Using a point source as an excitation signal in CST

is there a way of using a point source as an excitation signal in CST? all i can see are ports and CST doesnt allow me to excite just one corner of a cell and use that as my source.

I usually use dicrete port as a point source in simulating the dipole structure. Did you try?

its too late to answer but for others who are currently looking for the answer
i have a suggestion ...
How about specifying small size waveguide port at the location where one want to place point source.