Electrical connection system for shielded wire cable
View Patent ↗An electrical connection system configured to terminate electrical connectors and to transmit digital electrical signals having a data transfer rate of 5 Gigabits per second (Gb/s) or higher. The system includes a first parallel mirrored pair of terminals having a planar connection portion and a second pair of parallel mirrored terminals having a cantilever beam portion and a contact points configured to contact the first terminals. The cantilever beam portions are generally perpendicular to the planar connection portions. The terminals cooperate to provide consistent characteristic impedance. The connection system further includes an electromagnetic shield that longitudinally surrounds the terminals. The connection system is suited for terminating wire cables transmitting digital signals using data transfer protocols such as Universal Serial Bus (USB) 3.0 and High Definition Multimedia Interface (HDMI) 1.4.
1. An electrical connection system, comprising:
a first shielded cable having a first electrical conductor and a second electrical conductor surrounded by a first shield conductor which is surrounded by a first insulating jacket;
a second shielded cable having a third electrical conductor and a fourth electrical conductor surrounded by a second shield conductor which is surrounded by a second insulating jacket;
a plug connector having a first plug terminal and a second plug terminal;
a receptacle connector configured to mate with said plug connector having a first receptacle terminal and a second receptacle terminal configured to receive the first and second plug terminals respectively;
a plug shield longitudinally surrounding the plug connector and electrically isolated from the plug terminals having an upper plug shield and a lower plug shield, wherein the lower plug shield is attached to the first shield conductor by a first pair of shield crimp wings, wherein an extreme end of the first pair of shield crimp wings is collocated with an extreme end of the first shield conductor, wherein the upper plug shield defines a first tab in direct and compressive contact with an outer surface of the first pair of shield crimp wings of the lower plug shield, and wherein the first pair of shield crimp wings is intermediate the first tab and the first shield conductor; and
a receptacle shield longitudinally surrounding the receptacle connector and electrically isolated from the receptacle terminals having an upper receptacle shield and a lower receptacle shield, wherein the lower receptacle shield is attached to the second shield conductor by a second pair of shield crimp wings, wherein an extreme end of the second pair of shield crimp wings is collocated with an extreme end of the second shield conductor, wherein the upper receptacle shield defines a second tab in direct and compressive contact with an outer surface of the second pair of shield crimp wings of the lower receptacle shield, and wherein the second pair of shield crimp wings is intermediate the second tab and the second shield conductor;
wherein the upper plug shield defines a first pair of opposed tabs in direct and compressive contact with the first pair of shield crimp wings of the lower plug shield, wherein the first pair of shield crimp wings is intermediate the first pair of opposed tabs and the first shield conductor, wherein the upper receptacle shield defines a second pair of opposed tabs in direct and compressive contact with the second pair of shield crimp wings of the lower receptacle shield, and wherein the second pair of shield crimp wings is intermediate the second pair of opposed tabs and the second shield conductor.
2. The electrical connection system according to claim 1 , wherein the extreme end of the first pair of shield crimp wings is in a range of 1.0 to 1.5 millimeters from first and second attachment points and wherein the extreme end of the second pair of shield crimp wings is in a range of 1.0 to 1.5 millimeters from third and fourth attachment points.
3. The electrical connection system according to claim 1 , wherein the plug shield is configured to slideably engage the interior of the receptacle shield.
4. The electrical connection system according to claim 1 , wherein the extreme end of the first pair of shield crimp wings is substantially flush with the extreme end of the first shield conductor and wherein the extreme end of the second pair of shield crimp wings is substantially flush with the extreme end of the second shield conductor.
5. The electrical connection system according to claim 1 , wherein the first plug terminal includes a planar first connection portion characterized by a generally rectangular cross section and a first attachment portion attached to the first electrical conductor and wherein the second plug terminal includes a planar second connection portion characterized by a generally rectangular cross section and a second attachment portion attached to the second electrical conductor, wherein the first and second plug terminals form a first mirrored terminal pair having bilateral symmetry about a longitudinal axis; wherein the first receptacle terminal includes a third attachment portion attached to the third electrical conductor and a first cantilever beam portion characterized by a generally rectangular cross section defining a convex first contact point depending from the first cantilever beam portion, said first contact point configured to contact the first connection portion of the first plug terminal, wherein the second receptacle terminal includes a fourth attachment portion attached to the fourth electrical conductor and having a second cantilever beam portion characterized by a generally rectangular cross section defining a convex second contact point depending from the second cantilever beam portion, said second contact point configured to contact the second connection portion of the second plug terminal, wherein the first and second receptacle terminals form a second mirrored terminal pair having bilateral symmetry about the longitudinal axis and wherein when the plug connector is connected to the receptacle connector, the major width of the first connection portion is substantially perpendicular to the major width of the first cantilever beam portion and the major width of the second connection portion is substantially perpendicular to the major width of the second cantilever beam portion.