Abstract
This paper addresses different cases of radio frequency harvesting using different antenna types as 
 transmitting antenna but using just the lead of the capacitor as the wire antenna at the receiving end 
 with a voltage rectifier circuit. Different antennas were used in the input and with two different 
 rectification circuits the conversion efficiencies were studied accordingly. For a source of log periodic 
 antenna, without any antenna, 27.31% RF-DC power conversion efficiency value was obtained at the 
 far-field. For a source of half wavelength dipole antenna, at the near-field, 50.53% RF-DC power 
 conversion efficiency value was obtained. For a source of helical antenna, up to 5 cm distance about 
 14.78% RF-DC power conversion efficiency was observed. For the Yagi-Uda antenna used as a source, 
 RF-DC power conversion efficiency that was obtained at the far was 28.89% without any receiving 
 antenna..
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