Equivalent circuit models for computer aided design of microstrip rectangular structures

Microstrip rectangular structures are modeled in terms of equivalent circuits in order to overcome many of the drawbacks and limitations of previously proposed approaches and the poor accuracy still introduced by most of the presently available models. Through a successful electromagnetic approach, lumped element models for interacting and noninteracting step discontinuities have been created and tested. An alternative model is also proposed to account for shunt connected double and single stubs in cross and tee junction with the main line, respectively. The different models have been tested on the same structure to demonstrate their congruency