Chapter 9: Multi-Objective Optimization of Antenna Structures: Application Case Studies

The purpose of this chapter is to demonstrate the operation and performance of the surrogate-assisted multi-objective optimization procedures formulated in Chapters 7 and 8. The numerical studies included here are very comprehensive and contain nine antenna structures of various levels of complexity. For some of the test cases, numerical results are supported by experimental data. The number of geometry parameters ranges from five to 24. The considered design objectives include reflection response, antenna size (footprint area or volume), antenna gain, as well as radiation pattern. In vast majority of cases, two-objective problems are solved, which is the most typical situation, especially for compact antennas, where the trade-offs between the antenna size and its electrical performance (specifically, the maximum in-band reflection level) are sought. There are several antenna types considered in this study, including ultra-wideband (UWB) monopoles, planar Yagi antennas, a dielectric resonator antenna, as well as a UWB multi-input multi-output (MIMO) structure…