Convergence Study and Numerical Kernel Settings in Microstrip Patch Antenna Simulations
A demonstration example of convergence study of calculated S-parameters was presented in this application note. The convergence study relates to simulations using WIPL-D Pro CAD, which is a full wave 3D electromagnetic Method-of-Moments based software. The EM model used for demonstrational purposes is a microstrip patch antenna operating around 2.40 GHz. All the conclusions derived here can be directly applied to many EM components operating in this widely exploited frequency band.
The application note covered a convergence study of the results on the model which can be considered as a sample of widely simulated modest\lower electrical size EM models. This convergence study was based on proper increasing of Integral accuracy and Reference frequency parameters. Also, the application note contains a recommendation for applying Edge-ing in printed structures simulations.
It was shown that changing numerical settings can improve the convergence of the output results. Thus, it is highly recommended to be performed. It was also shown that optimal numerical kernel settings should be exploited, since changing of numerical settings increases simulation time and number of unknowns which becomes very important when working with electrically large or detailed models.