RF Toolbox™

s2sdd

Convert 4-port, single-ended S-parameters to 2-port, differential-mode S-parameters (S_dd)

Syntax

sdd_params = s2sdd(s_params,option)

Description

sdd_params = s2sdd(s_params, option) converts the 4-port, single-ended S-parameters, s_params, to 2-port, differential-mode S-parameters, sdd_params. sdd_params is a complex 2-by-2-by-M array that represents M 2-port differential-mode S-parameters. s_params is a complex 4-by-4-by-M array that represents M 4-port S-parameters.

The optional option argument indicates the port numbering convention that the S-parameters use.

option can be:

• 1 — Ports 1 and 3 are the input ports. Ports 2 and 4 are the output ports. The following figure shows this convention.

  

• 2 — Ports 1 and 2 are the input ports. Ports 3 and 4 are the output ports.

The default value of option is 1.

References

Fan, W., A. C. W. Lu, L. L. Wai, and B. K. Lok. "Mixed-Mode S-Parameter Characterization of Differential Structures." Electronic Packaging Technology Conference, pp. 533–537, 2003.

See Also

s2sdc

s2t