Hi all,
I would like to build a notch filter at 20MHz with a -6db bandwidth of about 200khz and a centre frequency depth of about 40db. I have tried with the conventional LC topology but the results is not good. Mainly due to the inductors' low Q.
I did came across some other topology such as crystal notch filter, waveguide & cavity filters. However, I do not have much knowledge about them and having trouble gathering information from websites. I would really appreciate it if anyone can help shed some light regarding this issue.
If I am to pursue with this project, which topology should I choose? Thanks!
I would like to build a notch filter at 20MHz with a -6db bandwidth of about 200khz and a centre frequency depth of about 40db. I have tried with the conventional LC topology but the results is not good. Mainly due to the inductors' low Q.
I did came across some other topology such as crystal notch filter, waveguide & cavity filters. However, I do not have much knowledge about them and having trouble gathering information from websites. I would really appreciate it if anyone can help shed some light regarding this issue.
If I am to pursue with this project, which topology should I choose? Thanks!