VHF Airborne Blade Antenna

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VHF Airborne Blade Antenna

The 21-50-25 is a vertically polarized, omni-directional antenna, compatible with airborne radios operating within the 115 to 325 MHz frequency range. This antenna can handle 50 Watts of power and requires no external tuning.

This VHF antenna developed by Cooper Antennas Ltd is particularly suited to civil and military VHF communications. Rugged design ensures reliability in world wide conditions of service on aircraft operating at speeds up to Mach 0.95 The radiating element is DC grounded for lightning protection.

High Strength Broadband Blade Antenna
50 Watts Power Handling Capability
Low Loss Matching Network
Fully Foamed to Provide High Environmental Integrity
Aluminum Alloy Retaining Collar Accepts High Side Loading
Drop-on Replacement for AT-1108
Meets DO-160 Lightning Indirect Effects (LITS) requirements
Complies with MIL-STD-810
DC Grounded for P-Static Protection

	21-50-25
Model #	21-50-25
Brand	Cooper Antennas

Frequency	115 - 325 MHz
Gain	0 dBi average 115 - 225 MHz + 3 dBi average 225 - 325 MHz
VSWR	≤ 2.5:1
Impedance (nominal)	50 Ohms
Power	50 Watts CW
Polarization	Vertical
Radiation Pattern	Azimuth : Omni-directional Elevation : As stub
Antenna RF Connector	N Female

Antenna Shell Type	High density foam filled epoxy/fibre glass shell set in aluminum alloy base collar
Height	14.75 inches (375mm)
Weight	4 lbs (1.8kg)
Side Loading	≥ 8 psi ultimate
Base Plate Shape	Tear drop
Fixing Holes	6 x Ø 0.200 inches (5mm) holes, counter sunk at 100° Ø 0.39 inches (9.9mm)