Multiobjective Optimization Design of Aperture Illuminations for Microwave Power Transmission via Multiobjective Grey Wolf Optimizer

In microwave power transmission (MPT) applications, the problem of maximizing the transmission efficiency has been extensively studied. However, to reduce costs, the power transmission capacity needs also to be considered. Moreover, to ensure safety, the peak radiation level at the edge or outside the rectenna must be taken into account either. To deal with these problems simultaneously, a multiobjective optimization design method of aperture illumination for MPT is proposed. Subsequently, a multiobjective grey wolf optimizer is developed and employed to solve the formulated problem. This new design approach provides antenna engineers with a set of tradeoffs among multiple goals, and therefore, the best compromise can be selected for a given application. To verify the effectiveness of the proposed method, numerical experiments on continuous aperture with different Fresnel parameters are conducted first. Then, the obtained results are applied to a space solar power satellite model, which demonstrates the validity of the proposed method. Finally, the effectiveness of the proposed method is further confirmed via numerical experiments on array antennas.