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Donald it is a fair question. Give me a bit of time. I'm modeling a 1/2 wave collinear (super J) J-Pole using the calculator at this location: http://users.marktwain.net/aschmitz/antennas/jpolecalc.html

I think this model uses a 1/4 wave phasing stub to drive the added top 1/2 wave. I will see if Eznec handles this as noted in the article and report. However, be aware that I see the same bottom condition I see in the S4, a little incomplete cancellation that does radiate a bit unless the setup is the worst case scenario.

[QUOTE="Marconi, post: 497884, member: 903"] Donald it is a fair question. Give me a bit of time. I'm modeling a 1/2 wave collinear (super J) J-Pole using the calculator at this location: [URL='http://users.marktwain.net/aschmitz/antennas/jpolecalc.html'][B][I]http://users.marktwain.net/aschmitz/antennas/jpolecalc.html[/I][/B][/URL] I think this model uses a 1/4 wave phasing stub to drive the added top 1/2 wave. I will see if Eznec handles this as noted in the article and report. However, be aware that I see the same bottom condition I see in the S4, a little incomplete cancellation that does radiate a bit unless the setup is the worst case scenario. [/QUOTE]

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