UHF Airborne Blade Antenna

225 to 512 MHz

SKU: 21-30-43

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UHF Airborne Blade Antenna

The 21-30-43 is a UHF communications antenna capable of accepting high side loading intended for use on high speed aircraft . Its construction is from precision machined aluminum alloy with high strength FMS 1023 Lockheed approved fiberglass inserts. Having a low profile diamond shape raked blade structure minimizes drag for high speed applications and presents a low Radar Cross Section (RCS). The aluminum structure also lends itself to the application of certain types of ’stealth’ radar absorbing material.

The electrical design comprises a UHF sleeved unipole, with a DC grounded radiating element and lossless internal matching circuits.

Designed and constructed to meet MIL-STD-810 environmental conditions, the 21-30-43 is a drop-on footprint replacement for UHF blade type AT-256, having a single N-type Female connector. The antenna is normally finished in lusterless grey urethane paint. 

  • Suitable for sub-sonic and super-sonic aircraft.
  • Covers Full UHF military Communications Air Band.
  • Designed to MIL-STD-810 environment.
  • Single ‘N-type’ connector.
  • Rugged Aluminum Alloy construction.
  • Foot print replacement for AT-256 UHF blade.
  • Diamond shape for low RCS and low drag.
21-30-43
Model # 21-30-43
Brand Cooper Antennas
Frequency 225 - 512 MHz
Gain 225 - 512 MHz 0 dBi min +2 dBi average
VSWR ≤ 2.5:1 
Impedance (nominal) 50 Ohms
Power 100 Watts max
Polarization Vertical
Radiation Nominally omni directional in azimuth plane
Antenna RF Connector  N Female
Antenna Shell Type Diamond shaped aluminum alloy with fiberglass inserts  
Height 9 inches (229mm)
Weight 2.5 lbs 
Base Plate Shape Diamond shape drilled to replace AT-256 
Fixing Holes 6 x Ø 0.200 inches (5mm) holes, counter sunk at 100° Ø 0.39 inches (9.9mm) 

Finish

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

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