TRANSMISSION MEDIA

A transmission medium (plural transmission media) is a material substance (solid, liquid, gas, or plasma) which can propagate energy waves. For example, the transmission medium for sound received by the ears is usually air, but solids and liquids may also act as transmission media for sound.


The term transmission medium can also refer to the technical device which employs the material substance to transmit or guide the waves. Thus an optical fiber or a copper cable can be referred to as a transmission medium.

A transmission medium can be classified as a:
Bounded/Guided   Waves are guided along a solid medium such as a transmission line.

1. CO-AX(Coaxial cable)
2. Twisted Pair
3. Optical fibre cable

Unbounded/Unguided  Transmission and reception are achieved by means of an antenna.

1. Microwave
2. radiowave
3. Infra red Ray
4. Xray
5. Gamma ray etc.