Abstract
This study demonstrates an efficient 5.8 GHz microwave wireless power transmission (MWPT) system. The whole system comprises a transmitting subsystem and a receiving subsystem. A 64-way phased microwave power source and a transmitting antenna array of 1 m × 1 m are included in the transmitting subsystem. By exciting the transmitting array with a 10-dB Gaussian amplitude distribution and a quadratic phase distribution via the phased microwave power source, the transmitting subsystem radiates a low side-lobe and focused microwave beam. The receiving subsystem comprises a receiving antenna array of 0.5 m × 0.5 m and 64 rectifiers. The efficient receiving antenna array and rectifiers realize an efficient rectenna array. An experiment on the MWPT system is conducted. The total microwave power output from the source is 24 W, and the transmission distance is 10 m. According to the measurements, the total rectified direct current (DC) power is 4.58 W, and the overall RF-DC efficiency is 19.08%.
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