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High Gain Digitally Tuned VHF/UHF + UHF/FM+L-Band Antenna

30 - 512 & 760 - 1220 MHz

SKU: 21-150-21

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High Gain Digitally Tuned VHF/UHF + UHF/FM+L-Band Antenna

The 21-150-21 tuneable antenna provides exceptional gain in the 30 - 88 MHz SINCGARS band compared to similarly sized passive antennas, and maintains optimum performance up to 512 MHz. It also provides frequency coverage from 760 to 1220 MHz on a separate connector, independent of tuning to operate in the UHF/FM public services band (P25) and in L-Band for Tacan, IFF and Link 16 systems.

Many years of experience in designing solid-state tuned antennas has enabled our engineers to provide the ultimate in performance and reliability for a frequency agile airborne blade. Close attention to environmental, EMI and reliability design considerations combined with latest composites structural technology makes the 21-150-21 suitable for helicopters, subsonic and supersonic aircraft under demanding tactical conditions. The separate logic converter unit combines flash memory technology with MIL spec’d power supply in a MIL-STD-461 compliant package capable of tuning the antenna with radio silence under 50µ seconds. 

  • Frequency Hopping - fast tune
  • Only 9.5" height
  • Radio Silent Tuning Controlled by Separate Logic Converter Unit (LCU)
  • Compatible with Tacan, MIDS, IFF, Link16 and APC025 UHF as well as VHF/UHF LOS
  • LCU’s compatible with all versions of ARC210 including GEN5, ARC231, M3RA and TR6000
  • Design to MIL-STD-810 Environmental conditions
  • Suitable for helicopters and fixed wing aircraft
  • Lightning Protected 
Model # 21-150-21
Brand Cooper Antennas

30-174 MHz

225-512 MHz

760-870 MHz

960-1220 MHz 

Gain (typical) 

≥ -12.5 dBi (30 MHz)

≥ - 4 dBi (88 MHz)

≥ - 2 dBi (108 MHz)

≥ 0 dBi (174 MHz)

+ 1 dBi average (225-512 MHz)

+ 1 dBi average (760-870/960-1220 MHz)  


≤ 2.5:1 (VHF/UHF)

≤ 2.0:1 (L-Band) 

Impedance (nominal) 50 Ohms

25 Watts

100 Watts peak

Tuning Time  Less than 60μ seconds 
Polarization (nominal) Vertical (when vertically mounted) 
Antenna RF Connector

TNC Female (VHF/UHF)

N-type Female (UHF/FM and L-Band)

Antenna DC connector  Multi pin D38999
Height 9.5 inches max
Weight 4 lbs (1.81kg) 
Fixing Holes  10 x Ø 10:32 UNF holes or similar
Temperature -54ºC to +71ºC 


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

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