Abstract
This paper presents a retrodirective antenna(RDA)-based wireless power transmission system design method using link budget analysis. The simulation and measurement results demonstrate the feasibility of this method. The system can transmit a power signal by adaptive beamforming toward the power receiver. The system should be designed considering various factors from the pilot signal generation to the rectified power signal reception. Through this design method, the system can achieve the target distance and efficiency required for wireless power transmission. This study confirms the characteristics of the radio frequency-to-direct current rectifier used in the link budget analysis through a simulation. The measurement results indicate that the total antenna gain required can be effectively achieved by the design method using multiple antenna modules. In other words, the link budget analysis can be used to effectively design an RDA-based wireless power transmission system.
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