Akarsu, GokberkBuse Zengin E.Nakmouche M.F.Cengiz, Mehmet FarukFawzy, Diaa E.Allam A.M.M.A.Taher H.2023-06-162023-06-1620229.78E+12https://doi.org/10.1109/ICEEE55327.2022.9772533https://hdl.handle.net/20.500.14365/35429th International Conference on Electrical and Electronics Engineering, ICEEE 2022 -- 29 March 2022 through 31 March 2022 -- 179335This study presents the development of a one-layer symmetrical Metamaterial Absorber (MMA) for millimeter-wave (mm-wave) applications. The target is to enhance the narrow band behavior and to achieve ultra-wideband with high absorptivity rates. The design is based on octagonal shaped cut rings and octagonal patches printed on grounded rigid substrate. A novel unit cell is developed and enhanced with the use of lumped elements technique to obtain ultra-wideband absorbers with high absorptivity rates. It is implemented on Rogers RT5880 with dielectric relative permittivity ? r=2.2, dielectric loss tangent of tan ?=0.0009, thermal conductivity of 0.2 W/m. K and with a 1.575 mm thickness. The characteristics of the MMA are examined in term of different resistive values, geometries, and angle of incidence. The obtained results show great enhancements in both the-10 dB bandwidth and in the absorptivity rates. The narrow bandwidth of the symmetrical design is enhanced by a factor of about 200 with average absorptivity of about 98% over the whole bandwidth. The current design is a very suitable for applications in the mm-wave. © 2022 IEEE.eninfo:eu-repo/semantics/closedAccessMetamaterial absorberMm-wave absorberWideband absorber5G mobile communication systemsBandwidthDielectric lossesMetamaterialsUltra-wideband (UWB)AbsorptivitiesMetamaterial absorbersMillimeter-wave applicationsMm wavesMm-wave absorberSymmetricsUltrawide bandWave absorbersWide-bandWideband absorberMillimeter wavesConference Object10.1109/ICEEE55327.2022.97725332-s2.0-85130889383