which is right for rfid antenna simulation?

hi all,
the attached file is a rfid tag antenna simulaton model,and including vary kind of setting for S11 and VSWR. but i don't know which is right, some setup way are offen used by designer,so pls help me and tell me why?thanks a lot!

hi
u as the designer r the only person who can deside wether ur resulats r correct or incorrect,u know we dont know the index of ur design.

Can you post more information about the antenna and the design goal eg. with screen shots or so?

hi,flanello,all data and model included the attachment,i don't know which setup is right for S11 and vswr,

I didn't download your file.
What software are you using?
With screen shots or more information someone could help you even he hasn't the software you are using. Also it would be easier.