Chapter 4

The Transmission-Line Equations for Three-Conductor Lines

In Part II we investigate the prediction of crosstalk on three-conductor transmission lines. Crosstalk is the inadvertent coupling of a signal on one transmission line onto an adjacent transmission line, thereby having the possibility of creating interference in the modules that the adjacent line interconnect. In high-speed digital systems today, this has become a critical design problem preventing proper operation of those digital and analog systems. This is due to the electric fields E and magnetic fields H caused by the first line (the generator line) interacting with the second line (the receptor line), thereby inducing a voltage and a current in that line. The induced voltages at the ends of the receptor line are called the near-end and far-end crosstalk voltages, img and img, and can cause interference in the electronic devices that terminate the receptor line. In today's high-speed digital systems, crosstalk has become a very important factor in preventing them from working properly. Crosstalk is usually included under the general criterion of signal integrity.

4.1 The Transmission-Line Equations for Three-Conductor Lines

Figure 4.1 shows the general configuration of a three-conductor transmission line that we will ...

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