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Network TheoryTwo-Port Networks

For a symmetrical two-port represented by z-parameters, which relation holds?

  • Az11=z22
  • Bz12=0
  • Cz21=0
  • Dz11=z12 always
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Correct Answer: A. z11=z22
Explanation: Symmetry means interchanging the two ports leaves the network behavior unchanged, which requires z11=z22.
Reference: Standard network theory: symmetrical z-parameters
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