Design of IFS patch antenna using particle swarm optimization

Paper describes usage of the IFS (Iterated Function System) fractals employed as a planar microstrip patch antennas. To generate the IFS fractals, versatile tool named IFSMaker has been evolved. Efficient design of patches will be shown. After fractal pre-design, one can start to optimize the IFS collage by using the PSO algorithm. This procedure is managed by the PSOptimizer tool. Optimalization loop (which includes IFS generator, cavity model (CM) solver and PSO evaluation) works generally with any number of optimalization conditions. This feature is provided by IFSLimiter tool. Resonant frequencies (eigenvalue problem) are calculated with cavity model in Comsol Multiphysics environment. Finally we discuss the radiation pattern calculation and usage of theory of characteristic modes as well.