Transmission medium Guide, Meaning , Facts, Information and Description
A transmission medium is any material substance, such as fiber-optic cable, twisted-wire pair, coaxial cable, dielectric-slab waveguide, water, and air, that can be used for the propagation of signals, usually in the form of modulated radio, light, or acoustic waves, from one point to another.Note: By extension, free space can also be considered a transmission medium for electromagnetic waves, although it is not a material medium.
Source: From Federal Standard 1037C
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