{"title":"A Low Power Backscattering Architecture for Batteryless Sensor Nodes","authors":"Y. Qaragoez, S. Pollin, D. Schreurs","doi":"10.1109/imarc49196.2021.9714698","DOIUrl":null,"url":null,"abstract":"This paper presents a novel architecture for low power IoT sensor nodes, integrating backscattering and energy harvesting circuits. The proposed circuit employs a bandpass filter (BPF) integrated with an efficient wide-band rectifier and a variable impedance to create two distinct and nearby frequency bands for energy harvesting (fEH) and backscattering (fBS). For a two-tone incident signal with a total peak power of -7 dBm, -16.7 dBm power is backscattered while 56.45 μW power is harvested. Backscattering achieves 10.1 dB dynamic range with 8% reduction in the efficiency of the energy harvester. Integrated backscattering and harvesting circuit (IBHC) achieves 45% peak power conversion efficiency (PCE) at -10 dBm and 10 MHz minimum frequency spacing between the two bands.","PeriodicalId":226787,"journal":{"name":"2021 IEEE MTT-S International Microwave and RF Conference (IMARC)","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2021-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2021 IEEE MTT-S International Microwave and RF Conference (IMARC)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/imarc49196.2021.9714698","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
This paper presents a novel architecture for low power IoT sensor nodes, integrating backscattering and energy harvesting circuits. The proposed circuit employs a bandpass filter (BPF) integrated with an efficient wide-band rectifier and a variable impedance to create two distinct and nearby frequency bands for energy harvesting (fEH) and backscattering (fBS). For a two-tone incident signal with a total peak power of -7 dBm, -16.7 dBm power is backscattered while 56.45 μW power is harvested. Backscattering achieves 10.1 dB dynamic range with 8% reduction in the efficiency of the energy harvester. Integrated backscattering and harvesting circuit (IBHC) achieves 45% peak power conversion efficiency (PCE) at -10 dBm and 10 MHz minimum frequency spacing between the two bands.