Fast Tune VHF/UHF Antenna

30 - 512 MHz

SKU: 21-140-200

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Fast Tune VHF/UHF Antenna

The 21-140-200 is the latest in a series of high gain, digitally tuned VHF/UHF antennas providing outstanding VHF and UHF performance in a 14.7 inch tall structure. This antenna has the additional benefit of having the same footprint size and fixings as AS3191. Latest p-i-n diode tuning technology for VHF band combined with a passive susceptance corrected element for the UHF band provides capability for use with both multiband VHF/UHF radios and when used with external diplexer type 21-80-25, UHF EPLRS radios working in the 420 - 450 MHz frequency range. 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 60µ second. 

  • Radio silent tuning within typically 60µS
  • 14.7 inches height gives exceptional SINCGARS Gain
  • Latest FPGA logic converter unit technology
  • Can accept both VHF/UHF and EPLRS radio inputs (via diplexer)
  • Rugged design has no forward facing projections 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 +75°C operating (Antenna) -40° to +75° operating (LCU)
  • Footprint compatible with AS3191 
21-140-200
Model # 21-140-200
Brand Cooper Antennas
Frequency

30-88 MHz

108-174 MHz

225-512 MHz 

Gain (typical) 

≥ - 6.5 dBi (30 MHz)

≥ - 3 dBi (88 MHz)

0 dBi average (118-174 MHz)

+ 2 dBi average (225-512 MHz) 

VSWR 2.5:1 
Impedance (nominal) 50 Ohms
Power

50 Watts UHF

30 Watts VHF

Tuning Time  Less than 60µ seconds
Polarization Vertical (when vertically mounted) 
Antenna RF Connector  TNC Female 
DC Connector Multi pin PTO 12-10P to MIL-C-26482 
Height 14.7 inches (373mm) 
Weight

Antenna 4.6 lbs (2.09kg)

Logic Unit 1.65 lbs (0.75kg) 

Fixing Holes  6 x Ø 0.208 inch holes for 10:32 UNF holes or similar 
ENVIRONMENTAL
Temperature

-54° to +80° C (Operating) Antenna

-54° to +80° C (Non operating) LCU

-40° to +80° C (Operating) LCU 

Operating Speed Up to Mach 0.85 

Finish

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

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