Electrical connector

1. An electrical connector, comprising:

an elongated insulative body comprising a base portion and a mating portion extending forward from the base portion, the base portion of the insulative body being provided with a plurality of terminal grooves extended to the mating portion;

a terminal positioning member provided to a rear end of the base portion of the insulative body, the terminal positioning member comprising a plurality of positioning grooves and a plurality of spacing ribs positioned between the positioning grooves; and

a first group of terminals respectively mounted in the terminal grooves of the insulative body, the first group of terminals comprising at least a signal terminal pair formed by two adjacent signal terminals and a plurality of ground terminals respectively provided at two sides of the signal terminal pair, each terminal of the first group of terminals comprising a first retaining portion retained in the corresponding terminal groove, a first contact portion extending from the first retaining portion and extending to the mating portion, a first positioning portion extending rearwards from the first retaining portion and a first tail portion;

the first positioning portions of the signal terminals and the ground terminals being received in the corresponding positioning grooves of the terminal positioning member;

in the spacing ribs related with the first group of terminals, the spacing rib positioned between the two first positioning portions of the signal terminal pair of the first group of terminals being longer, and the spacing rib positioned between the first positioning portion of the signal terminal and the first positioning portion of the adjacent ground terminal being shorter; and

the shorter spacing rib positioned between the first positioning portion of the signal terminal and the first positioning portion of the adjacent ground terminal making side edges between of the first positioning portion of the signal terminal and the first positioning portion of the adjacent ground terminal having larger exposed areas directly facing each other relative to side edges between the two first positioning portions of the signal terminal pair.

2. The electrical connector according to claim 1 , wherein the first group of terminals comprise three ground terminals and two groups of signal terminal pair, the three ground terminals and the two groups of signal terminal pair are staggered side by side.

3. The electrical connector according to claim 1 , wherein the first retaining portion of each terminal of the first group of terminals comprises at least an aperture.

4. The electrical connector according to claim 2 , wherein

the electrical connector further comprises a second group of terminals;

the second group of terminals comprises at least a signal terminal pair formed by two adjacent signal terminals and a plurality of ground terminals respectively provided at two sides of the signal terminal pair of the second group of terminals;

each terminal of the second group of terminals comprises a second retaining portion retained in the corresponding terminal groove, a second contact portion extending from the second retaining portion and extending to the mating portion, a second positioning portion extending rearwards from the second retaining portion and a second tail portion, the second positioning portion of each terminal of the second group of terminals is received in the corresponding positioning groove of the terminal positioning member; and

in the spacing ribs related with the second group of terminals, the spacing ribs positioned between the two second positioning portions of the signal terminal pair of the second group of terminals are longer relative to the spacing ribs positioned between the second positioning portion of the signal terminal and the second positioning portion of the adjacent ground terminal of the second group of terminals.

5. The electrical connector according to claim 4 , wherein the second group of terminals comprise three ground terminals and two groups of signal terminal pair, the three ground terminals and the two groups of signal terminal pair of the second group of terminals are staggered side by side.

6. The electrical connector according to claim 5 , wherein

the electrical connector further comprises a third group of terminals;

each terminal of the third group of terminals comprises a third retaining portion retained in the corresponding terminal groove, a third contact portion extending from the third retaining portion and extending to the mating portion, a third positioning portion extending rearwards from the third retaining portion and a third tail portion, the third positioning portion of each terminal of the third group of terminals is received in the corresponding positioning groove of the terminal positioning member; and

the spacing ribs positioned between the third positioning portions of the terminals of the third group of terminals are identical in length.

7. The electrical connector according to claim 6 , wherein the third group of terminals comprise fifteen parallel terminals; in the fifteen terminals, the third contact portions of the two terminals further protrude rearwards than the other third contact portions of the third group of terminals.

8. The electrical connector according to claim 6 , wherein a height of the first positioning portion of the first group of terminals is different from a height of the second positioning portion of the second group of terminals and a height of the third positioning portion of the third group of terminals.

9. The electrical connector according to claim 1 , wherein the terminal positioning member comprises a raised portion, the first positioning portions of the first group of terminals are positioned on the raised portion.

10. The electrical connector according to claim 6 , wherein the first retaining portion of each terminal of the first group of terminals comprises at least an aperture, the second retaining portion of each terminal of the second group of terminals and the third retaining portion of each terminal of the third group of terminals each do not comprise an aperture.

11. The electrical connector according to claim 1 , wherein the terminal positioning member and the insulative body are separately manufactured, two sides of the terminal positioning member each are provided with a latching structure engaged on the insulative body.

12. The electrical connector according to claim 11 , wherein the latching structure of the terminal positioning member comprises a latching hook and a guiding bar, the insulative body is provided with a guiding groove corresponding to the guiding bar and a latching portion correspondingly engaged with the latching hook.

13. The electrical connector according to claim 6 , wherein the mating portion comprises a mating groove, the second group of terminals and the third group of terminals extend along an inner wall surface of the mating groove, the second group of terminals and the third group of terminals are spaced apart by a spacing region, the first group of terminals extend along another inner wall surface of the mating groove and face the spacing region.