help about choice of software

I want to simulate these papers http://www.4shared.com/office/DS5kKpqN/00659290.html
i dont know which software i have to use,MATLAB ,HFSS, CST MWS ,XFDTD
please help,i dont have much time...

Generally you could use MATLAB for FDTD simulations, but you could also use XFDTD for simulating waveguide structures.

Regards
Elchiquito

which software i have to use for moddeling insertion loss and isolation?
please help!