The answer here, as it is to so may binary questions, is that it behaves
in some ways like one, some ways like the other, and some ways like
neither.
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..
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Roy Lewallen, W7EL

If one were to find lossless material (superconductors?) for the short
antenna and it's corresponding matching network, what would happen as
the antenna became shorter and shorter compared with the half-wave
dipole? Would it simply approach an isotropic radiator?
Alan