s2rlgc errors with s16p input

Hello,

I am using s2rlgc to convert measured S-parameters to RLGC matrices. When I pass the entire 16x16 S-parameter matrix to the s2rlgc function it returns the following error:

Error using s2rlgc_modified (line 295)

Cannot compute RLGC matrix for given data

The function works if I pass it a 2x2 subset of the S-parameter matrix, but anything larger returns the error.

E.g.:

output = s2rlgc(S_parameters(1:16,1:16,idx),length,freq) returns an error

but

output = s2rlgc(S_parameters(1:2,1:2,idx),length,freq) returns the RLGC values

Has anyone successfully used s2rlgc with a 4-port or larger dataset?

Thank you!

Answer 1

[Perdo]

s2rlgc only works for a 2-port network. You would need to break up your S-parameters into 2-port (s11, s12, s21, s22) and pass them separately in to the function.