| Title |
A CMOS Wideband RF Energy Harvester Employing Tunable Impedance Matching Network for Video Surveillance Disposable IoT Applications |
| Authors |
이동구(Dong-gu Lee) ; 이두희(Duehee Lee) ; 권구덕(Kuduck Kwon) |
| DOI |
http://doi.org/10.5370/KIEE.2019.68.2.304 |
| Keywords |
Image monitoring system ; Video surveillance ; Disposable IoT ; CMOS ; RF-to-DC converter ; Cross-coupled rectifier ; RF energy harvest ; Tunable impedance matching network ; Power conversion efficiency |
| Abstract |
This paper presents a CMOS RF-to-DC converter for video surveillance disposable IoT applications. It widely harvests RF energy of 3G/4G cellular low-band frequency range by employing a tunable impedance matching network. The proposed converter consists of the differential-drive cross-coupled rectifier and the matching network with a 4-bit capacitor array. The proposed converter is designed using 130-nm standard CMOS process. The designed energy harvester can rectify the RF signals from 700 MHz to 900 MHz. It has a peak RF-to-DC conversion efficiency of 72.25%, 64.97%, and 66.28% at 700 MHz, 800 MHz, and 900 MHz with a load resistance of 10kΩ, respectively. |