ワイヤレス通信用マイクロ波誘電体セラミックスの研究開発

• 大里 齊

  名古屋工業大学大学院工学研究科物質工学専攻

書誌事項

タイトル別名

• Research and Development of Microwave Dielectric Ceramics for Wireless Communications
• Special Article: The 59th CerSJ Awards for Academic Achievements Research and Development of Microwave Dielectric Ceramics for Wireless Communications

抄録

Intense research and development of microwave and millimeterwave dielectric materials is expected for applications in the wireless communications in the ubiquitous age. There are three important directions for research and development of microwave and millimeterwave dielectric materials. We have been studying on these three directions based on the crystallography. In the first direction for miniaturization of mobile equipments, tungstenbronze-type like Ba_6-3xR_8+2xTi₁₈O₅₄ (R=rare earth) solid solutions with high dielectric constant have been studied to improve quality factor based on the compositional ordering of cations. For the second direction for applications in mobile phone base stations, we have developed homologous ALa₄Ti₄O₁₅ (A=Ba, Sr and Ca) compounds with excellent dielectric properties such as high dielectric constant and high quality factor. For the third direction, dielectric ceramics of silicate compounds such as forsterite Mg₂SiO₄ and willemite Zn₂SiO₄, and alumina are expected for millimeterwave applications. The dielectric ceramics with high quality factor are obtained by using high purity raw materials. Temperature coefficients of resonant frequency τ_f of these materials are improved adding rutile with high positive τ_f.<br>

収録刊行物

• Journal of the Ceramic Society of Japan (日本セラミックス協会学術論文誌)

  Journal of the Ceramic Society of Japan (日本セラミックス協会学術論文誌) 113 (1323), 703-711, 2005

  公益社団法人 日本セラミックス協会

キーワード

• Material design
• Relation between crystal structure and properties
• Microwave/millimeterwave dielectrics
• Dielectric resonator

詳細情報

• CRID: 1390282680255686016
• NII論文ID: 110004066544
• NII書誌ID: AN10040326
• DOI: 10.2109/jcersj.113.703
• ISSN: 18821022
• ISSN: 09145400
• NDL書誌ID: 7719457
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7719457
• Web Site: http://www.jstage.jst.go.jp/article/jcersj/113/1323/113_1323_703/_pdf
• 本文言語コード: en
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