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There's another interesting thing about very fat antennas.
Again considering them as transmission lines, their Zo is quite low and so the input, or end impedance of a half-wave dipole is relatively low. Thus it is possible to place two half-wave dipoles in series and feed them in the middle. (In the same way as feeding one half-wave dipole in the middle). What does the radiation pattern of a full-wave, exceedingly fat dipole look like? Can the modelling programs cope? What's the feedpoint impedance at resonance? What's the bandwidth? What about a 4 or 5-to-1 ratio for Length / Diameter? ---- Reg. |
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