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HF Passive Monopole


The HF passive whip monopole antenna is designed for deployment on permanent installations and includes a deployable groundplane. The antennas’ radiation pattern is suitable for medium to long range HF monitoring. The base of the antenna isolates the monopole whip from the ground structure and has an RF connector protruding from the side. The antenna has been designed to be permanently or semi-permanently mounted on fixed installations such as concrete plinths or other suitable structures. The mast is self-supporting and is able to withstand harsh wind environments without the requirement of stabilizing ropes. The glass fiber insulated radiator is segmented into 3 threaded interlocking sections to allow for more compact shipping. The antenna is intended for use in constructing DF interferometer arrays consisting of a number of MONOA0079 antennas.

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Frequency range 1 - 30 MHz
Polarisation Vertical
Gain See graph
Nominal input impedance 50 Ω
Connector N-type female
Length 10 m
Total mass 19 kg excluding packaging
Max whip dimensions (d x h) Ø 180 mm x 3300 mm
Base dimensions (d x h) Ø 450 mm x 250 mm
Base Plate Dimensions (d x h) Groundplane diameter
Groundplane diameter 20 m ground radials (supplied)
Mounting method Bolted to a concrete plinth Plinth with diameter of > 550 mm recommended Environmental: designed to meet the following
Wind survival 120 km/h
Water ingress rating IP66
Temperature -40 °C to +55 °C (operation)

    Product Applications

    Signals Intelligence
  • Radio Direction Finding
  • C-ESM

    Design Features

  • 1 to 30 MHz frequency range Rugged Extremely durable mast design Self-contained groundplane Glass fiber insulated radiator Incorporated lightning protection