Development and Evaluation of Electromagnetic Wave Absorber  Composed of Porous Ferrite

Juji KATO; Noriyuki OHSUGI; Yoshio MATSUO

doi:10.14852/jcersjsuppl.112.0.S769.0

Journal of the Ceramic Society of Japan, Supplement 112-1, PacRim5 Special Issue

Session ID : 10

DOI https://doi.org/10.14852/jcersjsuppl.112.0.S769.0

Conference information

Host: The Ceramic Society of Japan

Co-host: Iketani Science and Technology Foundation, International Ceramic Federation, Commemorative Organization for the Japan World Exposition '70, The American Ceramic Society, The Australasian Ceramic Society, The Chinese Ceramic Society, The Korean Ceramic Society, Joint Research Consortium of Synergy Ceramics/Fine Ceramics Research Association, Nanotechnology Researchers Network Center of Japan, The Special Coordination Funds for Promoting Science and Technology, Japan National Tourist Organization, Aichi Prefectural Government, CASIO SCIENCE PROMOTION FOUNDATION, DAIKO FOUNDATION, Nagoya Convention and Visitors Bureau, The Asahi Glass Foundation, The Kao Foundation For Arts And Sciences, The Murata Science Foundation, The Ogasawara Foundation for the Promotion of Science & Engineering, ASAHI GLASS CO., LTD. Research Center, CENTRAL GLASS CO., LTD., ELECTRIC GLASS INDUSTRY ASSOCIATION OF JAPAN (EGAJ), Hattori Company, Ltd., Hitachi Research Laboratory, Hitachi, Ltd., HOYA CORPORATION, INAX Corporation, ITOCHU CERATECH CORP., Japan Cement Association, KYOCERA Corporation, KYUSHU REFRACTORIES CO., LTD., MINO CERAMIC CO., LTD., Murata Manufacturing Co., Ltd., NGK INSULATORS LTD., NGK SPARK PLUG CO., LTD., NICHIAS Corporation, NIKKO COMPANY, Nippon Electric Glass Co., Ltd., Nippon Sheet Glass Co., Ltd., NORITAKE CO., LIMITED, Tokuyama Corporation, TOTO LTD.

Papers

Development and Evaluation of Electromagnetic Wave Absorber Composed of Porous Ferrite

Juji KATO, Noriyuki OHSUGI, Yoshio MATSUO

Author information

Keywords: Electromagnetic wave absorber, EMC, Porous ferrite, Permeability, Permittivity

CONFERENCE PROCEEDINGS FREE ACCESS

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Abstract

Electromagnetic wave is being used in various fields by the advancement of information and communication technology, as a result electromagnetic environment turned worse. In particular, electromagnetic wave obstacles became a serious problem. We developed sintered porous ferrite for electromagnetic wave absorbers and found that the absorption band became high and wide. These effects were larger with the increase of pore ratio. As a result, we developed an absorber for the wide band, which covered all UHF bands of TV frequencies. Furthermore, we developed new electromagnetic wave absorbers, which could support an absorption band more than 1 GHz that sintering ferrite was not able to be equivalent till now. These are useful for Bluetooth and ETC frequencies.

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