Propagation of Microwaves Thought Atmospheric Environment

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Ho Chi Minh City University of Technology and Education, Vietnam

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DIMES Department of University of Calabria, Italy

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Propagation of Microwaves Thought Atmospheric Environment

Miroslav Kocifaj, Ivan Martincek

DOI:

Abstract

Wireless microwave systems tend to have high availability figures, but at the expense of the ability to operate at higher data rates. A quality of free space communication depends on atmospheric conditions. It is shown that microwave attenuation reacts sensitively on changes of changes of hydrometeor size distribution. However, a signal transmission is also significantly affected by both, refractive index and shape of hydrometeors. Non-spherical particles attenuate radiation at frequencies higher than about 200 GHz more effectively than volume equivalent spheres. On the other hand, the non-spherical ice phase hydrometeors form weakly attenuating media at v < 150 GHz. The quality of microwave signal transmission thought icy cloud is therefore much better as when the communication path is realized through rainy atmosphere (the particle sizes are assumed to be the same in both cases).