An Antenna tuning unit (ATU) (and any of the names in the list below) is a device that is inserted between a radio transmitter and its antenna; when properly adjusted (tuned) it improves power transfer by matching the impedance of the radio to the impedance of the antenna, as it appears end of the feed line connected to the antenna tuner, with the other end connecting to the antenna. (Travel through a feed line usually causes impedance at either end of the feed line to be different.)

The following names are all equivalent: Antenna tuner ,matching network, (antenna) impedance matching unit, matchbox, trans match, antenna tuning unit (ATU), antenna coupler, feed line coupler

Refurbished antenna tuning unit (ATU) products sourced for your maritime needs. All equipment undergo rigorous testing by our engineers.
All Antenna tuning unit (ATU) are maintained, refurbished and fully tested to ensure the quality and reliability of the equipment. For further information about refurbished, new and reconditioned antenna tuning unit (ATU), which model our marine experts would recommend for your vessel, please contact