Abstract
A Franklin array antenna is proposed in this work to be used for wireless charging applications. It is a fascinating idea to use radio waves as the power source for portable devices. However, due to the relative long wavelength, the power density of microwave radiation dilutes as it propagates. According to power budget analysis, at a distance of one meter, if transmitting and receiving antennas of moderate gains are used, only a few mW is available with a one watt transmitter. In order to enhance the available power level and increase the remote operation distance, larger antennas, which intercept more radiated power, can be employed. In this work, a rectenna made of a high gain Franklin array and RF-to-DC rectifler was developed. RF-to-DC power conversion e-ciency was evaluated.
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