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Wide-band VHF/UHF Airborne Blade Antenna

108-156 and 225-400 MHz

SKU: 21-50-124

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Wide-band VHF/UHF Airborne Blade Antenna

The 21-50-124 is a vertically polarized, omni-directional antenna, compatible with airborne transceivers operating within the 108 to 400 MHz frequency range. This antenna is passively matched and requires no external tuning.

This wideband, multi-function antenna developed by Cooper Antennas Ltd provides excellent performance within a small physical package of less than 10 inches in height. Rugged design ensures reliability in world wide conditions of service on helicopters and supersonic aircraft operating at Mach 2.5+

Use of frequency selective matching optimizes efficiency and provides omnidirectional radiation throughout the operating frequency range. Unique element shaping preserves elevation pattern throughout frequency band. 

Model # 21-50-124
Brand Cooper Antennas

108-156 MHz

225-400 MHz 


108 MHz -9.5 dBi

118 MHz -8.5 dBi

156 MHz -3.5 dBi

225-400 MHz +2 dBi average 


108-118 MHz ≤ 3.0:1

118-156 MHz ≤ 2.0:1

225-400 MHz ≤ 2.0:1 

Impedance (nominal) 50 Ohms

35 Watts CW




Azimuth : Omni-directional

Elevation : As stub 

Antenna RF Connector

N Female

Antenna Shell Type High density foam filled epoxy/fiber glass shell set onto aluminum alloy base.
Height 9.85 inches (250mm) max 
Weight 3.5 lbs (1.6kg) 
Base Plate Shape Approximately Elliptical 
Fixing Holes 10 x Ø 0.208 inch (5.3mm) holes, counter bored Ø 0.48 inches (12.2mm)


  • Antenna - Lusterless White Urethane
  • Other finish options are available.
  • Please specify finish required when ordering.



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