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Integrate or divide the input impedance for transmission lines in series?
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[QUOTE="f95toli, post: 6850645, member: 87679"] This might be obvious, but there is a very good reason for why we do our very best to make sure all segments are as close to 50 Ohm as possible(or 75 Ohm if that is what you are using) . Yes, you can analytically handle imperfections using Z- or S-parameters but if you are in a situation where a bunch of "accidental" mismatches have a significant effect on what you are doing it is also very likely the case that the only way you will be able to understand what is going on is by actually measuring the whole line assembly using a VNA or some form of TDR, modelling is not very useful. There are of course situation where you introduce mismatches on purpose (say in a stepped impedance filter), but typically you are then only dealing with small number of "steps" and the algebra becomes manageable. That said, if your goal is to actually design say a filter you will most likely going to be using Sonnet, HFSS or similar software. Also, all of this of course assumes that you are dealing with a single mode....If not, it gets very, very complicated. [/QUOTE]
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Integrate or divide the input impedance for transmission lines in series?
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