CST - How can I simulate blockage in CST

Hello everyone .

I am designing a reflector and to simulate the reflected pattern I imported the far-field pattern of my feed as a source. to simulate the likely blockage of the feed , I put a PEC block with the exact size of the feed in the focal point of the reflector , but I didn't see any difference . Then I decided to put a large obstacle in front of the reflector to see an exaggerated blockage , with the results obtained form this simulation I think there is a problem with my modeling. I'd appreciate it If you could help me with that .

bests

Ali












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