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Method for determining the complex impedance of an arbitrary load

DOI 10.18127/j20700784-201812-17

Keywords:

V.S. Panko – Ph.D. (Eng.), Associate Professor, Siberian Federal University (Krasnoyarsk)
E-mail: vpanko@sfu-kras.ru
K.V. Lemberg – Ph.D. (Phys.-Math.), Associate Professor, Siberian Federal University (Krasnoyarsk)
E-mail: klemberg@sfu-kras.ru
Y.P. Salomatov – Ph.D. (Eng.), Professor, Head of Department, Siberian Federal University (Krasnoyarsk)
E-mail: ysalomatov@sfu-kras.ru


A way for determining the complex impedance of an arbitrary load is described. A load is supposed to be connected to a transmission line. It is shown by means of Smith chart that two measurements of the reflection coefficient modulus are sufficient for adetermination of impedance. Then the known active resistance is to be connected in series to the load and the measurement is repeated. Formulas are given that allow us to calculate the complex impedance from the data obtained by measurements.

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