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VHF/UHF AIrborne Blade Antenna

108 to 512 MHz

SKU: 21-50-38

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VHF/UHF AIrborne Blade Antenna

The 21-50-38 is a low height passive, top loaded airborne blade having the level of performance normally only achieved in significantly taller antennas.

Designed for use on rotary wing and high performance fixed wing aircraft operating up to Mach 1, this antenna covers the full VHF and UHF AM aircraft frequency bands.

Design comprises a shaped radiating element, top loaded for enhanced VHF gain, contained within a high strength glass-epoxy one-piece moulded shell. Proprietary matching circuits are employed and the antenna has a solid aluminium alloy baseplate with mountings compatible with AS3191, 37R2-U and similar antennas.

  • Low Profile
  • Excellent performance in low height (10.5”)
  • No Tuning required  High Strength Blade Antenna
  • Frequency Selective Passive Matching Network
  • High Environmental Integrity
  • Suitable for VHF-AM and UHF LOS Communications
  • Designed to MIL-STD-810
  • Footprint compatible with AS3191 and other common VHF/UHF airborne antennas
21-50-38
Model # 21-50-38
Brand Cooper Antennas
Frequency 108 - 512 MHz 
Gain  (typical) 

108 MHz ≥ -3 dBi

137 MHz ≥ +1 dBi

152 MHz ≥ -3 dBi

174 MHz ≥ -3.5 dBi

225 MHz ≥ +1 dBi

300 MHz ≥ +3 dBi

400 MHz ≥ +3 dBi

512 MHz ≥ 0 dBi 

VSWR ≤2.5:1
Impedance (nominal) 50 Ohms
Power 50 Watts CW
Polarization Vertical (nominal)
Radiation Pattern

Azimuth : Omni-directional nominal

Elevation : See graph 

Antenna RF Connector TNC Female
Antenna Shell Type High density foam filled epoxy/fibre glass shell set on aluminium alloy base plate 
Height 10.5 inches (267mm) 
Weight 4 lbs (1.8kg) max 
Base Plate Shape Tear drop 
Fixing Holes 6 x Ø 0.234 inch (5.9mm) holes, counter bored Ø 0.39 inches (9.9mm) 

Finish

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

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