Presentation Information
[B-1A-29]Experimental Characterization of Angular Scattering from Rough Surfaces at 77.8 GHz
◎Koki Yajima1, Toshihisa Kamei1, Toru Yoshihara2, Koji Okazaki3, Kenichi Minamisono3, Kazuhiko Goukon3 (1. National Defense Academy of Japan, 2. REBOMIX LLC. , 3. SoftBank Corp.)
Keywords:
Millimeter-Wave Measurement,Rough Surface Scattering,Non-line of Sight
With the advancement of wireless communication systems, improving performance in non-line-of-sight (NLOS) environments has become increasingly important. In high-frequency bands such as millimeter waves, propagation is highly directional and susceptible to blockage, which has led to growing interest in utilizing electromagnetic scattering from surfaces such as walls and roadways. However, scattering from rough surfaces varies complexly depending on surface geometry and observation conditions, necessitating reliable measurement and evaluation methodologies.
In this study, scattered wave measurements of a rough surface sample were conducted in an anechoic chamber using measurement facilities provided by TÜV Rheinland Japan Ltd. The receiving antenna was fixed, while the transmitting antenna and the sample were rotated to measure the angular distribution of scattered power. Due to measurement uncertainties, the results are evaluated in a relative manner.
The measurement results show that incident waves are scattered over a wide angular range, while exhibiting strong angular dependence influenced by the surface height profile. The measured power levels remained above the −70 dBm sensitivity limit, indicating the validity of the measurement setup. Future work will extend this approach to field measurements.
In this study, scattered wave measurements of a rough surface sample were conducted in an anechoic chamber using measurement facilities provided by TÜV Rheinland Japan Ltd. The receiving antenna was fixed, while the transmitting antenna and the sample were rotated to measure the angular distribution of scattered power. Due to measurement uncertainties, the results are evaluated in a relative manner.
The measurement results show that incident waves are scattered over a wide angular range, while exhibiting strong angular dependence influenced by the surface height profile. The measured power levels remained above the −70 dBm sensitivity limit, indicating the validity of the measurement setup. Future work will extend this approach to field measurements.