hfss v12 Balanced Filter simulation

hi forks,
does anybody know how to simulate balanced filter using HFSS 12, i.e. how to excite the even mode and the odd mode? Thanks in advances.

i will be happy to help you simulate if you can be more specific. But i don't know how you can only excite the odd or even mode in HFSS. It might not be possible.

thanks. but the balance BPF would not wok if the odd mode can not be excited.