Directional coupler for differentially driven twisted line

Details Directional coupler for differentially driven twisted line Directional coupler for differentially driven twisted line

1993-05-20

1994-12-27

Pascal, Robert J.

Wave transmission lines and networks

Plural channel systems

333116, 370 851, H01P 518

Patent

active

053769040

ABSTRACT:
An interface for differentially driven twisted pair cable provides for inductive and capacitive coupling of a differential drive signal to respective conductors of the twisted pair. Two input tracks have a terminating resistor at a far end whose value equals the characteristic impedance of the respective track. An output track having two branches provides connection at the near end to the twisted pair cable, the far ends being connected by a terminating resistor whose value is equal to the impedance of the twisted pair cable. The output branches parallel the input tracks for a coupling length L.sub.C.

REFERENCES:
patent: 3619504 (1971-11-01), Olney et al.
patent: 3748601 (1973-07-01), Seidel
patent: 4423392 (1983-12-01), Woltson
"Meander-Folded Coupled Lines" IEEE Transactions on Microwave Theory and Techniques vol. MTT-26 No. 4 Apr. 1978 pp. 225-231.

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