MEASUREMENT OF ABSORPTION CHARACTERISTICS OF VHF WAVES IN REINFORCED CONCRETE BY PARALLEL WIRE LINE : Study on the absorption characteristics of VHF waves in ferrite mortar

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  • IKEDA Tetsuo
    Dept. of Electrical Engineering, Nagoya Institute of Technology
  • KAWABE Shinji
    Dept. of Environmental Technology and Urban Planning, Nagoya Institute of Technology
  • SHIMOGAMA Kazuo
    Dept. of Environmental Technology and Urban Planning, Nagoya Institute of Technology
  • OKAJIMA Tatsuo
    Nagoya Institute of Technology

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Other Title
  • 平行二線線路による鉄筋コンクリートのTV電波吸収特性の測定 : フェライト混入モルタルのTV電波吸収特性に関する研究
  • ヘイコウ 2セン センロ ニ ヨル テッキン コンクリート ノ TV デンパ

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In city area, electromagnetic interference caused by buildings is a very important problem. For example, a well known ghost phenomenon is caused by interaction between incident and reflected waves caused due to the presence of large and tall buildings. The characteristics of the radio waves used in television broad casting absorption have been measured by coaxial-wave-guide unit or curtain wall specimens. But these measurements have some demerits. In this regards, a new measurement technique by panel specimen using parallel wire line was proposed recently. The electric wave absorption characteristics of the reinforcing rod inside the reinforced concrete structures are examined using the recently proposed technique. A reinforcing rod in horizontal direction influences electric wave absorption characteristics of the concrete. In this paper, an equation for calculation of average electric wave absorption of concrete structures in presence of reinforcement is proposed taking care of the effect of the distribution of the reinforcement. In this method, an equivalent material characteristics of the composite material is calculated. This method has potential of application in other different composite material also.

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