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            RFS RADIO FREQUENCY SYSTEMS WM & BC SERIES

            GENERAL DESCRIPTION


            BROADBAND MONOPOLES - WM & BC SERIES

            photo RFS Radio Frequency Systems WM & BC Series Designed for long distance omnidirectional operation, RFS monopoles are vertically polarized and are characterised by low angle radiation patterns, and a wide selection of frequency ranges and bandwidths.

            With high power handling for general HF communication applications, these antennas provide an economical solution, with long term reliability and stability of electrical characteristics. Particular attention has been paid to the matching of dissimilar metals to minimise electrochemical corrosion as well as noise and intermodulation components.

            Monopole antennas require a radial ground mat system for specified performance. Ground mat kits are supplied with each antenna. The radiator comprises a biconical cage of stranded marine grade stainless steel wire.

            The standard support structure is a guyed triangular galvanised steel mast supported on a heavy duty ceramic insulator. The insulated tower base is fitted with a horn gap for lightning protection. For every severe environments an option is available with the WM series for wind rating of 305 k/hr.

            The BC Series are essentially similar, in performance and mechanical arrangement, to the WM Series. However, they are more economical, and simpler to erect, at the expense of a reduction in bandwidth.

            RFS offers a complete planning and installation service as well as maintenance facilities for all products.

            Construction (WM and BC Series)

            RADIATOR ELEMENTS - constructed from marine grade stainless steel.

            GUY ASSEMBLIES - galvanized steel, with heavy duty fail-safe insulators isolating conducting sections.

            SUPPORT MASTS - Heavy duty welded galvanized steel masts.

            EARTH MAT - 64 radials of 16 SWG (1.6 mm) copper wire.

            Wind Ratings

            Cyclonic: 250 km/hr

            Extreme Cyclonic: 305 km/hr (optional)

            Feeder Connections

            A range of cable terminals and mounting fittings can be supplied, or accommodated, to specification. These include EIA series or Type N.

            TECHNICAL SPECIFICATIONS
            MODEL
            WM230 WM330 WM430 BC1.69 BC415 BC630
            Electrical
            Pattern Azimuth
            Omnidirectional
            Elevation
            refer diagrams
            Gain
            4 dBi nominal
            Impedance Nominal
            50 ohm unbalanced
            VSWR
            <2.5:1 from 2.0 to 2.15 MHz
            <2.0:1 from 2.15 MHz up
            Polarization
            Vertical
            Input power
            Max 40 kW average; 80 kW PEP
            Mechanical
            Band (MHz) 2 - 30 3 - 30 4 - 30 1.6 - 9 4 - 15 6 - 30
            Mast (m) 34 25 19 33 12 7
            Guy radious (m) 23 17 12 19 8 6
            Earth Mat Radius (m) 38 26 20 55 23 19
            Packed Vol. (cu. m) 9 7.5 5.6 2.2 2.8 1.5
            Packed Weight (kg) 1320 1090 820 1200 970 110
            Mast Sections
            MS3 (steel), 3 m long, 30 cm side, 30 kg/m
            Specifications may change without notice

            ELEVATION RADIATION PATTERNS
            RFS Radio Frequency Systems WM & BC Series elevation radiation patterns


            GAIN
            RFS Radio Frequency Systems WM & BC Series gain


            ORDERING INFORMATION
            Example Model
            Always 3 Input connection Always 0
            WM230*310 WM230 * 3 1 0





            1 N Type




            2 7/8" Strap




            3 1 5/8" Strap




            4 3 1/8" Strap
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