Combined UHF/Data Link Airborne Blade Antenna
225 - 450 & 960 - 1850 MHz
The 21-50-17 is a high performance combined UHF/L-Band airborne blade antenna suitable for helicopters and aircraft operating in excess of Mach 2.5
Construction is from a one piece glass loaded thermoplastic blade molding intimately bonded into an aluminum alloy base block which houses the matching circuits and provides for very solid attachment to the airframe via 6 fixing holes drilled to the same pattern as the AT-256 UHF antenna.
The metal base block also enables the 21-50-17 to meet the lightning protection requirements of AS-3191/A.
Internal radiating element are shaped in such a way as to produce minimum VSWR and also to optimize radiation. The antenna assembly is sealed by closed cell foam and finished in lusterless black or grey urethane paint.
- Covers UHF Com, EPLRS and Link16 Band
- High Strength Composite Blade with Aluminum Alloy Base Block
- Low Side Area, Low Drag
- Single ‘N’ Type Connector
- Footprint replacement for AT-256
- Environmental Performance to MIL-STD-810
- Foamed in place radiating elements
225 MHz - 450 MHz
960 - 1850 MHz
|Gain||+1 to +4 dBi (UHF), +1 to +3 dBi (L-band) when mounted at center of an a 4 foot diameter ground plane.|
|Impedance (nominal)||50 Ohms|
100 Watts CW UHF
200 Watts CW, 2KW peak (L-band)
|Polarization||Vertical (Horizontal ≤ 10dB)|
|Radiation Pattern||Nominally Omni directional in azimuth plane|
|Antenna RF Connector||N Female|
|Antenna Shell Type||Glass loaded thermoplastic blade in aluminum alloy base collar|
|Height||9 inches (229mm)|
|Weight||0.9 lbs (0.4kg)|
|Side Loading||≥ 8 psi ultimate|
|Base Plate Shape||Diamond shape|
|Fixing Holes||6 x Ø 0.2 inch (5.08mm) holes, spot faced Ø 0.43 inches (10.9mm)|
- Urethane Lusterless Black Standard
- Other finish options are available.
- Please specify finish required when ordering.