"John" wrote in message
...
"Roy Lewallen" wrote in message
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John wrote:
I don't know what NEC-2 is able to do. Does this mean I can model
folded
monopoles?
John
Sure. But you can't accurately model ones made with twinlead or window
line, since NEC-2 or EZNEC can't account for the effect of the
dielectric.
Roy Lewallen, W7EL
Okay, great!
I modeled a folded monopole at 434 MHz. Varying the length down from
resonance, the element showed the terminal impedance getting lower in
resistance and become increasingly capacitive just like the unfolded
monopole.
I thought it was supposed to be backwards from the usual unfolded monopole
such that it would go up in resistance and become inductive.?.
John
Did you go down to 217 MHz and below? If not, check it out. Should hit
another resonance at something like 50,000 +j0, and stay inductive below
that.
Tam/WB2TT
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