Pluggable connector includes a module body having a mating plug that is configured to be inserted into a receptacle assembly during a mating operation. The mating plug has first and second plug sides that face in opposite directions and a front edge that joins the first and second plug sides. The pluggable connector also includes a plurality of signal contacts that are positioned along the first and second plug sides and a ground plate disposed within the mating plug. The ground plate is positioned between the signal contacts along the first plug side and the signal contacts along the second plug side. The pluggable connector also includes a plurality of resonance-control blades disposed within the mating plug and extending between the ground plate and at least one of the first plug side or the second plug side. The resonance-control blades have edge projections that engage the ground plate.