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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 d B,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 d B.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 d B.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 d B,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.
Based on the 45 GHz millimeter-wave indoor communication measurement, the barrier diffraction characteristics of wood, mirror and white iron plate are studied. According to the barrier materials, three-ray and four-ray barrier diffraction models are proposed respectively. For 12 mm thick wood, 6 mm thick mirror and 0.35 mm thick white iron plate were used to measure the rectangular barrier diffraction.The experimental results show that the average transmission attenuation coefficient of 45 GHz millimeter wave is about -4.28 d B under the block of rectangular wood board and the attenuation measurement result The average error with the proposed four-ray model was -0.02 d B. The mean transmission attenuation coefficient for a 45 GHz millimeter wave was approximately -18.2 days at 0.35 mm thick rectangular white iron plate B. With the mirror away from the antenna , The average transmission attenuation in the face of the transmitting antenna is 1 to 2 dB larger than that in the case of the back transmitting antenna and the mirror face to the antenna is similar to the attenuation in the case of the white iron plate when it is facing the transmitting antenna.