Calculate microstrip Z₀, trace width W, and quarter-wave lengths for Rogers RT/Duroid 5880 (εr=2.20, tan δ=0.0009). Essential for 24–77 GHz mmWave PCB design.
Interactive Calculator – RT/Duroid 5880
Microstrip Z₀ Calculator (RT/Duroid 5880)
Characteristic Impedance Z₀
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Effective Permittivity εe
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Phase Velocity (× c)
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Guided Wavelength λg
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Quarter-wave length λ/4
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50 Ω Trace Widths for Duroid 5880
H (mm)
W for 50 Ω
εe
λ/4 at 28 GHz
λ/4 at 77 GHz
0.127 (5 mil)
0.38 mm
1.88
2.44 mm
0.89 mm
0.254 (10 mil)
0.76 mm
1.89
2.44 mm
0.88 mm
0.508 (20 mil)
1.52 mm
1.90
2.43 mm
0.88 mm
RF View mmWave Calculator: Enter εr=2.20 for RT/Duroid 5880 to compute 50 Ω trace widths and λ/4 lengths at 28/39/77 GHz. Offline in RF View Utilities tab — essential for 5G mmWave PCB design.