How do I find S parameters from Z parameters, for a two port network.

I am sorry to ask such an elementary question but I am not from an engineering background. I have tried to search answers online but could not find it.

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    \$\begingroup\$ See if this helps. en.wikipedia.org/wiki/… A text book is given as reference. See if you can get a hold of that book. \$\endgroup\$
    – AJN
    Jul 3, 2020 at 13:18
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    \$\begingroup\$ rfcafe.com/references/electrical/s-h-y-z.htm \$\endgroup\$
    – Andy aka
    Jul 3, 2020 at 13:38
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    \$\begingroup\$ Here’s another website ... so what were you searching for in order to get no results or results you didn’t like? \$\endgroup\$
    – user103380
    Jul 3, 2020 at 13:57
  • \$\begingroup\$ I think this is a great question, if we don't have a duplicate someone should provide an answer and document the answer here \$\endgroup\$
    – Voltage Spike
    Jul 4, 2020 at 17:07

1 Answer 1


This table gives the relationship between S, Z, Y and ABCD parameters. It's from David Pozar's "Microwave Engineering", 4th edition, page 192. If you are interested on the details, you can consult the book.

Table 4.2 from Pozar

  • \$\begingroup\$ Though the answer does not explain how the transformation is made, but I accept it. \$\endgroup\$ Jul 6, 2020 at 7:36
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    \$\begingroup\$ @ChetanWaghela Z parameters relate currents to voltages. To do the transformation you must find the relationship between currents, voltages and incident and reflected power waves. I will add it to the answer later. \$\endgroup\$
    – MPA95
    Jul 6, 2020 at 21:19

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