Q-Factor and Resonator
For my project I have to simulate the behaviour of a resonator (used as a filter RLC circuit), and to do that I have to vary the value of the unloaded Q to plot the response using MWO.
Can someone give me some tips to do that?
Thanks a lot for your help.
I would make a simple lumped element resonator as follows:
At port 1, a series coupling capacitor Cc.
In the middle three elements in parallel to ground, L,C,R
From the middle to port 2, another coupling capacitor Cc.
The circuit will resonate at approximately the frequency f0=1/(2Π√LC). Why not exactly that frequency?
Plot the insertion loss around the resonant frequency as you vary R (in otherwords as you vary the Q of the resonator). Start with R=2000 ohms, and work your way down. The effective Q of the resonator can be calculated from the (3dB bandwidth in [hz])/f0 read off of the plots.
For fun, vary Cc to see what different couplings do. Also for extra points, plot the input S11 on a polar chart and see what it is doing.
Hi, thx a lot for your help.
In fact, this is exatly what I have to do but you know I'm a complete beginner in MWO so can please give me more details about the plotting of the insertion loss and the values of the components I can use.
Thx again for your help.