Research Article
Compact Quadband Bandstop Filter Based on Concentric Split Ring Resonators with Perturbation for Multifunctional Wireless Systems
Table 2
Extracted real permittivity and permeability values.
| Frequency range | Real permittivity | Real permeability |
| 0.5–0.59 GHz | Negative | Positive | 0.59–0.9 GHz | Positive | Positive | 0.9–1.85 GHz | Negative | Positive | 1.85–2 GHz | Negative | Negative | 2–3.12 GHz | Positive | Negative | 3.12–3.76 GHz | Negative | Negative | 3.76–3.86 GHz | Negative | Negative | 3.86–4.13 GHz | Negative | Positive | 4.13–4.38 GHz | Negative | Positive | 4.38–4.81 GHz | Positive | Positive | 4.81–5.10 GHz | Negative | Positive | 5.10–5.27 GHz | Positive | Positive | 5.27–5.61 GHz | Negative | Positive | 5.61–5.67 GHz | Positive | Positive | 5.67–6.08 GHz | Negative | Negative | 6.08–7.24 GHz | Positive | Negative | 7.24–7.5 GHz | Negative | Negative |
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