Displacement current in a uniform coaxial cable

A theoretical analysis is given which determines the displacement current w hich flows when a semi-infinite, uniform coaxial cable is driven by a sinus oidal voltage generator. By integrating over an appropriate quarter wavelen gth the displacement current is calculated and this is shown to be equal to the peak conduction current, independent of the frequency. Thus a role is always evident for the displacement current in a coaxial geometry.