UHF Airborne Tetra Antenna

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The 21-30-68 is an externally mounted airborne stub antenna operating over the TETRA frequency band of 380-430 MHZ.

A fiberglass rod with an internal element is fitted 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 severe environmental conditions including high vibration, shock and temperature variations.

Covers Tetra Frequency Band

Suitable up to 350 Knots

Fully Environmentally Sealed

Meets AS-3191 Lightning Strike Criteria

Less than 8 inches height  TNC Connector

	21-30-68
Model #	21-30-68
Brand	Cooper Antennas

Frequency	380 to 430 MHz
Gain	≥ + 2.5 dBi average
VSWR	≤ 2.0:1
Impedance (nominal)	50 Ohms
Power	50 Watts
Polarization	Linear (vertical when vertically mounted)
Radiation	Nominally omni directional in azimuth plane
Antenna RF Connector	TNC Female

Construction	Fibreglass whip/ Aluminum base
Height	7.9 inches (200 mm)
Weight	0.35 lb (0.16kg)
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 0.280 inches (7.1mm).