||A Concurrent Triple-band RF Energy Harvesting Circuit for IoT Sensor Networks
||(Luong Duy Manh) ; (Phan Thi Bich) ; (Nguyen Thuy Linh) ; (Nguyen Huy Hoang) ; (Tran Xuan Nam) ; (Koichiro Ishibashi)
|| RFEH; Antenna; Rectifier; Triple-band
||In this paper, a concurrent triple-band RF energy harvesting circuit is proposed. The proposed circuit incorporates a triple-band microstrip antenna combining a low-loss diplexer and three compact RF rectifiers. The proposed circuit operates concurrently at three popular frequency bands: GSM-900, GSM-1800, and 2.45 GHz. To improve output voltage and efficiency, three rectifiers are connected in a stacked topology. The simulated and measured results demonstrate that the circuit operates well in concurrent bands. Moreover, the proposed circuit exhibits a lowcomplexity structure and compactness in size. These advantages make the circuit a strong potential candidate for running low-power devices in IoT sensor networks.