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Thursday, October 29, 2009

Communication Satellites / Electronic Birds

Communication Satellites / Electronic Birds:

Communication Satellites have made a very strong development on our day to day life. We, human being becomes its addict by using various technologist related to this invention. We use it various facilities such as Telephone, TV, Radio and Internet that usually take for granted have been possible due to the development in the field of communication satellite technology. These electronic birds revolving around the earth have tied the whole world together and made it look like a global village.

The main application areas of communication satellites include television broadcast, radio broadcast, and telephone and data communication services. Here, the satellite acts as a repeater station that provides either point-to-point or multipoint interactive services. The satellite receives a certain signal known as the uplink signal from the ground earth station. It cautions the signal back to earth after down converting the signal to a lower frequency and amplifying it before transmission.

Satellites have definite advantages over global networks, which include wide area coverage, mobile wireless communication independent of location, wide band-with, independence from global network and so on. About 80 percent of the international telephone traffic today goes via the satellite. The main advantage of using satellites for communication is their ability to provide broadcast connectivity and interactive connectivity.
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