enrico
Member level 3
cascade nf
Hi All,
Everytime when I try to plot the noise figure from a cascade using standard s-parameters files involving amplifiers and filters in between I get a warning message in the microwave office (or similar like Genesys) saying that for example the filters does not contains noise parameters, so therefore the device will be treated as noiseless.
Since the filters are passive devices, so the noise figure it is their own insertion loss I cannot understand how to contour this problem.
Suppose I have a cascade of two amplfiers with their full and respective s-parameters files containing noise data and a filter in between. The filter also is modeled using its respective s-parameter file but does not contains data.
Since the the noise figure from the filter is commanded by its own insertion loss, How this problem could be solved ? (in case I want to plot the noise figure of the whole chain including the filter).
It must be a way how to tell it to the simulator, in e.g. microwave office since the S21 (or S12) plot represents its own noise figure.
Any ideas are very welcome !
Hi All,
Everytime when I try to plot the noise figure from a cascade using standard s-parameters files involving amplifiers and filters in between I get a warning message in the microwave office (or similar like Genesys) saying that for example the filters does not contains noise parameters, so therefore the device will be treated as noiseless.
Since the filters are passive devices, so the noise figure it is their own insertion loss I cannot understand how to contour this problem.
Suppose I have a cascade of two amplfiers with their full and respective s-parameters files containing noise data and a filter in between. The filter also is modeled using its respective s-parameter file but does not contains data.
Since the the noise figure from the filter is commanded by its own insertion loss, How this problem could be solved ? (in case I want to plot the noise figure of the whole chain including the filter).
It must be a way how to tell it to the simulator, in e.g. microwave office since the S21 (or S12) plot represents its own noise figure.
Any ideas are very welcome !