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UHF/MUOS Satcom & VHF/UHF LOS Antenna

240 to 385 and 30 to 512 MHz

SKU: 21-50-48

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UHF/MUOS Satcom & VHF/UHF LOS Antenna

Combining highly efficient “droopy dipoles” with a wide band, line-of-sight linear element, the 21-50-48 provides Hi-Lo angle UHF Satcom from a single connector plus a separate VHF/UHF/EPLRS element in a single airborne antenna.

Element shaping and matching of the circularly polarized dipoles provides UHF Satcom coverage right through the UHF and MUOS band with useable radiation and gain typically from zenith down to 20 degrees or less above the horizon.

The robust design is suitable for helicopter and fixed wing aircraft operating up to 450 knots.

  • Finish F81 is NSN 5985-01-623-7126
  • Suitable for helicopter, vehicular, fixed and mobile applications
  • Covers UHF Satcom and MUOS as well as VHF/UHF Line of Sight (LOS)
  • All Weather operation
  • Wide Angle pattern coverage without Hi-Lo switching
  • 200 Watts CW Power handling for Satcom
  • Designed to MIL-STD-810
Model # 21-50-48
Brand Cooper Antennas

Line of Sight (LOS) : 30 - 512 MHz

Satcom : 240- 385 MHz

Gain (typical)  LOS

≥ -23 dBi @ 30 MHz

≥ -10 dBi @ 88 MHz

≥ -3 dBi (average) 118 - 174 MHz

≥ 0 dBi to +3 dBi 225 - 512 MHz 


+6.5 dBiC @ Zenith

≥ 0 dBiC @ all elevation angles above +25°


LOS: 30-449 MHz ≤ 2.5:1; 450-512 MHz ≤ 3:1

Satcom: ≤ 1.75:1 

Impedance (nominal) 50 Ohms

LOS : 50 Watts VHF, 200 Watts

UHF Satcom : 200 Watts


LOS: Linear

Satcom: Right Hand Circular (maximum at zenith)

Antenna RF Connector

LOS: TNC Female

Satcom: N Female

Operational Temperature -54°C to +71°C 
Overall Height 12 inches (305mm) 
Weight 12 inches (305mm) 


  • Urethane Lusterless Gray FED-STD 595 36173
  • Other finish options are available.
  • Please specify finish required when ordering.

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