The proposed rectenna achieved a
comparatively high realized gain (4 dBi) and good RF to DC
conversion efficiency (up to 70%). With these specifications,
the rectifier harvested enough energy to turn on a 1.6V LED
from 3.1 meters and to turn on a commercial RFID sensor from
2.1 meters using a commercial RFID reader for excitation (4W
EIRP at 2.45 GHz ISM band)