期刊
出版社
IEEE
DOI: 10.1109/isemc.2019.8825221
关键词
3D Cellular phones; coils; eddy currents; electromagnetic field; inductive charging; inductive power transmission; magnetic field; near field communication; wireless power transfer
资金
- MSIT(Ministry of Science and ICT), Korea, under the ITRC(Information Technology Research Center) support program [IITP-20192016-0-00291]
- Development of Interconnection System and Process for Flexible Three Dimensional Heterogeneous Devices - MOTIE (Ministry of Trade, Industry and Energy) in Korea
Current wireless power transfer (WPT) technology is widely used for various applications because of convenience and safety. One of the typical application of the WPT system is the near-field communication (NFC) system utilized mobile WPT system. However, WPT systems have problems with electromagnetic field (EMF) leakage which can cause electromagnetic interference (EMI) issues on the nearby electrical devices. In this paper, we propose the dual resonance NFC coil for EMF reduction. Proposed dual resonance coil generates resonance not only at the NFC operating frequency of 13.56 MHz but also at the wireless charging frequency 130 kHz. When comparing the proposed NFC coil with a typical NFC antenna, the total EMF level of the WPT system is reduced by 3.96 dB at 130 kHz without any effect at the NFC operating frequency of 13.56 MHz.
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