PCB Impedance and Capacitance of Asymmetric Stripline

calculate the pcb impedabce and capacitance of asymmetric stripline

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Asymmetric Stripline
W[m] width of the trace
H[m] height of trace above return plane
H1[m] height of trace above return plane
T[m] trace thickness
Er[ ] relative permittivity of the dielectric
Are there distributed capacitive loads on this trace?
La[m] average length of the traces attaching the loads
Ca[pF] average load capacitance
Z0[Ohm] characteristic impedance
C0[F/m] capacitance per unit length
tpd[s/m] propagation delay
L0[H/m] inductance per unit length
Zc[Ohm] effective characteristic impedance
t'pd[s/m] effective propagation delay

NOTE: numbers are in scientific notation (e.g.: 1.427e-9 s/m = 1.1427·10-9 s/m = 1.427 ns/m)

CONDITIONS: (0.1 < W/H < 2.0); ( T/H < 0.25);



Capacitive Load Modify:

Formulas for: Capacitive Load Modify
See also notes on PCB Impedance and Capacitance Calculator page.


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