High Gain Stacked Dipole Array

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The 21-40-81 is a co-linear stack of “3 dimensional” dipoles phased in such a way as to provide high gain at zero degrees elevation. The precision machined dipoles are contained within a high strength glass epoxy cylindrical radome and the entire assembly is foam filled for long term environmental protection.

The 21-40-81 is suitable for use on aircraft operating up to 350 knots.

+6 dBi Gain
Low Silhouette
High strength
Designed to MIL-STD-810 environmental conditions
For helicopter and fixed wing aircraft up to 350 knots

	21-40-81
Model #	21-40-81
Brand	Cooper Antennas

Frequency	2.2 - 2.6 GHz
Gain	≥ +6dBiL
VSWR	2:1
Impedance (nominal)	50 Ohms
Power	50 watts
Polarization	Vertical
Antenna RF Connector	N Female

Height	15 inches (381mm) max
Diameter	2 inches (51mm)
Weight	2.5 lbs max (1.13kgs)
Fixing Holes	6 x Ø 0.25 inches (6.35mm) equi-spaced on a 5 inches (127.0mm) P.C.D.
Environmental
Designed to Environmental	MIL-STD-810