TITLE:
Measurement of Rain Attenuation in Terahertz Wave Range
AUTHORS:
Seishiro Ishii, Syuji Sayama, Toshihisa Kamei
KEYWORDS:
Terahertz Wave, Rain Attenuation, Raindrop-Size Distribution, M-P Distribution, Weibull Distribution, ITU-R
JOURNAL NAME:
Wireless Engineering and Technology,
Vol.2 No.3,
July
6,
2011
ABSTRACT: Rain attenuation at 355.2 GHz in the terahertz wave range was measured with our new 355.2 GHz measuring system under rainfall intensities up to 25 mm/hr. Rain attenuation coefficients were also calculated using four raindrop-size distributions, e Marshall-Palmer (M-P), Best, Polyakova-Shifrin (P-S) and Weibull distributions, and using a specific rain attenuation model for prediction methods recommended by ITU-R. Measurements of a terahertz wave taken at 355.2 GHz were compared with our calculations. Results showed that the propagation experiment was in very good agreement with a calculation from a specific attenuation model for use in prediction method recommended by ITU-R.