Presentation Information
[B-17-14]Measurement of Human Torso Blocking with Image Analysis in Dynamic Environments
using Varying Antenna Spacing for Millimeter-Wave WBANs
◎Kenshin Suzuki1, Kohei Akimoto1, Teruo Tobana1, Noriharu Suematsu2 (1. Akita Prefectural University, 2. Tohoku University)
Keywords:
WBAN,millimeter wave,Human Body Blocking,60 GHz,Dynamic Environments
In wireless body area networks (WBANs), interference between WBANs is a major challenge. Millimeter-wave communication can mitigate this interference through human-body blocking attenuation. Since radio-wave propagation depends strongly on human movement, human-body blocking characteristics in dynamic environments must be clarified. Therefore, this study investigates human-body blocking attenuation through measurements at 60 GHz.
Measurements were conducted at waist height using horn antennas with separations of 1 m, 2 m, and 3 m. Both vertical and horizontal polarizations were evaluated. A subject wearing a waist marker walked between the Tx and Rx antennas while being recorded by a camera. Marker positions obtained through image analysis were correlated with the received power.
The results confirmed attenuation caused by the torso and arms. Maximum attenuation increased as antenna separation decreased because shielding increased and diffraction was reduced.
Measurements were conducted at waist height using horn antennas with separations of 1 m, 2 m, and 3 m. Both vertical and horizontal polarizations were evaluated. A subject wearing a waist marker walked between the Tx and Rx antennas while being recorded by a camera. Marker positions obtained through image analysis were correlated with the received power.
The results confirmed attenuation caused by the torso and arms. Maximum attenuation increased as antenna separation decreased because shielding increased and diffraction was reduced.