first peripheral edge portion is parallel to the horizontal direction; a first peripheral edge portion, wherein the first peripheral edge portion faces a side member of the housing ; a second peripheral edge portion opposite to the first peripheral edge portion; a third peripheral edge portion extending between a first end of the first peripheral edge portion and a first end of the second peripheral edge portion; a fourth peripheral edge portion extending between a second end of the first peripheral edge portion and a second end of the second peripheral edge portion; and an antenna array (521-524) including a plurality of antenna elements disposed to form a directional beam; wherein the plurality of antenna elements are disposed in a horizontal direction; and wherein the first peripheral edge portion is parallel to the horizontal direction; wherein the plurality of antenna elements are disposed in a horizontal direction; and wherein the first peripheral edge portion is parallel to the horizontal direction; characterized in that the conductive portion is formed adjacent to at least a part of the second peripheral edge portion other than the first peripheral edge portion, and at least one of the peripheral edge portions among the third peripheral edge portion and the fourth peripheral edge portion. <EOS>