Resonator length for filter tuning in interdigital filter

hi to all
i have a doubt that, whether resonator length is the main factor for the filter tuning in interdigital filter, but it only depends on the frequency and wavelength , then by only tuning this length how can we adjust the all the factors related to filter?

thank you
i want o know more about this any suggested book for

s , any help will be more appriciate

thank you in advance

1. http://www.elektroda.pl/eboard/searc...+hfss+serenade

2. http://www.ansoft.com/hfworkshop04/

thank you, but i have those papers where the procedure for the good results on ansoft but i dont have that software. im asking about practical cases, where i have designe my own filter using equations.
anyway thank you for posting that information here i will once go through that papers once again hope that get some information!