Help in design of dual band power divider in HFSS

Hi
I have designed a dual band power divider in HFSS operating at 0.8gHz and 2.0GHz. But if i wish to have the divider work at other two frequencies, can adding a certain element change the behavior to suit the two frequencies.

Clarification: does current design work as dual band at 0.8 and 2GHz and you are trying to change to two different frequency bands still as a dual band? Or is your current design single band and you are trying to make it work dual band? Or does it currently work dual band and you are trying to get quad band?

Divider is working as dual band at 0.8and 2 GHz. i now wish to make it work at 1.8 and 2. GHZ as dual band itself.