I am trying to simulate a simple slot antenna in HFSS, but the gain for my antenna(~6db) far exceeds what was stipulated by theory(~2ddB). Worse still, the radiation efficiency is more than 100%. Could anyone kindly check out my attached simulation file, and please tell me what is wrong.
Did you check the gain and radiation efficiency of my antenna? The gain is far more than the normal 2.15dB of slot antenna. And the radiation efficiency more than 1. That is my problem.