Designing an Interdigital Filter

Hi everyone, I am recently starting a project on making a 2.4GHz Bandpass filter on microstrip. There are serveral methods for doing this, hairpin, interdigital or combined filter. Interdigial filter seems more interesting. So I am wondering if anyone can share your idea on designning the interdigital filter or any website or files that is helpful to read link to this topic. it will be great if there are some practical report link to this topic. Thank you