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| MUT | Reference Permittivity | Estimate error percentage (%) of Measured Permittivity using | |||||
|---|---|---|---|---|---|---|---|
| normal SSRR [21] | SSRR with single spurline | SSRR with double spurlines | |||||
| εr | % εr | εr | % εr | εr | % εr | ||
| Air | 1 | 0.94 | 6.00 | 0.95 | 5.00 | 0.96 | 4.00 |
| Roger RT 5880 | 2.2 | 2.12 | 3.63 | 2.32 | 5.45 | 2.23 | 1.37 |
| Roger RT 4350 | 3.48 | 3.5 | 0.57 | 3.38 | 2.87 | 3.45 | 0.87 |
| FR4 | 4.4 | 4.45 | 1.13 | 4.42 | 0.45 | 4.41 | 0.23 |
