Before revision: Writing out the expression for input impedance gives; and solving for Zi 1, Zi 2 is found by a similar process, but it is simpler to work in terms of the reciprocal, that is image admittance Yi 2, Also, it can be seen from these expressions that the two image impedances are related to each other by; Directly measuring image impedance by adjusting terminations is inconveniently iterative and requires precision adjustable components to effect the termination.
After revision: MeasurementWriting out the expression for input impedance gives; and solving for Zi 1, Zi 2 is found by a similar process, but it is simpler to work in terms of the reciprocal, that is image admittance Yi 2, Also, it can be seen from these expressions that the two image impedances are related to each other by; Directly measuring image impedance by adjusting terminations is inconveniently iterative and requires precision adjustable components to effect the termination.