Terrestrial
Microwave
: 2 types of antennas:
: Parabolic dish.
: Based on geometry of parabola.
: Works like a funnel (catching a wide range of
waves and directing to a common point call focus).
: Looks like gigantic scoop and horn.
: Outgoing transmission are broadcast up a stem
and deflected outward in a series of a narrow parallel beams by the scooped
shape of the horn.
: Parallel beams.
 |
| Parallel beam |
Satellite
: Same principle as terrestrial microwave
: Satellite acting as a super tall antenna and repeater.
: Single bounce
: Capability = any location on earth no matter how
remote.
: High quality communication without requiring a
huge investment in ground-based.
: Same speed as earth.
: Geosynchronous satellite = orbit speed is based
on distance from the planet.
: Minimum 3 satellites to provide full global
transmissions.
: Transmission from the earth to satellite ~ uplink
: Transmission from the satellite to earth ~ downlink
 |
| Single Bounce |
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