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UHF/L-Band Airborne Antenna

225 to 512 & 950 to 1220 MHz

SKU: 21-50-06-20

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UHF/L-Band Airborne Antenna

The 21-50-06-20 is a high performance combined UHF/L-band airborne blade antenna suitable for aircraft operating in excess of Mach 2. It is also ideal for use on aircraft subjected to roughrunway operation where both a protective leading edge strip and the solid aluminum alloy base block protect against debris impact.

Construction is from a one piece fiberglass blade molding intimately bonded into an aluminum alloy base block which houses the matching circuits and provides for very solid attachment to airframe via 8 fixing holes.

Radiating elements are surface deposited silvery epoxy 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 for reliable operation in world-wide conditions of service. 

  • Covers standard UHF Com, TACAN, IFF Bands
  • High Isolation provided by external diplexer
  • High Strength Composite Blade with Aluminum Alloy Base Block
  • Low Side Area, Low Drag
  • Leading Edge Protection for Rough Field Operation
  • Meets Lightning Strike Criteria of AS-3191
  • Environmental Performance to MIL-STD-810, MIL-E-5400 
21-50-06-20
Model # 21-50-06-20
Brand Cooper Antennas
Frequency

UHF : 225 to 512 MHz

L-Band : 950 to 1220 MHz

Gain

UHF : with in 1.5 dB of λ/4 stub

L-Band : with in 1.6 dB of λ/4 stub 

VSWR

UHF : 225 - 512 MHz ≤ 2.5:1

L-Band : 960-1220 MHz ≤ 2.0:1 

Impedance (nominal) 50 Ohms
Power

UHF : 45 Watts CW

L-Band : 2 Watts average 2.5 kWatts Peak 

Polarization Vertical (when mounted vertically) 
Radiation Pattern Omni directional in azimuth plane to ± 1 dB 
Antenna RF Connector UHF TNC Female L-Band TNC Male 
Antenna Shell Type  Epoxy/fiber glass blade in aluminum alloy base collar 
Height 7.73 inches (196mm) 
Weight 1.63 lbs (0.74kg) 
Side Loading ≥ 8 psi ultimate
Base Plate Shape Oval shape 
Fixing Holes  8 x Ø 0.208 inch (5.28mm) holes, counter sunk 100°.

Finish

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

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