Bidirectional non-solid impedance controlled reference plane req

Details Bidirectional non-solid impedance controlled reference plane req Bidirectional non-solid impedance controlled reference plane req

1996-03-25

1997-10-07

Gensler, Paul

Wave transmission lines and networks

Plural channel systems

333238, H01P 308

Patent

active

056752997

ABSTRACT:
A circuit board includes a plurality of signal conductors and a grid. The grid has a pattern of conductive material which forms cell structures oriented along a first axis. The grid pattern is configured so that when the signal conductors are oriented parallel to a first axis they overlay a substantially constant area of the conductive material regardless of where the signal conductors are positioned. The capacitance of the signal conductors is thereby controlled so that the impedances of the signal conductors can be maintained at a high level.

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Cross-Hatched Ground Plane, IBM Technical Disclosure Bulletin, vol. 33, No. 4, Sep. 1990, pp. 155-156.
Drawing of Parlex cable BNR NT4K1232 having 12 mil lines on mil centers (Sep. 30, 1992).
Drawing of Parlex cable BNR NT4K1232 having 10 mil lines on 20 mil centers (Sep. 30, 1992).
Drawing of Parlex cable BNR NT4K1234 having 12 mil lines on 25 mil centers (Sep. 30, 1992).
Copies of four layers of M-flex cable (1982-1983).
Drawing of Parlex microstrip cable.
Enlarged drawing of portion of Parlex microstrip cable.
Photocopy of Mektec flexible cable.
Photocopy of of Sheldahl flexible cable.
Photocppy of M-Flex flexible cable.

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