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Multi-function UHF LOS/Satcom & GPS Antenna

225 to 450 MHz and 1564 to 1587 / 1216 to 1239 MHz

SKU: 21-50-79

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Multi-function UHF LOS/Satcom & GPS Antenna

The 21-50-79 is a rugged multifunction UHF, LOS, UHF Satcom and GPS antenna designed for airborne applications. A high strength aerodynamic vertical shell houses a 225 - 450 MHz linear element that can be used for UHF line of sight “LOS” communications or UHF Satcom at low angles of elevation. This vertical shell also supports a circular horizontal disc containing a pair of cross dipoles connected to provide high angle, right hand circularly polarized UHF Satcom coverage and an L1/L2 passive GPS antenna.

  • Hi and Lo angle UHF Satcom coverage
  • Covers L1 and L2 GPS Frequencies
  • EPLRS compatible
  • Low height, just 9"
  • Fixing holes compatible with 437S1-H
  • Designed to MIL-STD-810 Environmental Requirements 
21-50-79
Model # 21-50-79
Brand Cooper Antennas
Frequency

UHF Hi Angle 

UHF Lo Angle 

GPS

240 - 400 MHz

225 - 450 MHz

1564 - 1587 / 1216 - 1239 MHz

Gain (Typical) 

Hi Angle

Lo Angle 

GPS

+5 dBiC at Zenith

+2.0 dBi average @ 225 - 450 MHz

+4 dBiC @ Zenith  

VSWR

Hi Angle 

Lo Angle

≤ 2.0:1 

≤ 2.5:1 

Impedance (nominal)  50 Ohms for both ports 
UHF Power 200 Watts CW 
Polarization

UHF Hi Angle  

UHF Lo Angle

GPS

Right Hand Circular

Vertical

Right Hand Circular 

Isolation 

Between Low and High Angle : ≥ 15 dB (mid band)

Between Low Angle and GPS : ≥ 30 dB

Between High Angle and GPS : ≥ 30 dB 

Antenna RF Connector 

UHF Hi Angle

UHF Lo Angle

GPS

N Female

TNC Female

TNC Male 

Height 9 inches (228mm) max
Disc diameter 15.9 inches (404mm) max 
Weight 9 lbs (4.09Kg) max
Mounting Hole Configuration  8 holes each 0.208 - 0.234 dia. Inches (5.28 - 5.94mm) 
ENVIRONMENTAL
Designed to Environmental 

MIL-E-5400 Class 2

MIL-STD-810

Finish

  • Antenna - Gloss White
  • Baseplate - Unpainted, Alocrom 
  • Other finish options are available.
  • Please specify finish required when ordering.
Datasheet:

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