Wideband VHF/UHF Airborne Blade Antenna

20 to 500 MHz

SKU: 21-50-03

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Wideband VHF/UHF Airborne Blade Antenna

The 21-50-03 is a vertically polarized, omni-directional antenna, compatible with airborne receivers operating within the 20 to 500 MHZ frequency range. This antenna is passively matched and requires no external tuning.

This wideband, multi-function antenna developed by Cooper Antennas Ltd is particularly suited for use in VHF/UHF arrays. Rugged design ensures reliability in world wide conditions of service on helicopters and subsonic aircraft.

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. 

  • High Strength Broadband Top-loaded Blade Antenna
  • Passive Matching Network
  • Requires no external tuning
  • Fully Foamed for High Environmental Integrity
  • Suitable for use in DF arrays
  • Designed to MIL-STD-810
21-50-03
Model # 21-50-03
Brand Cooper Antennas
Frequency 20 - 500 MHz 
Gain (typical)

20 MHz ≥ -38 dBi

30 MHz ≥ -28 dBi

88 MHz ≥ -6 dBi

108 MHz ≥ -2 dBi

130-174 MHz ≥ 0 dBi

225-500 MHz ≥ 0 dBi average 

VSWR

≤ 3.5:1 20 - 30 MHz

≤ 3:1 30 - 500 MHz 

Impedance (nominal) 50 Ohms
Power 5 Watts CW 
Phase/Amplitude matching These antennas can be selected for phase and amplitude matching for use in DF systems, either to a “Golden Standard” or in sets. 
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 with aluminium alloy top loading bar 
Height 14.75 inches (375mm) 
Weight 5.16 lbs (2.34kg) 
Base Plate Shape Tear drop 
Fixing Holes  10 x Ø 0.208 inch (5.3mm) holes, counter bored Ø 0.48 inches (12.2mm) 

Finish

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

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