IndieRF Transmission Line Calculator
Coplanar waveguide without backside ground
Wadell elliptic-integral CPW on a finite-height substrate. Gap S sets both Z0 and the sidewall current that the finish stack sees.
IndieRF Transmission Line Calculator
PCB traces and chip-and-wire
Loss sweep · dB/in
Loss breakdown @ eval
- Base Cu18.1%
- Plating33.1%
- Roughness4.8%
- Dielectric32.9%
- Mask11.1%
Skin depth vs plating
99.8% of current in the plating shell, 0.2% in the copper core.
Foil Reverse treated (RTF): Rq = 1.2 um · Huray a = 0.7 um, As/Af = 1.4
Goldt=0.05 um · δ=0.79 um · 6.2%
σ = 4.10e7 S/m
Nickelt=4.50 um · δ=0.72 um · 93.7%
σ = 1.40e7 S/m · μr = 3.5
Copper coret=17.50 um · δ=0.66 um · 0.2%
σ = 5.80e7 S/m