Equivalent Circuit Representations of Impedance and Admitance

This book chapter presents the following: the concept of waveguide input impedance (and admittance); impedance-admittance relationships of a waveguide to those of simple series and parallel circuits which present equivalent impedance (or admittance) at a given frequency; series-circuit representations of impedance and equivalent parallel-circuit representations of admittance on conventional Smith chart coordinates; parallel-circuit representations of impedance and series circuit representations of admittance on an alternate form of the Smith chart; Smith chart overlay for converting a series-circuit impedance to an equivalent parallel-circuit impedance, and a parallel circuit admittance to an equivalent series-circuit admittance; impedance or admittance magnitude and angle overlay for the Smith chart; and graphical combination of normalized polar impedance vectors.