Edge coupled band pass filter design

I have recently started using ADS2003, and as a part of my work have been asked to design a edge coupled bandpass filter for following specifications:
pass band : 11.1 to 11.4
insertion loss 0.5 db
stop band : appx 3.4 db away from 11.4

while designing the filter the physical parameters for lamda by 4 were
w= 1.358
l= 2.359
i used m_sub and mc_fil.
Though my design is not proper i need directions for how to, what to do in the design.where to refer et al.