关于45GHz毫米波对矩形阻挡物的绕射研究

基于45 GHz毫米波室内通信测量对木板、镜子以及白铁板的阻挡绕射特性进行了研究.根据阻挡物材料的不同,分别提出三射线和四射线阻挡绕射模型.对12 mm厚的木板、6 mm厚的镜子以及0.35 mm厚的白铁板进行了矩形阻挡绕射测量实验.实验结果表明,在矩形木板阻挡下45 GHz毫米波的平均传输衰减系数约为-4.28 dB,其衰减测量结果与提出的四射线模型仿真结果平均误差为-0.02 dB.在0.35 mm厚的矩形白铁板阻挡下,45 GHz毫米波的平均传输衰减系数约为-18.2 dB.在镜子远离天线的情况下,面对发射天线时的平均传输衰减比背对发射天线时大1 ～2 dB,而在镜子靠近天线的情况下,其面对发射天线时测量的结果与白铁板阻挡下的衰减类似.

Research on Rectangular Block Diffraction on 45 GHz Millimeter Wave

The block diffraction attenuation characteristics of wood board,mirror and white iron board were studied based on 45 GHz millimeter wave indoor communication measurements.According to different block material,the 3-ray and 4-ray block diffraction models were proposed,respectively.The rectangular block diffraction measurement experiments were carried out on 12 mm thick wood board,6mm thick mirror,and 0.35 mm thick white iron board.Experiment shows that the average transmission attenuation coefficient of 45 GHz millimeter wave blocked by 12 mm thick rectangular wood board is about-4.28 dB,and the average error between the attenuation measurement results and the 4-ray model simulation results is about-0.02 dB.The average transmission attenuation coefficient of 45 GHz millimeter wave blocked by 0.35 mm thick rectangular white iron board is about-18.2 dB.In the case of the mirror far away from the antennas,the measured average transmission attenuation by the mirror surface is 1-2 dB larger than that of the negative one.When the mirror is near any set of antennas,the measured value by the mirror surface is similar to that of the white iron board.