Multiobjective Design Optimization of an Inverted-S Antenna

A dual-frequency band Inverted-S Antenna (ISA) using low profile PCB configuration is studied. As a great deal of tuning is involved in the design of an ISA to obtain an excellent performance, the synthesis of the ISA is formulated and solved as a multi-objective design problem by maximizing the bandwidth and minimizing the return loss at the resonant frequencies. To address the problem of the computationally heavy procedure of the finite element analysis in performance evaluations, a response surface model based on radial basis function is proposed.