Multi-Band Satcom & Communications Antenna
225 to 400 MHz & 30 to 512 MHz
The 21-50-29 is a combined Hi-Lo angle UHF Satcom Antenna plus VHF/UHF Line -of-Sight, “LOS” antenna designed for installation on military helicopters, vehicles, shelters or housings via a 4 hole mounting plate.
The antenna comprises two co-located elements; a circularly polarized cross-dipole and a linearly polarized broadband monopole. The two elements have separate RF feeds and by manual selection of either, full hemispheric pattern coverage is provided for UHF Satcom and omnidirectional azimuthal coverage for LOS. The low angle satcom is intended for elevation angles up to about 45° and the high angle for approximately 45° to zenith.
Mast construction is from rugged aluminium and fiberglass, foam-filled for structural integrity and prevention of moisture ingress with aluminium alloy dipole elements and base housing.
- Suitable for helicopter, vehicular, shipborne and shelter installations
- Robust Construction
- Hemispherical radiation pattern coverage with separate Hi and Lo angle elements
- All Weather operation
- 200 Watts CW Power handling
- Designed to MIL-STD-810 environmental requirements
- 4 hole mounting plate
Low Angle : 30 - 512 MHz
High Angle : 225 - 400 MHz
≥ -23 dBi @ 30 MHz
≥ -7 dBi @ 88 MHz
≥ -2.5 dBi a@ 118 - 174 MHz
≥ 0 dBi to +3 dBi @ 225 - 512 MHz
|High Angle:||+6.5 dBiC a@ 318 MHz|
≤ 2.75:1 30 - 450 MHz,
≤ 3.0:1 450 - 512 MHz
|High Angle:||≤ 1.75:1|
|Impedance (nominal)||50 Ohms|
|Power||Low Angle : 75 Watts VHF, 200 Watts UHF High Angle : 200 Watts|
|Polarization||Low Angle: Linear High Angle: Right Hand Circular (maximum at zenith)|
|Antenna RF Connector||Low Angle: TNC Female High Angle: N Female|
|Operational Temperature||-54°C to +71°C|
|Overall Height||12 inches (305mm)|
|Dipole span||20 inches (508mm)|
|Weight||0.363lbs (0.165kg) max|
- Urethane Lusterless Black Standard
- Other finish options are available.
- Please specify finish required when ordering.