VHF Communications Antenna

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The 21-20-54 is a very lightweight, simple to install VHF ‘whip’ antenna suitable for aircraft operating up to 350 knots. Full VHF ATC frequency coverage is achieved by matching circuits encapsulated in the antenna base. The antenna maintains a low VSWR when mounted either vertically or raked at an angle of 30º using the spacers provided.

Construction comprises a Beryllium Copper element encapsulated in a high strength tapered glass-epoxy tube which is bonded into an aluminum alloy base housing carrying a TNC (or BNC as 21-20-54-1) female connector.

Covers full VHF ATC band
Single hole fixing
Lightweight
Can be installed vertical or raked 30º
High strength glass-epoxy whip element
Environmental conditions to MIL-STD-810

	21-20-54
Model #	21-20-54
Brand	Cooper Antennas

Frequency	118-152 MHz
Gain (typical)	≥ + 2 dBi
VSWR	≤ 2.5:1
Impedance (nominal)	50 Ohms
Power	25 Watts CW
Pattern	Omnidirectional in azimuth Similar to stub in elevation
Radiation	Nominally omni directional in azimuth plane
Antenna RF Connector	TNC Female