Propagation of Electromagnetic Waves : Ground (Surface), Space & Sky (or) Ionospheric Propagation
Автор: Physics4students
Загружено: 2016-12-26
Просмотров: 6342
Описание:
The propagation of electromagnetic waves depend on the
properties of the waves and the environment. Radio waves ordinarily
travel in straight lines except where the earth and its atmosphere alter
their path. The useful ranges of the electromagnetic spectrum for
communication are summarised in previous section.
Radio wave is propagated from the transmitting to the receiving
antenna mainly in three different ways depending on the frequency of
the wave. They are :
(i) Ground (surface) wave propagation
(ii) Space wave propagation
(iii) Sky wave (or) ionospheric propagation
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