Optimization of the spiral inductor with EBG via FDTD and GA

A new approach to improve the Q value of the spiral inductor is proposed. Full wave Finite Difference Method in Time Domain(FDTD) is used to analyse the non-uniform current distribution arousing from the increasing number of turns of the spiral inductor. The Electromagnetic Bandgap(EBG) hole structure is utilized to suppress the surface wave and mitigate the eddy effect for the spiral inductor with many turns. Subsequently, Genetic Algorithms(GA) together with FDTD is applied to optimize the spiral inductor for a high Q value, which has been proved to be an effective method for the design of microwave circuits.