| 主权项 |
1. A printed circuit board (PCB), comprising:
a board body comprising a top surface, a bottom surface, a first side surface, a second side surface, a third side surface and a fourth side surface; a signal transmission line laid in the board body; and a metal bracket attached to the board body; wherein the metal bracket comprises a first connecting portion, a second connecting portion, a third connecting portion and a fourth connecting portion which are serially connected; the first connecting portion, the second connecting portion, the third connecting portion and the fourth connecting portion closely contact with the first side surface, the second side surface, the third side surface and the fourth side surface respectively; and the first connecting portion, the second connecting portion, the third connecting portion and the fourth connecting portion are configured to shield electromagnetic interference (EMI) in the signal transmission line when transmitting high-speed differential signals. |
