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Comparison study.
| Ref | S Hz.s.m–1 | Q-factor | FoM s.m–1 | Structure |
|---|---|---|---|---|
| 2022, Ref.27 | 2.55 | 4077 | 9.16 | Regular tubes with different cross-sections |
| 2023, Ref.44 | 1.58 | 6790 | 33.7 | Ternary-symmetric periodic tubes |
| 2023, Ref.45 | 5.8 | 5000 | 140 | Branched open resonators |
| 2024, Ref.46 | 4.1 | 113,962 | 332 | Closed parallel resonators |
| This study | 5.3 | 3,470,288 | 10,254 | Open and closed parallel resonators |
