University of Twente Student Theses


Beamforming performance evaluation with impact of user model electric properties

Lomillos Rozeboom, I. (2020) Beamforming performance evaluation with impact of user model electric properties.

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Abstract:The Maximal Ratio Combining (MRC) output from a Uniform Linear Array (ULA) antenna in the proximity of the human body is analyzed with numerical simulations. The idealized situation is considered where the far-field radiated by a base station is a vertically polarized plane wave impinging on an infinite homogeneous cylinder emulating the human body. The antenna elements of the ULA are idealized isotropic radiators with no coupling between each other. The total electric field due to the plane wave and the scattered wave is computed using the expansion of the electromagnetic field in cylindrical vector wave functions. Two models of the equivalent dielectric material have been considered. Results are compared to a perfect electric conductor (PEC) material. Two figures of merit have been considered: where either the received power of the center element or the maximum power received by any of the elements is used. Frequencies of 1, 30 and 60 GHz for distances between ULA and cylinder of 10 and 20 cm. It is concluded that the two suggested approaches to compute the equivalent dielectric parameters of the cylinder are equivalent. It is shown that a PEC is a good approximation of the human equivalent model for these scenarios.
Item Type:Essay (Bachelor)
Faculty:EEMCS: Electrical Engineering, Mathematics and Computer Science
Subject:02 science and culture in general, 05 communication studies, 30 exact sciences in general, 33 physics, 50 technical science in general, 53 electrotechnology
Programme:Electrical Engineering BSc (56953)
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