2007 Fiscal Year Final Research Report Summary
Wave Absorber for Improving EM-Wave Environment between ETC Lanes and Its Practical Application
| Project/Area Number |
18560282
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
電力工学・電気機器工学
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| Research Institution | Aoyama Gakuin University |
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Principal Investigator |
HASHIMOTO Osamu Aoyama Gakuin University, College of Science and Engineering, Professor (60237930)
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| Co-Investigator(Kenkyū-buntansha) |
NISHIKATA Atsuhiro Tokyo Institute of Technology, The Center of Research and Development of Educational Technology, Assistant Professor (60260535)
MATSUMOTO Kouta Aoyama Gakuin University, College of Science and Engineering, Assistant (50406823)
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| Project Period (FY) |
2006 – 2007
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| Keywords | Wave Absorber / ETC Lane / Rain Forced Plastic / Magnetic Material / Lattice / Cylindrical Bars at Intervals / Metal Mesh |
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| Research Abstract |
In recent years, the non stop automatic charge payment system using wireless communication at 5.8GHz as central service of intelligent transport systems (ITS), which is called electronic toll collection (ETC), is spread widely and diffusion rate has reached to 75% in Japan at 2008. When the operation of ETC was started, communication errors were caused in ETC environment due to undesired electromagnetic(EM)waves from walls, ETC gates or other possible nearby objects. The optimal use of wave absorber is a possible way to mitigate this problem, and a variety of absorbers are used in various places, such as a board type used for the ceiling of tollgate, a pavement type used for the road surface. In such a background, the wave absorber for installing between ETC lanes is also required because the number of tollgate, where two or more ETC lanes are possessed, may increase with diffusion rate rise. Certain performance is necessary for this absorber, such as absorption of undesired EM waves, shielding effect of EM wave reaching adjacent lanes, ventilation to avoid the shock of the wind, and visibility to adjacent lanes.
In this research, some wave absorbers placed behind the metal mesh as back metal for improving ETC environment is proposed such as the type of reinforced plastic including glass fiber with periodic lattice, cylindrical bars with magnetic loss covers arranged periodically, and magnetic rubber sheet with circular lattice. Various characteristics are evaluated analytically and experimentally. As a result, good characteristics of reflection loss and shielding effect are obtained for circularly polarized wave using ETC system. Therefore, feasibility of proposed wave absorbers can be confirmed quantitatively.
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Research Products
(32 results)
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[Journal Article] Wave Absorber by Using Cylindrical Bars with Magnetic Loss Covers Arranged Metallic Mesh for Improving ETC Environment2008
Author(s)
K., Matsumoto, A., Kitamoto, T., Nakamura, T., Aoyagi, O., Hashimoto, T., Miyamoto
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Journal Title
IEICE Transactions on Electronics E91-C, 2
Pages: 220-223
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Wave Absorber Formed by Arranging Cylindrical Bars at Intervals for Installing between ETC Lanes2006
Author(s)
K., Matsumoto, T., Ozawa, T., Nakamura, T., Aoyagi, 0., Hashimoto, T., Miyamoto
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Journal Title
IEICE Transactions on Electronics E89-C
Pages: 1700-1703
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Wave Absorber by Using Cylindrical Bars with Magnetic Loss Covers Arranged Metallic Mesh for Installing between ETC Lanes2007
Author(s)
K., Matsumoto, A., Kitamoto, T., Nakamura, T., Aoyagi, O., Hashimoto, T., Miyamoto
Organizer
Asia-Pacific Microwave Conference 2007
Place of Presentation
Bangkok, Thailand
Year and Date
2007-12-12
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Wave Absorber with Circular Lattice Using Metal Mesh for Improving ETC Environment2007
Author(s)
K., Matsumoto, Y., Miura, T., Ozawa, O., Hashimoto, O., Okada
Organizer
18th International Zurich Symposium on Electromagnetic Compatibility
Place of Presentation
Munich, Germany
Year and Date
2007-09-26
Description
「研究成果報告書概要(欧文)」より
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[Presentation] A Study on Wave Absorber with Circular Lattice Using Ruber Sheet with Fine Weatherability2007
Author(s)
T., Ozawa, K., Matsumoto, Y., Miura, O., Okada, O., Hashimoto
Organizer
Technical Committee on Microwave Engineering
Place of Presentation
Kikai Shinko Kaikan, Japan
Year and Date
2007-01-18
Description
「研究成果報告書概要(欧文)」より
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[Presentation] A Study on Improvement of ETC Environment by Using Cylindrical Bars with Magnetic Loss Covers Arranged Metallic Mesh2006
Author(s)
A., Kitamoto, K., Matsumoto, T., Nakamura, T., Aoyagi, O., Hashimoto, T., Miyamoto
Organizer
Technical Committee on Microwave Engineering
Place of Presentation
Kitakyusyu Science and Research Park, Japan
Year and Date
2006-11-21
Description
「研究成果報告書概要(欧文)」より
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[Presentation] A Study on Wave Absorber Formed by Arranging Cylindrical Bars with Metallic Mesh for ETC2006
Author(s)
A., Kitamoto, K., Matsumoto, T., Nakamura, T., Aoyagi, O., Hashimoto, T., Miyamoto
Organizer
2006 IEICE Society Conference
Place of Presentation
Kanazawa University, Japan
Year and Date
2006-09-19
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Wave Absorber Formed by Arranging Cylindrical Bars at Intervals for Improving ETC Environment2006
Author(s)
K., Matsumoto, T., Ozawa, T., Nakamura, T., Aoyagi, O., Hashimoto, T., Miyamoto
Organizer
EMC Europe 2006
Place of Presentation
Barcelona, Spain
Year and Date
2006-09-08
Description
「研究成果報告書概要(欧文)」より
