Multi resolution TLM methodology

Initially modelling using Transmission line modelling method required meshes of equal size to model the power planes. However, to model power planes with small features accurately and efficiently multi-resolution power plane modelling is required. Fine meshes will model area where small features are present and coarse meshes will model area where small features are not present. In this paper, an interfacing model is derived for multi-resolution modelling by interfacing meshes of different resolution. The derived model is verified by modelling a test power plane. Results match closely till 12 GHz and peaks and nulls pattern nicely follow upto 20 GHz when modelled by coarse meshes of dimensions 1 mm by 1 mm and finer meshes.