Compact Quadband Bandstop Filter Based on Concentric Split Ring Resonators with Perturbation for Multifunctional Wireless Systems

<div>Retrieved real effective permittivity and permeability of the DSCSSRs.</div>

International Journal of Antennas and Propagation

Figure 7: Compact Quadband Bandstop Filter Based on Concentric Split Ring Resonators with Perturbation for Multifunctional Wireless Systems 