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    • 2. 发明专利
    • Radio wave absorber and road side wall
    • 无线电波吸收器和道路侧壁
    • JP2005213739A
    • 2005-08-11
    • JP2004018002
    • 2004-01-27
    • Nippon Sheet Glass Environment Amenity Co Ltd日本板硝子環境アメニティ株式会社
    • TANI MASATOMIYASAKA HIROSHIHONDA SATORUTOGASHI MOTOYASUTAKEYAMA MASAAKIOKAMOTO TAKEHISA
    • E01F8/00H05K9/00
    • PROBLEM TO BE SOLVED: To provide a road side wall which can absorb sound waves and radio waves, and has fewer limitations than a conventional wall body capable of absorbing sound waves and radio waves in terms of material selection and entire structure, and to provide a radio wave absorber which is for use in building a road side wall or the like, has a radio wave absorbing capability and a sound wave transmissive capability.
      SOLUTION: The road side wall A is formed of a radio wave absorbing layer 1 having a plurality of holes 11 formed therein which is arranged on the incident side of radio waves and sound waves, a sound absorbing body 2 (and an air layer 4) arranged on the rear side of the radio wave absorbing layer 1, and a rigid metallic plate 3 arranged on the rearmost side of the road side wall, and has both radio wave absorbing performance and sound absorbing performance. Each hole 11 formed in the radio wave absorbing layer 1 has a maximum diameter that is equal to or smaller than a wavelength of an absorption target radio wave (e.g. 5.8 GHz radio waves for use in the ITS), and an area ratio (open area ratio) of the entire holes 11 to the surface of the radio wave absorbing layer 1 is set to 5 % or more.
      COPYRIGHT: (C)2005,JPO&NCIPI
    • 要解决的问题:提供能够吸收声波和无线电波的路侧壁,并且在材料选择和整体结构方面能够吸收声波和无线电波的传统壁体的限制较少, 提供一种用于建筑道路侧壁等的无线电波吸收体,具有无线电波吸收能力和声波传播能力。 解决方案:路侧壁A由布置在无线电波和声波的入射侧的多个孔11形成的无线电波吸收层1,吸声体2(和空气) 布置在无线电波吸收层1的后侧的层4)和布置在路侧墙的最后侧的刚性金属板3,具有无线电波吸收性能和吸声性能。 形成在无线电波吸收层1中的每个孔11的最大直径等于或小于吸收目标无线电波的波长(例如,用于ITS的5.8GHz无线电波),并且面积比(开放面积 将整个孔11与无线电波吸收层1的表面的比率设定为5%以上。 版权所有(C)2005,JPO&NCIPI