UHF Airborne Blade Antenna
291.4 ± 0.5 MHz
The 21-30-24-1 is an airborne blade antenna designed for helicopters and high performance aircraft covering the UHF Sonobuoy Command frequency. It is a direct footprint replacement for AT256 UHF Blade antennas.
Electrical design is based on a 2-dimensional, monopole which is of high efficiency and provides nearly omni-directional azimuthal radiation.
Mechanical design uses an advanced, glass-loaded thermoplastic radome with an integral radiating element, all foamed-in-place for structural and environmental integrity.
The blade is built into a contoured base collar and has a centrally mounted, N-type female coaxial connector on an aluminium alloy baseplate to which the radiating element is DC grounded for p-static protection.
|Frequency||291.4 ± 0.5 MHz|
|Impedance (nominal)||50 Ohms|
|Power||30 Watts CW|
|Radiation||Omni-directional in azimuth, similar to stub in elevation|
|Antenna RF Connector||N Female|
|Antenna Shell Type||Glass loaded thermoplastic blade|
|Height||5.8 inches (147.3 mm) max|
|Weight||0.75 lbs (0.34 Kg) max|
|Side Loading||≥ 8 psi ultimate|
|Base Plate Shape||Diamond shape|
|Fixing Holes||6 x Ø 0.203 inch (5.2 mm) holes, counter bored Ø 0.43 inches (10.9 mm)|
- Urethane Lusterless Black
- Other finish options are available.
- Please specify finish required when ordering.