multilayer antenna

i 've simulate an antenna with combination of duroid n foam (both loss free) using cst.. i'm not going to fabricate it.. its just for my study.. can someone take a look at the result.. i'm not sure about the result especially the smith chart.. is it correct?

hi, wanie84
i have a good advice about multilayer antenna designing, you can adopt LTCC technology to realize antenna configuration you needed.
the attachment is a reference