s2scc

Convert single-ended S-parameters to common-mode S-parameters (Scc)

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Syntax

scc_params = s2scc(s_params)
scc_params = s2scc(s_params,option)

Description

scc_params = s2scc(s_params)converts the 2N-port single-ended S-parameters to N-port common-mode S-parameters.

example

scc_params = s2scc(s_params,option) converts S-parameters based on the port-ordering convention specified in option argument.

Examples

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Open Live Script

Convert network data to common-mode S-Parameters.

s_params = sparameters('default.s4p');
s4p = s_params.Parameters;
s_cc = s2scc(s4p);

To display common-mode S-Parameters at the first frequency, type the following command:

s_cc_new = s_cc(:,:,1)
s_cc_new = 2×2 complex

   0.1799 - 0.1839i  -0.5300 - 0.6771i
  -0.5314 - 0.6800i   0.1756 - 0.1910i

Input Arguments

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2N-port single ended S-parameters, specified as a 2N-by-2N-by-M array of complex numbers, where M represents the number of frequency points of 2N-port single-ended S-Parameters.

Port order, a scalar, specified as 1, 2, or 3. Port order determines how the function orders the ports:

  • 1 — s2scc pairs the odd-numbered ports together first, followed by the even-numbered ports. For example, in a single-ended, 8-port network:

    • Ports 1 and 3 become common-mode pair 1.

    • Ports 5 and 7 become common-mode pair 2.

    • Ports 2 and 4 become common-mode pair 3.

    • Ports 6 and 8 become common-mode pair 4.

    The following figure illustrates this convention for an 8-port device.

    Convention for an eight-port device

  • 2 — s2scc pairs the input and output ports in ascending order. For example, in a single-ended, 8-port network:

    • Ports 1 and 2 become common-mode pair 1.

    • Ports 3 and 4 become common-mode pair 2.

    • Ports 5 and 6 become common-mode pair 3.

    • Ports 7 and 8 become common-mode pair 4.

    The following figure illustrates this convention for an 8-port device.

    Convention for an eight-port device

  • 3 — s2scc pairs the input ports in ascending order and the output ports in descending order. For example, in a single-ended, 8-port network:

    • Ports 1 and 2 become common-mode pair 1.

    • Ports 3 and 4 become common-mode pair 2.

    • Ports 8 and 7 become common-mode pair 3.

    • Ports 6 and 5 become common-mode pair 4.

    The following figure illustrates this convention for an 8-port device.

    Convention for an eight-port device

Output Arguments

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N-port common-mode S-parameters , returned as an N-by-N-by-M array of complex numbers, where M represents the number of frequency points of 2N-port common-mode S-parameters (Scc).

References

[1] Fan, W., et al. “Mixed-Mode S-Parameter Characterization of Differential Structures.” Proceedings of the 5th Electronics Packaging Technology Conference (EPTC 2003), IEEE, 2003, pp. 533–37. DOI.org (Crossref), doi:10.1109/EPTC.2003.1271579.

Version History

Introduced in R2006a

See Also

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