Fast Tune VHF/UHF Antenna

30 - 600 MHz

SKU: 21-140-136

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Fast Tune VHF/UHF Antenna

The 21-140-136 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 exceptional gain over a very wide band. 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 50µ second (see separate datasheet). 

  • Radio silent tuning within typically 50µS via separate Logic Converter Unit
  • 14.7 inches height gives exceptional SINCGARS Gain
  • 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
  • Continuous coverage 30-174 MHz
  • Footprint and fixing compatible with AS3191
21-140-136
Model # 21-140-136
Brand Cooper Antennas
Frequency

30-174 MHz continuous

225-600 MHz

Gain (typical) 

≥ - 7.5 dBi (30 MHz)

≥ - 1 dBi (88 MHz)

0 dBi average (118-174 MHz)

+ 2 dBi average (225-600 MHz)

VSWR ≤ 2.5:1 (≤ 3.5:1 88-117.95 MHz)
Impedance (nominal) 50 Ohms
Power

50 Watts UHF

30 Watts VHF (35 Watts with duty cycle)

Tuning Time  Less than 50µ seconds
Polarization Vertical (when vertically mounted) 
Antenna RF Connector  TNC Female 
DC Connector D38999/49WB35PN 
Height 14.7 inches (374mm) max 
Weight

4 lbs (1.8kg)

Fixing Holes  6 x Ø 0.208 inch holes for 10:32 UNF holes or similar
ENVIRONMENTAL
Temperature -54° to +80° C (Operating) 
Operating Speed Up to Mach 0.85 

Finish

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

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