Abstract: An electrical connector for a circuit card assembly includes a receptacle housing and a mating housing movable relative to the receptacle housing in a connector mating direction. The electrical connector includes contact modules each having a leadframe having signal contacts with a mating conductor, a mounting conductor and a flexible conductor between the mating conductor and the mounting conductor. Each contact module includes an inner dielectric body and an outer dielectric body separate and discrete from the inner dielectric body. The flexible conductors extend between the inner and outer dielectric bodies to allow relative movement of the inner dielectric body in the connector mating direction relative to the outer dielectric body.

Abstract: A communication system includes a first circuit card assembly having a first PCB and a first electrical connector having a receptacle housing and a mating housing received in the receptacle housing and being movable in the receptacle housing in a connector mating direction along a connector mating axis. The second circuit card assembly includes a second PCB and a second electrical connector having a header housing holding second contacts. The first PCB and/or the second PCB includes a slot receiving the other PCB in a board loading direction. The receptacle housing is coupled to the header housing in the board loading direction and the mating housing is movable within the receptacle housing toward the header housing in a connector mating direction generally perpendicular to the board loading direction.

Abstract: Electrical connector includes a housing and a mating array having a plurality of signal contacts and a plurality of ground contacts that are coupled to the housing. The signal contacts and the ground contacts are positioned for mating with signal conductors and ground conductors, respectively, of a mating connector. The ground contacts are plated with a ground-material composition and the signal contacts are plated with a signal-material composition. The ground-material composition is configured to cause a first low-level contact resistance (LLCR) while mated with the ground conductors during operation. The signal-material composition is configured to cause a second LLCR while mated with the signal conductors during operation. The second LLCR is less than the first LLCR during operation.

Abstract: A contact module includes a dielectric holder having right and left sides holding signal contacts. A shield structure is coupled to the dielectric holder providing electrical shielding for the signal contacts. The shield structure has a first ground shield provided at the right side of the dielectric holder and a second ground shield provided at the left side of the dielectric holder. The first and second ground shields are electrically connected together between corresponding pairs of the signal contacts and providing electrical shielding between corresponding signal contacts along a majority of a length of the transition portions.

Abstract: A contact module includes a dielectric holder holding signal contacts and guard traces. The guard traces are electrically commoned and provide electrical shielding between the corresponding signal contacts. A ground shield is coupled to a first side of the dielectric holder and provides electrical shielding for the signal contacts. The ground shield is electrically connected to each guard trace and has a plurality of rails. Each rail has side strips aligned with the signal contacts and connecting strips extending inward from a first edge of the side strip into the dielectric holder to directly engage the corresponding guard traces. The rails are generally L-shaped defined by the side strips and corresponding connecting strips.

Abstract: A communication system includes a first circuit card assembly having a first PCB including a first slot and a first electrical connector mounted to the first PCB along the first slot and having a first mating end. The communication system includes a second circuit card assembly having a second PCB and a second electrical connector mounted to the second PCB and having a second mating end. The first and second circuit card assemblies are mated along a board mating axis parallel to the first slot with the first PCB oriented perpendicular to the second PCB. The first and second mating ends are oriented parallel to the board mating axis. The second PCB is received in the first slot to align the second mating end with the first mating end.

Abstract: A contact module includes a dielectric holder holding signal contacts and guard traces. The guard traces are electrically commoned and provide electrical shielding between the corresponding signal contacts. A ground shield is coupled to a first side of the dielectric holder and provides electrical shielding for the signal contacts. The ground shield is electrically connected to each guard trace and has a plurality of rails. Each rail has side strips aligned with the signal contacts and connecting strips extending inward from a first edge of the side strip into the dielectric holder to directly engage the corresponding guard traces. The rails are generally L-shaped defined by the side strips and corresponding connecting strips.

Abstract: A contact module includes a dielectric holder having right and left sides holding signal contacts. A shield structure is coupled to the dielectric holder providing electrical shielding for the signal contacts. The shield structure has a first ground shield provided at the right side of the dielectric holder and a second ground shield provided at the left side of the dielectric holder. The first and second ground shields are electrically connected together between corresponding pairs of the signal contacts and providing electrical shielding between corresponding signal contacts along a majority of a length of the transition portions.

Abstract: A connector assembly includes a housing and contact modules having signal contacts with signal pins and a ground shield providing electrical shielding for the signal contacts with ground pins. The connector assembly includes a conductive pin organizer coupled to the contact modules having a plurality of ground pin holes receiving ground pins and signal openings receiving signal pins. The conductive pin organizer substantially fills a space between the bottoms of the contact modules and the circuit board to provide electrical shielding for the signal pins between the bottoms of the contact modules and the circuit board.

Abstract: An electrical connector includes a housing and contact modules held by the housing. The contact modules include ground shields having ground contacts. The contact modules have a dielectric carrier that holds signal contacts. The ground contacts are configured for mating with corresponding ground contacts of a complementary mating connector, and are plated with a ground contact plating that includes at least one ground contact plating material. An interface between the ground contacts held and the corresponding ground contacts of the complementary mating connector has a first contact resistance. The signal contacts are configured for mating with corresponding signal contacts of the mating connector, and are plated with a signal contact plating. An interface between the signal contacts held and the signal contacts of the complimentary mating connector has a second contact resistance. The second contact resistance is lower than the first contact resistance.

