Impedance bandwidth optimization of double slots circular patch antenna using genetic algorithm and the Interface Fuzzy Logic

A modified circular patch antenna design has been proposed in this paper, thebandwidth of this antenna is optimized using the genetic algorithm (ga) based on fuzzydecision-making. this design is simulated with hp hfss program that based on finite elementmethod. this method is employed for analysis at the frequency band of 1.4 ghz- 2.6 ghz. itgives good impedance bandwidth of the order of 15.5% at the frequency band of 1.67ghz-1.95ghz and 10.6% at 2.23ghz- 2.48ghz. it means that impedance bandwidth increases above4.9% than the impedance bandwidth of ordinary circular patch antennas and band width risefrom 1.78ghz- 1.98ghz (10.6%) to 1.67ghz- 1.95ghz (15.5%) and 2.23ghz- 2.48ghz(10.6%). the antenna fabricated with two slots on circular patch antenna. the measured resultsof the optimized antenna validate a high compatibility between the simulation and themeasurements.