2 db per kilometer the bands are about 25000 35000

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Unformatted text preview: kilometer. The bands are about 25,000-35,000 gigaherz wide. Signals can be sent thousands of kilometers with negligible distortion. O ptical interfaces can be passive or active. Passive: Active Passive Star broadcast: UNGUIDED MEDIA Free space propagation - Excluding losses, received signal power falls inversely with square of distance. Inverse square law does not correspond to dB per kilometer - 6 dB per doubling of the distance. Long distance radio transmission. At low carrier frequencies, signals propagate around earth’s curvature, increasing the range. At higher...
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This note was uploaded on 01/26/2014 for the course EE 362 taught by Professor Laporta during the Fall '08 term at Pennsylvania State University, University Park.

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