Signal transmission structure, circuit board and connector assembly structure

A circuit board, suitable for connecting to a coaxial connector through an edge of the circuit board, the coaxial connector having a signal pin and a plurality of supporting pins, and the supporting pins are suitable for the mechanical connections with the circuit board, the circuit board comprising:

• a reference plane, 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, wherein the conductive layer comprises:
• 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;
• a signal line, connected to the signal pad, and 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;
• and
• a dielectric layer, disposed between the reference plane and the conductive layer.

A connector assembly structure, comprising:

• a circuit board, comprising:
• a reference plane, having a first non-conductive area and a second non-conductive area adjacent to the first non-conductive area;
• a conductive layer, disposed above one side of the reference plane, wherein the conductive layer comprises:
• a signal pad, 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 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;
• a dielectric layer, disposed between the reference plane and the conductive layer;
• and
• a coaxial connector, having a signal pin and a plurality of supporting pins, wherein the supporting pins are suitable for clipping the circuit board, and the signal pin is suitable for connecting with the signal pad.