Hi.

I recently bought a copy of IPC-D-317A.  Page 24 in section 5.5.5.1
shows equation 5.42a) for differential stripline impedance Zo with the
exponent "-.6B".  Could I have a definition of "B"?  Is it a ratio of
two physical parameters?

Section 5.5.4.1 (also on page 24) has "B" defined as "Height above
reference plane", but it also has "H" defined exactly the same way.  So
I don't know what to make of "B".

Also, which reference in the Bibliography on page 69 applies to this
issue?  I would like to acquire it and read it.

Thank you very much for your help.

Larry Martin
Compaq Computer Corp.
Colorado Springs, CO
719/548-6877

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