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SERDES is not as sensitive to Common-Mode Noise due to differential topology. It's more critical in DDRx application because data is single-ended and there is a a lot of SSN. Albeit, it's never a bad thing to incorporate non-ideal Power and GND in your simulations, as it will be more accurate.
Best way to get propagation delay is unwrap the phase of S21 (Insertion Loss) and plot the flight time. Otherwise, it is Speed of light divided by the square root of the effective permitivity of the transmission line/material. Keep in mind effective Dk of vias can be 2-3 x slower than...
If you have ADS. Use ZIN function to derive impedance, then divide the imaginary component of the resultant impedance by 2*pi*f (frequency point of impedance).
I wonder why...Your assumption of absolutes and only considering single variables is misleading. I'm not attempting to pontificate with you, only augment the fact that oversimplifying complex topics is ambiguous.
Again, this is simply not true. It depends on numerous variables.
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Any common-mode signal above 1 MHz that encounters a return plane void will generate substantial XTALK in addition to poor Return Loss, irrespective of edge-rate (relatively speaking).
Edge-rate is more...
1.) If you're under 1 GHz, you may be able to get away with routing on VDDQ and VSS. Albeit, if you share VDDQ and VSS as reference planes for a stripline TL, the only path for the return-current is the through the VDDDQ-VSS (plane plane) impedance. This will generate ground bounce, since...
When you say "extremely high losses" can you elaborate on the magnitude of losses in dB at the frequency of interest? The majority of insertion loss occurs from conductor losses, not dielectric losses. Unless you're utilizing a very lossy material with poor Df. Also, it's very important to have...
Actually, wrt ESR and PDN/Z impedance you typically want more ESR to quench any modal peaks that exist in your frequency band. The R dampens/flattens the magnitude of the modal peak to bring down the PDN impedance at that frequency.
OP:
You really need to perform a PDN analysis in the...
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