Description

How it behaves

  • The magnetic field of an rod core antenna has a directional radiation pattern, because the magnetic path distributes itself through the cylindrical magnetic material and air

What do Rod Core Antennas aim to solve

  • Narrow band & high efficiency wireless communication
  • High signal-to-noise ratio
  • Smaller antenna volume and weight

  • Ferrod or rod core constructed from specialised high-frequency magnetic material → Higher permeability & lower energy loss
  • High Q factor → Low dissipation factor and narrow frequency bandwidth
  • Directionality → forms bidirectional radiation pattern

+ Higher signal-to-noise ratio for the same volume → Space efficiency higher compared to air coil antennas

+ Smaller and lighter compared to air loops for the same inductance → Most advantageous between 100kHz -1.6MHz 

Inductance 1µH - 2.5mH
Q Factor * 60-200
Frequency ** 100kHz - 13.5MHz

* Depends on working frequency range
** High frequencies, especially above 10MHz, will limit power handling

  • Hearing aids
  • Railway signalling communication
  • Telecommunications
  • Direction finder receivers
  • Radio compass receivers
  • IoT devices

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