Efficient Design Optimization of UWB Antennas Using Cauchy Approximation and Space Mapping

Design of UWB antennas is a challenging task due to the lack of systematic design procedures. On the other hand, high computational cost of EM simulation of antenna structures makes a direct EM-based optimization impractical. There has been some tendency to use global optimization methods such as genetic algorithms [1] or particle swarm optimizers [2] in antenna design. Although these methods alleviate some of the difficulties of the traditional, gradient-based techniques (e.g., allow handling multiple local optima), they are characterized by huge computational overhead.