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UHF/L-Band Airborne Blade Antenna

225 to 450 MHz & 960 to 1220 MHz

SKU: 21-50-16-1

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UHF/L-Band Airborne Blade Antenna

The 21-50-16-1 is a high performance combined UHF/L-band airborne blade antenna suitable for subsonic and supersonic aircraft. It also is ideal for use on aircraft subjected to rough-runway operation where both a metal leading edge capping and the solid aluminum alloy base block protect against debris impact.

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 airframe via 6 fixing holes drilled to the same pattern as the AT-256 UHF antenna.

Integral radiating elements are shaped in such a way as to produce minimum VSWR in both UHF and L-band and also to optimize radiation pattern at L-band where the antenna would otherwise be electrically too long.

The antenna assembly is sealed by closed cell foam and finished in lusterless grey urethane paint.

The 21-50-16-1 can be used with CAL diplexer P/N 21-80-16-1. 

  • Covers EPLRS/UHF Com and TACAN/IFF/LINK16
  • High Isolation provided by external diplexer
  • High Strength Composite Blade with Aluminum Alloy Base
  • Low Side Area, Low Drag
  • Polyurethane leading edge protection
  • Single ‘N’ Type Connector
  • Drop-on replacement for AT-256, NSN’s 5985-01- 418-6105 and 5985-01-331-8710  Environmental Performance to MIL-STD-810 
21-50-16-1
Model # 21-50-16-1
Brand Cooper Antennas
Frequency UHF :  225 to 450 MHz 
Gain

UHF : ≥ 0 dBi

L-Band : ≥ 0 dBi 

VSWR

225-240 MHz ≤ 2.5:1

240-450 MHz ≤ 2.0:1

960-1220 MHz ≤ 1.8:1 

Impedance (nominal) 50 Ohms
Power UHF : 100 Watts CW 
Polarization Vertical
Radiation Pattern Omni directional in azimuth 
Antenna RF Connector N Female
Antenna Shell Type  Glass loaded thermoplastic blade in aluminum alloy base collar 
Height 7.95 inches (202mm) 
Weight 1 lb (0.45kg) 
Side Loading  ≥ 8 psi ultimate 
Base Plate Shape Diamond shape  
Fixing Holes 6 x Ø 0.205inch (5.2mm) holes, counter bored Ø 0.39 inches (9.9mm)

Finish

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

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