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