pir0texnik
Member level 3
Why simulators like HFSS and CST use (as a default) absolute convergence criterion not relative? I guess the last method could be more accurate because it for example can make difference between s11=1, s11(n-1)=0.9 and s11=0.2, s11(n-1)=0.1. In the first case relative error is 11% in the second - 200%, but absolute error is constant = 0.1. Why so?