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Frequency Agile Digitally Tuned VHF/UHF/L-Band Antenna

30 - 600 & 960 - 1220 MHz

SKU: 21-150-175

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Frequency Agile Digitally Tuned VHF/UHF/L-Band Antenna

The 21-150-175 is the latest in a series of high gain, digitally tuned antennas providing outstanding performance in a similar shape, size and footprint as AS -3191 passive blades. Latest p-i-n diode tuning technology for VHF band combined with passive, susceptance corrected elements for UHF and LBand produces exceptional gain/height performance with excellent omnidirectivity throughout the frequency bands. A separate, lightweight logic converter unit (LCU) accepts data from the VHF/UHF radio, and using latest FPGA technology, provides tuning codes for the antenna. Tuning time, which is 100% radio silent, is typically less than 50µ second. 

  •  Radio silent tuning within less than 50µS
  • 42 Watts VHF, 50 Watts UHF continuous Power Handling
  • Latest FPGA logic converter unit technology
  • Rugged design has no forward facing or top loading protrusions for ground handling and in-flight safety
  • Designed for helicopters and subsonic fixed wing aircraft to MIL-STD-810 environmental conditions
  • EMI/EMC design to MIL-STD-461
  • -54° to +80°C operating (Antenna) -40° to +80° operating (LCU)
  • Footprint compatible with AS3191 
Model # 21-150-175
Brand Cooper Antennas

30-88 MHz

108-174 MHz

225-600 MHz

960-1220 MHz

Gain (typical)

≥ - 9 dBi (30 MHz)

≥ - 1 dBi (88 MHz)

≥ 0 dBi (118 MHz)

≥ 0 dBi (174 MHz)

≥ +2 dBi average (225-600 MHz)

≥ +2 dBi average (960-1220 MHz) 


≤ 2.5:1 VHF/UHF

≤ 2.0:1 L-Band 

Impedance (nominal)  50 Ohms

50 Watts UHF

42 Watts VHF continuous

20 Watts ave, 2 KW peak L-Band 

Polarization Vertical (when vertically mounted)
Tuning Time  Less than 50μ seconds 
Antenna RF Connector

TNC Female V/UHF

N-Type Female L-Band

DC connector D38999/49WB35PN
Height 14.7 inches max
Mounting Hole  6 x Ø 0.234 inch holes 
Weight (approx.)

Antenna 4 lbs

Logic Unit 1.7 lbs

Temperature -54ºC to +80ºC
Operating Speed  Up to Mach 0.95 


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

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