VHF communications Antenna

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The 21-20-24 is a lightweight , single hole fixing VHF “whip” antenna suitable for helicopters or aircraft operation up to 350 knots.

The antenna radiating element is encapsulated within a strong glass-epoxy tube which in turn is integrated into an aluminum alloy base containing a TNC connector and loss-less matching cavity. Installation requires insertion into a 17.5mm (11/16in) hole in the airframe and securing with the angled washes and nuts provided.

Very light weight
Full VHF/ATC band operation
Single hole fixing
Can be mounted Vertically or inclined at 30º
Suitable for up to 350 knots
TNC female connector (BNC available as option)

	21-20-24
Model #	21-20-24
Brand	Cooper Antennas

Frequency	118 - 152 MHz
Gain (typical)	≥ +2.5 dBi
VSWR	≤ 2.5:1
Power	50 Watts CW
Polarization	Vertical (when vertically mounted)
Radiation	Omni-directional in azimuth within 0.25 dB when vertically mounted
Connector	TNC Female (optional BNC as 21-20-24-1)