An electronic device (100, 300, 400), comprising: a first electrical structure disposed in an internal space of the electronic device, the first electrical structure comprises at least a portion of a side member at least partially exposed to the exterior of the electronic device, wherein the first electrical structure comprises a conductive portion between a pair of separated non-conductive portions (4101, 4102) in the side member, and the conductive portion is configured to radiate a signal; and a flexible printed circuit board, FPCB, comprising a first fastening area (510, F1) and an extension area extended from the first fastening area, the first fastening area electrically connected to the first electrical structure, wherein the FPCB further comprises: a dielectric substrate comprising a first surface and a second surface facing in a direction opposite to that of the first surface and facing the first electrical structure; a first conductive layer disposed on the first surface of the dielectric substrate; and a first protective layer stacked on the first conductive layer, in the extension area and terminating in the first fastening area; wherein in the first fastening area, the first conductive layer makes electrical contact with the first electrical structure, wherein the first fastening area comprises a screw through hole for screw fastening, and at least one conductive via disposed at a periphery of the screw through hole extending from the dielectric substrate to the first conductive layer, characterized in that the conductive portion comprises a conductive bushing extended to the internal space of the electronic device and comprising a screw fastener, and the first fastening area of the FPCB is fastened to the conductive bushing through a screw. a first electrical structure disposed in an internal space of the electronic device, the first electrical structure comprises at least a portion of a side member at least partially exposed to the exterior of the electronic device, wherein the first electrical structure comprises a conductive portion between a pair of separated non-conductive portions (4101, 4102) in the side member, and the conductive portion is configured to radiate a signal; and a flexible printed circuit board, FPCB, comprising a first fastening area (510, F1) and an extension area extended from the first fastening area, the first fastening area electrically connected to the first electrical structure, wherein the FPCB further comprises: a dielectric substrate comprising a first surface and a second surface facing in a direction opposite to that of the first surface and facing the first electrical structure; a first conductive layer disposed on the first surface of the dielectric substrate; and a first protective layer stacked on the first conductive layer, in the extension area and terminating in the first fastening area; a dielectric substrate comprising a first surface and a second surface facing in a direction opposite to that of the first surface and facing the first electrical structure; a first conductive layer disposed on the first surface of the dielectric substrate; and a first protective layer stacked on the first conductive layer, in the extension area and terminating in the first fastening area; wherein in the first fastening area, the first conductive layer makes electrical contact with the first electrical structure, wherein the first fastening area comprises a screw through hole for screw fastening, and at least one conductive via disposed at a periphery of the screw through hole extending from the dielectric substrate to the first conductive layer, characterized in that the conductive portion comprises a conductive bushing extended to the internal space of the electronic device and comprising a screw fastener, and the first fastening area of the FPCB is fastened to the conductive bushing through a screw.