electronicman
Member level 3
Hi, I designed band pass microwave filters using Agilent ADS for my project, and the simulations were perfect, but when I did the measurements, The whole results were relativily good but not like the simulated ones so I put the following questions that appear after analyzing the results.
why there is not a good reciprocity Snn not to some extents equal to Smm?
what cause the insertion loss at my resonate frequency instead of starting from zero,it started from -5db?
what causes my bandwidth to be narrower?
what type of losses I have to take into account when dealing with filters?
(mismatch, coupling, parasitic elements)
how can I recognise these type of losses by using just only the s11,s12,s21,ans s22 data file from VNA,which for which.
thanks
why there is not a good reciprocity Snn not to some extents equal to Smm?
what cause the insertion loss at my resonate frequency instead of starting from zero,it started from -5db?
what causes my bandwidth to be narrower?
what type of losses I have to take into account when dealing with filters?
(mismatch, coupling, parasitic elements)
how can I recognise these type of losses by using just only the s11,s12,s21,ans s22 data file from VNA,which for which.
thanks