Experimental Investigation of a Novel Multi-Patch Fractal Antenna for Radio Frequency Energy Harvesting

We propose a new multi-patch antenna for radio frequency energy harvesting. The designed antenna can scavenge more power from ambient with improved gain and directivity. The proposed antenna uses FR4 substrate of 1.6mm thickness. This design efficaciously radiates at 900 MHz frequency with the high return loss of −64dB. The new design is showing a peak gain of 36dB with considerable VSWR(<2). This antenna shows a capability of harvesting energy from GSM band and covering the wide range frequency of 2.9-4 GHz including Wi-MAX. Experiments are conducted to obtain the return loss and radiation pattern. Also, measurements conducted show an radio frequency to DC conversion voltage of 100mV. Experimental results obtained are in compared with the simulated results and are closely matching.