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Multi-band FM Communications Antenna

136 to 174 MHz & 380 to 870 MHz

SKU: 21-50-296

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Multi-band FM Communications Antenna

The 21-50-296 is a low height, multi-band, vertically polarized communications antenna particularly suited to latest generation VHF/UHF FM/data link radios and public service radios on helicopters with minimal ground clearance.

Designed as a short, top loaded monopole, excellent performance is achieved throughout the frequency range by use of frequency selective matching and decoupling circuits. Mechanical construction uses a glass reinforced thermoplastic shell with foamed-in-place internal elements. A single TNC female connector is fitted to the aluminium base plate and the antenna is DC grounded for p-static protection. 

  • Rugged, low height with top loading plate for VHF enhanced gain.
  • Wide bandwidth covers all commercial VHF and UHF FM frequencies.
  • Small size only 6 inches height.
  • Can be used with external diplexer/ triplexer for simultaneous multiband operation.
  • Passive design does not require external tuning.  
21-50-296
Model # 21-50-296
Brand Cooper Antennas
Frequency

136-174 MHz

380-870 MHz

Gain

VHF ≥ +1 dBi average

UHF ≥ +2 dBi average

VSWR

VHF ≤ 3:1

UHF ≤ 2.5:1

Impedance (nominal) 50 Ohms
Power 25 Watts max 
Polarization Vertical
Radiation Pattern Nominally Omni-directional in azimuth, elevation see graphs
Antenna RF Connector TNC Female
Overall Height 6 inches max (152 mm) 
Weight 3.0 lbs (1.36 kg)
Fixing Holes 6 x Ø 0.2086 inches 

Finish

  • Antenna - Urethane lusterless Black
  • Other finish options are available.
  • Please specify finish required when ordering.
Datasheet:

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