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A question about SMA connector to PCB

Question asked by hhhunter on Apr 4, 2018
Latest reply on Apr 11, 2018 by mthahira

Hi, everyone. Why a big step is designed at the IF port, which I marked using a red arrow? I think big strip width change means poor impedance matching. I don't know the reason of this design. Is there anyone can give me some advice or some paper about this?