Energy-autonomous Bi-directional Wireless Power Transmission (WPT) and energy harvesting circuit

Massimo del Prete*, Alessandra Costanzo, Apostolos Georgiadis, Ana Collado, Diego Masotti, Zoya Popovic

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

14 Citations (Scopus)


This work demonstrates a novel 2.45-GHz bidirectional circuit that can operate as both a wireless power transmitter and energy harvester. The circuit is based on a class-F oscillator/rectifier and is energy-autonomous since it does not need an external bias supply for either power transmission or power reception. Bi-directionality is exploited in two steps: the system first operates in rectifying mode with harvested DC voltages for biasing the oscillator; followed by the transmitting mode where the harvested DC power is used to start up oscillations. Conversion efficiencies for both configurations are higher than 50% for output/input RF power in the 10dBm range. This component can be exploited as a "power relay node" for distributed battery-less energy autonomous microsystems.

Original languageEnglish
Title of host publication2015 IEEE MTT-S International Microwave Symposium (IMS)
Number of pages4
ISBN (Electronic)978-1-4799-8275-2
Publication statusPublished - 2015
Event2015 IEEE MTT International Microwave Symposium - Phoenix, AZ, United States
Duration: 17 May 201522 May 2015


Conference2015 IEEE MTT International Microwave Symposium
Abbreviated titleIMS 2015
Country/TerritoryUnited States
CityPhoenix, AZ


  • wireless power transfer
  • energy harvesting
  • rectifier
  • autonomous circuit
  • battery-less


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