According to an embodiment, a high-speed transmission connector includes: a row of first contacts, a row of second contacts, a row of third contacts, a row of fourth contacts, an upper housing that supports the row of first contacts, a lower housing that supports the row of second contacts, and an inner housing that supports the row of third contacts and the row of fourth contacts. The upper housing, the lower housing, and the inner housing are assembled in such a manner that the upper housing and the lower housing face each other in a vertical direction with a gap therebetween, and the inner housing is accommodated in the upper housing and the lower housing. The gap forms a slot into which a header of a device as a communicating counterpart is to be fitted.

An electrical connector, comprising a plurality of first terminals, a plurality of second terminals, and a partitioning member. The plurality of first terminals comprise at least one pair of first differential signal terminals and at least one first ground terminal. The plurality of second terminals comprise at least a pair of second differential signal terminals. The partitioning member is disposed between the first terminals and the second terminals. The partitioning member is grounded and comprises a partitioning member body and at least one first bump. The first bump is disposed at the partitioning member body. The partitioning member body is at least disposed between the pair of first differential signal terminals and the pair of second differential signal terminals to shield the pair of first differential signal terminals and the pair of second differential signal terminals. The first bump is electrically connected with the at least one first ground terminal.

An electrical connector, comprising a plurality of first terminals, a plurality of second terminals, and a partitioning member. The plurality of first terminals comprise at least one pair of first differential signal terminals and at least one first ground terminal. The plurality of second terminals comprise at least a pair of second differential signal terminals. The partitioning member is disposed between the first terminals and the second terminals. The partitioning member is grounded and comprises a partitioning member body and at least one first bump. The first bump is disposed at the partitioning member body. The partitioning member body is at least disposed between the pair of first differential signal terminals and the pair of second differential signal terminals to shield the pair of first differential signal terminals and the pair of second differential signal terminals. The first bump is electrically connected with the at least one first ground terminal.

An electrical connector includes: plural terminal modules stacked laterally, each of the terminal modules including an insulating body, plural pairs of signal terminals held by the insulating body, plural ground terminals held by the insulating body, and a first ground plate and a second ground plate located on opposite sides of the insulating body, wherein: in each terminal module, the ground terminals and the pairs of signal terminals are alternately arranged in a vertical direction, each pair of signal terminals are arranged in a first plane, each ground terminal is arranged in a second plane intersecting the first plane, the first ground plate, the second ground plate, and the ground terminals shield each pair of signal terminals circumferentially.

An electrical connector includes: plural terminal modules stacked laterally, each of the terminal modules including an insulating body, plural pairs of signal terminals held by the insulating body, plural ground terminals held by the insulating body, and a first ground plate and a second ground plate located on opposite sides of the insulating body, wherein: in each terminal module, the ground terminals and the pairs of signal terminals are alternately arranged in a vertical direction, each pair of signal terminals are arranged in a first plane, each ground terminal is arranged in a second plane intersecting the first plane, the first ground plate, the second ground plate, and the ground terminals shield each pair of signal terminals circumferentially.

An electrical connector assembly can include a plug connector mountable to a planar substrate and a receptacle connector configured to receive a plurality of cables and that can mate with the plug connector. The plug connector may include a first inline terminal row and a second inline terminal row exposed on a mounting face to conductively contact the planar substrate. The receptacle connector can include a plurality of terminals having termination ends aligned in common wafer plane that can be conductively terminated with the plurality of cables. The plug connector and the electrical connector are configured to establish electrical channels from the termination ends coplanar with the common wafer plan to the first and second inline terminal rows.

An electrical connector assembly can include a plug connector mountable to a planar substrate and a receptacle connector configured to receive a plurality of cables and that can mate with the plug connector. The plug connector may include a first inline terminal row and a second inline terminal row exposed on a mounting face to conductively contact the planar substrate. The receptacle connector can include a plurality of terminals having termination ends aligned in common wafer plane that can be conductively terminated with the plurality of cables. The plug connector and the electrical connector are configured to establish electrical channels from the termination ends coplanar with the common wafer plan to the first and second inline terminal rows.

An electrical connector includes an insulating body having a mating slot and multiple accommodating slots are in communication with the mating slot. Multiple terminals are accommodated in the accommodating slots. The terminals include ground terminals. Each terminal includes a connecting portion, an elastic arm, a tail portion, and an extending portion located between the connecting portion and the tail portion. The extending portion of each terminal extends obliquely downward and backward from the connecting portion. A grounding member is provided on the insulating body. The grounding member has a multiple upper and lower extending arms. A length of each upper extending arm is shorter than a length of each lower extending arm in the front-rear direction. The upper and lower extending arms respectively abut the ground terminals, thus shortening the transmission paths of the terminals. The grounding member and the ground terminals are in stable connection, thus reducing the resonance.

An electrical connector includes an insulating body having a mating slot and multiple accommodating slots are in communication with the mating slot. Multiple terminals are accommodated in the accommodating slots. The terminals include ground terminals. Each terminal includes a connecting portion, an elastic arm, a tail portion, and an extending portion located between the connecting portion and the tail portion. The extending portion of each terminal extends obliquely downward and backward from the connecting portion. A grounding member is provided on the insulating body. The grounding member has a multiple upper and lower extending arms. A length of each upper extending arm is shorter than a length of each lower extending arm in the front-rear direction. The upper and lower extending arms respectively abut the ground terminals, thus shortening the transmission paths of the terminals. The grounding member and the ground terminals are in stable connection, thus reducing the resonance.

The described connector assemblies are useful in wire-to-board systems. Some assemblies include a free-end connector that is attached to a twin-ax cable, and a fixed-end connector that is attached to a board. Embodiments include a free-end terminal set including a first signal terminal, a second signal terminal and a ground plate. The ground plate has a horseshoe shape and provides a ground terminal on opposing sides of the first and second signal terminals. Additionally, embodiments include a locking system between the free-end connector and fixed-end connector, and lead designs for the fixed-end connector utilizing a similar horseshoe shape as that used for the ground plate of the free-end connector.