Microwave Bandpass Filter Can You Give Any Reference To Solve The Problem In Designing Combline Bandpass Filter Using Microwave Office?

Can you give any reference to solve the problem in designing combline bandpass filter using Microwave Office? - microwave bandpass filter

For the bandpass filter Comblin basis, I use to determine a schematic diagram of the microwave with the desktop software on the graph of insertion loss and return loss, but the result of n 'is not required .. On the other hand, must also distinguish between the base of the filter bandpass to the tunable bandpass rather Comblin .. Filter Comblin but the result is an error has occurred when the active device uses capacitance diode is appropriate (as I understand) ...