@inproceedings{5abcb1a7962f473a9107157aa07fec27,
title = "A 5.2 GHz RF energy harvester system using reconfigurable parallel rectenna",
abstract = "This paper presents a 5.2 GHz band, 67 \% efficiency at the input power of +20 dBm RF Energy Harvester (EH) for IoT/wearable devices. In order to keep the high efficiency over the wide RF input range, the reconfigurable 6-parallel rectenna is proposed. The configuration of rectenna is automatically changed depending on the RF input power level. Also, adaptive matching is proposed to adjust the matching network automatically depending on the number of stages of rectenna, RF input frequency, and load current. Each RF-DC converter in rectenna is implemented by two Schottky diodes in a package and with a harmonic control scheme to produce a reasonable output DC voltage. Buck-boost converter is integrated to provide a constant voltage to the IoT/wearable devices. By using reconfigurable structure, different values of efficiency and the output DC voltage can be achieved. The measured efficiency of RF EH is 67 \% with an output DC voltage of 6.1 V when the RF input power level is +20 dBm at the frequency of 5.2 GHz single-tone signal. It can charge the wearable devices such as G Watch, Mi band, and SmartThinQ.",
keywords = "DC-DC converter, IoT/wearable devices, Reconfigurable, Rectenna, RF energy harvester",
author = "Hamed Abbasizadeh and Kim, \{Sang Yun\} and Nga, \{Truong Thi Kim\} and Danial Khan and Oh, \{Seong Jin\} and Kim, \{Sung Jin\} and Kim, \{Kwan Tae\} and Kim, \{Dong In\} and Lee, \{Kang Yoon\}",
note = "Publisher Copyright: {\textcopyright} 2018 IEEE; 61st IEEE International Midwest Symposium on Circuits and Systems, MWSCAS 2018 ; Conference date: 05-08-2018 Through 08-08-2018",
year = "2018",
month = jul,
day = "2",
doi = "10.1109/MWSCAS.2018.8623867",
language = "English",
series = "Midwest Symposium on Circuits and Systems",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
pages = "436--439",
booktitle = "2018 IEEE 61st International Midwest Symposium on Circuits and Systems, MWSCAS 2018",
}