design of dual band filter

Hi everyone,
my project is "DESIGN OF DUAL BAND FILTER USING MICROSTRIP SHORT CIRCUIT TERMINATED HALF WAVELENGTH STEPPED IMPEDANCE RESONATOR"
I want all of u help me doin this project.... pls attach files regarding this..
also i am doing this project in ADS software. for the layout design i dont know how to draw hole for the k-inverter.
help me regarding this also....

have u done this dualband filter?

i dunno about dual Band pass filters but i have designed a BPF for the X band application using Hairpin filters,

i found that the BPF designed using the hairpin approach have dual pass bands , one at the designed frequency and other at the harmonics of the passband.

Hope this helps