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PCB Transmission Line Calculator
Calculate impedance and parameters for microstrip, stripline, and coplanar waveguide transmission lines.
Input Parameters
1 oz copper = 35 um, 2 oz = 70 um
Results
Enter parameters and click Calculate to see results
Substrate Database
| Material | Dielectric Constant (Er) | Loss Tangent | Description |
|---|---|---|---|
| FR-4 (Standard PCB) | 4.4 | 0.02 | Standard glass-reinforced epoxy laminate. Low cost, moderate performance. |
| FR-4 High-Tg | 4.3 | 0.018 | High glass transition FR-4 for better thermal stability. |
| Rogers RO4003C | 3.55 | 0.0027 | Ceramic-filled PTFE composite. Good RF performance, FR-4 compatible processing. |
| Rogers RO4350B | 3.48 | 0.0037 | Thermoset ceramic-filled hydrocarbon. Excellent for high-frequency applications. |
| Rogers RT/duroid 5880 | 2.2 | 0.0009 | PTFE composite with glass microfibers. Lowest loss, excellent for mmWave. |
| Rogers RT/duroid 6002 | 2.94 | 0.0012 | PTFE ceramic composite. Low loss, good dimensional stability. |
| Taconic TLY-5 | 2.2 | 0.0009 | Low-loss PTFE laminate. Similar to Duroid 5880. |
| Isola I-Tera MT40 | 3.45 | 0.0031 | Ultra-low loss laminate for high-speed digital. |
| Alumina (96%) | 9.8 | 0.0001 | Ceramic substrate. High εr, extremely low loss. For hybrid circuits. |
| Alumina (99.5%) | 10 | 0.0001 | High-purity ceramic. Best for precision RF circuits. |
| Air | 1 | 0 | Air dielectric (reference). |