VHF ATC Antenna

118 to 137 MHz

SKU: 21-20-41

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VHF ATC Antenna

The 21-20-41 is an externally mounted airborne VHF antenna operating in the civil ATC band.

A fiberglass rod with an internal element is fitted into an aluminum base which contains foamed-in place matching circuits capable of handling up to 50 Watts power.

The method of construction provides protection from world-wide military environmental conditions including high vibration, shock and temperature variations. 

  • Covers 118-137 MHz with high efficiency
  • Very lightweight
  • For helicopter and fixed wing aircraft up to 350 Knots
  • Glass/Epoxy – Aluminum construction
  • Small footprint
  • Designed to MIL-STD-810 Environmental conditions 
21-20-41
Model # 21-20-41
Brand Cooper Antennas
Frequency 118-137 MHz 
Gain (typical)  +2db 
VSWR ≤ 2.5:1 
Impedance (nominal) 50 Ohms
Power 50 Watts
Polarization Linear (vertical when vertically mounted)
Radiation Nominally omni directional in azimuth plane
Antenna RF Connector  TNC Female
Construction Fiberglass whip/ Aluminum base 
Height 18 inches (460mm) 
Weight 0.5lb (0.23kg) 
Base Plate Shape Tear drop
Fixing Holes 4 x Ø 0.170 inches (4.3mm) ±0.005 inches (0.127mm) holes, counter sunk at 100° Ø 0.280 inches (7.1mm). 

Finish

  • Urethane Gloss White
  • Other finish options are available.
  • Please specify finish required when ordering.
Datasheet:

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