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VHF/UHF Whip Antenna

30 to 512 MHz

SKU: 21-50-12

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VHF/UHF Whip Antenna

The 21-50-12 antenna is a high performance, conical whip antenna designed for helicopters and covering the frequency band 30-512 MHz.

The 21-50-12 antenna employs a full length vertical element primarily for use at VHF together with a parasitically excited sleeve monopole designed for operation over the UHF band. Decoupling techniques are incorporated to avoid unwanted interaction and preserve performance throughout all operating bands. A frequency dependent matching network is incorporated to ensure acceptable VSWR with minimum loss of gain throughout the frequency band. 

  • Covers all operating portions of 30-512 MHz JTRS frequency band
  • Efficient decoupling circuits maintain radiation pattern throughout frequency band
  • Rugged construction for helicopter applications subject to high vibration levels
  • No tuning required  55 inches overall height
  • Meets MIL-STD-810 environment
  • 50 Watts power handling
  • Excellent gain maintained by passive impedance matching throughout frequency band
21-50-12
Model # 21-50-12
Brand Cooper Antennas
Frequency 30 - 512 MHz 
Gain

30 - 88 MHz -12 dBi to -6 dBi

108 - 174 MHz -4 dBi average

225 - 512 MHz +2 dBi average

VSWR

30 - 88MHz ≤ 2.5:1

108 - 174MHz ≤ 2.5:1

225 - 450MHz ≤ 2.25:1

451 - 512MHz ≤ 3.0:1 

Impedance (nominal) 50 Ohms
Power 50 Watts CW 
Polarization Vertical
Antenna RF Connector TNC Female
Operational Temperature  -40°C to +71°C
Overall Height 2.36 Inches (59.9mm)
Weight 0.363lbs (0.165kg) max
Fixing Plate  5.3 inches (134.6mm) by 1.8 inches (45.7mm) 
Fixing Holes 6 x Ø 0.25 inches (6.35mm) equi-spaced on a 5 inches (127.0mm) P.C.D. 

Finish

  • Urethane Lusterless Black Standard
  • Other finish options are available.
  • Please specify finish required when ordering.
Datasheet:

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