So, to avoid having to return to previous messages:
Can the S11 of a line connected to an antenna be calculated as:
S11(system)=S11(antenna) * S21(line) * S12(line) ?

Thanks
Wayne

Check out http://www.rfcafe.com/references/electrical/s-h-y-z.htm
The usual method would be to convert the S matrices to ABCD
matrices then perform matrix multiplication on the cascaded
ABCD parameters. You then convert the resultant ABCD matrix to
an S matrix.
http://www.mathworks.com/access/help...oogle+ Search

Frank