Twinax coaxial flat cable connector assembly

Details Twinax coaxial flat cable connector assembly Twinax coaxial flat cable connector assembly

2000-10-19

2001-08-14

Sircus, Brian (Department: 2839)

Electrical connectors

Including or for use with coaxial cable

Having means for interconnecting outer conductors of three...

C439S497000, C439S607070

Reexamination Certificate

active

06273753

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to a cable connector assembly, and particularly to a twinax coaxial flat cable connector assembly for use with a digital panel or LCD (Liquid Crystal Display).
BACKGROUND OF THE INVENTION
A conventional flat cable connector assembly is used for connecting two electrical devices separated from each other a relative long distance. The assembly has a flat flexible cable having a plurality of conductors therein for transmitting signal. The conductors are connected with respective terminals of connectors of the assembly. As transmitting speed is increased between the electrical devices, a flat coaxial cable is used for transmitting high speed signal. The flat coaxial cable comprises a plurality of parallel and equally spaced signal transmission lines, each line being constructed by a micro coaxial cable consisting of a central conductor, a layer of insulation surrounding the conductor, a metal braid surrounding the insulation and a jacket surrounding the metal braid as disclosed in U.S. Pat. No. 6,123,582 and the copending application Ser. No. 09/350,942 filed Jul. 9, 1999. Although such design can avoid cross talk between neighboring two lines, it still has a relatively large electrical skew, failing to meet the electrical performance requirements. Hence, an improved coaxial flat cable connector assembly is required to overcome the disadvantages of the presently used flat cable connector assemblies.
BRIEF SUMMARY OF THE INVENTION
A first object of the present invention is to provide a coaxial flat cable connector assembly which can minimize electrical skew of the assembly to meet the electrical performance requirements.
A second object of the present invention is to provide a twinax coaxial flat cable connector assembly having an improved insulative insert for positioning and holding the twinax coaxial conductors to meet functional requirements.
A third object of the present invention is to provide a twinax coaxial flat cable connector assembly having an improved shielding effect.
A twinax coaxial flat cable connector assembly in accordance with the present invention comprises a plurality of twinax coaxial wires, an insulative insert, a plurality of terminals, a housing, a grounding bar, and an EMI shield. Each twinax coaxial cable includes a pair of coaxial conductors, an insulating layer isolating the pair of conductors from each other, a metal braid layer enclosing the insulating layer, and a cable jacket enclosing the metal braid layer. The elongate insulative insert defines a plurality of channels, a plurality of slots each with a pair of projections and a groove, and an elongate slot connecting the channels with the slots. In assembly, the channels position the jackets of the twinax coaxial cables, each groove secures a rear portion of a corresponding terminal, each coaxial conductor is secured between a corresponding pair of projections and electrically connects with a corresponding terminal, and the grounding bar is inserted into the elongate slot to electrically connect to the metal braid layer of all the twinax coaxial wires. The shield is assembled to the outside of the housing and the insert is assembled into the housing such that the shield electrically contacts the grounding bar in the insert. Thus the improved insert securely positions and holds the coaxial conductors and the shielding effect is improved.


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