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Combined Sonobuoy AIS & UHF Communication Band Blade Antenna

136 to 175 MHz + 225 to 400 MHz

SKU: 21-50-05-3

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Combined Sonobuoy AIS & UHF Communication Band Blade Antenna

The 21-50-05-3 is a combined VHF/UHF blade antenna intended for the multiple roles of sonobuoy reception, AIS, sonobuoy command and PLS.

An N-type V/UHF connector is fitted to the aluminum base plate which supports a high strength glass-epoxy radome containing a 3-D wide band radiating element of high efficiency.

A separate external diplexer (part no 21-80-31) is available when it is required to split the VHF and UHF outputs.

Frequency of operation covers full VHF Sonobuoy receive and UHF communications band. The antenna can handle up to 60 Watts of UHF power.

21-50-05-3
Model # 21-50-05-3
Brand Cooper Antennas
Frequency

136 MHz to 175 MHz VHF

225 MHz to 400 MHz UHF

Gain (typical)

VHF 1 dBi average, 0 dBi min

UHF +3 dBi (typical mid band) +2 dBi average over band 

VSWR

≤ 2.5:1 VHF

≤ 2.5:1 UHF

≤ 2:1 291-292 MHz 

Impedance (nominal) 50 Ohms
Power 60 Watts 
Polarization Vertical (when mounted vertically)
Radiation Pattern Omni directional in azimuth plane, elevation as plots.
Antenna RF Connector N Female VHF/UHF 
Antenna Shell Type  Glass loaded epoxy blade on aluminum alloy base 
Height 9 inches (228mm) 
Weight 4 lbs max (1.8kg) 
Fixing Holes  8 holes 0.2 inches dia. nominal 

Finish

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

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