You mention coupling capacitor and decoupling capacitor.
Can you understand things correctly ?
Show us terminated impedance value.
You still use coupling and decoupling capacitor.
Again can you understand things correctly ?
Not exactly clear what you mean with "decoupling cap". You have it described as low-pass in post #5. But it's conflicting with expected impedance matching for SCLF-700.
Why do you think it should be used?
Settings in Layer Stack Manager are only relevant for documentation purposes and possibly impedance calculations. It's an optional add-on to the basic PCB design.
You see the default settings of Altium designer, need to change the substrate thickness respectively for overall 0.8mm thickness, e.g. 29mil.
Your capacitors in figure are not "Decoupling Capacitor".hi adding a decoupling cap at input and output of the LPF IC is not right?
I apologize for using the synonymous substrate for dielectric...
Seriously, isn't the answer obvious when looking at the Altium stackup display?
Your capacitors in figure are not "Decoupling Capacitor".
https://www.edaboard.com/attachment.php?attachmentid=139440&d=1497634105
They are "Shunt Capacitor".
"Shunt" or "Series" specify inserting topology of capacitor.
"Decoupling" mean a purpose or role of capacitor.
Your shunt capacitor's role is not "decoupling".
https://www.edaboard.com/showthread.php?t=368768
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