When information is sent by radio, the signal carrying the information must be increased in power to a level sufficient for successful transmission. The device that increases the signal level is an Amplifier .
Satellite communications is an example of a service that often requires large HPAs.
In addition to requiring a high signal level, many communication systems also require that the signal be amplified with a minimum of distortion. Highly linear amplifiers are essential for the efficient transmission of information. Most amplifiers are inherently non-linear. LTI accomplishes this by producing modules that correct an amplifier s distortion. These modules are called Linearizers.