Patent ID: 7758388

Claim:
An electrical connector assembly, comprising: a receptacle connector having a receptacle housing and a plurality of receptacle contacts received in the receptacle housing, the receptacle housing comprising a base portion and an expansion portion extending outwards from the base portion; and a plug connector mating with the receptacle connector, the plug connector comprising a plug housing and a plurality of plug contacts retained in the plug housing, each of the receptacle contacts and the plug contacts defining a mating portion, a retention portion retained with associated housing and a tail portion extending beyond the associated housing; wherein the receptacle contacts and the plug contacts are divided into two groups respectively, each group of contacts comprises two pairs of differential signal contacts and a grounding contact arranged between the two pairs of differential signal contacts, and one of the two pairs of differential signal contacts are located on an outer side of the group of contacts, wherein the two groups of receptacle contacts are opposite to each other, wherein the other pair of differential signal contacts are arranged between two grounding contacts, wherein each group of contacts comprises a positive signal contact and a negative signal contact, and a grounding contact is disposed between one pair of differential signal contacts and the positive signal contact.