Patent ID: 7443272

Claim:
A signal transmission structure suitable for a circuit board, the signal transmission structure being located at the edge of the circuit board, the circuit board being connected to a coaxial connector through the signal transmission structure, the coaxial connector has a signal pin and a plurality of supporting pins, and the supporting pins are suitable for the mechanical connections with the circuit board, the signal transmission structure comprising: a reference plane, located inside the circuit board, and having a first non-conductive area and a second non-conductive area adjacent to the first non-conductive area; a conductive layer, located above one side of the reference plane, and on the surface of the circuit board, the conductive layer comprising: a signal pad, suitable to connect the signal pin, and the projection of the signal pad on the reference plane being located in the first non-conductive area, and a signal line, connected to the signal pad, the projection of a portion of the signal line on the reference plane being located in the first non-conductive area and the second non-conductive area, and the signal line comprises: a first line section, connected to the signal pad, and the projection of the first line section on the reference plane being located in the second non-conductive area; a second line section; and a compensation pad, connected between the first line section and the second line section, wherein the compensation pad has a width larger than a width of the first line section.