A new modeling methodology for passive components based on black-box augmentation combined with equivalent circuit perturbation

A new black-box augmentation methodology for broadband CAD modeling of interconnects and passive elements is presented. The new methodology is based on augmenting an existing equivalent circuit model with a black-box network described with rational polynomial functions while allowing perturbation of the equivalent circuit component values. The approach incorporates the accuracy of black-box modeling while simultaneously preserving the intuition that circuit designers obtain from a ´hand-engineered´ equivalent circuit. Exemplary results are shown to illustrate the benefits and accuracy of the method.