VHF/FM Airborne Antenna SINCGARS/BOWMAN

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The 21-20-36 is an externally mounted airborne VHF/FM antenna operating over the SINCGARS / BOWMAN frequency band of 30-88 MHz.

The radiating element comprises a hard drawn alloy tube inserted into an aluminum base which contains foamed-in place matching circuits capable of handling up to 50 Watts power.

The method of construction provides protection from military environmental conditions including high vibration, shock and temperature variations.

Covers 30-88 MHz without tuning
Lightweight and Low Profile
Only 12” stand off height
For helicopter and fixed wing aircraft up to 250 Knots
Glass/Epoxy –Aluminum construction
Small footprint
Designed to MIL-STD-810 Environmental Conditions
50 Watts power handling

	21-20-36
Model #	21-20-36
Brand	Cooper Antennas

Frequency	30 - 88 MHz
Gain (typical)	-23 dBi @ 30 MHz rising to -8 dBi @ 88 MHz
VSWR	≤ 3:1
Impedance (nominal)	50 Ohms
Power	50 Watts
Polarization	Nominally Vertical
Radiation	Nominally omni directional in azimuth plane
Antenna RF Connector	BNC Female

Construction	Hard drawn aluminum alloy tube in aluminum base
Height	12 inches (305 mm)
Weight	0.44 lbs (200 g)
Base Plate Shape	Tear drop
Fixing Holes	4 x Ø 0.170 inches (4.3mm) ±0.005 inches (0.127mm) holes, counter sunk at 100° Ø 0.320 inches (8.1mm).