A Generalized Finite-Gap Lumped-Port Model

A lumped-port model that improves network parameter extraction accuracy of integral-equation methods is presented. The model is a generalization of a recently introduced finite-gap model to the case where port terminals are of unequal length and the gap between the terminals is trapezoidal. It enforces line integrals of the electric field along straight (radial) paths in the gap to be equal to the port voltage and the total current conducted into/out of the gap to be equal to the port current. The port model is implemented by using novel divergence-conforming testing functions at the gap and scaled half-basis functions connected across the gap. Solutions of sample packaging problems show that the proposed model outperforms the traditional delta-gap lumped-port model for coaxial ports.