Reconfigurable wireless power transfer system for multiple receivers

Sun Han Hwang, Chung G. Kang, Seung Min Lee, Moon Que Lee

    Research output: Contribution to journalArticlepeer-review

    7 Citations (Scopus)

    Abstract

    We present a novel schematic using a 3-dB coupler to transmit radiofrequency (RF) power to two receivers selectively. Whereas previous multiple receiver supporting schemes used hardware-switched methods, our scheme uses a soft power-allocating method, which has the advantage of variable power allocation in real time to each receiver. Using our scheme, we can split the charging area and focus the RF power on the targeted areas. We present our soft power-allocating method in three main points. First, we propose a new power distribution hardware structure using a FPGA (field-programmable gate array) and a 3-dB coupler. It can reconfigure the transmitting power to two receivers selectively using accurate FPGA-controlled signals with the aid of software. Second, we propose a power control method in our platform. We can variably control the total power of transmitter using the DC bias of the drain input of the amplifier. Third, we provide the possibility of expansion in multiple systems by extending these two wireless power transfer systems. We believe that this method is a new approach to controlling power amplifier output softly to support multiple receivers.

    Original languageEnglish
    Pages (from-to)199-205
    Number of pages7
    JournalJournal of Electromagnetic Engineering and Science
    Volume16
    Issue number4
    DOIs
    Publication statusPublished - 2016

    Bibliographical note

    Publisher Copyright:
    © The Korean Institute of Electromagnetic Engineering and Science. All Rights Reserved.

    Keywords

    • 3 dB coupler
    • LCIPT
    • Multiport amplifier (MPA)
    • Wireless power transfer (WPT)

    ASJC Scopus subject areas

    • Radiation
    • Instrumentation
    • Computer Networks and Communications
    • Electrical and Electronic Engineering

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