UHF Airborne Blade Antenna

320 to 960 MHz

SKU: 21-30-03

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UHF Airborne Blade Antenna

The 21-30-03 is a high performance combined UHF airborne blade antenna suitable for helicopters and aircraft operating up to Mach 1.

Construction is from a one piece, glass loaded thermoplastic molding intimately bonded onto an aluminum alloy base which houses the matching circuits and provides for very solid attachment to the airframe via 6 fixing holes drilled to match the AT-256 UHF antenna footprint.

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.

  • Covers UHF Telemetry Bands
  • High Strength Composite Blade
  • Low Side Area, Low Drag
  • Single ‘N’ Type Connector
  • Drop-on replacement for AT-256
  • Environmental Performance to MIL-STD-810
  • Foamed in place radiating element
21-30-03
Model # 21-30-03
Brand Cooper Antennas
Frequency 146-174 MHz 
Gain (typical)  + 2.5 dBi average, + 1 dBi minimum 
VSWR ≤ 2.5:1 
Impedance (nominal) 50 Ohms
Power 50 Watts CW 
Polarization Vertical (when mounted vertically)
Radiation Omni directional in azimuth plane 
Antenna RF Connector  N Female
Antenna Shell Type Glass loaded thermoplastic blade on an aluminum alloy base
Height 6.3 inches (160mm) 
Weight 0.8 lbs (0.37kg)
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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