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Low Noise, High Density, Connector for High Speed Shielded Coaxial Cable

IP.com Disclosure Number: IPCOM000037995D
Original Publication Date: 1989-Sep-01
Included in the Prior Art Database: 2005-Jan-31
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Johnson, RA: AUTHOR [+2]

Abstract

This connector is attached to a ribbon cable that has several equally spaced signal conductors, each with an outer coaxial shield that forms a ground conductor. In one step of attaching a connector to the end of the ribbon cable, the insulation is stripped back and individual contacts are bonded (welded or soldered) to the signal and ground conductors. In the assembled connector, the ground contacts and signal contacts are equally spaced apart and alternate along a line except that the ground wire that would otherwise be positioned at one end of the line is crossed over the associated signal conductor and joined with the next ground conductor. The contacts are assembled in a thin flat housing of suitable material with an encapsulant that provides strain relief.

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Low Noise, High Density, Connector for High Speed Shielded Coaxial Cable

This connector is attached to a ribbon cable that has several equally spaced signal conductors, each with an outer coaxial shield that forms a ground conductor. In one step of attaching a connector to the end of the ribbon cable, the insulation is stripped back and individual contacts are bonded (welded or soldered) to the signal and ground conductors. In the assembled connector, the ground contacts and signal contacts are equally spaced apart and alternate along a line except that the ground wire that would otherwise be positioned at one end of the line is crossed over the associated signal conductor and joined with the next ground conductor. The contacts are assembled in a thin flat housing of suitable material with an encapsulant that provides strain relief.

A multi-layer circuit board has inserts that are adapted to receive the individual contacts. A conductive plate on or near the upper surface of the circuit board has a line of rectangular openings, and the inserts are force fitted into the openings. The inserts for the ground contacts are conductive and electrically contact the ground plane plate. The inserts for the signal contacts are non- conductive, and the signal contacts pass through the ground plane plate and engage mating electrical contacts that are connected to wiring layers inside the board.

The board has several lines of inserts in a rectangular array, and several connecto...