Study of Underwater Electromagnetic Wave Propagation Based on Motions of Sea Water Molecules

• Project/Area Number: 21560842
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Naval and maritime engineering
• Research Institution: Japan Agency for Marine-Earth Science and Technology
• Principal Investigator: YOSHIDA Hiroshi 独立行政法人海洋研究開発機構, 海洋工学センター, グループリーダー (00359134)
• Project Period (FY): 2009 – 2012
• Project Status: Completed (Fiscal Year 2012)
• Budget Amount: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000); Fiscal Year 2011: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2010: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000); Fiscal Year 2009: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
• Keywords: 海中電磁波伝搬 / 海中分子運動 / 深海技術 / 海中アンテナ / 水中アンテナ / 海中伝搬 / 海水分子 / 海中 / 微視的 / 電磁波 / 深海 / 伝搬特性 / 海水

Research Abstract

We obtained some data which shows us that high frequency electromagnetic wave may propagate in sea water over hundreds meters. To describe this phenomenon, we prepared some propagation models taking motions of sea water molecules into account. But we did not achieve establishing an optimal model for the explanation. We intend to continue the study by using the tools made.

Research Products

• [Journal Article] Underwater Electromagnetics and Its Application to Unmanned Underwater Platforms (2013)
  • Author(s): Hiroshi Yoshida
  • Journal Title: Proc. Sym Underwater Technology 2013 Volume: UT2-13-1106
• [Journal Article] Underwater Electromagnetics and Its Application to Unmanned Underwater Platforms (2013)
  • Author(s): Hiroshi Yoshida
  • Journal Title: Proc. Int. Sympo. Underwater Technology, UT2013-1106 Volume: UT2013-1106 Pages: 1-5
• [Journal Article] Study on Land-to-Underwater communication (2011)
  • Author(s): Yoshida, H.; Hyakudome, T.; Ishibashi, S.; Ochi, H.; Asakawa, K.; Kasaya, T.; Saito, T.; Okamoto, S
  • Journal Title: 14th International Symposium on Wireless Personal Multimedia Communications (WPMC) Volume: 3-7 Pages: 1-5
  • Peer Reviewed
• [Presentation] 海水中の電磁場応答に関する基礎研究2 (2013)
  • Author(s): 吉田 弘
  • Organizer: 海洋理工学会・春季講演会
  • Place of Presentation: 東京海洋大学品川キャンパス
  • Year and Date: 2013-05-17
• [Presentation] Underwater Electromagnetics and Its Application to Unmanned Underwater Platforms (2013)
  • Author(s): Hiroshi Yoshida
  • Organizer: Sympo on Underwater Technology 2013
  • Place of Presentation: 東京大学
• [Presentation] 海水の電磁場応答に関する基礎研究2 (2013)
  • Author(s): 吉田 弘
  • Organizer: 海洋理工学会
  • Place of Presentation: 東京海洋大学
• [Presentation] 海水中の電磁場応答に関する基礎研究 (2010)
  • Author(s): 吉田 弘
  • Organizer: 海洋理工学会・春季講演会
  • Place of Presentation: 海洋研究開発機構東京事務所
  • Year and Date: 2010-05-20
• [Presentation] 海水の電磁場応答に関する基礎研究 (2010)
  • Author(s): 吉田弘
  • Organizer: 海洋理工学会平成22年度春季大会
  • Place of Presentation: 海洋研究開発機構東京事務所セミナー室
  • Year and Date: 2010-05-20
• [Remarks] Ram Somaraju and Jochen Trumpf, "Frequency, Temperature and Salinity Variation of the Permittivity of Seawater," IEEE Trans. AP, 54, 11, pp. 3441-3447, 2006