Abstract
In this paper, four kinds of block diffraction models were proposed on the basis of the uniform geometrical theory of diffraction, and these models were validated by experiments with 45 GHz millimeter wave in the laboratory. The results are in agreement with the theoretical analysis. Some errors exist in the measurement results because of the unsatisfactory experimental environment. Single conducting cylindrical block measurement error was less than 0.5 dB, and single man block measurement error in the school laboratory was less than 1 dB, while in the factory laboratory environment, the peak to peak error reached 1.6 dB. Human body block attenuation was about 5.9–9.2 dB lower than that of the single conducting cylinder. A human body and a conducting cylinder were used together as a block in model (c) and model (d), but the positions of the cylinder in the two models were different. The measurement results showed that the attenuation of model (d) is about 3 dB higher than that of model (c).
Highlights
Exploiting new spectrums for cellular communication to boost its capacity to Gigabit is the main issue faced by the generation (5G) of mobile communication [1,2], and is considered a problem of wide concern
The blocking effect of the human body is one of the key issues to be considered in millimeter wave communication
There is an obvious sudden change at 4 m, which should be caused by the multipath effect in the laboratory environment
Summary
Exploiting new spectrums for cellular communication to boost its capacity to Gigabit is the main issue faced by the generation (5G) of mobile communication [1,2], and is considered a problem of wide concern. The blocking effect of the human body is one of the key issues to be considered in millimeter wave communication. Several scholars reported the diffraction and scattering of a high frequency wave by a cylinder block [9,10]. Tzaras presented a new formulation of the theory of diffraction (UTD) was proposed. Edge diffraction is an important issue in millimeter achieving very accurate results. Four kinds of 45GHz millimeter wave cylindrical block measurement models were. Four kinds of 45 GHz millimeter wave cylindrical block measurement models were proposed. A series of measurements identifying the signal attenuation at 45 GHz under the cylindrical cylindrical and human body block were carried out. The diffraction properties of a 45 GHz millimeter and human body block were carried out.
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