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Dual Band VHF/UHF Airborne Blade Antenna

116-174 and 225-512 MHz

SKU: 21-50-27-1

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Dual Band VHF/UHF Airborne Blade Antenna

The 21-50-27-1 is a vertically polarized, omni-directional antenna, compatible with airborne radios operating within the 116 to 174 and 225 to 512 MHz frequency ranges. The antenna can handle 25 watts of power, requires no external tuning and is designed as a drop on replacement for AT1108/37R-2U types but having greater isolation between bands and better omni-directivity.

This dual band antenna is suited to military and civil aircraft applications where its rugged design ensures reliability in world wide conditions of service at speeds up to Mach 0.95.

The radiating element is DC grounded for static protection. 

  • High Strength
  • High isolation between VHF and UHF outputs
  • Fully Foamed for High Environmental Integrity
  • Aluminum Alloy Retaining Collar Accepts High Side Loading
  • Drop-on Replacement for AT-1108, 37R-2U and Chelton 12-17-4
  • Designed to MIL-STD-810
  • Excellent omnidirectional azimuth pattern
21-50-27-1
Model # 21-50-27-1
Brand Cooper Antennas
Frequency 116-174 MHz (VHF) & 225 - 512 MHz (UHF) 
Gain

  0 dBi average VHF

+2 dBi average UHF

VSWR

≤ 2.5 VHF

≤ 2.25 UHF (2.5:1 460-512 MHz) 

Impedance (nominal) 50 Ohms
Power 25 Watts CW 
Polarization Vertical
Radiation Pattern Azimuth : Omni-directional Elevation : Similar to stub 
Antenna RF Connector

TNC Female UHF

BNC Female VHF 

Antenna Shell Type High density foam filled epoxy/fiberglass shell set in aluminum alloy base collar 
Height 14.65 inches max (372mm) 
Weight 4.0 lbs max (1.82kg) 
Side Loading  ≥ 8 psi ultimate 
Base Plate Shape Tear drop 
Fixing Holes 6 x Ø 0.234 inches (5.9mm) holes, counter bored top side Ø 0.39 inches (9.9mm) 

Finish

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

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