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Ian Jackson wrote:
snip If a permanent magnet was oscillated inside a loop of wire, it would produce an oscillating current in the loop. An oscillating current would produce RF radiation (especially if it was tuned with a capacitor to the frequency of the magnet's oscillation). In which case you have a generator producing AC voltage. The question then is, "is the wire loop necessary to produce RF radiation?" The wire loop is necessary to produce an AC voltage. An AC voltage applied to an antenna produces RF radiation. Before tubes were invented, high frequency AC generators were used to generate high frequency AC voltage which was applied to antennas. -- Jim Pennino |
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