Micro-strip bandpass filter

I am designing a micro-strip bandpass filter using parallel coupled lines. I have problem in obtaining width and spacings of coupled lines from even and odd mode characteristic impedances. Can anyone please help me out .

What problem? Do you have a basic idea how to proceed?
Have you looked at transmission line calculators which calculate Z0e/Z0o from the physical dimensions?

Hello

there are plenty papers available from open source publications on bandpass filters.i have provided some links here for your reference

http://ijeei.org/docs-3904550494c2ac15da882f.pdf

http://www-ee.uta.edu/online/adavis/...UWB_filter.pdf

Regards
ChachitoEL

You could be interested in QUCS, a freeware RF simulator with an embedded line calculator tool

Qucs project: Quite Universal Circuit Simulator

Read Hong&Lancaster "Microstrip filters for RF/microwave applications" and all will become clear to you. It contains practical techniques also that can be used in conjunction with a simulator to optimize the coupling factors (spacings) and external Q-factor of the first resonator.

please proveide the eBook of Microstrip Filters for Rf/Microwave Applications by Microstrip Filters for Rf/Microwave Applications.