Summary
International Symposium on Antennas and Propagation
2009
Session Number:1B1
Session:
Number:1B1-5
Effect of Element Patterns on Diversity Reception
Fumihiro TERADA, Mitoshi FUJIMOTO, Toshikazu HORI,
pp.65-68
Publication Date:2009/10/21
Online ISSN:2188-5079
Summary:
Land mobile propagation channels become a multipath propagation due to reflection, diffraction, and scattering caused by the topography around mobile stations. The strength of the reception signal changes according to the time and place, and the reception performance deteriorates when mobile terminals move in such a multipath propagation environment. The diversity reception technique is used as a countermeasure to fading, and the correlation coefficient is used to evaluate the diversity effect. The diversity effect can generally be estimated from the signal correlation between branches. However, this evaluation procedure takes a significant amount of time to estimate the diversity effect using computer simulation since it considers not only the antenna characteristics but also the propagation characteristics. We can obtain an estimate more efficiently if the diversity effect can be estimated from the antenna characteristics of the respective branches [1]. In this paper, the effects of the antenna element spacing and distortion of the directional patterns on the diversity reception are considered in a basic study to estimate the diversity effect from the antenna characteristics. First, the effect of the antenna element spacing on the diversity reception is considered. Next, the effects of the fluctuation width and variation period of the directional patterns on the diversity reception are considered.