VHF FM/AM Airborne “ WHIP “ Antenna

30 to 156 MHz

SKU: 21-20-47

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VHF FM/AM Airborne

The 21-20-47 is a high performance VHF FM/AM communication “whip” antenna designed for use with wide band military radios covering the frequency band 30-156 MHz. The mechanical design utilizes a woven fiber glass/epoxy whip with a multicored internal element such as to maximize efficiency within a high strength/weight ratio structure.

A unique passive matching circuit provides frequency selective loading to minimize losses whilst ensuring correct impedance throughout the band. The whip element is detachable and can be used as an efficient replacement for AS-1703. 

  • High strength, detachable whip element
  • 50 Watt capability
  • Efficient passive matching circuits
  • Requires no tuning
  • Environmental Design to MIL-STD-810
  • Suitable for 250 knots airspeed
  • Meets requirements of NSN 5985-01-453-4784
  • 0 dBi typical average gain through band 
21-20-47
Model # 21-20-47
Brand Cooper Antennas
Frequency 30 to 156 MHz
Gain (typical)  0 dBi 
VSWR ≤ 3.0:1 
Impedance (nominal) 50 Ohms
Power 50 Watts
Polarization Linear (vertical when vertically mounted)
Radiation Nominally omni directional in azimuth plane
Antenna RF Connector  BNC Female
Construction Fiberglass whip/Aluminum base 
Height 58 inches (1473mm) 
Weight 1.5 lb (0.7kg)
Base Plate Shape Tear drop
Fixing Holes 4 x Ø 0.206 inches (5.2mm) holes

Finish

  • Urethane Olive Drab paint
  • Other finish options are available.
  • Please specify finish required when ordering.
Datasheet:

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