NI AWR Design Environment/Axiem EM co-simulation with Modelithics models

Combining high accuracy parasitic models with accurate electromagnetic (EM) analysis is not necessarily straightforward. Modelithics Global Models, which account for many different parasitic and substrate related effects, and NI AWR Design Environment/AXIEM EM analysis tool have been developed independently with the same goal of increasing designer success. This work outlines a best-practice procedure for using these tools together. In addition, a comparison of simulated to measured data for an example filter will be covered. The data shows that good results can be achieved within a circuit simulation, by using parasitic models combined with built-in transmission line elements; however, even better results are achieved by adding an EM analysis of all the interconnect effects.