Cengiz, Mehmet FarukNakmouche, Mohammed FaroukFawzy, Diaa E.Allam, A. M. M. A.Akarsu, GokberkTaher, Hany2023-06-162023-06-162022978-1-6654-6754-4https://doi.org/10.1109/ICEEE55327.2022.9772573https://hdl.handle.net/20.500.14365/19449th International Conference on Electrical and Electronics Engineering (ICEEE) -- MAR 29-31, 2022 -- Alanya, TURKEYIn this paper, a triple-band inverted microstrip Ridge Gap Waveguide (RGW) filter is designed using a double octagonal ring resonator (RR) with corner cuts. The design parameters are optimized using the Finite Difference Time Domain (FDTD) method (CST studio simulator). The filter is implemented on Rogers RT5880 (epsilon(r) =2.2, thickness of 0.787 mm and loss tangent tan delta = 0.0009). It is selected because of its low losses at high frequencies. The proposed design operates within the Ka frequency band (27-40 GHz), with resonance frequencies of 32.32 GHz, 35.75 GHz, and 38.12 GHz. The return losses reach levels of about -35 dB, -25 dB, and -32 dB for the three bands, respectively. The filter exhibits a low insertion losses of about 0.6 dB, 1.1 dB, and 0.9 dB at the three resonant frequencies, respectively.eninfo:eu-repo/semantics/closedAccessmillimeter-waveridge gap waveguideinverted microstripfilterring resonatorbandpassAntennaConference Object10.1109/ICEEE55327.2022.97725732-s2.0-85130889231