An electronic device that includes a circuit board which is arranged between a front cover and a back cover, and includes a conductive pattern inserted into the circuit board. A signal generation or power supply element is electrically connected with the conductive pattern. An adhesion layer is attached onto the circuit board and overlaps at least part of the conductive pattern when viewed from above the circuit board. A first structure is arranged on the adhesion layer and overlaps at least part of the adhesion layer when viewed from above the circuit board. A second structure is arranged on a top of the first structure, overlaps at least part of the first structure when viewed from above the circuit board, and the second structure includes a bottom surface including metal. A metal layer is inserted between the first structure and the bottom surface of the second structure to attach the second structure to the first structure.