Abstract
The effect of lossy short-circuiting plungers in permittivity measurements involving variable line lengths is discussed. It is shown that, in some cases, neglecting the resistive component of such plungers can lead to errors as high as 20% for the dielectric loss. Tables are given which allow the rapid calculation of the complex permittivity by measuring the plunger resistance and the real input impedance or admittance. Error curves drawn for a special case allow the correction of measurements already made providing the plunger resistance is known.
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