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Broadband Airborne Blade Antenna

30 to 400 MHz

SKU: 21-50-91

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Broadband Airborne Blade Antenna

The 21-50-91/92/93 are vertically polarized, omni-directional antennas, compatible with all popular airborne radios operating within the 30 to 400 MHz frequency range. These antennas can handle 100 Watts of power and require no external tuning.

These wideband, multi-function antennas developed by Cooper Antennas Ltd are particularly suited to tactical military communications. Rugged design ensures reliability in world wide conditions of service on aircraft operating at speeds up to Mach 1.0.

Use of a surface deposited radiating element optimizes efficiency. The element is DC grounded for lightning protection. 

  • High Strength Broadband Blade Antenna
  • Frequency Selective Matching Network
  • Fully Foamed to Provide High Environmental Integrity
  • Aluminum Alloy Retaining Collar Accepts High Side Loading
  • Designed to AS-3191/A & AS-3793/A (MIL -DTL-85670B) Specification
  • Drop-on Replacement for AT-1108
  • Suitable for AN/ARC-182, AN/ARC-186 and Similar Multi-Mode Radios
  • Complies with MIL-STD-810
  • 21-50-91 - NSN 5985-01-554-7183
  • Meets Requirements of 5985-01-121-6315, 5985-01-321-6182 5985-01-081-0222 & 5985-01-316-8084
21-50-91
Model # 21-50-91
Brand Cooper Antennas
Frequency

30 - 88 MHz,

108 - 174 MHz

225 - 400 MHz 

Gain

30 MHz ≥ -22.5 dBi

88 MHz ≥ -11.0 dBi

108 MHz ≥ -8.0 dBi

130 MHz ≥ -2.5 dBi

174 MHz ≥ 0 dBi

225 MHz ≥ +2.5 dBi

300 MHz ≥ +4.0 dBi

400 MHz ≥ +3.0 dBi 

VSWR

≤ 2.5:1 30 - 88 MHz & 108 - 118 MHz

≤ 2.0:1 118 - 174 MHz & 225 - 400 MHz

Impedance (nominal) 50 Ohms for both ports 
Power

50 Watts CW 30 - 88 MHz & 118 - 174 MHz

100 Watts CW 225 - 400 MHz 

Polarization

Vertical

Radiation

Azimuth : Omni-directional

Elevation : As stub 

Antenna RF Connector

TNC Female

Antenna Shell Type High density foam filled epoxy/fiber glass shell set in aluminum alloy base collar
Height 14.65 inches (372mm) max 
Weight 3.5 lbs (1.6kg)
Side Loading  ≥ 8 psi ultimate 
Base Plate Shape Tear drop 
Fixing Holes 6 x Ø 0.234 inches (5.9mm) holes, counter bored top side Ø 0.39 inches (9.9mm)

Finish

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

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