An active retrodirective antenna element for circularly polarized wireless power transmission

Pascual Hilario Re, Symon Podilchak, Constantin Constantinides, George Goussetis, Jaesup Lee

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

7 Citations (Scopus)


This paper presents a novel retrodirective array (RDA) circuit and antenna system for microwave wireless power transmission. Thanks to the principle of phase conjugation in mixers, retrodirectivity can be achieved in the far-field. More specifically, the proposed architecture in this article deals with an active transmitter module to retrodirect a received tone, with increased power, from a mobile unit and with circularly polarized (CP) radiation. Initial simulations predict an error below 4° with respect to the desired retrodirected phase at a different transmit frequency. In order to achieve this operation, it is necessary to use notch filters before and after the mixers, basically to avoid improper signal phase conjugation as well as unwanted signal re-radiation. To the authors' knowledge none of the reported RDAs designs found in the literature are able to provide similar functionality in terms of compactness and planar implementation as well as CP operation. Other applications for the proposed RDA circuit element include target tracking, low-cost sensor charging, and other wireless systems.

Original languageEnglish
Title of host publication2016 IEEE Wireless Power Transfer Conference (WPTC)
ISBN (Print)9781467379861
Publication statusPublished - 2016
Event2016 IEEE Wireless Power Transfer Conference - Aveiro, Portugal
Duration: 5 May 20166 May 2016


Conference2016 IEEE Wireless Power Transfer Conference
Abbreviated titleWPTC 2016

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering
  • Energy Engineering and Power Technology


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