| Presentation | 2017-01-20 An analytical study on the advanced EM shielding for mobile devices to provide sufficient transparency in frequency bands used for wireless communications and attenuation in other frequencies Go Itami, Yohei Toriumi, Kazuhiro Takaya, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | There is a concern about a risk of information leakage, such as eavesdropping on display screens and typing characters of mobile devices through electromagnetic radiation from the devices. Conventional electromagnetic shielding technologies, which are applied for suppressing the electromagnetic radiation, cannot be applied in this case, because frequencies of the radiation and wireless communications are in a same range. This paper describes a proposal of advanced electromagnetic shield, which realizes both the suppression of the electromagnetic radiation, and the wireless communications, by applying electromagnetic-controllable materials on the shield, which are called frequency selective surface (FSS). We have studied about resonator structures of the FSS by electromagnetic field analysis, focusing on the number and center values of resonant frequencies of the FSS with considering size limitations. As a result, we have found the multi-band resonance of the FSS by applying self-similarity structures on it, and found the downward shift of the resonant frequency of the FSS by extending electrical-pathway of it. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | emanated electromagnetic wave / electromagnetic shield / frequency selective surface / resonator |
| Paper # | EMCJ2016-117 |
| Date of Issue | 2017-01-12 (EMCJ) |
| Conference Information | |
| Committee | EMCJ |
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| Conference Date | 2017/1/19(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Kyushu Institute of Technology |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Communication, EMC |
| Chair | Hideaki Sone(Tohoku Univ.) |
| Vice Chair | Osami Wada(Kyoto Univ.) |
| Secretary | Osami Wada(AIST) |
| Assistant | Yoshiki Kayano(Univ. of Electro-Comm.) / Yusaku Katsube(Hitachi) / Chie Sasaki(Panasonic) |
| Paper Information | |
| Registration To | Technical Committee on Electromagnetic Compatibility |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | An analytical study on the advanced EM shielding for mobile devices to provide sufficient transparency in frequency bands used for wireless communications and attenuation in other frequencies |
| Sub Title (in English) | |
| Keyword(1) | emanated electromagnetic wave |
| Keyword(2) | electromagnetic shield |
| Keyword(3) | frequency selective surface |
| Keyword(4) | resonator |
| 1st Author's Name | Go Itami |
| 1st Author's Affiliation | Nippon Telegraph and Telephone Corporation(NTT) |
| 2nd Author's Name | Yohei Toriumi |
| 2nd Author's Affiliation | Nippon Telegraph and Telephone Corporation(NTT) |
| 3rd Author's Name | Kazuhiro Takaya |
| 3rd Author's Affiliation | Nippon Telegraph and Telephone Corporation(NTT) |
| Date | 2017-01-20 |
| Paper # | EMCJ2016-117 |
| Volume (vol) | vol.116 |
| Number (no) | EMCJ-399 |
| Page | pp.pp.45-50(EMCJ), |
| #Pages | 6 |
| Date of Issue | 2017-01-12 (EMCJ) |