Frequency Agile Digitally Tuned VHF Antenna

30 - 108 MHz

SKU: 21-120-01

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Frequency Agile Digitally Tuned VHF Antenna

This tuneable antenna provides exceptional gain in the 30-108 MHz SINCGARS and VHF band compared to similarly sized passive antennas. Many years of experience in designing solid-state tuned antennas has enabled CAL’s team to provide the ultimate in performance and reliability for a frequency agile airborne blade. Close attention to environmental and EMI design considerations combined with latest composites structural technology makes the 21- 120-01 suitable for helicopters and subsonic aircraft. Providing high reliability in harsh military environments, the 21-120-01 utilizes a strong, one-piece, glass-epoxy blade moulding surmounted by a rugged, aft-facing top loading plate that enhances gain throughout the VHF/ FM frequency band. The antenna is fitted to the airframe via an aluminum alloy baseplate which is intimately bonded into the blade structure and which also carries the RF and LCU interface connectors. The separate logic converter unit combines flash memory technology with MIL spec’d power supply in a MIL-STD-461 compliant package. LCU’s can be provided for most current generation digital transceivers. 

  • High Gain
  • Frequency Hopping - fast tune
  • Just 12" height  Tuning Controlled by separate Logic Converter Unit (LCU)
  • LCU’s compatible with latest generation digital radios
  • Designed to MIL-STD-810 Environmental conditions
  • Suitable for helicopter and subsonic aircraft
  • Footprint drilling compatible with AS-3191 and 37R-2U 
21-120-01
Model # 21-120-01
Brand Cooper Antennas
Frequency

30-108 MHz

Gain (typical) 

≥ - 8 dBi (30 MHz)

≥ - 2 dBi (88 MHz)

≥ 0 dBi (108 MHz)

VSWR 2.5:1 
Impedance (nominal) 50 Ohms
Power 25 Watts CW
Tuning Time  Less than 60µ seconds
Polarization Vertical (when vertically mounted) 
Antenna RF Connector  TNC Female 
DC Connector PTO2 12-10P 
Height 12 inches max 
Weight

Antenna 4.5 lbs (2.05kg)

Logic Unit 2.2 lbs (0.99kg) 

Fixing Holes  6 x Ø 10:32 UNF holes or similar
ENVIRONMENTAL
Temperature -54ºC to +80ºC 
Operating Speed Up to Mach 0.95

Finish

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

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