Space Mapping with Co-Simulation Coarse Model for Accurate Modeling of Microwave Structures
Slawomir Koziel
School of Science and Engineering Reykjavik University, Iceland
Accurate modeling of microwave devices is important in many areas including signal processing, wireless communication and biomedical engineering. Although high accuracy can be obtained using full-wave EM simulation, CPU cost of EM-based models is usually unacceptable, particularly for direct statistical analysis and parametric optimization. Approximation techniques, e.g., kriging [1] and neural networks [2] are fast but can only ensure reasonable accuracy if a large number of training points is involved. Space mapping (SM) [3] allows an engineer to create fast ad hoc surrogate models suitable for design optimization and statistical analysis. SM surrogate is constructed using a simplified representation (coarse model) of the structure under consideration (fine model) and auxiliary mappings that “reshape” the parameter space of the coarse model. Accuracy of SM is limited by the quality of the coarse model, typically an equivalent circuit. Here, an improvement of the standard SM is proposed by constructing the coarse model using co-simulation [4]: the essential couplings of the structure under consideration are evaluated using EM solver and the designable parameters of interest are modeled by distributed circuit components. It is demonstrated that the presented methodology allows us to create more accurate surrogate models when compared to the standard SM.
IEEE Antennas and Propagation Society International Symposium (APSURSI)
2010
July
Due to copyright restrictions articles are not available for download. They are however indexed on this site and search results will therefore correctly indicate if such terms are present in the articles.
