Analysis of the Influence of Roughness on the Propagation Constant of a Waveguide via Two Sparse Stochastic Methods

The aim of this contribution is to study the effect of roughness on the propagation constant in interconnect structures. For this purpose, a stochastic framework is constructed around a full-wave electromagnetic field solver. To reduce the number of repeated calls to the full-wave simulator, two sparse stochastic techniques have been implemented and tested. A balance between calculation time and accuracy is sought for and found, which is demonstrated for a rough rectangular waveguide.