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Picturing the radiation?

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October 15th 14, 12:30 AM posted to rec.radio.amateur.antenna

Brian Reay[_5_] Brian Reay[_5_] is offline

Brian Reay[_5_] is offline

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Picturing the radiation?

On 14/10/14 22:05, wrote:
gareth wrote:
On antennae that are several half-wavelengths long (beverage, Rhombic, etc)
what does the radiative wavefront look like when close to the antennae, even
though it is presented in the literature as a plane wave further out?

Run just about any version of NEC and look at the near field data
and find out.

The reason that I ask is the on such longwires, there are parts of the
wire which will be radiating positively, and parts negatively, thereby
suggesting that the outgoing wave, spherical though it might be, has
a +/- modualtion were you to travrse its circumference?

Are you attempting to say the pattern has lobes in as many words as
possible?

If you follow his 'theory' through, try applying it to light (which
follows the same laws of physics).

Basically, he is confused.

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