buenos
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4layer PCB Z0
I want to design a 4 layer pcb.
My question is, how should I calculate the characteristic impedance of the bottom layer microstrip lines? I have equations, but I am not shure, in the hight parameter.
------------------------------------top layer
------------------------------------gnd plane
------------------------------------power plane
------------------------------------bottom layer
For the hight parameter, which should I use? The distance between the bottom-gnd, or the bottom-power?
If I split the power plane, cross a line, is it bad?
I want to design a 4 layer pcb.
My question is, how should I calculate the characteristic impedance of the bottom layer microstrip lines? I have equations, but I am not shure, in the hight parameter.
------------------------------------top layer
------------------------------------gnd plane
------------------------------------power plane
------------------------------------bottom layer
For the hight parameter, which should I use? The distance between the bottom-gnd, or the bottom-power?
If I split the power plane, cross a line, is it bad?