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Multi-function UHF LOS/Satcom L-Band and GPS Antenna

225-450 MHz 240-400 MHz 960-220 MHz 1564-1587/1216-39MHz

SKU: 21-50-73

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Multi-function UHF LOS/Satcom L-Band and GPS Antenna

The 21-50-73 is a rugged multifunction UHF LOS, UHF Satcom, L-Band and GPS antenna designed for airborne applications. A high strength aerodynamic vertical shell houses a 225 to 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 “Bat-Wing” shape horizontal element containing a pair of cross dipoles, connected to provide high angle, right hand circularly polarized UHF Satcom coverage and an L1/L2 active GPS antenna.

A high power grounded L-Band element is integrated into the antenna base. The antenna is completely sealed and filled with closed cell foam for long term environmental protection and reliability. 

  • Hi angle UHF Satcom & MUOS coverage
  • Lo Angle UHF LOS communications
  • Covers L1 and L2 GPS Frequencies
  • EPLRS compatible
  • Suitable for TACAN/IFF/LINK 16
  • Low wingspan minimizes loading on aircraft structure
  • Fixing holes compatible with 437S1-H
  • Designed to MIL-STD-810 Environmental Requirements
  • Erosion protection over all leading edge surfaces
21-50-73
Model # 21-50-73
Brand Cooper Antennas
Frequency

UHF Hi Angle : 240 - 400 MHz

UHF Lo Angle : 225 - 450 MHz

L-Band : 960 to 1220 MHz

GPS: 1564 - 1587 / 1216 - 1239 MHz

Gain (typical)

Hi Angle : +6.5 dBiC

Lo Angle : +2.0 dBi average @ 225 - 450 MHz

GPS: +3.0 dBiC @ Zenith + 30 dB amplifier

VSWR

Hi Angle : ≤ 2.0:1

Lo Angle : ≤ 2.5:1 225-400 MHz

L-Band : ≤ 2.0:1

GPS : ≤ 2.0:1

Impedance (nominal) 50 Ohms for all ports
Power

UHF : 200 Watts CW

L-Band : 2 KW Peak, 200 Watts CW

GPS: 1 Watt 

Polarization

UHF Hi Angle : Right Hand Circular

UHF Lo Angle and L-Band : Vertical

GPS : Right Hand Circular 

Antenna RF Connector

UHF Hi Angle : N Female

UHF Lo Angle : TNC Female

L-Band : N Female

GPS: TNC Female 

Height 12 inches (305mm) max 
Wingspan 13 inches (330mm) max 
Weight 9.7lbs (4.4Kg) 

Mounting Hole

Configuration

8 holes each 0.208 - 0.234 dia. Inches (5.28 - 5.94mm) 

Finish

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

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