Frequency characteristics of changes in received levels by human body blockage in indoor environment

For fifth generation mobile communication systems (5G) utilization of band from 6 to 100 GHz are investigated to increase the system capacity, because ensuring a wide frequency band above 6 GHz is relatively easier than that under 6 GHz, which is used for IMT-Advanced systems. Moreover, utilizing small cell with base station antenna of which height is low is one of the promising candidates, since path loss becomes large due to higher frequency and necessity of increasing the system capacity. In above mentioned frequency and environments, influence of human body blockage increases compared to the existing systems. There are several reports regarding human body blockage in higher frequency band, however, it is considered that there are very few report regarding human body blockage in terms of frequency characteristics and more studies about these characteristics are needed. In this report, frequency characteristics of change in received level when pedestrians walk in indoor environment are investigated experimentally to clarify influence of human body shadowing in higher frequency band. Measurement is performed at 0.81GHz, 2.2 GHz and 19.85 GHz in indoor environment.