Glossary definition of Microwave

Microwave is the range of radio frequencies between about 1 GHz to 30 GHz (i.e. wavelengths of 300 mm to 10 mm). Microwave links are common in telecommunication networks, as they are a cheap and easy way of connecting points within the network where there is a clear line of sight between transmitter and receiver.

Examples of use are cellular phone carriers' point-to-point and point-to-multipoint communications, the nationwide distribution of radio and TV channels, and radio links between earth stations and orbiting satellites. Due to their high frequency, microwaves share many characteristics with radiation in the optical region: they can be focused into a narrow beam, reflected or absorbed by obstacles in their path, or have their power reduced by atmospheric conditions such as rain.