VHF Airborne Blade Antenna

161.50 to 162.50 MHz

SKU: 21-20-18

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VHF Airborne Blade Antenna

The 21-20-18 is a high performance VHF airborne blade antenna suitable for aircraft operating in excess of Mach 2.

Construction is from a one piece fiberglass blade moulding intimately bonded into an aluminum alloy base block which houses the matching circuits and provides for very solid attachment to the airframe via 6 fixing holes drilled to the same pattern as the AT-256 UHF antenna.

The metal base block also enables the 21-20-18 to meet the lightning protection requirements of AS-3191/A.

Internal radiating element are shaped in such a way as to produce minimum VSWR and also to optimize radiation. The antenna assembly is sealed by closed cell foam and finished in lusterless black or grey urethane paint. 

21-20-18
Model # 21-20-18
Brand Cooper Antennas
Frequency 161.50 MHz to 162.50 MHz 
Gain (typical)  +4 dBi when mounted at center of an 8 foot (2.4m) minimum diameter ground plane. 
VSWR ≤ 2.5:1 
Impedance (nominal) 50 Ohms
Power 100 Watts CW 
Polarization Vertical (when mounted vertically) 
Radiation Omni directional in azimuth plane
Antenna RF Connector  N Female
Antenna Shell Type  Epoxy/fiberglass blade in aluminum alloy base collar 
Height 9 inches (229mm)
Weight 0.9 lbs (0.4kg) 
Side Loading ≥ 8 psi ultimate 
Base Plate Shape Diamond shape 
Fixing Holes 6 x Ø 0.203 inch (5.2mm) holes, counter bored Ø 0.43 inches (10.9mm)

Finish

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

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