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


Kasar O., GÖZEL M. A. , KAHRİMAN M.

MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, cilt.62, ss.1542-1547, 2020 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 62 Konu: 4
  • Basım Tarihi: 2020
  • Doi Numarası: 10.1002/mop.32218
  • Dergi Adı: MICROWAVE AND OPTICAL TECHNOLOGY LETTERS
  • Sayfa Sayısı: ss.1542-1547

Özet

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 omega 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 similar to 5.16 V in three-stages.