Radio Frequency Systems company website is optimized for recent browsers :
IE9+, Chrome 31+, Firefox 31+, Opera 28+, Safari 7+

My e-catalog

Broadband Biconical Dipole 3 - 30MHz

Rev : 01 | Rev date : 07 Sep 2021

This broadband series of antennas covering 3 to 30MHz are designed for short to medium range transmitting or receiving applications. Polarization is horizontal and pattern essentially omnidirectional.



  • These antennas, being broadband, do not require tuning, thus eliminating the need for any form of antenna tuning unit (ATU) with its associated losses.
  • No terminating resistors are employed and so full power is available for radiation.
  • The broadband feature is ideal for multi-channel or frequency agile synthesized HF radio equipment.
  • The antenna comprises two horizontal conical sections, the elements of which are connected in the centre to a common feed line. Either a 300-ohm balanced line, or a 50-ohm coaxial feeder with a balun option may be used to feed the antenna.
  • Average power rating of the standard antenna is 10kW with higher rating for special order.
  • Baluns are available with an average power rating of 1kW and 10kW. Higher ratings are also available.



Technical features

Electrical Specifications

Gain dBi6-8 typical (refer to graph)
Azimuth Radiation PatternEssentially Omnidirectional
VSWR2.0:1 typical, 2.5:1 max (refer to VSWR graph)
Maximum Power Rating kW10 average, 40 PEP with balun option
Input ConnectorN-type (1kW) 50ohm1-5/8" EIA (10kW) 50ohmOpen wire (10kW) 300ohm
Impedance Ω50 unbalanced with balun300 balanced

Mechanical Specifications

Wind Survival Rating (no ice) km/h (mph)205 (127.4)
Wind Survival Rating with 10mm Radial Ice km/h (mph)130 (80.7)
Wind Load Commentto AS1170:2.2011


Material - GuysGalvanised steel.
Material - MastHot dipped galvanised steel


Shipping informationPacked weight [kg]Packed size [mm]
BDH330180900 x 900 x 600
MS3-30/34 Mast (21m)400600 x 1200 x 3040
SMBDH Stubmast182800 x 100 x 100
T1000-530 balun4included with antenna
T10K-530 balun70920 x 660 x 570

External Document Links


  1. Other power ratings available on request. Contact RFS.
  2. Radiation Patterns are above average ground.
  3. 0° on azimuth radiation patterns corresponds to the reference direction shown on the antenna ground dimension diagram.