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[SI-LIST] Five Wire Formula in Wadell

From: Christian Schuster <cschuste@xxxxxxxxxx>
To: si-list@xxxxxxxxxxxxx
Date: Fri, 2 May 2003 11:18:19 -0400

Does anybody have experience with the five-wire impedance formula
in Wadell's "Transmission Line Design Handbook" (section 3.3.4, page 70)?

The five-wire problem refers to a center signal wire surrounded by four
ground wires at constant distance.

I have a "feeling" that the impedance comes out too high ...

BTW, I checked the errata sheet but couldn't find any changes to this 
formula.

Any other reference or a well-known example might help too.

Thanks! 

Christian Schuster
IBM 

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