booster amplifier(n = noun.artifact) booster, booster station, relay link, relay station, relay transmitter - an amplifier for restoring the strength of a transmitted signal;
is a kind of amplifier
is a part of communication equipment, communication system

amplifier, audio amplifier, booster, booster cable, booster dose, booster rocket, booster shot, booster station, booster unit, morale booster, takeoff booster