VHF/FM Antenna

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VHF/FM Antenna

The 21-20-165 is a unique, wide band VHF antenna comprising a light gauge aluminum tube moulded into an insulator containing proprietary matching circuits producing an operating frequency of 135-175 MHz. This design is installed with a single hole skin cut out and secured from the inside with a 5/8 UNF nut. The antenna is DC Grounded for lightning (LITS) and p-static protection.

The antenna is filled with closed cell foam and fully sealed for very light weight and long term reliability. It is intended for helicopters and fixed wing aircraft operating up to 250 knots.

Extremely light weight
Wide VHF Bandwidth
Single hole fixing
Covers full VHF/FM maritime and Sonobuoy band
Environmental Design to DO160E including lightning indirect effects (LITS)
Fully sealed and foam filled
Only 10.5" height
DC Grounded

	21-20-165
Model #	21-20-165
Brand	Cooper Antennas

Frequency	135 - 175 MHz
Gain (typical)	≥ +1 dBi average over band
VSWR	≤ 2.5:1
Impedance (nominal)	50 Ohms (nominal)
Power	45 Watts
Polarization	Vertical (when vertically mounted)
Radiation	Nominally omni directional in azimuth plane
Antenna RF Connector	TNC Female