Terrestrial Microwave
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Terrestrial microwave communication employ's earth based transmitters and recievers.The frequencies used in it are in the low-gigahertz rang, which limit all communications to line-of-sight.Microwave transmissions use a parabolic antenna that produces a narrow, highly directional signal.Terrestrial microwave system does not use cables, microwave links often connect separate buildings where cabling would be too expensive, difficult to install or prohibited.
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