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Wide-band VHF/UHF Airborne Blade Antenna

30 to 512 MHz

SKU: 21-50-31

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Wide-band VHF/UHF Airborne Blade Antenna

The 21-50-31 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 100 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 a surface deposited radiating element optimizes efficiency and provides omni-directional radiation throughout the operating frequency range. The element is DC grounded for lightning protection. 

  • High Strength Broadband Toploaded Blade Antenna
  • Frequency Selective passive Matching Network
  • Requires no external tuning
  • Fully Foamed for High Environmental Integrity
  • Suitable for AN/ARC-182, AN/ARC-210 and Similar Multi-Mode Radios
  • Complies with MIL-STD-810  DC Grounded 
21-50-31
Model # 21-50-31
Brand Cooper Antennas
Frequency

30 - 88 MHz

108 - 174 MHz

225 - 512 MHz

Gain

30 MHz ≥ - 24.0 dBi

88 MHz ≥ - 12.0 dBi

108 MHz ≥ - 6.0 dBi

130 MHz ≥ - 2.5 dBi

174 MHz ≥ 0 dBi

225-512 MHz ≥ 0 dBi average 

VSWR

≤ 2.5:1 30 - 88 MHz

≤ 2.5:1 108 - 174 MHz

≤ 2.5:1 225 - 512 MHz  

Impedance (nominal) 50 Ohms
Power

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

100 Watts CW 225 - 512 MHz 

Polarization Vertical
Radiation Pattern Azimuth : Omni-directional Elevation : As 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 10 inches (254mm) 
Weight 4 lbs (1.82kg) 
Base Plate Shape Oval
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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