Signal Losses of Outdoor-Indoor Wave Propagation Paths

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Revision with unchanged content. Since the introduction of sending and receiving emails or watching TV with mobiles en route, modern wireless broadcasting services require high data rates. However, increasing the information flow-rate requires that the opera­ting frequency is also increased. This gives rise to problems with providing good and constant signal strength to ensure that end user does not notice any interruptions. Previous investigations have detected that a significant sig­nal propagation path, the outdoor-indoor path, can be enormously distur­bed. From a technical point of view, the wave propagation through building openings, a window for example, should be unproblematic. But new win­dowpane systems consisting of metallic layers strongly affect the propagation path. Hence, it is unsure whether high frequency broadcasting systems can cover in-building environments. This book describes the theoretical and mathematical basics of wave pro­pagation and presents realistic measurement series, revealing the expecting signal losses for already existing and future broadcasting services.