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Low dielectric electromagnetic absorbing material in 18–40 GHz using large scale photonic crystal structures

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3 Author(s)
Narita, T. ; Nichias Corp., 1-8-1, Shinmiyakoda, Hamamatsu, Shizuoka 431-2103, Japan ; Matsumura, K. ; Kagawa, Y.

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The interaction behavior between a monolithic low dielectric block with unidirectionally aligned through holes and an electromagnetic wave at a frequency range from 18 to 40 GHz has been studied. Hexagonally aligned through holes, whose diameters are 8.0, 9.0, and 10.0 mm, are introduced to a polymethylmethacrylate block. The electromagnetic wave reflection and transmission spectra perpendicular to the hole axis show a unique structure dependence, which is related to the diameter of the hole and its arrangement. A large decrease in the reflectance and transmittance appears in the spectra, which originates from the interference effect between the electromagnetic wave and material. It is concluded that the material has a potential for controlling the electromagnetic wave at a tailored target frequency and is expected to be usable as monolithic low dielectric electromagnetic wave absorbing material.

Published in:

Journal of Applied Physics  (Volume:101 ,  Issue: 4 )