I want help about passive filter

[Echo]

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

 

[hamdard]

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

 

[hlhe]

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

 

[hr_rezaee]

hi
use filter solutions.
regards

 

[Ave_Rapina]

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

 

[Echo]

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

 

[RedMage]

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

 

[Echo]

Thank you!

 

[RedMage]

Welcome