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Multi-Band Satcom & Communications Antenna

240 to 400 MHz & 30 to 512 MHz

SKU: 21-50-70

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Multi-Band Satcom & Communications Antenna

The 21-50-70 is a rugged multifunction VHF/UHF, AM-FM, (LOS) and Satcom (BLOS) antenna designed for airborne, applications.

A high strength aerodynamic vertical shell houses a 30 - 512 MHz linear element that can be used for V/UHF line of sight “LOS” communications or UHF Satcom “BLOS” at low angles of elevation. This vertical shell also supports a “Frisbee” shape horizontal element containing a pair of cross dipoles, connected to provide high angle, right hand circularly polarized UHF Satcom coverage.

The antenna is capable of operating in temperatures of -40ºC to 120ºC. 

  • Low Height
  • High Strength
  • Fully environmentally sealed
  • Hi and Lo angle UHF Satcom coverage
  • Full 30 - 512 MHz LOS communications
  • PRC-117G, AN/ARC-210 & AN/ARC-231 compatible
  • Footprint fixings compatible with 437S1-H
Model # 21-50-70
Brand Cooper Antennas

Hi Angle (BLOS): 

Lo Angle (LOS):

240 - 400 MHz

 30 - 512 MHz


Hi Angle (BLOS)

+6 dBiC @ zenith 
Lo Angle (LOS)

-26 dBi @ 30 MHz

-12 dBi @ 88 MHz

-8 dBi average 118 -174 MHz

+1 dBi average 225 - 400 MHz

0 dBi average 400 - 512 MHz 


Hi Angle 

Lo Angle

≤ 2.0:1 

≤ 2.5:1 

Impedance (nominal)  50 Ohms for both ports 
Power Hi Angle (BLOS): 100 Watts CW 
Lo Angle (LOS):

50 Watts (30-88 MHz),

50 Watts (118-175 MHz),

100 Watts (225-512 MHz)


Hi Angle (BLOS): 

Lo Angle (LOS):

Right Hand Circular

Vertical, Linear 

Antenna RF Connector 

Hi Angle (BLOS): 

Lo Angle (LOS)

N Female

TNC Female

Height 8.2 inches (208.3 mm) max
Disc diameter 15.9 inches (404 mm) max
Weight 8.16 lbs (3.7kg) max 
Mounting Hole Configuration  8 holes each 0.208 - 0.234 dia. Inches (5.28 - 5.94mm) 
Designed to Environmental 

MIL-E-5400 Class 2



  • Antenna - Urethane Lusterless Grey FED-STD 595 36173
  • Baseplate - Unpainted, Alocrom 
  • Other finish options are available.
  • Please specify finish required when ordering.

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