On Sep 23, 11:03*pm, "justme" wrote:
I GET DIFFERENT RESULTS WHEN COMPARING TO A GRAPH.

Exact impedance of ladder line is usually unimportant. It is so low-
loss, that even large impedance mismatches do not result in any
appreciable transmission line losses.

Another thing, base 10 log and natural log often are confused.

Tim N3QE