Analysis of rectifier stage number and load resistance in an RF energy harvesting circuit

Abstract

In this study, a single‐stage and three‐stage Dickson rectifier circuits that would be able to perform RF energy harvesting were proposed. Operating frequency was selected as 1 GHz. The highest efficiency value was obtained at 7 dBm input power. The load resistance values for the input power were parametrically analyzed and the power conversion efficiency and output voltage were calculated. In the cases where the best performance was obtained, while a maximum power conversion efficiency of 70.5% was obtained in the single‐stage Dickson circuit, maximum 77% efficiency was obtained in the three‐stage circuit. In addition, in the cases where the highest efficiency was observed, the load resistance values were calculated as 5590 and 14 610 Ω at the single stage and three stages, respectively. The load resistance value used to obtain higher efficiency values in the three‐stage circuit is increasing. Moreover, it was observed that as the number of stages increased, the output voltage also increased linearly. The maximum output voltage which was 1.8 V in the single‐stage was measured as ~5.16 V in three‐stages.

State-of-the-Art Techniques in RF Energy Harvesting Circuits

“…The efficiency of this work is 33% for −7 dBm input power. The authors have used HSMS-285C diodes in [46] to manufacture and compare a 1-stage Dickson rectifier and a 3-stage Dickson rectifier. The circuits tune in 1 GHz and for −7 dBm input power.…”

“…[41] HSMS2820 Dual-Stage Voltage Doubler [42] SMS7630-079 3 Rectifiers in Series [43] SMS7630 Voltage Doubler [45] SMS7630 Single Diode Rectifier [46] HSMS-285C 1-Stage Dickson Rectifier [47] HSMS 286C Rectifier…”

Design & simulation of dual-band rectifier for ambient RF energy harvesting

“…Various rectifier designs, such as single frequency [4][5][6][7][8][9], dual-band [10][11][12][13][14][15][16][17][18], tri-band [19][20][21][22][23][24][25], quad-band [26][27][28], and broadband [29], are used to create an efficient rectifier.…”

“…Xiao et al [5] and Kasar et al [6] proposed high efficiency (>70%) single frequency rectifiers, but they operate at higher input power (>7 dBm).…”

A wide input power range rectenna for energy harvesting and wireless power transfer applications

“…In order to provide an adequate load for each stage of the rectifier circuit, a load block composed of two Schottky diodes HSMS2820 (DL1 and DL2) is proposed as shown in Figure 5. Theoretical 8 and experimental 10 studies have demonstrated that each Schottky diode‐based rectifier circuit has its own optimal value of the load resistance where the PCE is optimal. The optimal load values for the first and second stages of the conversion block are R Load1 = R 1 + R 2 and R Load2 = R 1 , respectively, where R 1 = 1 kΩ and R 2 = 0.3 kΩ.…”