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Broadband Omnidirectional HF Whip Antenna

Rev : 01 | Rev date : 13 Sep 2021

The model HF28B-S is a versatile and rugged whip antenna for use in HF transmitting and receiving applications. The antenna is designed for short-distance transmission using ground waves, and medium to long-distance transmission via ionospheric propagation The HF28B-S can withstand severe environmental conditions, and the low wind loading of this antenna makes it ideal for mounting to a wide range of structures. 
It is supplied in two sections for assembly during installation. The top section is a tapered fibreglass whip and the lower section is made from heavy-duty marine anodised aluminium tubing with a hot-dipped galvanised base. Its overall length is 8.5 meters (28 ft).
An electrical connection terminal is provided underneath the antenna. The antenna is required to be mounted vertically above a suitable ground plane, such as the metallic deck of a ship or a suitable ground radial system when mounted over soil.
With the use of an appropriate antenna tuning unit (ATU) the antenna can be used within the frequency range of 1.5 MHz to 30 MHz.


  • For transmit and receive applications
  • Rugged construction for severe environmental conditions
  • Heavy-duty anodised aluminium tubing with hot-dipped galvanised base for maximum corrosion protection
  • Suits deck mounting on marine vessels or above ground with suitable base-mount and ground radial system (supplied separately by RFS)
  • Vertical polarisation


Technical features

Electrical Specifications

Frequency Range MHz1.5 - 30
Elevation Radiation PatternRefer to plot
Azimuth Radiation PatternOmni Directional
Nominal Gain (Mid-band) dBd0
Input Connector12 mm diameter stud

Mechanical Specifications

Number of ChannelsMulti-channel
Antenna Height m (ft)8.5 (28)

Base plate diameter (mm) : 315

PCD (mm) : 273

Fixing holes (number and diameter) : 8 x 18 mm diameter

Wind Survival Rating (no ice) km/h (mph)160 (100)


MaterialWhip : Aluminium (anodised) and fibreglass
Base : Hot dipped galvanised steel

HF28B-S Whip Antenna dimensions

External Document Links