Stripline Zd

Stripline Zd Calculator

stripline zdiff impedance diagram


Trace Thickness
Substrate Height
Trace Width
Trace Spacing
Substrate Dielectric

Output ⊕

Impedance (Zd): 
84.7 Ω
Impedance (Zo): 
49.9 Ω
Capacitance (C): 
1.40 pF/cm
Propagation delay (Tpd): 
69.9 ps/cm
Inductance (L): 
3.49 nH/cm

View Notes

Calculation Notes

A differential symmetric stripline is constructed of two traces placed equidistantly between two plane layers, separated by a dieletric.

Factors that influence the impedance calculation include:-

  • Trace thickness (t)
  • Substrate height (h)
  • Trace width (w)
  • Trace spacing (s)
  • Substrate dielectric (εr)

Z_{o}\approx \frac{60}{\sqrt{\varepsilon_{r}}}\times\ln\left(\frac{1.9\times(2h+t)}{(0.8w+t)}\right)

Z_{d}\approx 2\times Z_{o}\times\bigg[1-0.347\,exp\Big(-2.9\frac{s}{2h+t}\Big)\bigg]

  • RF Design Guide Systems, Circuits and Equations (ISBN 0-89006-754-6)
  • High-Speed Digital Design (ISBN 0-13-395724-1)
  • Signal Integrity Issues and Printed Circuit Board Design (ISBN 0-13-335947-6)
  • IPC-2141 Controlled Impedance Circuit Boards and High Speed Logic Design

Disclaimer: The information and this tool are provided with no liability of any kind whatsoever, use at your own risk.

About us| FAQs| Instant quote| Place order| Order history| Our details