Open edumur opened 7 years ago
Who is right?
both. (actually the formula you reported above has an error, but not related to the unit of loss)
That's interesting. Do you mean that:
Thanks for very fast reply ;) .
but checking the sources/references I saw that the Qucs documentation is confusing, since it uses different units for the same quantity in the same chapter, see http://qucs.sourceforge.net/tech/node86.html
Well this is where I started my journey about the formula. If the reference [39], Gupta in the documentation, is wrong, don't you think that should be made clear in the documentation?
reference [39] is K. C. Gupta, R. Garg, I. J. Bahl, and P. Bhartia, Microstrip Lines and Slotlines, 2nd ed.Artech House, Inc., 1996. which, curiously enough, has the correct expression. I guess the one you quoted above is from the third edition, or?
Good catch! My bad, it effectively comes from the third edition.
I would then say that everything seems correct to me. If you agree, I think this thread can be closed.
And thanks again!
thanks - I reopened the issue, changing the title to remind to clarify the loss units in the CPW docs
EDIT: loss formulas for CPW at see http://qucs.sourceforge.net/tech/node86.html use different units - this is confusing
In the cpwline.cpp it looks like the conductive losses are calculated as if the result of the formula from Ghione is in Neper/meter. However in the Gupta, author claims that the formula is in Db/meter
Who is right?