A reconfigurable class-F radio frequency voltage doubler from 650 MHz to 900 MHz for energy harvesting applications

This paper presents a reconfigurable high efficiency, high output voltage, and multiband class-F radio frequency (RF) voltage doubler and two stages voltage doubler rectifiers for energy harvesting applications using RO4003C substrate. The proposed voltage-doubler circuits are suitable for multi-band LTE, IoT, WSN, UHF ISM 900 MHz, GSM 900, energy harvesting, and multi-standard applications. The voltage doubler circuits are implemented using the Schottky diode (HSMS2852). Also, the voltage-doubler circuits are optimized and refabricated to recompense the unwanted parasitic and achieve the required performance. The voltage doubler and two stages voltage doubler rectifiers have a measured efficiency exceeding 40% in the frequency band from 650 MHz to 900 MHz at-10dBm input power and a load resistance of 10kohm, 22kohm, and an output voltage of 1 V at-10dBm input power. The proposed class-F RF voltage doubler achieves maximum efficiency of 72%, saturated output voltage equals 3.5 V, and the efficiency equals 51% at-10dBm input power. On the other hand, the proposed class-F two stages RF voltage doubler has a peak efficiency of 54%, saturated output voltage equals 6.5 V at 4dBm input power, and the efficiency equal 38% at-10dBm input power. Finally, the PCB areas of the proposed voltage-doubler and two stages voltage-doubler equal 2.8cm(2)and 3.6 cm(2), respectively. (C) 2022 THE AUTHORS. Published by Elsevier BV on behalf of Faculty of Engineering, Alexandria University This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/ licenses/by-nc-nd/4.0/).

Automated summary

This paper presents a reconfigurable high efficiency, high output voltage, and multiband class-F RF voltage doubler and two stages voltage doubler rectifiers for energy harvesting applications. The voltage doubler circuits are optimized and refabricated to achieve efficiencies exceeding 40% and desired output voltage and power at different frequencies.