C-Band Dipole Airborne Antenna

4.0 to 5.0 GHz

SKU: 21-40-31

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C-Band Dipole Airborne Antenna

The 21-40-31 is a bicone dipole of rugged construction for airborne applications where ground plane independent operation is required.

Constructed within a glass-epoxy radome with lightweight aluminum alloy elements, this antenna provides a broad-beam +2 dBi gain elevation pattern ideally suited to data link applications on maneuverable air vehicles.

The antenna is attached to the aircraft with four 10:32 (or similar) countersunk screws and is completely sealed and foam filled for long term reliability and environmental protection. 

  • 4 to 5 GHz Bandwidth
  • Low height, rugged construction
  • Greater than 2 dBi gain
  • 100 Watts power handling
  • Designed to MIL-STD-810 environmental conditions
  • Suitable for use up to Mach 0.85
21-40-31
Model # 21-40-31
Brand Cooper Antennas
Frequency 4.0 to 5.0 GHz
Gain Typically ≥ 2 dBi 
VSWR 2:1 max
Impedance (nominal) 50 Ohms
Power 100 Watts CW 
Elevation Pattern As dipole, max gain at horizon ± 10º 
Azimuth Pattern  Omni-directional
Antenna RF Connector  TNC Female
Height 5 inches (130 mm) max 
Element Diameter 2 inches (45 mm) nominal
Weight 0.6 lbs (280g) max 
Mounting Holes 4 x 0.23 inches 100º csk on 2.44 inches PCD

Finish

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

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