Circular patch Simulation problem on CST

hello guys...

i have a project to design a circular patch on CST and i did but i the program stops the simulation stops at some level because "matrix cannot be solved " and so i uploaded the File so if anybody got any ideas on how to correct this problem i will be very grateful and thanks

CST circular patch.rar

are you sure about all the dimensions of your setup ? you seem to have quite a big patch (for solving at 60 GHz)

you must also be careful about your feed, there would be multiple modes propagating in your current setup.

you might also find the attached file useful. see slide 12 onward for details on setting up of ports in CST.

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