• Share
  • Email
  • Embed
  • Like
  • Save
  • Private Content
P5e Satellite Communication
 

P5e Satellite Communication

on

  • 774 views

 

Statistics

Views

Total Views
774
Views on SlideShare
771
Embed Views
3

Actions

Likes
0
Downloads
26
Comments
0

1 Embed 3

http://www.slideshare.net 3

Accessibility

Categories

Upload Details

Uploaded via as Microsoft PowerPoint

Usage Rights

© All Rights Reserved

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Processing…
Post Comment
Edit your comment

    P5e Satellite Communication P5e Satellite Communication Presentation Transcript

    • P5e - Satellite communications
    • Transmitting and receiving
      • Microwaves are used.
      • Why is a different frequency used to send info back to Earth?
    • Revision - Frequency
      • Frequency is…
      • It is measured in…
    • The ionosphere
      • The ionosphere is…
      • Radio waves are _________ by it
      • Microwaves have a ________ frequency and pass through
    • Atmospheric effects
    • Diffraction If it were not for diffraction, there would be many areas where radio waves would not reach. Waves can still be detected even when they cannot travel in a straight line, from where they are being produced, to where they are to be received. This is because waves can be diffracted.
    • Diffraction The size of the gap affects the amount that the waves are diffracted. A large gap produces small diffraction. A small gap produces large diffraction.
    • Diffraction The size of the gap affects the amount that the waves are diffracted. Radio waves diffract easily and so they are very suitable for broadcasting. Long wave radio waves have a very long transmission range because they diffract around hills and over the horizon. A large gap produces small diffraction. A small gap produces large diffraction.
    • Diffraction of waves Don’t despair if you live behind a big hill! Short wave Long wave
    • Diffraction of waves at the dish Short wave Long wave
    • Amplitude modulation (AM)
    • Frequency modulation (FM)