HFSS: a helical antenna modeling question

Hello,

I try to model a helical antenna with Ansoft HFSS 8 The antenna is made
of a printed line (approx 0.200" width, f= 1600 MHz) on a flexible
substrat that then I roll onto a cylinder.
The problem is that I try to model it starting with a rectangle (0.200 x
0.0014") which I then use to builx the helix using the solids-helix
macro.
If I set about 16 segments / turn, then I get a structure that not
resemble what I need, if I try a more detailed representation, I run out
of memory and time. I found that a helical wire with a rectangular or
circular section is more efficient in terms of computation and is less
sensitive to the "twisting" approximation.

What I am looking for is an equivalency between a "square" or "circular
" wire width and the "strip" line width so I get some good impedance
prediction, by still running the simulation with a "square" or
"circular" wire.
I appreciate if anyody could point me in the right direction.

Thank you
Cornel Gazdaru
Received on Thu Oct 04 2001 - 00:40:32 EDT