Hello,
I'm currently designing a microstrip half-wavelength coupled line passband filter at 37 GHz.
My theoretical design produces beautiful results in ADS' schematic simulator, but when I do a Momentum full-wave simulation on the same circuit, the results are quite different.
Now I know they're not supposed to be the same, and Momentum's results do resemble a passband, but my S-parameters can be off by as much as 5dB to 10dB which makes it extremely difficult to tune. I simply wasn't expecting such a huge difference.
Is this normal? If it isn't, could anybody tell me if there are certain parameters to be optimized so that the simulation results are more coherent with eachother?
Thank you.
I'm currently designing a microstrip half-wavelength coupled line passband filter at 37 GHz.
My theoretical design produces beautiful results in ADS' schematic simulator, but when I do a Momentum full-wave simulation on the same circuit, the results are quite different.
Now I know they're not supposed to be the same, and Momentum's results do resemble a passband, but my S-parameters can be off by as much as 5dB to 10dB which makes it extremely difficult to tune. I simply wasn't expecting such a huge difference.
Is this normal? If it isn't, could anybody tell me if there are certain parameters to be optimized so that the simulation results are more coherent with eachother?
Thank you.
I then adjusted the number of sample points in the frequency sweep to around 500.
An Apps engineer from Agilent, stated if you run enough samples points to where the response doesnt change much, you probably then would have an accurate simulation.