Using equipment from Rohde & Schwarz, DoCoMo tested propagation at frequencies up to 150 GHz. The frequency bands from 100 GHz to 300 GHz are expected to enable further high-speed and large-capacity communication for the next generation beyond 5G with data rates up to terabit/s.
In the 100 GHz to 300 GHz frequency bands, wider bandwidths are available than those used for 5G. However, these higher mmWave frequency bands are strongly affected by people, vehicles, trees and environmental conditions such as rain. The measurement parameters of the tests include the propagation loss (degree of attenuation of radio waves), power delay profile (arrival time of radio waves), angular profile (indicator of spread of radio wave arrival).
An R&S SMW200A signal generator working with the SMZ frequency multiplier generated the mmWave signal, while the R&S FSW85 signal and spectrum analyzer equipped with the R&S FS-Z170 harmonic mixer analyzed it with a scalable analysis bandwidth of up to 2 GHz in real time in an anechoic chamber. The results looked at the shielding effect of the human body, applying signals up to 150 GHz and in all common 5G frequency bands currently in use or under consideration.