Multi-Band VHF/UHF Antenna

Datasheet

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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