Low-power RF energy harvester circuit design for wearable medical applications

Taeho Oh, Omiya Hassan, Samira Shamsir, Syed K. Islam

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations

Abstract

Electromagnetic based energy harvesting systems are being widely researched with radio frequency (RF) as their energy source. RF energy is preferred due to its availability and characteristics of transferring energy remotely and in all directions. This paper presents a newly design low-power CMOS full-bridge rectifier which works as the receiver of the harvesting system. The proposed rectifier scheme includes two NMOS and two PMOS devices and they are realized in a standard 130nm CMOS process. The work is focused on RF signals of around 900 MHz. To achieve stable energy transmission between the antenna and the proposed AC-DC rectifier, an impedance matching network is designed with values of capacitor and inductor of 550fF and 45nH, respectively. A DC-DC converter with a Maximum Power Point Tracking (MPPT) system is designed for storing energy from the RF signal with minimum current consumption. The peak efficiency of this design is about 5% at 10 dBm. The overall system is very light-weight and requires no external wiring and connection.

Original languageEnglish
Title of host publication2019 United States National Committee of URSI National Radio Science Meeting, USNC-URSI NRSM 2019
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781946815040
DOIs
StatePublished - 10 May 2019
Event2019 United States National Committee of URSI National Radio Science Meeting, USNC-URSI NRSM 2019 - Boulder, United States
Duration: 9 Jan 201912 Jan 2019

Publication series

Name2019 United States National Committee of URSI National Radio Science Meeting, USNC-URSI NRSM 2019

Conference

Conference2019 United States National Committee of URSI National Radio Science Meeting, USNC-URSI NRSM 2019
Country/TerritoryUnited States
CityBoulder
Period9/01/1912/01/19

Keywords

  • CMOS integrated circuits
  • biomedical equipment
  • energy harvesting
  • medical services
  • receivers
  • wearable sensors

EGS Disciplines

  • Electrical and Computer Engineering

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