extracted pole filter synthesis tool

Hi,

I am trying to design a 7-order extracted pole filter (1 transmission zero on high side). Is there any good synthesis tool to get something e.g coupling matrix?

Thanks.

Lee

I have just coded a matlab program to generate the coupling matrix based on Amari's paper very recently. The program is not on the current laptop. I will post it next week.
Currently, this program can generate the coupling matrix once the pass band and transmission zeros are specified.

Based on the coupling matrix, I can further map it to a bandpass equivalent circuit. However, I still have some problems to find a direct relation between the calculated NRN and a physical implementation, e.g. waveguide T-junction.

TY