By I.D. Poole
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Additional resources for Antennas for VHF and UHF (BP)
Trans. par. 17: Concrete wall (wall thickness 150 mm), vertical polarization ness 150 mm), horizontal polarization The figures show the attenuation of the reflection or the transmission over the angle of incidence ϕ, with the attenuation being 20 log |RW all | [dB] and 20 log |TW all | [dB] respectively. The results for the different polarization directions as a function of the angle of incidence indicate a sharp drop in the Brewster angle area. Otherwise the reflection factor increases from a minimum value of 0◦ to a maximum value of almost 90◦ .
7). References  R. G¨ o¨ock. Die groSSen Erfindungen. Deutschland, 1988. Siegloch Edition, K¨ unzelsau,  R. Klingler. Die Entwicklung des ¨ offentlichen Mobilfunks. In FIBA ¨ischer Mobilfunk, pp. 11–27, M¨ Kongress Europa unchen, February 1989. Mobile Radio Networks: Networking and Protocols. Bernhard H. 1). Therefore a total familiarity with the propagation characteristics of radio waves is a prerequisite in the development of mobile radio systems. In principle, the Maxwell equations explain all the phenomena of wave propagation.
2). The general rule is that the higher the frequency of the wave to be transmitted, the shorter the range. , larger wavelength, propagate as ground or surface waves. These waves can still be received from a great distance and even in tunnels. 1: Radio transmission path: transmitter–receiver. Z0 and ZW are the radio wave resistances in free space and on the antenna feeder link 28 2 1000 km Ground / surface waves LF 30 kHz 300 kHz Submarine Radio Navigation System Aspects 100-150 km Radio horizon Geom.