Radio wave attenuation and scattering and absorption

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SUMMARY

Radio waves experience minimal attenuation in the atmosphere due to their propagation characteristics in a lossless dielectric medium. The atmosphere behaves similarly to a vacuum, allowing radio frequencies to travel with little scattering or absorption. This property is crucial for their use in information transmission, as it enables effective long-distance communication. The discussion also highlights the role of the ionosphere, which can influence radio wave propagation due to its conductive properties.

PREREQUISITES
  • Understanding of electromagnetic wave propagation
  • Basic knowledge of dielectric materials
  • Familiarity with the concept of the ionosphere
  • Fundamentals of radio frequency communication
NEXT STEPS
  • Research the properties of lossless dielectrics in electromagnetic theory
  • Study the effects of the ionosphere on radio wave propagation
  • Explore the principles of radio frequency communication systems
  • Learn about scattering and absorption mechanisms in different media
USEFUL FOR

Students beginning their studies in physics, telecommunications engineers, and anyone interested in the principles of radio wave propagation and communication technology.

ASidd
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I am trying to understand why radio waves are not greatly attenuated by the atmosphere due to scattering or absorption? I have tried searching the internet and can't find any satisfactory answers. Please help.
Oh and does this property somehow relate to why they are used to transmit information.
And I am only just starting physics so please explain in simple terms.
 
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ASidd said:
I am trying to understand why radio waves are not greatly attenuated by the atmosphere due to scattering or absorption? I have tried searching the internet and can't find any satisfactory answers. Please help.
Oh and does this property somehow relate to why they are used to transmit information.
And I am only just starting physics so please explain in simple terms.

Welcome to the PF.

For the most part, air (the atmosphere) is a lossless dielectric, with EM propagation very similar to a vacuum (free space). Why would you expect scattering and absorption at radio frequencies?

Are you instead thinking of the ionosphere? It is conductive enough to influence the propatation of radio waves...
 

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