Broadband VHF Airborne Blade Antenna

30 to 156 MHz

SKU: 21-20-06

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Broadband VHF Airborne Blade Antenna

The 21-20-06 is a vertically polarized, omni-directional antenna compatible with all popular airborne radios operating within the 30 MHz to 156 MHz frequency range. This antenna can handle 100 Watts of power and requires no external tuning. Use of a top loading element , which is shaped to prevent fouling of cables during ground handling and low level flight , also enhances VHF performance beyond that of the standard AS-3191 at the expense of UHF performance. Use of a surface deposited radiating element optimizes efficiency and the radiating element is DC grounded for lighting protection.

These wideband, multi-function antennas developed by Cooper Antennas Ltd are particularly suited to tactical military communications. Rugged design ensures reliability in world wide conditions of service on helicopters and aircraft operating at speeds up to Mach 0.5. 

  • High Strength Blade Antenna with performance enhancing top loading
  • Frequency Selective Passive Matching Network
  • No Tuning Required
  • Fully Foamed to Provide High Environmental Integrity
  • Drop-on Footprint Replacement for AT-1108 and AS-3191
  • Suitable for AN/ARC-186 and Similar Multi-Band VHF Radios
  • Designed to MIL-STD-810
  • Meets Requirements of  High Strength Blade Antenna with performance enhancing top loading  Frequency Selective Passive Matching Network  No Tuning Required  Fully Foamed to Provide High Environmental Integrity  Drop-on Footprint Replacement for AT-1108 and AS-3191  Suitable for AN/ARC-186 and Similar Multi-Band VHF Radios  Designed to MIL-STD-810  Meets Requirements of 5985-01-263-9905 
21-20-06
Model # 21-20-06
Brand Cooper Antennas
Frequency

30 - 88 MHz

108 - 156 MHz 

Gain (typical) 

30 MHz ≥ - 11.5 dBi

88 MHz ≥ 0.0 dBi

108 MHz ≥ - 3.0 dBi

156 MHz ≥ 0.0 dBi 

VSWR

≤ 2.5:1 30 - 88 MHz

≤ 2.5:1 108 - 156 MHz

Impedance (nominal) 50 Ohms
Power 100 Watts CW 
Polarization Essentially Vertical
Radiation

Azimuth : Omni-directional (nominal)

Elevation : As stub (nominal) 

Antenna RF Connector  BNC Female
Antenna Shell Type   High density foam filled epoxy/fibre glass shell set in aluminum alloy base collar 
Height 14.7 inches (373mm) 
Weight 14.7 inches (373mm) 
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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