An optimized shaped Yagi-Uda array using the genetic algorithm

The performance of a shaped, three-element Yagi-Uda antenna is improved by using a genetic algorithm (GA) in conjunction with the method of moments code NEC2 for maximum gain. To carry out the scheme of this algorithm, the length, wire angles and spacing of the elements are all included in the design parameters and encoded by a string of binary bits. The results show that a simple, Vee-shape, Yagi-Uda array can achieve markedly increased directivity without the need for elaborate element curvature.