숙명여자대학교 로고숙명여자대학교 창의융합연구소창의융합연구소

In Wire-less Power Transmission (WPT) reducing the aperture size of receiving station, increasing the concentration ratios and decreasing the effect of side-lobe levels much of the concern has been related with Antenna pattern Optimization problems. Here, in this paper we have introduced a novel optical approach that could be used to curb these problems. In our approach, the generated radiated Radio Frequency beam is made to travel through a unique and specially designed Ultra-large Fresnel Array (UFA) that focuses the radiated RF beam from the RF transmitter to the receiver/Rectenna. The aperture size of the receiver/Rectenna remains the function of Focal length (f) & aperture size (AT) of the UFA, and the distance (L) between UFA and Rectenna. In general, the basic design considerations of the UFA and its cost-effective impact to the space-based power systems in future is described here. The case of 1979 Reference concept from NASA/DOE studies is also used here to demonstrate how the aperture size of receiving station would get reduced with the help of this UFA. The approach has the potential to be used in areas of space applications including SSPS and earth observation radiometry.