Airborne AIS Blade Antenna

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The 21-20-60 is a high performance VHF airborne blade antenna suitable for helicopter and sub-sonic aircraft intended for use with Automatic Identification Systems (AIS).

Mechanical design of the blade comprises an internal printed circuit, foamed-in-place into a high strength epoxy-glass radome fitted to an aluminum alloy base block having an integral mounting flange and finished in urethane lusterless grey.

Structural design ensures high side loading acceptance and long term reliability. Can operate up to 50,000 feet.

Covers AIS Frequencies
High Strength Composite Blade with Aluminum Alloy Base Block
Single ‘TNC’ Connector
Environmental Performance to MIL-STD-810
Fully sealed for environmental integrity.
DC Grounded

	21-20-60
Model #	21-20-60
Brand	Cooper Antennas

Frequency	160 MHz to 165 MHz
Gain (typical)	≥ +2 dBi
VSWR	≤ 2.0:1
Impedance (nominal)	50 Ohms
Power	25 Watts CW
Polarization	Essentially Vertical (when mounted vertically)
Radiation	Nominally omni directional in azimuth plane
Antenna RF Connector	TNC Female

Antenna Shell Type	Glass loaded thermo plastic blade
Height	7.75 inches (197mm)
Weight	1.8 lbs (0.81kg)
Side Loading	≥ 4 psi ultimate
Fixing Holes	6 x Ø 0.203 inches (5.16mm) holes