Human-Blockage Comparison Between SHF and UHF Bands: A Reciprocating Motion Pedestrian Case

The use of high-frequency bands is becoming increasingly popular for achieving higher speed, lower latency, and higher capacity in wireless communication systems. One way to use high-frequency bands is to improve the transmission performance by linking neighboring terminals. However, it is recognized that high-frequency band wireless communications are susceptible to obstructions. In particular, the shadowing effect caused by the human body between neighboring terminals is a major problem, especially when high-frequency bands are used for terminal collaboration. This paper reports the comparison results of the shadowing effects measured in the super high frequency and ultra high frequency bands for a reciprocating motion pedestrian case. In this research, experiments are conducted in the electromagnetic anechoic chamber room to measure the effects of human shadowing in the $25.9 \mathbf{G H z}$ and 438 MHz bands. As a result, it was confirmed that the 25.9 GHz band has a shorter shadowed time and smaller shadowing gain than the 438 MHz band.