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One-side automated discrete impedance matching scheme for wireless power transmission

In order to avoid impedance mismatch caused by spatial movement of the receiver in a wireless power transmission (WPT) system using coupled magnetic resonance (CMR), an impedance matching network (IMN) can be added between the power source and transmitter. In this paper, we propose an automated impedance matching system based on L-type IMN and analyze its effectiveness under various receiver locations. An experiment is conducted to validate the proposed method, and the results show that the designed system can efficiently respond to the spatial movement of the receiver and automatically construct the respective IMN to enhance power transmission efficiency.