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Multi-Band VHF/UHF Antenna

121-960 MHz

SKU: 21-30-73

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Multi-Band VHF/UHF Antenna

The 21-30-73 is a very low height receive only antenna covering VHF and UHF distress frequencies, VHF/FM maritime band and 890-960 MHz GSM frequencies. Design comprises a top loaded monopole with specially shaped radiating element to preserve patterns though the frequency range.

Constructed using a glass loaded, thermoplastic shell moulding with internally foamed-in-place radiating and matching elements, this antenna is completely sealed to provide long term reliability and protection against moisture ingress. An aluminum alloy baseplate carries a centrally mounted N-type (female) connector and the six hole mounting pattern is a drop-on replacement for AT256 type UHF blades.

  • Very low height and light weight
  • Covers VHF and UHF distress frequencies, VHF maritime and GSM frequencies
  • Receive only
  • Omni-directional azimuthal radiation pattern
  • Designed to MIL-STD-810 environmental requirements 
21-30-73
Model # 21-30-73
Brand Cooper Antennas
Frequency

121-406 MHz

890-960 MHz 

Gain (typical)

≥ -7 dBi 121.5 MHz

≥ -8dBi 160 MHz

≥ +4 dBi 406 MHz ≥ +2 dBi 890-960 MHz 

VSWR

≤ 4.5:1 121-400 MHz

≤ 1.5:1 406 MHz

≤ 2.0:1 890-960 MHz

Impedance (nominal) 50 Ohms
Polarization Vertical
Radiation Omni-directional in azimuth Elevation - see graphs
Antenna RF Connector  N Female
Height 150mm max 
Weight 400 grms max 
Fixing Holes 6 x Ø 0.5.16 mm

Finish

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

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