Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

How to calculate roll off rate of a bandpass filter?

Status
Not open for further replies.

cettvm17mne

Newbie level 3
Joined
Oct 9, 2017
Messages
4
Helped
0
Reputation
0
Reaction score
0
Trophy points
1
Activity points
28
Hi,
I am doing a project on bandpass filter using HFSS. How can I calculate the roll off rate in db/decade and db/octave from S21 plot? Please help
 

Neighboring resistances (input & output resistances) play a part in shaping the rolloff curve. Although naturally the obvious factors are LC values and L:C ratio. There are various ways to arrange a bandpass filter. Therefore it becomes difficult to calculate how effects interact to influence behavior.

I have not seen a simple formula for predicting performance. I've found I learn a lot by watching a variety of simulations, applying a sine sweep. A reasonable range of frequencies is from 1/10 to 10x the center frequency. That is likely to reveal the rolloff curve, how sharp it is or how gradual it is.
 
Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top