論文

査読有り
2013年10月

Effect of annual rings on transmission of 100 GHz millimeter waves through wood

Journal of Wood Science
  • Soichi Tanaka
  • ,
  • Yuko Fujiwara
  • ,
  • Yoshihisa Fujii
  • ,
  • Shogo Okumura
  • ,
  • Hiroyoshi Togo
  • ,
  • Naoya Kukutsu
  • ,
  • Shoji Mochizuki

59
5
開始ページ
375
終了ページ
382
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1007/s10086-013-1342-6

For the application of millimeter wave (MMW) technique to nondestructive evaluation of wood, the effect of annual rings on the behavior of a 100 GHz MMW transmitted through wood was examined. The complex amplitude was measured for 2 mm thick flat- (LT) and quarter-sawn (LR) specimens of several species with different annual ring structures at 11 % moisture content, of which the density distribution was measured using X-ray radiography. For the LT specimens of all species and the LR specimens with small density fluctuation or with earlywood width smaller than the wavelength of the MMW (=3 mm), the amplitude and phase of the transmitted wave were similar to those of the wave without a specimen. For the LR specimen with large density fluctuation and with earlywood width close to or larger than the wavelength, the amplitude and phase were different from those of the wave without a specimen. All the measured complex amplitudes were well expressed using a diffraction model. It was concluded that the MMW is deformed by the density distribution, and then its components with periods shorter than the wavelength by diffraction are attenuated. © 2013 The Japan Wood Research Society.

リンク情報
DOI
https://doi.org/10.1007/s10086-013-1342-6
ID情報
  • DOI : 10.1007/s10086-013-1342-6
  • ISSN : 1435-0211
  • SCOPUS ID : 84885477029

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