Terminal module with improved coupling effect and backplane connector having the same

A backplane connector, comprising:

• a header, the header defining a receiving space for receiving a mating backplane connector;
• and
• a plurality of terminal modules assembled to the header, each terminal module comprising:
• a plurality of conductive terminals, each conductive terminal comprising a contact portion and a connection portion, the conductive terminals comprising differential signal terminals, a first ground terminal and a second ground terminal, the differential signal terminals being located between the first ground terminal and the second ground terminal, the contact portions of the differential signal terminals protrude into the receiving space;
• and
• an insulating frame, the connection portions of the conductive terminals being fixed to the insulating frame, the insulating frame comprising a hollow portion, the connection portions of the conductive terminals being partially exposed to the hollow portion;
• wherein each of the differential signal terminals comprises a first extending portion extending from the contact portion of the differential signal terminal toward the connection portion of the differential signal terminal, a torsion portion connected to the first extending portion, and a second extending portion connected to the torsion portion;
• the contact portion, the first extending portion, the torsion portion and the second extending portion of the differential signal terminal protrude beyond the insulating frame;
• the second extending portion is perpendicular to the first extending portion;
• the differential signal terminals comprise a first signal terminal and a second signal terminal;
• the first extending portion of the first signal terminal comprises a first step surface and a first extension surface connected to the torsion portion of the first signal terminal;
• the first extending portion of the second signal terminal comprises a second step surface and a second extension surface connected to the torsion portion of the second signal terminal;
• the first step surface of the first signal terminal and the second step surface of the second signal terminal are narrow-side coupled;
• the first extension surface of the first signal terminal and the second extension surface of the second signal terminal are wide-side coupled;
• and the second extending portion of the first signal terminal and the second extending portion of the second signal terminal are narrow-side coupled.