Robust and Optimal Feed Excitation Design of Transmitting Arrays for Microwave Power Transmission

This study proposes a robust optimization design method for ensuring high efficiency and reliability in microwave power transmission (MPT) applications, considering feed excitation errors within transmitting arrays. The method is based on particle swarm optimization (PSO) with absorbing boundary and worst case sensitivity analysis (WCSA). An optimization model was developed to find robust feed excitations with a maximum tolerance range (TR). The model comprises the main optimization model, which finds nominal solutions, and the WCSA model, which evaluates the robustness of the nominal solutions. Numerical experiments were performed, focusing on the mutual coupling effect on different transmitting array and rectenna array configurations. The effectiveness of the proposed method was verified through Monte Carlo simulations. The results demonstrated that the optimal design is 100% feasible within the established maximum TR. This study advances the theoretical understanding of robust feed excitations for MPT and provides practical solutions for reliable and efficient MPT systems in diverse scenarios.