ADFA is a wideband omnidirectional active antenna covering 430–1160 MHz. It integrates a low-noise amplifier and a programmable filter bank with gain adjustable from −12 to +27 dB in 1 dB steps. Filters can be tuned for interference control and a fixed-band saw filter is available. Gain and filter settings are accessible locally via a TFT display or remotely through the RF coaxial link. The unit uses 50 Ω impedance with a rugged epoxy‑fiberglass housing.