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Hi everyone
The equation below shows how to obtain unloaded quality factor using group delay(f0 is resonant frequency. IL is insertion loss at f0. td is group delay). But I do not know how this equation is obtained. Can anyone give me some clues? Thanks.
Qu = pi*f0*td*( 10^(IL/20) )/( 10^(IL/20)...
I have read a paper titled "Narrow-Band Microwave Filter Design", which is written by Daniel G. Swanson(This paper can be download from the website of Microwave Magazine). I am really confused about the approach in that paper by which the unloaded quality factor(Qu) is obtained. To calculate Qu...
It is known that the quality factor of the circuit below is 1/(wCR).
But does anyone konw how to abtain quality factor for T type network shown below? Any help is appreciated. Thanks!
Hi guys:
Mesh generation has failed when I simulated a MEMS switch using HFSS11. Below is the picture of my model. I thought it is the problem of the hight of the dielectric layer(0.1um), since the problem is solved when I increase the hight value to 0.2um.
Also, there are three error...
Re: Problems in extracting coupling coefficient (or Qe) curv
Hi PeterMartin:
Thank you for your suggestion. I do think it is a more effective way to use circuit simulators at first. But maybe you misunderstood what I mean. I just doubted the validity of my steps to extract coupling coefficient...
Lately, I was told that the extracted coupling coefficient and Qe using this approach would not be accurate. But no one around me kowns why! Is it the problem of HFSS?
I am designing a five-orders mirostrip combline filter on a 1.27mm thick substrate with a relative dielectric constant of 10.8. I let the microstrip resonators be lambda/4 long and require no capacitive loading for this filter design. There is a metal vias to ground at the end of each resonator...
Is it ture that we can always find a π or T type circuit equivalent to every two-port passive network? If not, in what kind of situation, this argument can be right? Thanks for help.
I have same question as well. What is the difference between these two approaches, "use Ansoft Designer to co-simulate with HFSS" and "use Agilent ADS to import the S-parameters generated by HFSS for co-simulation"? Which one is more accurate?
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