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Mention of bandwidth of transmission medium for coaxial cable, free space and optical fibers. |
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Answer» Similar to message signals, different types of transmission media offer different bandwidths. The commonly used transmission media are wire, free space and fiber optic cable. (a) Bandwidth of cable wire : Coaxial cable is a widely used wire medium, which offers a bandwidth of approximately 750 MHz. Such cables are normally operated below 18 GHz. (b) Bandwidth in free space : Communication through free space using radio waves takes place over a very wide range of frequencies: from a few hundreds of kHz to a few GHz. (c) Bandwidth of optical fiber : Optical communication using fibers is performed in the frequency range of 1 THz to 1000 THz (microwaves to ultraviolet). An optical fiber can offer a transmission bandwidth in excess of 100 GHz. |
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