Electrical connector with improved signal transmission quality

1. An electrical connector, comprising:

an insulative housing;

a plurality of conductive contacts received in the insulative housing and comprising a plurality of first conductive contacts and a plurality of second conductive contacts alternatively arranged with the first conductive contacts; the first conductive contacts comprising a ground contact and two pairs of differential pair located at opposite sides of the ground contact, each first conductive contact comprising a first contacting portion, a first termination portion extending beyond the insulative housing and a first intermediate portion connecting the first contacting portion and the first termination portion;

each second conductive contact comprising a second contacting portion, a second termination portion extending beyond the insulative housing and a second intermediate portion connecting the second contacting portion and the second termination portion, wherein

the distance between the first intermediate portion of the differential pairs of the first conductive contacts and the second intermediate portion of an adjacent second conductive contact is bigger than or equal to the width of the first intermediate portion of the differential pairs, and the width of the first intermediate portion is bigger than that of the second intermediate portion of the second conductive contact.

2. The electrical connector as claimed in claim 1 , wherein the first intermediate portions of the first conductive contacts and the second intermediate portions of the second conductive contacts are coplanar with one another.

3. The electrical connector as claimed in claim 2 , wherein the first termination portions of the first conductive contacts and the second termination portions of the second conductive contacts are coplanar with one another.

4. The electrical connector as claimed in claim 1 , wherein the first contacting portion of the first conductive contact is elastic and forms a curved contacting arm at a free end thereof.

5. The electrical connector as claimed in claim 4 , wherein the second contacting portion of the second conductive contact is rigid and flat and forms a tip portion bending vertically therefrom.

6. The electrical connector as claimed in claim 1 , wherein the insulative housing comprises a main portion and a mating portion extending forwardly from the main portion.

7. The electrical connector as claimed in claim 6 , wherein the main portion defines a plurality of first retaining slots to receive the first intermediate portions of the first conductive contacts, and a plurality of second retaining slots to receive the second intermediate portions of the second conductive contacts, and wherein the first and second retaining slots are alternatively arranged and penetrate through the insulative housing.

8. The electrical connector as claimed in claim 7 , wherein the insulative housing defines a plurality of spaced openings at the junction section between the main portion and the mating portion to receive the first contacting portions of the first conductive contacts.

9. The electrical connector as claimed in claim 8 , wherein the spaced openings penetrate through the insulative housing along an up-to-down direction and communicate with corresponding first retaining slots.

10. The electrical connector as claimed in claim 9 , wherein the main portion and the mating portion respectively define a plurality of first heat-radiation holes and a plurality of second heat-radiation holes for enhancing heat radiation effect.

11. The electrical connector as claimed in claim 1 , further comprising a metal shell enclosing the insulative housing.

12. The electrical connector as claimed in claim 11 , wherein the metal shell

comprises an upper wall, a lower wall opposite the upper wall and a pair of lateral walls located between the upper wall and the lower wall, and

wherein a receiving space is circumscribed by the upper wall, the lower wall and the lateral walls to receive the insulative housing.