hi...my name is Tia and I was in my final year and i having the difficulties in building microstrip hairpin filter for Ultra wide-band application. i was at loss on how to obtain the filter dimension and spacing. at first, i had already followed the pozar and other several books and successfully obtain the lumped circuit for the filter, its odd and even impedance. but when i trying to find its dimension and spacing, the book recommend me to use quasi static graph but what disappointing me is the graph provided were only for dielectric 10.0 while i need to use 2.2 rogers. i tried to build it but failed. could you please help me by recommend any procedure or graph that can be use? for now, my university only provide CST software.