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 Air Coil Antennas aim to solve

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

  • Magnetic path distributes through cylindrical magnetic material and air
  • High Q factor → narrow frequency bandwidth
  • Directionality → uni- or bidirectional

+ Ferrite rod antennas are smaller and weigh less compared to air loops for the same inductance, especially at frequencies between 100kHz -1.6MHz 

+ Rod core antennas outperform air loop antennas in signal-to-noise ratio

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 signaling communication
  • Telecommunications
  • Direction finder receivers
  • Radio compass receivers

Frequently asked questions

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