Electrical connector assembly

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 are arranged in terminal pairs for transmitting differential signals, the terminal pairs are 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.

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.