difference between schematic and layout in ads 2016

Hello All
in order to make optimisation in my patch antenna used in my school project
i create an component with The layout like figure 1 and 2 attached and a shematic file that call the component and simulate the optimisation to give me the Best radius and port place (shematique attached in fig 3 and 4 )
my problem is that :
when i receive the value of X and R optimized and i simulate this result with shematic : i receive a result optimized of the DbS(1,1) and satisfied my goal perhaps when i put the same valus of X and R in my layout i obtain an different result for the DbS(1,1) that is totally different of the result of schematic
can you tell me please why i have this different and how i can resolved

附图/附件

fig 1 layout.PNG

fig2.PNG

fig3.PNG

fig4.PNG

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