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http://dx.doi.org/10.4283/JKMS.2013.23.2.068

Electromagnetic wave Shielding Materials for the Wireless Power Transfer Module in Mobile Handset  

Bae, Seok (Applied Materials Lab., LG Innotek Components & Material R&D Center)
Choi, Don-Chul (Applied Materials Lab., LG Innotek Components & Material R&D Center)
Hyun, Soon-Young (Applied Materials Lab., LG Innotek Components & Material R&D Center)
Lee, Sang Won (Applied Materials Lab., LG Innotek Components & Material R&D Center)
Publication Information
Journal of the Korean Magnetics Society / v.23, no.2, 2013 , pp. 68-76 More about this Journal
Abstract
Currently, wireless power transmission technology based on magnetic induction was employed in battery charger for smart phone application. The system consists of wireless power transmitter in base station and receiver in smart phone. Size and thickness of receiver was strictly limited in the newest smart phone. In order to achieve high efficiency of a tiny small wireless power receiver module, sub-millimeter thick electromagnetic wave shielding sheet having high permeability and Q was essential component. It was found that magnetic field from transmitter to receiver can be intensified by sufficient shielding cause to minimize leakage magnetic flux by those magnetic properties. This leads to high efficiency of wireless power transmission and protects crucial integrated circuit of main board from electromagnetic noise. The important soft magnetic materials were introduced and summarized for the current small-power wireless power charger and NFC application and mid-power home appliance and high-power automotive application in the near future.
Keywords
wireless power transmission; wireless charger; electromagnetic wave shielding;
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