Design of radio frequency energy harvesting system for an unmanned airplane

2011 
Energy harvesting is a promising technique that can be used to drive various sorts of passively powered devices [1]. Viable energy sources include wind, sunlight, thermal energy, radio waves, mechanical vibration and so on. As an energy source existing ubiquitously in our environment, radio frequency (RF) energy harvesting has the potential to be widely applied. In this work, an RF energy harvesting system is described for the purpose of driving an unmanned airplane. Eventually, the airplane will be capable of remote recharge and become a self-powered system.
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