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I need to plot a graph of the reflection coefficient against the frequency.I ran an AC sweep of in the range of frequencies I need. However I am unsure of how to get the reflection coefficient on the y axis for the circuit I want to stimulate. Will I have to use an additional component ?. Anybody familar with PSPICE please advice?.

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  • \$\begingroup\$ does anyine have any idea about this please \$\endgroup\$ – user63377 Nov 12 '15 at 15:13
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You need to find a means to measure input voltage and input current from your circuit. Then you can convert to complex impedance: Zl = V/I

Then gamma = (Zl - Zo) /(Zl + Zo) where Zo is the transmission line impedance.

You may be able to use an AC current source Into the DUT to find impedance

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