TheMaksimys
Newbie
Hi everyone!
My goal is to design the cavity bandstop filter with the 50 dB rejection at the 6.7-6.8 GHz. I found an attactive topology in the "Microwave filters for communication systems" book (figure attached). The coupling matrix for this topology can be estimated using various available CAD tools. Yet I have not found any papers where the physical implementation of such a filter was reported.
I have used Filter Designer 3D along with the CST Studio to compute the coupling matrix and construct the cavities with the desired couplings and quality factors. The simulation of the filter assembly, however, had demonstrated very poor perfromance and the S-parameter matrix decomposition signalized that the generated structure is severely detuned and it has numerous parasitic couplings ( which prevents layout optimization).
My question is whether the demonstrated topology is practically feasible? Also If someone could suggest the better method/topology for the cavity bandstop filter with the high rejection, that would be excellent!
Thank you for your help!
My goal is to design the cavity bandstop filter with the 50 dB rejection at the 6.7-6.8 GHz. I found an attactive topology in the "Microwave filters for communication systems" book (figure attached). The coupling matrix for this topology can be estimated using various available CAD tools. Yet I have not found any papers where the physical implementation of such a filter was reported.
I have used Filter Designer 3D along with the CST Studio to compute the coupling matrix and construct the cavities with the desired couplings and quality factors. The simulation of the filter assembly, however, had demonstrated very poor perfromance and the S-parameter matrix decomposition signalized that the generated structure is severely detuned and it has numerous parasitic couplings ( which prevents layout optimization).
My question is whether the demonstrated topology is practically feasible? Also If someone could suggest the better method/topology for the cavity bandstop filter with the high rejection, that would be excellent!
Thank you for your help!