Event Information

5th Special Research Seminar of School of Engineering "Wireless Power Transfer and Harmonic Suppressed Antenna with Ferrites+"

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Tuesday, June 19, 2018
10:45 - 12:00
South 3 Bldg, 2nd Floor, Meeting room 201, Ookayama South Area, Ookayama Campus, Tokyo Institute of Technology別窓
Subjects : Students and researchers from within and outside of the Institute, in particular those who are interested in Electrical and Electronic, Mechanical, and medical care
Shigeki Nakagawa

E-mail : nakagawa@ee.e.titech.ac.jp

Professor Yang-Ki Hong, The University of Alabama

Professor Yang-Ki Hong

Professor Yang-Ki Hong

E. A. "Larry" Drummond Endowed Chair Professor of the Department of Electrical and Computer Engineering (ECE)

Director of NSF IUCRC-UA: Center for Efficient Vehicles and Sustainable Transportation Systems (EV-STS)

Director of Magnetic Materials & Device Laboratory

Graduate Program Director of Department of Electrical and Computer Engineering

Professor of Materials Science Ph.D. Program

The University of Alabama


A simple wireless power charging (WPC) antenna system for use in simulating power transfer efficiency with and without ferrite and metallic object (battery case) developed by their group will be presented. Suitable magnetic properties and ferrite sheet thickness were identified.

The simulation results suggest that magnetic loss tangent (tan δμ) and permeability (μ) need to be less than 0.05 and higher than 125 at 13.56 MHz, respectively, to achieve at least 75% of the transfer efficiency of the WPC antenna without ferrite and the metallic object.

The improved ferrite core developed by their new sintering method meets criteria identified by the transfer efficiency simulation and is a good candidate for 13.56-MHz wireless power transfer charging antenna system.

A multiple-ferrite-cored patch antenna (MFC-PA) to suppress harmonic radiation over the frequency range of 1 to 10 GHz and obtain wide suppressing bandwidth is also developed. Its suppression performance was compared to those of the conventional patch antenna (PA), photonic bandgap patch antenna (PBG-PA), and defected ground structure patch antenna (DGS-PA). Ferrite loading is a unique approach to suppress any harmonic radiation.

Update : June 6, 2018

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