Synthesis of networks simulating impedance of loaded cable facilities

This tutorial paper describes a procedure for designing a network that simulates the image impedance of a loaded cable. The problem is reduced to one of synthesizing three 2-terminal impedances, two at one frequency and the third at three frequencies. In general, the return loss performance of the network against the facility is greater than 30 db (decibels) over the frequency range from 0.006 to six times the cutoff frequency, and is greater than 40 db over most of the transmitted band. With the aid of artificial cable and a loading coil, such networks can be used to simulate both the transmission and impedance characteristics of any type of loaded cable facility having any fractional length of end section.