Robust variable‐fidelity optimization of microwave filters using co‐Kriging and trust regions
Slawomir Marcin Koziel, Leifur Leifsson, Ivo Couckuyt, Tom Dhaene · Microwave and Optical Technology Letters · 2013
Abstract This work introduces a variable‐fidelity optimization methodology for simulation‐driven design optimization of filters. Our approach is based on electromagnetic (EM) simulations of different accuracy controlled by the mesh density. A Kriging interpolation model (the surrogate) is created using sampled low‐fidelity EM data and optimized to approximately locate the optimum of the high‐fidelity EM model of the filter. This initial surrogate is subsequently improved by blending in the high‐fidelity data accumulated during the optimization process using the co‐Kriging technique. The algorithm convergence is ensured by embedding it into the trust region framework. The operation and performance of our method is demonstrated using three filter design cases. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:765–769, 2013; View this article online at wileyonlinelibrary.com. DOI: 10.1002/mop.27447