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Wide-band VHF/UHF Airborne Blade Antenna

30 to 512 MHz

SKU: 21-50-133

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Wide-band VHF/UHF Airborne Blade Antenna

The 21-50-133 is a vertically polarized, omni-directional antenna, compatible with all popular airborne radios operating within the 30 to 512 MHZ frequency range. This antenna can handle up to 50 Watts of power and requires no external tuning.

This wideband, multi-function antenna developed by Cooper Antennas Ltd is particularly suited to tactical military communications. Rugged design ensures reliability in world wide conditions of service on helicopters and subsonic aircraft.

Use of proprietary matching techniques optimizes efficiency and provides omnidirectional radiation throughout the operating frequency range. The element is DC grounded for lightning protection.

Model # 21-50-133
Brand Cooper Antennas

30 - 512 MHz (continuous coverage) 


30 MHz ≥ - 22 dBi

88 MHz ≥ - 14.0 dBi

108 to 174 MHz ≥ - 3 dBi average

225 - 512 MHz ≥ 0 dBi average 


≤ 2.5:1

Impedance (nominal) 50 Ohms

50 Watts CW




Azimuth : Nominally omni-directional

Elevation : Similar to a stub 

Antenna RF Connector

TNC Female

Antenna Shell Type High density foam filled epoxy/fiber glass shell with aluminum alloy top-tube set in aluminum alloy base. 
Height 9 inches (229 mm)
Weight 4.5 lbs (2.04 kg) 
Base Plate Shape Oval
Fixing Holes 10 x Ø 0.208 inch (5.3mm) holes, counter bored Ø 0.48 inches (12.2mm) 


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



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