Ishii, SeishiroSayama, SyujiKamei, Toshihisa2016-10-272016-10-272011-07Wireless Engineering and Technology, 2011, 2, 119-124http://dx.doi.org/10.4236/wet.2011.23017http://hdl.handle.net/123456789/1078ain 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.enTerahertz WavesRain AttenuationRaindrop-Size DistributionM-P DistributionWeibull DistributionITU-RArticle