New expression for the resonant frequency of rectangular microstrip antenna using genetic algorithm and effective parameters

In this work, the cavity model for simple rectangular microstrip antenna is extended with some modifications to performing the resonant characteristics of the antenna. The cavity model in conjunction with the genetic algorithm is using for the design of rectangular microstrip antenna. Furthermore, the results present in this paper, are comparing with those presented elsewhere. Finally the effect of the different parameters of the rectangular antenna on the resonant characteristics is also investigated for fundamental and higher order modes