WAVE PROPAGATION AND ANTENNAS (original) (raw)
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The paper discusses wave propagation in radio communications, detailing direct and sky wave propagation with emphasis on their characteristics and factors affecting performance. It explains antenna functionality, types, and polarization, relating them to effective signal transmission in various environments. Additionally, it touches upon engineering principles in antenna design and their implications for communication systems.
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IEE Proceedings - Microwaves, Antennas and Propagation, 2000
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2002
This article presents a case study of potential interference from a 2-GHz transmitter in the Deep Space Network (DSN) station in Robledo, Spain, to the International Mobile Telecommunications (IMT)-2000 mobile receivers in the city of Madrid about 50 km away. This study has included the effect of terrain between Robledo and Madrid in evaluating the propagation modes, which include diffraction over the terrain, ducting through the atmosphere, and scattering by rain. It is a complete revision of a previous study wherein preliminary analysis of these phenomena was presented without taking the specific terrain into account. The predicted results concerning diffraction are consistent with measurements and with predictions of the Longley–Rice model. Because of attenuation by the hills, the expected power received through diffraction by a mobile receiver on ground level in Madrid is lower than the interference thresholds (−109 dBm) when the DSN antenna transmits at the normal power of 20 k...
Microwave-line-of-sight-transmission.pdf
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