Calculate microstrip impedance Z₀, trace width W, and quarter-wave lengths for Rogers RO4350B substrate (εr=3.66, halogen-free). Interactive calculator with design tables.
Interactive Calculator – RO4350B
Microstrip Z₀ Calculator (Rogers RO4350B)
Characteristic Impedance Z₀
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Effective Permittivity εe
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Guided Wavelength λg
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Quarter-wave length λ/4
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50 Ω Trace Width Reference for RO4350B
H (mm)
W for 50 Ω
εe
λ/4 at 5 GHz
λ/4 at 24 GHz
0.254 (10 mil)
0.56 mm
2.88
8.83 mm
1.84 mm
0.508 (20 mil)
1.13 mm
2.89
8.81 mm
1.84 mm
1.524 (60 mil)
3.38 mm
2.90
8.78 mm
1.83 mm
RO4350B vs RO4003C Comparison
Property
RO4350B
RO4003C
εr
3.66
3.55
tan δ at 10 GHz
0.0037
0.0027
Halogen-free
Yes
No
50 Ω W (H=0.508mm)
1.13 mm
1.10 mm
Loss at 10 GHz (100mm)
~2.0 dB
~1.5 dB
RF View Microstrip Calculator: Enter εr=3.66 for RO4350B to compute 50 Ω trace widths and wavelengths. Halogen-free choice for automotive and industrial RF designs. Offline in Utilities tab.