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Old May 2nd 06, 11:01 PM posted to rec.radio.amateur.antenna
Reg Edwards
 
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Default Wire diameter vs Impedance

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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