Gorur, Ali KursadKarpuz, CeyhunGorur, Adnan2024-11-072024-11-072017978-150906360-40149-645Xhttps://doi.org/10.1109/MWSYM.2017.8058735https://hdl.handle.net/11480/109882017 IEEE MTT-S International Microwave Symposium, IMS 2017 -- 4 June 2017 through 9 June 2017 -- Honololu -- 131000In this paper, design of a tunable dual-mode dualband microstrip bandpass filter is presented. The designed filter is constructed by using two nested dual-mode resonators (DMRs) having two patch capacitances located at the lateral arms of the resonators as reference elements. Varactor diodes are used instead of perturbation elements in order to excite the degenerate modes. Linear phase and quasi elliptical filtering characteristics can be independently obtained in each passband and the band-widths can also be tuned at both filtering characteristics. For the experimental verification of the designed structure, a dual-mode dual-band microstrip bandpass filter was fabricated and measured. Center frequencies of the passbands were adjusted to 1.78-2.65 GHz and 1.83-2.7 GHz for linear phase and quasi elliptical filtering characteristics, respectively. Insertion losses in each passband were observed as better than 3 dB in measurements. © 2017 IEEE.eninfo:eu-repo/semantics/closedAccessBandpass filterDual-bandDual-modeReconfigurable filtering characteristicsTunable bandwidthVaractorConference Object92292510.1109/MWSYM.2017.80587352-s2.0-85032464940N/A