Signal Losses of Outdoor-Indoor Wave Propagation Paths - Signal Fading through Modern Window Systems

Since the introduction of sending and receiving emails or watching TV withmobiles en route modern wireless broadcasting services require high datarates. However increasing the information flow-rate requires that the operatingfrequency is also increased. This gives rise to problems with providinggood and constant signal strength to ensure that end user does not noticeany interruptions. Previous investigations have detected that a significant signalpropagation path the outdoor-indoor path can be enormously disturbed.From a technical point of view the wave propagation through buildingopenings a window for example should be unproblematic. But new windowpanesystems consisting of metallic layers strongly affect the propagationpath. Hence it is unsure whether high frequency broadcasting systems cancover in-building environments.This book describes the theoretical and mathematical basics of wave propagationand presents realistic measurement series revealing the expectingsignal losses for already existing and future broadcasting services.