RJ-45 modular connector with microwave-transmission-line integra

Details RJ-45 modular connector with microwave-transmission-line integra RJ-45 modular connector with microwave-transmission-line integra

1998-04-01

1999-10-26

Abrams, Neil

Electrical connectors

With insulation other than conductor sheath

Plural-contact coupling part

439941, H01R 2302

Patent

active

059718137

ABSTRACT:
A modular connector comprises an insulative housing that accepts an RJ-45 style jack from its front, and a molded insert from the opposite side. Each molded insert includes a signal conditioning circuit that provides a proper electrical coupling between a physical interface device (PHY) or encoder/decoder and an unshielded twisted pair (UTP) cable to a high speed computer network. Such signal conditioning comprises a common mode choke for each of the transmitter and receiver circuit pairs that are constructed from twin-lead transmission line sections. Each common mode choke comprises two stiff wire conductors that are brought together at a uniform critical separation distance for a critical longitudinal run length. The wire size, surrounding dielectric, separation distance, and run length are all controlled to arrive at a common-mode choke equivalent with series inductance, transformer coupling, and capacitance values suitable for use with 100BASE-T Fast Ethernet and 1000BASE-T Gigabit Ethernet.

REFERENCES:
patent: 5069641 (1991-12-01), Sakamoto et al.
patent: 5295869 (1994-03-01), Siemon et al.
patent: 5362257 (1994-11-01), Neal
patent: 5474474 (1995-12-01), Siemon et al.
patent: 5587884 (1996-12-01), Raman
patent: 5647765 (1997-07-01), Haas et al.
patent: 5647767 (1997-07-01), Scheer et al.
patent: 5656985 (1997-08-01), Lu et al.
patent: 5687233 (1997-11-01), Loudermilk et al.
Stewart Connector, MagJack Modular Jacks with Integrated Magnetics, 72 Series, SCS-MJ-Nov. 1997.

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