Hybrid metamaterial slab with negative and zero permeability for high efficiency and low electro-magnetic field in wireless power transfer systems = 무선전력전송 시스템에서 효율 향상과 전자파 노이즈를 줄이기 위한 음의 투자율과 제로 투자율을 가진 하이브리드 메타머터리얼

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Current wireless power transfer (WPT) systems have limited charging distance and high induced electro-magnetic field (EMF) leakage. Thus, we first proposed a thin PCB-type hybrid metamaterial slab (HMS) combining two kinds of metamaterial cell structures. The metamaterial cells in the center area of the HMS have zero relative permeability and straighten the magnetic field direction. The metamaterial cells located at the edges of the HMS have negative relative permeability and change the outgoing magnetic fields to opposite direction by magnetic boundary condition. Therefore, the magnetic field can be more confined between transmitter (Tx) and receiver (Rx) coils, enhancing the power transfer efficiency, while decreasing the EMF leakage in a WPT system. In this paper, we demonstrated that increased power transfer efficiency from 39.1% to 65.5% and reduced EMF leakage from -19.21 dBm to -26.03 dBm in 6.78 MHz WPT system. Furthermore, we proposed new analysis method for relative permeability measurement of the metamaterial using a novel cubic structure with perfect electrical conductor and perfect magnetic conductor boundary.
Advisors
Kim, Joung Horesearcher김정호researcher
Description
한국과학기술원 :전기및전자공학부,
Publisher
한국과학기술원
Issue Date
2017
Identifier
325007
Language
eng
Description

학위논문(박사) - 한국과학기술원 : 전기및전자공학부, 2017.8,[7, 61 p. :]

Keywords

efficiency▼aelectromagnetic field (EMF)▼ahybrid▼amagnetic field forming▼amagnetic field scanner▼ametamaterials▼anegative permeability▼awireless power transfer (WPT)▼azero permeability; 누설자기장 노이즈▼a메타머터리얼▼a무선전력전송▼a삼차원 자기장 필드 스케너▼a음의 투자율▼a제로 투자율▼a하이브리드 메타머터리얼

URI
http://hdl.handle.net/10203/242067
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=718940&flag=dissertation
Appears in Collection
EE-Theses_Ph.D.(박사논문)
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