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The figure below shows the results for S11, S21, S12 and S22 [[parameters]]. A tracking crosshair has been used to read the value of |s21| at 1GHz. This value is 15.4dB. Note that the total input reflection coefficient and the total output reflection coefficient are both equal to or below -10dB at 1GHz and the overall |s12| of the circuit is negligible. This validates your design strategy based on the unilateral assumption. You will see in the next section that the computed values of |s21| (insertion loss or gain) is very close to the computed value of the power gain from the source to the load.
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