Reconfigurable Wireless Power Transfer System for Multiple Receivers
- Authors
- Hwang, Sun-Han; Kang, Chung G.; Lee, Seung-Min; Lee, Moon-Que
- Issue Date
- 10월-2016
- Publisher
- KOREAN INST ELECTROMAGNETIC ENGINEERING & SCIENCE
- Keywords
- LCIPT; Multiport Amplifier (MPA); Wireless Power Transfer (WPT); 3 dB Coupler
- Citation
- JOURNAL OF ELECTROMAGNETIC ENGINEERING AND SCIENCE, v.16, no.4, pp.199 - 205
- Indexed
- SCOPUS
KCI
- Journal Title
- JOURNAL OF ELECTROMAGNETIC ENGINEERING AND SCIENCE
- Volume
- 16
- Number
- 4
- Start Page
- 199
- End Page
- 205
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/132464
- DOI
- 10.5515/JKIEES.2016.16.4.199
- ISSN
- 2671-7255
- 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.
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