design birdcage in hfss

How could I setup the quadrature feed excitation
in HFSS 9?

Could somebody help?
Thanks in advance.

hi
I needed a coupler in order to have quadrature feeding for birdcage mri coil. then I designed a coupler and it worked good.
my design was consist of microstrips, another way is lumped elements.
At which freq. will you feed?