Hi aabid
If you wish to have a single output at the circulator port..u may have to use a filter in your design to further reduce the power of the undesired outputs from the circulator..Or else if the output of the circulator shows the power level of the signal you desire quite high compared to the other output signals then you can avoid the use of the filter.You can simply treat the low power signals as noise as long as they don’t affect your system performance to a huge extent.
Regards