The present disclosure provides a printed circuit board (PCB) comprising a first ground layer extended in one direction a first dielectric layer laminated on the first ground layer and extended in the same direction as that of the first ground layer; a signal transmission line laminated on the first dielectric layer and extended in the same direction as that of the first dielectric layer; and a plurality of first ground patterns formed by etching a surface of the first ground layer in an axial direction thereof at a predetermined interval in a line, wherein the plurality of first ground patterns expose the first dielectric layer.