MEGTRON 6 Dk and Df
Panasonic MEGTRON 6: Dk 3.61 and Df 0.004 at 10 GHz (E-glass cores 3313/2116, 2.5.5.5). In the pcbplanner material library it is listed under very low loss materials, with a glass transition temperature of 185 °C.
Datasheet values
| Entry | Dk | Df | at | Tg | Construction and test method |
|---|---|---|---|---|---|
| MEGTRON 6 (R-5775), RC 54 % | 3.61 | 0.004 | 10 GHz | 185 °C | E-glass cores 3313/2116, 2.5.5.5. |
| MEGTRON 6 (R-5775N), low-Dk glass | 3.34 | 0.0037 | 13 GHz | 185 °C | 0.75 mm, BCDR. |
Dk and Df depend on the glass style, the resin content and the test method, so the same product has different values in different constructions. Compare materials at the same frequency and, where possible, with the same method; for a construction not listed here, use the manufacturer’s construction table.
Dk and Df from 1 to 20 GHz
The datasheet gives one frequency. The table extends that point with the Djordjevic–Sarkar wideband Debye model, the same model the impedance and trace-loss calculators use: it keeps Df nearly flat and lets Dk fall slowly with frequency. These are model values, not measurements.
| Entry | 1 GHz | 2 GHz | 5 GHz | 10 GHz | 20 GHz |
|---|---|---|---|---|---|
| MEGTRON 6 (R-5775), RC 54 % | 3.63 / 0.0041 | 3.63 / 0.0041 | 3.62 / 0.0041 | 3.61 / 0.0040 | 3.60 / 0.0038 |
| MEGTRON 6 (R-5775N), low-Dk glass | 3.36 / 0.0039 | 3.36 / 0.0039 | 3.35 / 0.0038 | 3.34 / 0.0037 | 3.34 / 0.0036 |
Each cell is Dk / Df.
Use it in a calculation
- Impedance and trace width on MEGTRON 6 (R-5775), RC 54 % · insertion loss per inch
- Impedance and trace width on MEGTRON 6 (R-5775N), low-Dk glass · insertion loss per inch
Other datasheet pages: Panasonic MEGTRON 4 · Panasonic MEGTRON 7 · Rogers RO4350B · Rogers RO4003C · Rogers RO3003 · Rogers RT/duroid 5880 · Isola 370HR · Isola FR408HR · Isola I-Speed · Isola Tachyon 100G · TUC TU-872 SLK · Shengyi S1141 · Shengyi S1000-2M · Nan Ya NP-155FR · DuPont Pyralux AP · DuPont Pyralux HP · Taiyo PSR-4000 solder mask
Sources
- Panasonic MEGTRON 6 R-5775 data sheet (2021). Resin 54 % cores (3313/2116): Dk 3.61, Df 0.004 at 10 GHz (2.5.5.5); Tg 185 °C.
- Panasonic MEGTRON 6 R-5775(N) data sheet (2022). Low-Dk glass, 0.75 mm: Dk 3.34, Df 0.0037 at 13 GHz (BCDR); Tg 185 °C.