Electrical connector and assembly thereof with improved shielding effect

An electrical connector assembly, comprising:

• an electrical connector, comprising:
• an insulating body comprising a mating surface and a mating slot extending through the mating surface;
• a terminal module comprising an insulating block and a plurality of conductive terminals fixed to the insulating block, the insulating block comprising a mounting groove, each conductive terminal comprising a mating elastic arm extending beyond the insulating block so as to extend into the mating slot, the plurality of conductive terminals comprising a first signal terminal, a second signal terminal, a first ground terminal located on one side of the first signal terminal and adjacent to the first signal terminal, and a second ground terminal located on another side of the second signal terminal and adjacent to the second signal terminal, the first signal terminal and the second signal terminal forming a differential pair signal terminals, the differential pair signal terminals are located between the first ground terminal and the second ground terminal, the first ground terminal comprising a first body portion exposed in the mounting groove, the second ground terminal comprising a second body portion exposed in the mounting groove;
• and
• a shielding piece comprising a base portion, an elastic arm portion and an abutting portion connected with the elastic arm portion, the base portion being at least partially received in the mounting groove, the base portion comprising a first fixing portion fixed to the first body portion of the first ground terminal, a second fixing portion fixed to the second body portion of the second ground terminal, and a raised portion connecting the first fixing portion and the second fixing portion, the raised portion being spanned over the first signal terminal and the second signal terminal so that the raised portion is not in contact with the first signal terminal and the second signal terminal, the elastic arm portion at least partially extending beyond the insulating block, the abutting portion comprises a first abutting portion floating in abutment against the mating elastic arm of the first ground terminal, and a second abutting portion floating in abutment against the mating elastic arm of the second ground terminal;
• and
• a mating module comprising a plurality of mating conductive pads;
• when the mating module is inserted into the mating slot, the mating conductive pads abut against the mating elastic arms of the conductive terminals;
• wherein the elastic arm portion, the first abutting portion and the second abutting portion are deformable with the deformation of the mating elastic arm of the first ground terminal and the mating elastic arm of the second ground terminal.