A new application of a genetic algorithm (GA) for the design of a coaxially fed circularly polarized rectangular microstrip antenna is presented. The GA shows excellent results for the design of microstrip antennas that have a very complicated objective function, including the input impedance, the effective loss tangent, and the axial ratio. The objective function is derived from the cavity model, and we optimize the size and the feeding point of the antenna using the GA. The experimental results show good agreement with the simulated results.
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Lee et al. (2000) studied this question.
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