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Broadband Monopole Antenna WM Series 2 - 30 MHz

Rev : 03 | Rev date : 25 Nov 2021

Designed for medium to long distance Omnidirectional operation, RFS Monopoles are vertically polarized and are characterised by a broad frequency bandwidth and low angle radiation patterns.

With high power handling, 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 electro-chemical corrosion.
Monopole antennas require a radial ground mat system for specified performance. Ground mat kits are supplied with each antenna. The radiator comprises a 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.


  • Power ratings from 1kW to 50kW.
  • Ground mat kits included with each antenna.
  • Radiators manufactured from marine-grade stainless steel wire.
  • Triangular galvanised steel mast.
  • Insulated tower base fitted with lightning protection.
  • Designed for severe environments, wind rating of 306km/h.
  • Stainless steel mast option available. Consult RFS.


Technical features

Electrical Specifications

Gain dBiup to 8, refer to graph on page 2
Azimuth Radiation PatternTrue Omni Directional
VSWR<2.5:1 Max, 2.0 to 2.15MHz, <2.0:1 Max, 2.15MHz to 30MHz
Maximum Power Rating kWMax 50kW average, 100kW PEP (Depending on input connector)
Input ConnectorN-type (1kW)7/8" EIA (10kW)1-5/8" EIA (15kW)3-1/8" EIA (40kW)
Impedance (unbalanced), ohmsΩ50

Mechanical Specifications

Earth Mat Radiusm (ft)38 (125)
Wind Survival Rating (no ice) km/h (mph)306 (190)
Wind Load CommentSee Note 1


Material - GuysGalvanised steel and heavy duty fail-safe insulators
Material - MastGalvanised steel. Stainless steel option
Material - Earth Mat64 Radials of 16SWG (1.6mm) Copper wire


Shipping informationPacked weight [kg]Packed size [m]
WM230 (less Mast)4302.0 x 2.0 x 0.3 and 5.0 x 1.5 x 0.25
MS3-30/34 Mast (34m)8912.3 x 0.9 x 3.0

Antenna Ground Dimensions

External Document Links


1. Wind ratings are calculated to Australia standard AS1170.2:2011