The ferrite Rod is a reasonably effective Receiving Antenna for LW MW and Lower HF spectrum .It is well known that a ferrite rod is much more effective than an air cored coil of the same dimensions .An array of ferrite rods would receive more power if tuned and phased properly.If all the rods were bundled together would they act as one large diameter rod ?If the rods were spaced many diameters apart they would be independant .How far apart is reasonable ? Would a spaced array be better than bundled rods due to a bigger capture area ?

  • $\begingroup$ I've not tried this, but it's an interesting idea. The spacing between the antennas would need to be worked out. Ferrites bend magnetic flux lines into themselves, so I suspect if the antennas are too close to each other they will "steal" signal. $\endgroup$ – user103218 Dec 16 '19 at 14:49
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    $\begingroup$ I did some modeling in Ansys of ferrites at 100's of kHz, and observed what looks like the magnetic analog of the "skin effect". I suspect that if you took a tube of some diameter and placed ferrite rods like a fence around the perimiter, the bundle would act similarly to a single large ferrite. Probably not quite as good, but a lot lighter and less expensive. $\endgroup$ – user103218 Dec 16 '19 at 14:52

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