Wednesday, September 17, 2014

Transmission Media -Cont

Satellite Communication
o    Satellite TX is much like line-of-sight transmission in which one of the stations is the
satellite orbiting around the earth
o    The principle is similar to the terrestrial microwave with a satellite acting as a Super
tall antenna and Repeater

o    Although in satellite TX, signals must still travel in straight line, the limitations
imposed on distance by curvature of earth are reduced
o    In this way satellites can span Continents and oceans with one bounce off the satellite
o    Satellite can provide TX capability to and from any location on earth no matter how
remote
o    This advantage makes high quality communication available to underdeveloped parts
of the worked at almost no cost
o    Satellites themselves are very expensive but leasing a freq or time on one can be
cheap

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