A simple way to determine the driving-point impedance function of an n port

It is well known that the driving-point impedance at any port of an n port can be written as a function of the load impedances across the other
(n - 1)
ports and that this function is a quotient of two polynomials in the load impedances. A method is given to determine the coefficients of these polynomials with one impedance-measurement on the n port plus one multiplication per constant.