Hi Akshay, Which version of spectre are you using? What have you set the "interpolation method" to on the nport? In general nowadays we'd recommend leaving the fmax parameter blank, and ideally using "bbspice" as the choice for interpolation method. I'd also suggest you look at this excellent presentation from my colleague Tawna Wilsey: 7 Habits of Highly Successful S-Parameters Regards, Andrew.![]()
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