Abstract: An interconnect system includes a circuit board including a substrate having a first surface and a second surface opposite the first surface, a plurality of signal conductors and a plurality of ground conductors including respective contact pads in a mating area of the substrate for engaging corresponding contacts of an electrical connector, and a plurality of ground vias extending at least partially through the substrate between the first and second surfaces. The ground vias are coupled to corresponding ground conductors. The ground vias include lossy plugs at least partially filling the ground vias. The lossy plugs are manufactured from lossy material capable of absorbing electrical resonance propagating through the substrate.

Abstract: An electrical connector is provided that includes a housing and ground contacts held by the housing for mating with corresponding ground contacts of a complementary mating connector. The ground contacts are plated with a ground contact plating that includes at least one ground contact plating material. Signal contacts are held by the housing for mating with corresponding signal contacts of the mating connector. The signal contacts are plated with a signal contact plating that includes at least one material that is different from the at least one ground contact plating material.

Abstract: An electrical connector includes a housing having a first end and a second end with a mating slot formed between the first and second ends configured to receive a mating connector having contact pads. A leadframe assembly is disposed in the housing. The leadframe assembly has a contact array including ground contacts and signal contacts interspersed between corresponding ground contacts. The leadframe assembly has an overmold body supporting the ground and signal contacts. The overmold body has lossy ground absorbers coupled to corresponding ground contacts. The lossy ground absorbers are manufactured from lossy material absorbing electrical resonance propagating through the leadframe assembly.

Abstract: An interconnect system includes a circuit board including a substrate having a first surface and a second surface opposite the first surface, a plurality of signal conductors and a plurality of ground conductors including respective contact pads in a mating area of the substrate for engaging corresponding contacts of an electrical connector, and a plurality of ground vias extending at least partially through the substrate between the first and second surfaces. The ground vias are coupled to corresponding ground conductors. The ground vias include lossy plugs at least partially filling the ground vias. The lossy plugs are manufactured from lossy material capable of absorbing electrical resonance propagating through the substrate.

Abstract: An electrical connector includes a housing having a first end and a second end with a mating slot formed between the first and second ends configured to receive a mating connector having contact pads. A leadframe assembly is disposed in the housing. The leadframe assembly has a contact array including ground contacts and signal contacts interspersed between corresponding ground contacts. The leadframe assembly has an overmold body supporting the ground and signal contacts. The overmold body has lossy ground absorbers coupled to corresponding ground contacts. The lossy ground absorbers are manufactured from lossy material absorbing electrical resonance propagating through the leadframe assembly.

Abstract: A plug connector includes a plug body having a terminating end terminated to an electrical component and a mating end mated with a mating electrical connector. The plug body has first and second outer sides. The plug body has pockets between the first and second outer sides. A plug shroud extends from the plug body at the terminating end that is configured to be coupled to the electrical component. A contact array is held by the plug body and includes signal and ground contacts. The signal and ground contacts are exposed along the first and second outer sides. At least some of the ground contacts are aligned with corresponding pockets. Resonance-control lossy inserts are provided in corresponding pockets adjacent corresponding ground contacts. The lossy inserts are manufactured from lossy material capable of absorbing electrical resonance propagating through the plug body.

Abstract: A ground contact module includes a ground leadframe having a ground contact with a transition portion extending between mating and terminating ends. A ground dielectric body holds the ground leadframe. The ground dielectric body has a low loss layer overmolded over the ground leadframe. The ground dielectric body has a lossy band separate and discrete from the low loss layer and attached thereto in proximity to the ground contact such that the lossy band is electrically coupled to the ground contact. The lossy band is manufactured from lossy material having conductive particles in a dielectric binder material and absorbs electrical resonance propagating through the contact module stack.

Abstract: An electrical connector includes a housing having a mating housing and a contact organizer. The mating housing has a mating slot configured to receive a mating connector having contact pads. The contact organizer has signal and ground contact channels separated by separating walls with inner ends between the separating walls. The contact organizer has lossy fillers at the inner ends of the ground contact channels. The lossy fillers are manufactured from lossy material capable of absorbing electrical resonance propagating through the housing. The electrical connector includes a contact assembly disposed in the housing with ground contacts and signal contacts interspersed between corresponding ground contacts in corresponding ground and signal contact channels of the contact organizer. The ground contacts are positioned adjacent the lossy fillers at the inner ends of the corresponding ground contact channels.

Abstract: A contact module stack includes signal contact modules and ground contact modules flanking the signal contact modules in a ground-signal-signal-ground contact module arrangement. The signal contact modules each include signal leadframes and signal dielectric bodies. The ground contact modules each include ground leadframes and ground dielectric bodies. The ground leadframes each have at least one ground contact. Each ground dielectric body has a low loss layer on a first side of the ground leadframe and a lossy layer on a second side of the ground leadframe. The lossy layer and the low loss layer substantially enclose a transition portion of the ground contact. The lossy layers are manufactured from lossy material having conductive particles in a dielectric binder material. The lossy layers absorb electrical resonance propagating through the contact module stack.

Abstract: An electrical connector includes a housing having a first end and a second end. The housing has a mating slot formed between the first and second ends configured to receive a mating connector having contact pads. A contact array is received in the housing. The contact array includes ground contacts and signal contacts interspersed between corresponding ground contacts. The ground contacts include attachment portions thereon. At least one lossy ground absorber is received in the housing and is coupled to at least one corresponding ground contact. Each lossy ground absorber includes at least one opening. The at least one opening receives the attachment portion of the corresponding ground contact.