Space Mapping Optimization of Handset Antennas Considering EM Effects of Mobile Phone Components and Human Body

摘要

To meet antenna design specifications under realistic conditions, electromagneticrncoupling effects between the antenna and its environment must be considered. In thisrnwork, an efficient antenna design optimization methodology that considers the influence ofrnthe human head and main mobile handset components on the antenna performance is presented.rnThe computational optimization time is dramatically reduced by exploiting arnBroyden-based input space mapping (SM) algorithm. Both coarse and fine models requiredrnfor the SM algorithm are based on the finite-element method and are implemented in thernsame simulator; simplifying the modeling process. However, our coarse model does not considerrnany object of the actual operational environment. In spite of that and other simplificationsrnapplied to the coarse model, the proposed optimization scheme is able to find arnsolution that meets the specifications in a realistic environment by performing an extremelyrnsmall number of expensive fine model simulations. Our practical illustration opens up thernfeasibility of using this CAD methodology to optimize other RF devices that operate in closernproximity to objects that affect its desired response, as it is the case for many wearablerndevices.