Optimization of dual-band notched UWB Trapezoidal Antenna using Genetic Algorithm Approach

Genetic algorithm (GA) optimization is applied to design an Ultra-wideband UWB-CPW-fed Trapezoidal with a dual-band frequency notch. A two-dimensional (2-D) matrix chromosome is used in the GA to represent a wide-range on planar trapezoidal element. It is shown that the GA generates antenna designs exhibit equal wideband performance defined by VSWR<;2, ranging from 3.1 to 13.66 GHz (an impedance bandwidth of 126%), with a good dual-band-notched performance in the 5 GHz (WLAN band) and 7.2 GHz bands (ITU satellite communication systems). The GA-generated antenna shows almost omnidirectional radiation patterns and a good gain in the whole UWB range except at notched bands.