Near-Field Wireless Power Transmission Efficiency Based on Time Reversal Technique

Power Transmission Efficiency (PTE) between transceiver antennas is one of the most significant parameters to characterize the performance of indoor near-field Microwave Power Transmission (MPT) systems. Time Reversal (TR) has been used in MPT systems as an efficient wireless power transmission technology. In this paper, the optimal solution of PTE is derived based on TR and the reciprocity theorem. At the same time, the advantages of TR over traditional MPT methods such as pattern synthesis and phase compensation methods in near-field wireless power transmission are compared based on electromagnetic full-wave simulation technology. Theory and simulation show that TR can achieve the highest PTE in the near-field region of the antenna.