A multi-band rectifier with modified hybrid junction for RF energy harvesting

This article presents a novel multi-band rectifier utilizing modified hybrid structure for radio frequency (RF) energy harvesting. The proposed multi-band rectifier consists of a modified hybrid junction and three rectifying branches. The rectifying branches are placed inside the modified hybrid to reduce the layout size. The proposed multi-band rectifier is designed for GSM-1800, UMTS-2100, and Wi-Fi bands. Measured peak efficiency of the proposed rectifier reaches 61.7% at 9 dBm input power level. The results show a good overall performance on operation bands, efficiency, output voltage, and layout size. The proposed rectifier can be used for various RF energy harvesting applications, especially in the multi-source condition.