Broadband VHF Airborne Blade Antenna

30 to 88 MHz

SKU: 21-20-10

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VHF High Power Antenna

The 21-20-10 is a vertically polarized, omni-directional antenna compatible with all popular airborne radios operating within the 30 MHz to 88 MHz frequency range. This antenna can handle 200 Watts of power and requires no external tuning. Use of a top loading element , centrally mounted on the blade, also enhances VHF performance beyond that of the standard AS-3191. Use of a surface deposited radiating element optimizes efficiency and the radiating element is DC grounded for lighting protection.

This wideband antenna developed by Cooper Antennas Ltd is particularly suited to tactical military communications. Rugged design ensures reliability in worldwide conditions of service on helicopters and aircraft operating at speeds up to Mach 0.85. 

  • High Strength Blade Antenna with performance enhancing top loading
  • Frequency Selective Passive Matching Network
  • Fully Foamed to Provide High Environmental Integrity
  • Aluminum Alloy Retaining Collar and Top Loading Bar Clamp
  • Drop-on Replacement for AT-1108 and AS-3191
  • Designed to MIL-STD-810 
21-20-10
Model # 21-20-10
Brand Cooper Antennas
Frequency 30 - 88 MHz 
Gain (typical) 

30 MHz ≥ - 12.5 dBi

50 MHz ≥ - 12.5 dBi

88 MHz ≥ - 8.0 dBi 

VSWR ≤ 2 .5:1 30 - 88 MHz
Impedance (nominal) 50 Ohms
Power 200 Watts CW 
Polarization Vertical
Radiation

Azimuth : Omni-directional (nominal)

Elevation : As stub (nominal)

Antenna RF Connector  N Female
Antenna Shell Type  High density foam filled epoxy/fibre glass shell set in aluminium alloy base collar  
Height 16 inches (407mm) max
Weight 5 lbs (2.27kg) 
Side Loading ≥ 8 psi ultimate 
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
  • Other finish options are available.
  • Please specify finish required when ordering.
Datasheet:

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