Wide-Range Adaptive RF-to-DC Power Converter for UHF RFIDs

Mahmoud H. Ouda, Waleed Khalil, Khaled N. Salama

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

A wide-range, differential, cross-coupled rectifier is proposed with an extended dynamic range of input RF power that enables wireless powering from varying distances. The proposed architecture mitigates the reverse-leakage problem in conven- tional, cross-coupled rectifiers without degrading sensitivity. A prototype is designed for UHF RFID applications, and is imple- mented using 0.18 μ m CMOS technology. On-chip measurements demonstrate a sensitivity of − 18 dBm for 1 V output over a 100 k Ω load and a peak RF-to-DC power conversion efficiency of 65%. A conventional, fully cross-coupled rectifier is fabricated along- side for comparison and the proposed rectifier shows more than 2 × increase in dynamic range and a 25% boosting in output voltage than the conventional rectifier
Original languageEnglish (US)
Pages (from-to)634-636
Number of pages3
JournalIEEE Microwave and Wireless Components Letters
Volume26
Issue number8
DOIs
StatePublished - Jul 27 2016

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