Chapter 8: Equipotentiality and Current Coupling on the Ground Surface
Let us start our discussion of the equipotentiality on grounded surface of a regular RF cable. Simply speaking, a regular RF cable is a conductive wire encircled by a conductive cylinder (Fig. 8.1). The outer cylinder at the two ends is usually connected as the ground terminal.
In the RF range, the following questions must be answered:
In the DC or low-frequency range, these points are, approximately, equipotential.
In the RF range, they are in most cases not equipotential, that is,
unless the distances between ...