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

<div>Equivalent LC circuit model of the designed filter.</div>

International Journal of Antennas and Propagation

Figure 4: Compact Quadband Bandstop Filter Based on Concentric Split Ring Resonators with Perturbation for Multifunctional Wireless Systems 