| Method of calculation | Zreal | Zimag. |
| Zeland software simulation | 309.41 Ω | −9.92 Ω |
| Quasi-static method | 463 Ω | −9.69 Ω |
| Biconical approximation method | 489 Ω | −10.5 Ω |
| Tapered transmission line method | 362 Ω | −15 Ω |