hi dear.your antenna is broadband? in frequency band from 6-8, it is broadside but in the others i cant see.can i know your analysis about the mode 2 to 5? how does you explain the behavior?
HI anvesh, Hope the below plot helps you to understand the first mode. The first mode is Quasi-TEM mode. Depending on the size of the wave port different modes will be excited. In order to understand mode number u can view the field modes in port option.