Accurate consideration of ohmic losses in passive waveguide circuits for microwave and millimeter-wave applications

The accurate consideration of all ohmic losses effects in waveguide devices is rigorously studied in this paper. For such purposes, a full-wave CAD tool based exclusively on modal methods is originally proposed. Proceeding in this efficient way, losses are precisely considered in all common components of such complex devices, i.e. planar junctions, uniform lines and multi-port circuits implemented in waveguide technology. For verification purposes, we have successfully compared our results for an LMDS filter, an H-plane T-junction and a manifold diplexer with experimental and numerical results