How to use CST to get capacitive microstrip structure

sorry, i did not know about this~~~is there some course to show me this? thanks a lot~~~

can you explain more about (capacitive microstrip structure).

for example, in the picture below i added, that is capacitance of microtrip that i tried to do by CST, but i did not know how to make sure the value of it that i wanna~~~~please give me a direction, thanks a lot~~