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ATU500SR 125W Vector Series Antenna Tuning Unit
Since introducing the world’s first totally solid state, high power radiobeacon in 1970, Nautel has supplied the highest quality and reliability in non-directional radio beacons. The most recent Vector Series Transmitters and Antenna Tuning Units continue this heritage and provide a dramatic improvement in system coverage. Highlights include:
Note: ATU500SR is shown with optional sunshield.
View Spec Sheet: ATU500SR - 125W Antenna Tuning Unit
Automatic Antenna Capacitance Tuning Using Dual Astatically Wound Loading Coils
The capacitive portion of the antenna impedance is automatically matched using dual astatically wound loading coils.
The dual astatic pair has a lower field than a single coil solution and this reduces eddy currents induced in the ATU enclosure.
Standard Adjustable Series Resistor Optimizes the Tradeoff Between Antenna Efficiency and Bandwidth
High ‘Q’ antenna systems, with narrow bandwidth, can cause undesirable sideband attenuation to the modulation frequency.
The optional internal series resistor bank allows for the insertion of resistance in series with the antenna to reduce the ‘Q’ of the antenna system and thereby increase the bandwidth of high ‘Q’ antenna systems.