Wide-band VHF/UHF Airborne Antenna

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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