VHF Airborne Blade Antenna

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The 21-20-331 is a vertically polarized, omni-directional antenna, compatible with all popular airborne radios operating within the 118 to 154 MHZ frequency range.

This antenna can handle up to 25 Watts of power. This antenna developed by Cooper Antennas Ltd is particularly suited to public service and ATC communications. Rugged design ensures reliability in world wide conditions of service on helicopters and subsonic aircraft.

Unique element shaping preserves elevation pattern throughout frequency band.

High Strength Broadband Blade Antenna
Full VHF/ATC Band operation
Fully Foamed for High Environmental Integrity
Suitable for high speed subsonic aircraft
Designed to MIL-STD-810 environmental conditions
TNC Female connector

	21-20-331
Model #	21-20-331
Brand	Cooper Antennas

Frequency	118 - 154 MHz
Gain (typical)	118 - 154 MHz -0 dBi average (-2dBi minimum)
VSWR	≤ 2.5:1
Impedance (nominal)	50 Ohms
Power	25 Watts CW
Polarization	Vertical (when vertically mounted)
Radiation	Azimuth : Nominally
Pattern	Omni-directional
Antenna RF Connector	TNC Female

Antenna Shell Type	High density foam filled epoxy/fiber glass shell set in aluminum alloy base.
Height	8.5 inches (216mm)
Weight	4 lbs (1.81kg) max
Fixing Holes	10 x Ø 0.208 inch (5.3mm) holes