Basic HFSS quesion .. But very Urgent .. Plz Help !!

Hello all..

I hope you can help me to solve this problem

How can i get a four port directional coupler ? and how can I simulate its coupling co-effecient with its length variable ..

Please notice that it is the first time for me to open ( not only use ! ) the HFSS but i strongly need to learn it as fast as possible !

Please help me in both ways , the Directional coupler problem ( and it will also be good example ) and help also me to learn ..

Thank you very much ..

go to Ansoft Site lots of examples are there..u can also see emtalk.com they have demos of some problems