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I have to admit I've been following this phase discussion and it's making little sense to me. Phase changes along the length of the radiator not from the side angle you are looking at. It's the length of the radiator from the source that determines the phase.


Perhaps I'm missing something here but I can tell you for sure that EZNEC does not get the phase correct on the Sigma design and that is easily proven when constructing a collinear version.