A Novel Wideband Circularly Polarized Antenna for RF Energy Harvesting in Wireless Sensor Nodes

Figure 12

(a) RF-DC conversion efficiency versus input power level at 5.82 Ghz with the load of 3.9 kΩ. (b) Voltage output versus input power level at 5.82 Ghz with the load of 3.9 kΩ.

(a)

(b)