Dear Hayder S. Ahmed

Do pardon me as i m unable to get what exactly you are asking. Have you already designed the microstrip in simulation software and now you wanted to change the substrate or anything else??

With Regards 

Dhanu Chettri

Dear Hayder,

If there are a closed form equations that you used to design your resonator then you can easily insert the new er and any other parameters. If not you can calculate your primary physical dimensions in term of electrical lengths based on λg then use the new er to calculate the new λg and extract the new physical lengths. A non smart way is to use Em simulator to scale your dimensions with new er ,h

regard,

Hussam 

Try simulating your intended device (geometry and materials) and optimize for your specific application by varying the parameters.

Hi,

Thank you very much for the interest (Dhanu Chettri, Zeshan Ali , Hussam Alsaedi, and Richard J Williams ).

Dear and my teacher Hussam, yesterday came to me the same idea and implement it and I got good results, today I foud you wrote the same idea, this is exchange thoughts or what?

With my best regards.