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Wide-band VHF/UHF Airborne Antenna

30 to 941 MHz

SKU: 21-50-331F04

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Wide-band VHF/UHF Airborne Antenna

The 21-50-331 is a vertically polarized, omni-directional antenna, compatible with all popular airborne radios operating within the 108 to 941 MHZ frequency range and with limited capability from 30-108 MHz. This antenna can handle up to 25 Watts of power and requires no external tuning.

This wideband, multi-function antenna developed by Cooper Antennas Ltd is particularly suited to public service, para-military and tactical military communications. Rugged design ensures reliability in world wide conditions of service on helicopters and subsonic aircraft.

Use of proprietary matching techniques optimizes efficiency and provides omni-directional radiation throughout the operating frequency range. Unique element shaping preserves elevation pattern throughout frequency band. 

  • High Strength Broadband Blade Antenna
  • Frequency Selective passive Matching Network
  • Requires no external tuning
  • Fully Foamed for High Environmental Integrity
  • Suitable for wide band Multi-Mode Radios - optimized VHF/AM minimal VHF/Low band performance
  • Designed to MIL-STD-810 environmental conditions
  • Twin connectors for V/UHF and UHF Hi Band
21-50-331F04
Model # 21-50-331
Brand Cooper Antennas
Frequency

30 - 512 MHz

512 - 941 MHz 

Gain

108 - 174 MHz -3 dBi average

(-2dBi minimum 118-137 MHz)

225 - 512 MHz + 1 dBi average

512 - 941 MHz 0 dBi average

VSWR ≤ 2.5:1 
Impedance (nominal) 50 Ohms
Power 25 Watts CW
Polarization Vertical (when vertically mounted) 
Radiation Pattern Azimuth : Nominally Omni-directional Elevation : See graphs
Antenna RF Connector

N-Type Female ( 30 - 512 MHz)

TNC Female ( 512 - 941 MHz) 

Antenna Shell Type High density foam filled epoxy/fiber glass shell set in aluminum alloy base. 
Height 9.4 inches (239mm) max
Weight 3 lbs (1.36kg) max
Fixing Holes 10 x Ø 0.208 inch (5.3mm) holes

Finish

  • Antenna -  Lusterless black urethane FED-STD 595 Code 37038
  • Other finish options are available.
  • Please specify finish required when ordering.
Datasheet:

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