Adjust port location for patch antenna by ADS

hi

i have Q

i use ADS 2011 to design patc antenna in diffrent configuration.

if i change the port location on edge it means not in center that change will effect the result
also if put the port inside the edge

so its must be the port in center of patch antenn edge or not.

i know , i alawyse make the port in center
me be the problem from ADS2011 simulation

please i neeed help.

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