[SI-LIST] Re: Serpentine/Spiral Lines (was Re: Trace Bends)
- From: Neeraj Pendse <cnepsc@xxxxxxxxxxx>
- Date: Wed, 01 May 2002 11:55:47 -0700
Chris and all,
I believe the new e-mail address for Dr. Ramahi is
oramahi@xxxxxxxxxxxxxx Since about an yeat ago, he has joined the
faculty of the University of Maryland at College Park.
- Neeraj
> Chris Padilla wrote:
>
> This is slightly off-topic of trace bends but one of the main reasons some
> of us worry about trace bend is they are chiefly used to create time
> delays. This method is known as "serpentining."
>
> There was a paper presented at the 16th Annual Applied Computational
> Electromagetics symposium presented at the Naval Postgraduate School in
> Monterey, CA from March 20-24, 2000.
>
> "FDTD Analysis of Conventional and Novel Delay Lines" by Omar M. Ramahi (he
> is the co-author of a great little handbook: "EMI/EMC Computational
> Modeling Handbook") Try him at Omar.Ramahi@xxxxxxxxxx but I've no clue if
> that email address is still viable...I have my doubts! :|
>
> Basically, the paper talks about delay lines and minimizing crosstalk while
> maintaining the same spacing and density of the serpentined line. The
> conclusion is to use a spiral method of delay line. This is difficult to
> describe without a picture, unfortunately.
>
> Being an EMI Engineer, I wonder about the EMI radiation from such a
> structure as a whole rather than just the many 90-degree bends present!
>
> Two references were sited:
>
> R-B. Wu and F-L. Chao, Laddering wave in serpentine delay line, IEEE Trans.
> Components, Packaging and Manufacturing Tech., Part B: Advanced Packaging
> vol. 18, no. 4, pp. 644-650, Nov. 1995.
>
> R-B. Wu and F-L. Chao, Flat spiral delay line design with minimum crosstalk
> penalty, IEEE Trans. Components, Packaging and Manufacturing Tech., Part B:
> Advanced Packaging vol. 19, no. 2, pp. 397-402, May 1996.
>
> Thanks----->Chris
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