Full-wave analysis and equivalent circuit modeling of substrate integrated waveguide (SIW) circuits

The modeling and design of substrate integrated waveguide (SIW) circuits requires sophisticated electromagnetic solvers, which provide reliable results, fast computing time, and high flexibility to fully exploit the potential of SIW technology. This paper presents the outline of the full-wave analysis of SIW circuits by the Boundary Integral-Resonant Mode Expansion (BI-RME) method. In addition, the derivation of multimodal and parametric equivalent circuit modeling of SIW discontinuities. The use of equivalent circuit models is particularly useful for the fast design of SIW circuits, as well as for the sensitivity and yield analysis.