Extraction of parametric circuit models from scattering parameters of passive RF components

We present a new algorithm for generating passive parametric models of microwave devices from their sampled scattering responses. The proposed formulation supports a parameterization of model poles and preserves the stability and passivity of the original device for any parameter value. These combined features lead to significant improvements with respect to the state of the art. Application examples show the effectiveness of the method in modeling multiport microwave devices.