WAUGH,RAY (HP-SanJose,ex1) wrote:
> Guys...
>
> Field solver software??? I'd be careful about going down that road to
> answer a relatively simple question. Such software is very expensive and
> takes a great deal of understanding (of e-m theory) to use. I am a
> RF/microwave circuit designer with an electromagnetic theory background, and
> I know of very few of my kind who can use such a tool effectively.
>
> As Adrian Shiner put it so accurately, "...you get both in some proportion
> no matter how you think you have designed in one mode."
>
> Ray Waugh
>
> _/ Raymond W. Waugh - WSD Diode Applications
> _/ E-mail: [email protected]
> _/_/_/ _/_/_/
> _/ _/ _/ _/ USPS : Wireless Semiconductor Division
> _/ _/ _/_/_/ 39201 Cherry Street, MS NK20
> _/ Newark, California 94560
> _/
>
> -----Original Message-----
> From: [email protected] [mailto:[email protected]]
> Sent: Thursday, July 15, 1999 1:49 PM
> To: [email protected]
> Subject: [SI-LIST] : even-odd mode influence
>
> Weber,
>
> To be able to simulate even-odd mode effects, you'll have to model the
> conductors as a system of coupled transmission lines. There are not many
> simulators that can do it, and even the ones that can are pretty limited to
> the
> number of conductors they can handle. Many of them can only handle lumped
> models, where what you really need to see what's going on is a true
> distributed
> model. You'll need a field solver to extract the coupled transmission line
> matrices - it's not easily done analytically. Take a look at Ansoft,
> Applied
> Simulation Technology, and Pacific Numerix. HSPICE can model coupled lines
> using geometric input (conductor size, spacing, etc.), but I can't vouch for
> its
> accuracy.
>
> Jay Diepenbrock
>
> Senior Engineer
> Interconnect Technology & Qualification
> IBM Global Procurement, B8UA/061, RTP, NC
> Phone: 919-543-8804 Fax: 919-543-3642
> Email: [email protected]
>
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