I want help about passive filter

Who use serenade software to design filter?
The question is very difficult to me,so I want to help.
Thank you!
:D

please, explain the problem. I did not get the words.

ADS can synthesize passive filter of lumped components or microstrip. what you need to do is just defining the specification of your filter.

hi
use filter solutions.
regards

Use filter solutions
You have lost of configurations for filter Bessel Cherbychev etc

Thank you!
I want to design cavity filter,but I don't know the relation between the J impedance inverters and coupler cofficient k.

Hi,

coupling coefficient Mi,i+1 = Ji,i+1 / √(bi * bi+1). b are the susceptence slope of the resonator. b = dB/dω. U may need a better understanding of resonator and its impedence at resonance to better understand the susceptence slope.

Actually u can get all the J values and M values from the lowpass prototype g values. However, J will need susceptence slope b. Some of them can be calculated easily, others are tough. If you wanna go by coupling coefficient and external Q factors, u don't need J at all. U can refer to Lancaster's book, Microstrip filters for RF/Microwave engineering chapter 5. There are detailed explanation.

regards

Thank you!

Welcome