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hi dear friend.
I've added an IEEE paper here. It gives you the idea of how to find a coupling matrix for given S parameter matrix.
I think , by using optimization methods , we can extract the coupling matrix from scattering matrix.
I'm trying to write a MATLAB code for extracting coupling...
Re: Problems in extracting coupling coefficient (or Qe) curv
Hi dear friend ,
I'm trying to simulate coupling between two combline resonators.
but I dont know how to do this by using HFSS10 and extract coupling diagrams via eigen mode solver of HFSS.
can u help me please?
regards
phase frequency comparator
as a simple example :
If u have two exactly similar signals an XOR them , then the output would be zero.
u can use and extend this idea to make freq comparators.
Re: PLL Jitter
hi.
the output phase noise of a PLL is related to input phase noise by this relation:
No=20log(N)+Ni
If u use higher PFDs ,then N=fo/PFD would be decreased and then output phase noise and so output time jitter would be decreased.
yes .
If the input of a pll is for example f1 then the output would be fo=N*f1.
but if the sinusoidal is in the input of a VCO the output would be FM modulated signal which u can find the Bandwidth by Carson's rule.
hello dear friends.
I've designed a bandpass filter in 140 MHz and 20MHz bandwidth. I've casscaded two 3th order eliptic filter for this purpose.
the resulting insertion loss is about 3 dB in simulation , but Its about 12 dB practically.
it's return loss is very bad in pass band (4~6 dB) and...
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