UHF Satcom Antenna

225 to 400 MHz

SKU: 21-30-70

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UHF Satcom Antenna

The 21-30-70 is a low profile UHF Satcom antenna that provides hemispherical coverage without the need to switch from high to low angle elements. The design comprises a pair of specially shaped crossed folded dipoles connected such as to generate Right Hand Circular polarization.

Typical radiation diagrams are shown overleaf. If enhanced near-horizon coverage is required, the antenna can be used in conjunction with a linearly polarized monopole antenna such as the CAL 21-30-18. Radome construction is from high strength epoxy-fiberglass and the antenna is sealed and foamed for long term protection against moisture ingress.  

  • Intended for airborne applications up to Mach 0.85.
  • Hemispherical Coverage.
  • Low profile.
  • Rugged yet lightweight
  • Designed to MIL-STD-810 Environmental conditions.
  • Element DC grounded for P-static protection
21-30-70
Model # 21-30-70
Brand Cooper Antennas
Frequency 225 - 400 MHz 
Gain 2 - 4 dBiC 
VSWR ≤ 1.5:1
Impedance (nominal) 50 Ohms
Power 200 Watts CW
Polarization Right Hand Circular 
Antenna RF Connector  TNC Female
Height 6.25 inches (159mm) 
Weight 13 lbs (5.89kg) max 
Diameter 23.1 inches (587mm) 
Fixing Holes 12 holes 0.312 diameter

Finish

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

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