RFS RADIO FREQUENCY SYSTEMS ST SERIES

GENERAL DESCRIPTION


SLOPING TRIANGLE ANTENNAS - ST SERIES

photo RFS Radio Frequency Systems ST Series These simple low cost broadband horizontally polarized antennas are designed for medium to long range transmission or receiving applications.

Characterised by an increase in gain and directivity when operated within the higher frequency band, the ST series provides an economical option to a full horizontal Log Periodic Dipole design.

The antenna comprises two sloping wires resistively terminated at the centre point of the vee near ground level. The apex of the vee is supported by a suitable mast whilst the antenna is fed via a balun transformer at the mast head.

The ST series is available with or without mast systems of which two versions are available:
TECHNICAL SPECIFICATIONS
MODEL
ST330 ST530
Electrical
Frequency Range (MHz) 3 - 30 5 - 30
Polarization
Horizontal
Power Rating-Average
Optional to 1 kW
VSWR
Typically less than 2:1, Max. 2.5:1
Radiation Pattern
Directional
Connector
"N" Socket
Mechanical
Mast Height (m) 19 15.5
Mast Guy Radius (m) 14 11
Ground Dimensions Vee Length (m) 100 80
Vee Width (m) 80 63
Wind Rating aluminium (MA) (km/hr) 160 160
steel (MS) (km/hr) 230 230
Specifications may change without notice

AZIMUTH RADIATION PATTERNS
RFS Radio Frequency Systems ST330 azimuth radiation patterns


ELEVATION RADIATION PATTERNS
RFS Radio Frequency Systems ST330 elevation radiation patterns


GAIN
ST330 ST530
RFS Radio Frequency Systems ST330 gain RFS Radio Frequency Systems ST530 gain


ANTENNA PICTURE
picture RFS Radio Frequency Systems ST Series


ORDERING INFORMATION
Example Model
Power/Impedance Wind Rating Mast Requirements
ST330*110 ST330 * 1 1 0




1 50 W Av./50 ohm 1 160 km/h 0 None



2 250 W Av./50 ohm 2 230 km/h 1 Mast and Stub
Mast kit (MA)



3 1 kW Av./50 ohm
2 Mast and Stub
Mast kit (MS)





3 Mast, Stub
Mast and Jury mast kit (MA)
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