A communication device, comprising: a metal frame defining an opening, the metal frame having a first part, a second part bent relative to the first part, a third part adjacent to the second part, and a fourth part bent relative to the third part and different from the first part; a display module; a display panel installed between the display module and the metal frame, and corresponding to the opening of the metal frame; a metal back cover; a printed circuit board, comprising a first circuit block and a second circuit block electrically connected to the first circuit block, each of the first and second circuit blocks (26, 28) comprising a signal terminal (38, 48) and a ground terminal (40, 50), wherein the ground terminals (40, 50) contact the metal back cover; a main body located between the metal frame and the metal back cover, the main body being made of a non-conductive material; characterized by: a first conductor connected between the first part of the metal frame and the signal terminal of the first circuit block of the printed circuit board; a second conductor connected between the second part of the metal frame and the ground terminal of the first circuit block of the printed circuit board; a third conductor having a first portion arranged along the third part and connected to the third part of the metal frame, and a second portion extended from the first portion along a longitudinal direction of the second circuit block, the longitudinal direction being defined along the direction of the fourth part; and a fourth conductor arranged along the longitudinal direction of the second circuit block, and connected to the ground terminal of the second circuit block of the printed circuit board, at least one coupling gap being defined between the second portion of the third conductor and the fourth conductor; wherein the signal terminal of the second circuit block of the printed circuit board is electrically connected to the fourth part of the metal frame. a metal frame defining an opening, the metal frame having a first part, a second part bent relative to the first part, a third part adjacent to the second part, and a fourth part bent relative to the third part and different from the first part; a display module; a display panel installed between the display module and the metal frame, and corresponding to the opening of the metal frame; a metal back cover; a printed circuit board, comprising a first circuit block and a second circuit block electrically connected to the first circuit block, each of the first and second circuit blocks (26, 28) comprising a signal terminal (38, 48) and a ground terminal (40, 50), wherein the ground terminals (40, 50) contact the metal back cover; a main body located between the metal frame and the metal back cover, the main body being made of a non-conductive material; characterized by: a first conductor connected between the first part of the metal frame and the signal terminal of the first circuit block of the printed circuit board; a second conductor connected between the second part of the metal frame and the ground terminal of the first circuit block of the printed circuit board; a third conductor having a first portion arranged along the third part and connected to the third part of the metal frame, and a second portion extended from the first portion along a longitudinal direction of the second circuit block, the longitudinal direction being defined along the direction of the fourth part; and a fourth conductor arranged along the longitudinal direction of the second circuit block, and connected to the ground terminal of the second circuit block of the printed circuit board, at least one coupling gap being defined between the second portion of the third conductor and the fourth conductor; a first conductor connected between the first part of the metal frame and the signal terminal of the first circuit block of the printed circuit board; a second conductor connected between the second part of the metal frame and the ground terminal of the first circuit block of the printed circuit board; a third conductor having a first portion arranged along the third part and connected to the third part of the metal frame, and a second portion extended from the first portion along a longitudinal direction of the second circuit block, the longitudinal direction being defined along the direction of the fourth part; and a fourth conductor arranged along the longitudinal direction of the second circuit block, and connected to the ground terminal of the second circuit block of the printed circuit board, at least one coupling gap being defined between the second portion of the third conductor and the fourth conductor; wherein the signal terminal of the second circuit block of the printed circuit board is electrically connected to the fourth part of the metal frame.