Combined UHF Airborne Blade Antenna

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Combined UHF Airborne Blade Antenna

The 21-50-19 is a high performance upper UHF airborne blade antenna suitable for helicopters and fixed wing aircraft.

Construction is from a one piece glass loaded thermoplastic blade molding with an aluminum alloy baseplate which houses the matching circuits and provides for very solid attachment to the airframe via 6 fixing holes drilled to the same pattern as the AT-256 UHF antenna.

Internal radiating element are shaped in such a way as to produce minimum VSWR and also to optimize radiation. The antenna assembly is sealed by closed cell foam and finished in lusterless black or grey urethane paint

	21-50-19
Model #	21-50-19
Brand	Cooper Antennas

Frequency	400-1000 MHz continuous coverage
Gain	+2dBi
VSWR	≤ 2.5:1
Impedance (nominal)	50 Ohms
Power	50 Watts CW
Polarization	Vertical (Horizontal ≤ 10dB)
Radiation Pattern	Nominally Omni directional in azimuth plane
Antenna RF Connector	TNC Female

Antenna Shell Type	Glass loaded thermoplastic blade with aluminum alloy base plate
Height	6 inches (152mm)
Weight	0.75 lbs (0.34kg) max
Side Loading	≥ 8 psi ultimate
Base Plate Shape	Diamond shape
Fixing Holes	6 x Ø 0.2 inch (5.08mm) holes, spot faced Ø 0.43 inches (10.9mm)