This Brief reviews a number of techniques exploiting the surrogate-based
optimization concept and variable-fidelity EM simulations for efficient
optimization of antenna structures. The introduction of each method is
illustrated with examples of antenna design. The authors demonstrate the
ways in which practitioners can obtain an optimized antenna design at
the computational cost corresponding to a few high-fidelity EM
simulations of the antenna structure. There is also a discussion of the
selection of antenna model fidelity and its influence on performance of
the surrogate-based design process. This volume is suitable for
electrical engineers in academia as well as industry, antenna designers
and engineers dealing with computationally-expensive design problems.