Electrical connector assembly

1. An electrical connector comprising:

an insulating housing;

a plurality of terminals held on the insulating housing, the terminals are arranged in terminal pairs for transmitting differential signals; and

a plurality of shielding sheets held on the insulating housing, each of the shielding sheets including:

at least two walls shielding the terminal pair in at least two directions, and

a plurality of elastic pieces extending from the at least two walls in order to cooperate with a mating connector; wherein

the elastic pieces of each shielding sheet include an inner elastic piece protruding toward an associated terminal pair and an outer elastic piece protruding away from the associated terminal pair.

2. The electrical connector as claimed in claim 1 , wherein each of the shielding sheets includes a main wall and a pair of side walls jointly shielding an associated terminal pair from three directions.

3. The electrical connector as claimed in claim 2 , wherein each of the side walls includes one elastic piece, and the main wall includes a pair of spaced elastic pieces.

4. The electrical connector as claimed in claim 3 , wherein the elastic piece on the side wall is an inner elastic piece.

5. The electrical connector as claimed in claim 3 , wherein all the elastic pieces on the main wall are external elastic pieces.

6. The electrical connector as claimed in claim 3 , wherein the pair of terminals forming the terminal pair are narrow-side coupled.

7. The electrical connector as claimed in claim 6 , wherein the shielding sheet is directly installed to fix on the insulating housing.

8. An electrical connector assembly comprising:

a first electrical connector; and

a second electrical connector mated with the first connector; the second electrical connector comprising:

an insulating housing;

a plurality of terminals held on the insulating housing, the terminals being arranged in terminal pairs for transmitting differential signals, the terminal pairs being arranged in rows and columns; and

a plurality of shielding sheets held on the insulating housing, each of the shielding sheets including:

at least two walls shielding the terminal pair in at least two directions, and

a plurality of elastic pieces extending from the at least two walls; wherein

the elastic pieces of each shielding sheet include an inner elastic piece protruding toward a pair of the terminals forming the terminal pair and an outer elastic piece protruding away from the same pair of terminals.

9. The electrical connector assembly as claimed in claim 8 , wherein the first electrical connector includes a plurality of terminal modules arranged in a row direction, each terminal module includes a shielding member, the inner elastic pieces of the shielding sheet of the second electrical connector in one row are in contact with the shielding member of the terminal module, and the external elastic pieces in the one row are in contact with the shielding member of an adjacent terminal module.

10. The electrical connector assembly as claimed in claim 9 , wherein the terminal modules include cooperating first terminal modules and second terminal modules, the inner elastic piece is in contact with the shielding member of the first terminal module, and the outer elastic piece is in contact with the shielding member of the second terminal module.

11. An electrical connector assembly comprising:

a header connector including an insulative housing with a plurality of differential-pairs for differential signal transmission, each differential pair being equipped with a metallic shielding sheet which defines a first U-shaped structure; and

a receptacle connector including a plurality of terminal modules each including a plurality of terminal pairs for differential signal transmission, each terminal pair being equipped with a ground terminal which defines a second U-shaped structure; during mating, the differential pairs being mated with the corresponding terminal pairs, respectively; wherein

the first U-shaped structure and the second U-shaped structure are arranged opposite toward each other to commonly form a frame structure to circumferentially shield the corresponding differential pair and the terminal pair.

12. The electrical connector assembly as claimed in claim 11 , wherein the shielding sheet includes an inward elastic piece to inwardly contact the corresponding ground terminal belonging to the same frame structure.

13. The electrical connector assembly as claimed in claim 12 , wherein the shielding sheet further includes an outward elastic piece to outwardly contact a neighboring ground terminal belonging to a neighboring frame structure.

14. The electrical connector assembly as claimed in claim 13 , wherein the ground terminal includes a pair of transition portions respectively located by two sides of the corresponding terminal pair.

15. The electrical connector assembly as claimed in claim 14 , wherein a thickness direction of each of the transition portions is perpendicular to that of the terminal pair.

16. The electrical connector assembly as claimed in claim 15 , wherein the inward elastic piece contacts the ground terminal in a direction same with the thickness direction of the transition portion.

17. The electrical connector assembly as claimed in claim 16 , wherein the outward elastic piece contacts the ground terminal in a direction same with the thickness direction of each of the terminal pair.

18. The electrical connector assembly as claimed in claim 17 , wherein each terminal module is further equipped with a metallic ground plate covering and contacting the corresponding ground terminal.