135 - 175 MHz
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
|Frequency||135 - 175 MHz|
|Gain (typical)||≥ +1 dBi average over band|
|Impedance (nominal)||50 Ohms (nominal)|
|Polarization||Vertical (when vertically mounted)|
|Radiation||Nominally omni directional in azimuth plane|
|Antenna RF Connector||TNC Female|
|Height||10.5 inches (267 mm) max|
|Weight||0.23kg (0.5 lbs) max|
- Urethane Gloss White
- Other finish options are available.
- Please specify finish required when ordering.