HFSS simulation problem: suspended microstrip line

Dear everyone

I have simulate a simple EBG structure, single layer mushroom-liked EBG structure, as in attachment. However, I cannot get the same result as shown in Fig. 3 in the paper. What's wrong with my simulation, please help me!

THX!

hi

I have problem to open your hfss file. please upload it again

Thanks for reply and sorry for the version. I have changed the version to v.11.
The transmission is about 7.3GHz. However, the paper is about 7.46GHz.
I am wondering what cause the error.