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Combined UHF/Data Link Airborne Blade Antenna

225 - 450 & 960 - 1850 MHz

SKU: 21-50-17

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Combined UHF/Data Link Airborne Blade Antenna

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
21-50-17
Model # 21-50-17
Brand Cooper Antennas
Frequency

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. 
VSWR ≤ 2.5:1 
Impedance (nominal) 50 Ohms
Power

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) 

Finish

  • Urethane Lusterless Black Standard
  • Other finish options are available.
  • Please specify finish required when ordering.
Datasheet:

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