View PDF brochure for Multi-function UHF LOS/Satcom L-Band and GPS AntennaDatasheet

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

Contact us for latest price
Sold Out - Backorder Available

Calculate Shipping

Freight quote - $0.00
As the size and weight is not normally known we use several freight carriers to ensure you get the best price. Complete your order or quote and we will get back to you with the available freight options.

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
Model # 21-50-73
Brand Cooper Antennas

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


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

UHF : 200 Watts CW

L-Band : 2 KW Peak, 200 Watts CW

GPS: 1 Watt 


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


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


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

More From This Category

Airborn Stub Antenna

Airborn Stub Antenna

SKU: 21-50-30

Airborne AIS Blade Antenna

Airborne AIS Blade Antenna

SKU: 21-20-60

Airborne Blade Antenna

Airborne Blade Antenna

SKU: 21-30-55

Airborne Blade Antenna

Airborne Blade Antenna

SKU: 21-30-176

Airborne IFF Interrogator Antenna

Airborne IFF Interrogator Antenna

SKU: 21-40-66

Airborne Stub Antenna

Airborne Stub Antenna

SKU: 21-20-12

Aircraft Static Discharger

Aircraft Static Discharger

SKU: 21-90-02