relay station
Noun
Meaning
an amplifier for restoring the strength of a transmitted signal
Source: WordNetSynonyms
Hypernyms
Examples
A broadcast relay station performs an analogous role in broadcast radio and television.
A new microwave relay station to Mauritius is also in use, along with one Intelsat satellite-earth station.
See Shortwave relay station for the actual kinds of integrated technologies used to bring high power signals to listeners.