A Simple Mom Loading Technique Used in Microstrip Circuits

Abstract

This paper presents a simple method of moment (MoM) technique to deal with an arbitrary load of a microstrip line. The loading condition of the microstrip line is equivalent to adding a loading voltage element to the excitation voltage vector in the MoM. Since the loading voltage satisfies Ohm's law, the voltage can be represented by product of unknown currents and given loads. Alter half-basis functions are introduced at the input port and loading end, for all the impedance elements of the MoM matrix, only the elements involved by the half-basis functions need to be changed. The results of current and voltage on the microstrip line terminated with arbitrarily impedance calculated by the MoM agree well with the ones by transmission line analysis.