Compact Triple-Band Rectifier for Ambient RF Energy Harvesting Application

Compact Rectifier Circuit Design for Harvesting GSM/900 Ambient Energy

“…To analyze the PCE of the proposed rectifier, Figure 5a presents the result of the load terminal (R L ) sweep at various input power levels (from −15 dBm to 10 dBm in step of 5 dBm). The result shows that the efficiency increases with an increase of input power across the load which agreed well with Equation (7) [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22]. The rectifier achieves a maximum PCE along the 2-4 kΩ load terminal in both cases.…”

“…Many foregoing types of research in the RFEH system focused on a much higher frequency between GSM/1800 to WLAN/5200 to achieve compactness. The operational frequency contributed significantly to achieving a compact RFEH circuit [7][8][9][10][11][12][13][14][15][16][17][18]. The RF spectral survey from the open literature and the one carried out in this work, using (Aim TTi PSA6005 6 GHz RF spectrum analyzer), come out with a notable result surrounding the lower GSM/900 band towards generating higher available ambient RF power [14,15].…”

“…RFEH is believed to be a promising technology through direct power or battery recharging from abundant electromagnetic (EM) energy radiating in the environment. The technology can be deployed in low-powered devices for security surveillance, smart farming and many more [5][6][7][8]. Initially, the concept of energy harvesting started to evolve in the 1990s along with Tesla finding's on electrical energy conversion from an EM wave [5].…”

“…Several RFEH circuits design have been studied and proposed to achieve significant PCE through the use of wide-band, multi-band, dual and single band rectifiers. Among the designs, single-band rectenna used to be more efficient as compared to their wide or broad band counter parts [5,8]. The broadband rectifiers are generally associated with much more circuits complexity, which reduces the overall circuit performance because of parasitics capacitance at the junction of the diode and other lumped elements [8,9].…”

“…Among the designs, single-band rectenna used to be more efficient as compared to their wide or broad band counter parts [5,8]. The broadband rectifiers are generally associated with much more circuits complexity, which reduces the overall circuit performance because of parasitics capacitance at the junction of the diode and other lumped elements [8,9]. The authors of [10,11] designed a rectenna with maximum PCE at 37.8% and 28% using −1.5 dBm and −15 dBm input power.…”