This sounds like a de-embedding problem. Problems like this are often
seen in particular with low loss material measurements.
Steve
On 4/14/2015 6:41 PM, 黄涛 wrote:
Hi experts,
Sorry for messy code of this question previously .
We characterize insertion loss by xx.xx dB/inch usually.But after we
measured total loss of trace,the loss per unit length calculated by
different length are difference .For example ,one 4inchs trace measured and
calculated loss A dB/inch .and one 8inchs teace measured and calculatd loss
B dB/inch while other parameters of design are same.The A is a little
greater than B alwalys.
My question is:why are there difference ?from measurements?design ?or any
others ?
T hanks
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