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UHF/L-Band Airborne Blade Antenna

225 to 450 MHz & 960 to 1220 MHz

SKU: 21-50-16

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UHF/L-Band Airborne Blade Antenna

The 21-50-16 is a high performance combined UHF/L-band airborne blade antenna suitable for fixed and rotary wing aircraft.

Construction is from a one piece glass loaded thermoplastic blade molding intimately bonded onto an aluminum alloy base plate which provides RF grounding and attachment to airframe via 6 mounting 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 normally finished in lusterless grey urethane paint. The 21-50-16 can be used with CAL diplexer P/N 21-80-16. 

  • Covers EPLRS/UHF Com and TACAN/IFF Bands
  • High Isolation provided by external diplexer
  • High Strength, Lightweight Composite Blade
  • Low Side Area, Low Drag
  • 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
Model # 21-50-16
Brand Cooper Antennas
Frequency

UHF : 225 to 450 MHz

L-Band : 960 to 1220 MHz

Gain

UHF : ≥ +2 dBi

L-Band : ≥ +1 dBi 

VSWR

225-240 MHz ≤ 2.5:1

240-450 MHz ≤ 2.25:1

960-1220 MHz ≤ 1.8:1 

Impedance (nominal) 50 Ohms
Power

UHF : 50 Watts CW

L-Band : 100 Watts CW 2KW Peak

Polarization Vertical
Radiation Pattern Omni directional in azimuth 
Antenna RF Connector N Female
Antenna Shell Type  Glass loaded thermoplastic molded blade
Weight 9 inches (228mm) 
Side Loading  ≥ 6 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 Grey
  • Other finish options are available.
  • Please specify finish required when ordering.
Datasheet:

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