Indüktif ve kapasitif rezonetörlerin birleşiminden oluşan elektromanyetik bantaralikli metamateryaller

In this study, first, a novel MTM, which exhibits a wideband double negative behavior in X-band and is comprised of a modified S-shaped split-ring resonators (S-SRR), is proposed, designed and investigated both numerically and experimentally. This MTM has been used in an MTM absorber (MA) application. The proposed MA provides a stable frequency response for θ<40°. Maximum absorption rate is 99.99% at 8.912 GHz with absorption over 90% in 8.825-9.0 GHz. A fishnet-mushroom-like MTM is the next MTM studied. The electromagnetic behaviour of this structure is provided in terms of S-parameters numerically and experimentally for X-band frequency regime. The proposed design provides an electromagnetic bandgap (EBG) characterization with desired characteristic parameters; i.e. a double negative left-handed region in X-band with negative permittivity and negative permeability. This EBG is utilized to reduce the mutual coupling between arrays of antennas. The simulation results prove that the isolation has been improved while the radiated fields of the antennas are not affected by the EBG structure.