Question 1

Which transmission-line types are supported?

Accepted Answer

Microstrip, embedded/buried microstrip, symmetric stripline, asymmetric (offset) stripline, grounded coplanar waveguide (CPWG), coplanar waveguide without ground, and edge-coupled and broadside-coupled differential pairs.

Question 2

What models does it use?

Accepted Answer

Hammerstad-Jensen for microstrip with Kirschning-Jansen frequency dispersion, the exact Cohn conformal-mapping result for stripline, Ghione/Simons elliptic-integral formulas for CPW/CPWG, and Wadell/Hammerstad-Jensen coupled-line models for differential pairs. Each model is validated against published reference values.

Question 3

Does it calculate loss?

Accepted Answer

Yes. It reports conductor loss (with skin effect and surface-roughness correction) and dielectric loss in dB/m and over the trace length, plus phase velocity, guide wavelength and propagation delay.

Question 4

Are my inputs sent to a server?

Accepted Answer

No. All computation runs locally in your browser via WebAssembly. Nothing is uploaded.

PCB Impedance Calculator — microstrip, stripline, CPWG and differential pairs