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Multi Function VHF/UHF & L-Band Antenna

30 - 512 Mhz 1600-2000 MHz

SKU: 21-50-105

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Multi Function VHF/UHF & L-Band Antenna

The 21-50-105 is a high strength, passive, multi function blade antenna designed for aircraft operating up to Mach 0.85.

VHF/UHF performance is comparable to AS3191 antennas but is only 12" in height compared to 14.7" and the antenna includes a highly efficient 1600 - 2000 MHz element for data link.

The antenna has two connectors positioned to allow for drop-on replacement for Collins 437S-1H and Chelton 12-437 tunable blades.

Unique internal element design ensures excellent elevation patterns right through to L-band and the antenna is a fully sealed unit for reliable operation in world-wide conditions of service. 

  • Covers JTRS Comms and Data Link Frequencies.
  • Drop-on replacement for 437S-1H and 12-437 Tunable Antenna.
  • Passive design - requires no external tuning.
  • High strength glass-epoxy radome
  • Exceptional UHF and L-band gain
  • VHF gain similar to AS3191
  • High power - 75 Watts, VHF 100 Watts, UHF 200 Watts L-band
  • Designed to MIL-STD-810 environmental 
Model # 21-50-105
Brand Cooper Antennas

30-512 MHz

1600-2000 MHz


-23dBi @ 30MHz

-12dBi @ 88MHz

-2dBi @ 150MHz

+2.5dBi average 200-512Mhz

+2dBi average 1600-2000MHz 


≤ 3.0:1 max (VHF)

≤ 2.5:1 max (UHF)

≤ 1.75:1 max (L-band) 

Impedance (nominal) 50 Ohms

575 Watts (VHF)

100 Watts (UHF)

200 Watts (L-band) 



Antenna RF Connector

TNC Female (V/UHF)

N Female (L-band) 

Overall Height  12 inches
Fixings 8 holes 0.205 diameter 
Weight 5.5 lbs max 
Temperature -56°C to +80°C  
  Environmental specifications generally in accordance with MIL-STD-810.


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



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