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VHF/FM Airborne Antenna

135 to 175 MHz

SKU: 21-20-3803

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VHF/FM Airborne Antenna

The 21-20-38/03 is an externally mounted airborne VHF/FM antenna operating over the VHF/FM and Sonobuoy bands of 135-175 MHz.

A fiberglass rod with an internal bent stainless steel 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 world-wide military environmental conditions including high vibration, shock and temperature variations. 

  • Covers high VHF/FM and Sonobuoy Bands
  • Lightweight and Low Profile
  • Only 9.5” stand off height
  • For helicopter and fixed wing aircraft up to 250 Knots
  • Glass/Epoxy –Aluminum construction
  • Small footprint
  • Designed to MIL-STD-810 Environmental Conditions 
21-20-3803
Model # 21-20-38/03
Brand Cooper Antennas
Frequency 135 - 175 MHz
Gain (typical)  0 dBi 
VSWR ≤ 2.75:1 
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 encased stainless steel whip Aluminum base 
Height 9.5 inches (241 mm) 
Weight 0.6 lbs (0.27 kg) 
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).

Finish

  • Urethane Gloss White
  • Other finish options are available.
  • Please specify finish required when ordering.
Datasheet:

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