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Antennetuner
From Wikipedia, the free encyclopedia
En antennetuner eller ATU (fra engelsk antenna tuning unit omtrent dansk "antennetilpasningsenhed") er en enhed, som kan kobles mellem en radiosender, radiotransceiver eller/og sjældnere radiomodtager - og transmissionslinjen, eller bedre mellem transmissionslinjen og radioantennen.
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/1/1d/Kenwood_AT-230_antenna-tuner-inside.jpg/640px-Kenwood_AT-230_antenna-tuner-inside.jpg)
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/a/a4/Ldg-antenna-tuner-0a.jpg/640px-Ldg-antenna-tuner-0a.jpg)
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/8/81/MFJ_tuner.jpg/640px-MFJ_tuner.jpg)
En antennetuner kaldes også: Antenna Matching Unit, Aerial Matching Unit (AMU), matchbox, transmatch, antenna coupler, Antenna Coupling Unit (ACU), Antenna System Tuning Unit (ASTU), Antenna System Correction & Tuning Unit (ASCTU).