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Right port dimensions for microstrip line in CST, time doman

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leo333

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Hi!

What dimensions should have a port for a 50Ohm microstripline (1.1mm width and 8mm length) on a 0.5mm thick Rogers 4003 substrate (Er=3.55, tandelta=0.0027) for CST time dom. simulation for freq 0-40 GHz? It is something wrong width my s21 insertion loss - much more than that of the same line simulated in ADS and in HFSS.
Can somebody help me?
Thanks
 

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