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Broadband Airborne Blade Antenna

30 to 512 MHz & 960 to 2500 MHz

SKU: 21-50-56-1

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Broadband Airborne Blade Antenna

The 21-50-56-1 is a vertically polarized, omni-directional antenna, compatible with airborne radios operating within the 30 to 512 MHz frequency range plus Link16, Tacan, IFF, JTIDS and other L-band systems.

This antenna is constructed as a one-piece, high strength radomes built using high temperature resin and woven fibre glass and has an operating side load acceptance of 8 p.s.i. As such, it is suitable for use on subsonic and supersonic aircraft operating in excess of Mach 2.5.

The element is DC grounded for high voltage transfer protection. 

  • Suitable for Mach 2.5+
  • Passive design-requires no external tuning
  • Fully Foamed to Provide High Environmental Integrity
  • Aluminum Alloy Retaining Collar Accepts High Side Loading
  • Drop-on Replacement for AT-1108 & AS3191
  • Suitable for AN/ARC-210, AN/ARC-231 and Similar Multi-Mode Radios
  • Designed to MIL-STD-810  
21-50-56-1
Model # 21-50-56-1
Brand Cooper Antennas
Frequency

30 - 88 MHz,

108 - 174 MHz,

225 - 512 MHz

960 - 2500 MHz

Gain

30 MHz ≥ -23.0 dBi

60 MHz ≥ -18.0 dBi

88 MHz ≥ -10.0 dBi

118 MHz ≥ -7.0 dBi

156 MHz ≥ -2.0 dBi

174 MHz ≥ -1.0 dBi

225-512 MHz ≥ 0 dBi average

960-2500MHz +2dBi average 

VSWR

≤ 2.5:1 30 - 88 MHz

≤ 3.0:1 108 - 117 MHz

≤ 2.5:1 118 - 174 MHz & 225 - 400 MHz

≤ 2.75:1 401 - 512 MHz

≤ 2.0:1 960 - 2500 MHz 

Impedance (nominal) 50 Ohms
Power

V/UHF - 50 Watts CW,

L-band - 100 Watts

Polarization Essentially vertical (when mounted vertically) 
Antenna RF Connector

V/UHF - TNC Female

L-Band - N Female 

Antenna Shell Type High density foam filled epoxy/fiber glass shell set in aluminum alloy base collar 
Height 14.75 inches (375mm) 
Weight 4.5 lbs (2.05kg) 
Side Loading  ≥8 psi operating limit load over - 70 to + 135ºC (+ 155°C short term) 
Base Plate Shape Tear drop
Fixing Holes 6 x Ø 0.200 inches (5mm) holes, counter bore 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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