thank u vinoth8051
i need scattering parameter matrix of microstrip discontinuities...
If you have the rf circuit toolbox you can do something along these lines :
Width1=5e-4;
Width2=3e-4;
Ms1 = rfckt.microstrip('LineLength',1e-2,'Width',Width1,'Height',6e-4,'Thickness',7e-9,'EpsilonR',8.9);
Ms2 = rfckt.microstrip('LineLength',1e-2,'Width',Width2,'Height',6e-4,'Thickness',7e-9,'EpsilonR',8.9);
Ms = rfckt.cascade('Ckts', {Ms1,Ms2});
analyze(Ms, 0.5e9:1e7:5e9);
plot(Ms, 'S11', 'dB');
Sparam=Ms.rfdata.S_parameters;
Sparam has your s-parameters in matrix form