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drawing a log-spiral antenna.

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farzad1373

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Hi every one.
i am trying to draw a log-spiral antenna in HFSS.
How can i draw it?
Regards
 

I did this a while ago, but I used a number of closed equation based curves. The formula is given by (see Wikipedia: Logarithmic spiral):

x(t) = a exp(bt) cos(t)
y(t) = a exp(bt) sin(t)

Was a bit of a pain to accomplish.
 
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