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Statistic properties of rainfall in Tokyo are presented in this paper. Average rain duration as a function of rain rate is analyzed for future route switching technique to increase network availability. In case of strong rain (>100 mm/h), minimum and maximum duration were 20 sec. and 335 sec., respectively. It was found that even in the campus within 1 km, rain rate is different at each site and...
This paper introduces an example of a small antenna measurement system with the optical fiber link technologies in the millimeter-wave band. The effect of the facilities such as the connect jig and the measurement system should be carefully estimated in the antenna measurement. The radiation patterns of a 60 GHz small package antenna have been measured by the optical fiber link system.
Rain-rate time series generation algorithm at two different locations is developed for millimeter-wave wireless link simulator. Dependent rain-rate time series was generated by introducing different location rain rate conditional probability distribution. The proposed algorithm is investigated using measured data in Tokyo Tech millimeter-wave model network. Similarity of shape and time shifting characteristic...
A de-embedding method using an electromagnetic (EM) simulator is proposed to extract field-effect transistor (FET) characteristics from FET test-pattern measurements. In the proposed method, the S-parameters of the parasitic circuit are analyzed using the EM simulator. Hybrid S/Z-parameters, converted from S-parameters, are used for the parasitic circuit to express waveguide ports with S-parameters...
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