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A truncation method for modelling effective antenna patterns in urban areas

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Author: Mantel, O.C. · Rijken, M. · Matic, D. · Mawira, A.
Type:article
Date:2004
Source:Conference Proceedings - 7th European Conference on Wireless Technology, ECWT2004, 11-12 October 2004, Amsterdam, Conference code: 64932, 117-120
series:
Conference Proceedings - 7th European Conference on Wireless Technology, ECWT2004
Identifier: 238211
Keywords: Informatics · Cellular telephone systems · Energy transfer · Error analysis · Mathematical models · Mobile telecommunication systems · Parameter estimation · Polarization · Signal processing · Antenna beams · Cellular networks · Mobile networks · Truncation · Directional patterns (antenna)

Abstract

Signal level predictions for sector antennas in mobile networks strongly depend on the antenna pattern used in the prediction tool. For built-up areas, reflections and scattering often lead to a significant energy component at the back of the antenna, and the theoretical antenna pattern does not account for this effect. We propose a method that "truncates" the modelled antenna pattern at the back of the antenna, such that the Front-To-Back ratio of the pattern becomes smaller. A comparison of the method with measurements shows that this leads to an improved accuracy of the signal level predictions in an urban area.