Self resonance in low pass filter simulation in ADS

[nikhil_56]

Hello,

I am simulating low pass filter in ADS, i can able to achieve good attenuation in stop band but doubt my is there are some peaks while transitioning(steeper graph) from pass band to stop band, i guess these peaks are self resonance how can i reduce this peaks in ADS?

 

[FvM]

Which filter prototype are you trying to implement? Can you show intended and actual transfer function?

 

[nikhil_56]

Which filter prototype are you trying to implement? Can you show intended and actual transfer function?

It's Chebyshev low pass filter using stepped impedance method i am designing.

 

[BradtheRad]

Chebyshev filters exhibit several odd peaks and troughs. Articles speak of polynomials associated with this type. Since the math it's derived from is more complicated, I guess the resulting graph has a distinctive pattern of peaks and troughs.