| Summary: | Over the past decade, unmanned air vehicles are gaining more and more interest and popularity in particular miniaturized small flight objects named NAVs (Nano Air Vehicles). One of the main considerations when building or buying a drone is the flight time and range. The flight time is nowadays a drawback for miniature unmanned aerial vehicles (UAVs). It is limited to few minutes before requiring a forced recovery to replace exhausted batteries. Currently the batteries are the dominant technology, which possess limited operation in time and energy. The real viability to extending flight time (FT) of NAVs is possible exploring new and more disruptive alternative solution able either to recharge a battery, or even to directly power the NAVs during the flight. Plasmonic Nano Energy harvester is an attractive technology to extending the FT extracting the energy in mid-infrared radiation emitted from Earth’s surface with Rectenna tuned to mid-infrared wavelengths (7 –14 ) um with a peak wavelength of about10um . In this review the concepts emerging from this work identify and suggest how this novel harvester can constantly supply these flying objects for the whole day.
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