Low-Loss Reconfigurable Phase Shifter in Gap-Waveguide Technology for mm-Wave Applications Palomares Caballero, Ángel Alex Amor, Antonio Escobedo Araque, Pablo Valenzuela Valdes, Juan Francisco Padilla De La Torre, Pablo Phase shifter Gap-waveguide technology Lowloss Reconfigurable waveguide mm-waves This work was supported in part by the Spanish Research and Development National Program under Project TIN2016-75097P and Project RTI2018-102002-A-I00, in part by "Junta de Andalucia" under Project B-TIC-402-UGR18 and Project P18.RT.4830, and in part by the Predoctoral Grant FPU18/01965. In this brief, we present a low-loss mechanically reconfigurable phase shifter implemented in gap-waveguide technology for mm-wave frequencies. The proposed design gives a practical implementation of tuning elements inside the waveguide providing alternatives to the use of the E-plane split waveguide at high frequencies in order to avoid leakage losses. The depicted phase shifter design is based on a H-plane split waveguide. The phase shift is controlled by means of a tuning screw, which exerts pressure on a flexible metallic strip inserted inside the waveguide. The flexible strip bends with different curvature radii and determines the phase shift at the output port. Cost-effective manufacturing and simple implementation of the flexible metallic strip are achieved by means of the gap-waveguide design. A prototype has been manufactured for validation purposes. Good impedance matching is achieved from 64 GHz to 75 GHz providing a 15.8% impedance bandwidth. The results show a maximum phase shift of 250° with a maximum and mean insertion loss (IL) of 3 dB and 1.7 dB, respectively. 2021-02-10T12:50:46Z 2021-02-10T12:50:46Z 2020-06-04 info:eu-repo/semantics/article Publisher version: Á. Palomares-Caballero, A. Alex-Amor, P. Escobedo, J. Valenzuela-Valdés and P. Padilla, "Low-Loss Reconfigurable Phase Shifter in Gap-Waveguide Technology for mm-Wave Applications," in IEEE Transactions on Circuits and Systems II: Express Briefs, vol. 67, no. 12, pp. 3058-3062, Dec. 2020, [doi: 10.1109/TCSII.2020.3000058] http://hdl.handle.net/10481/66450 10.1109/TCSII.2020.3000058 eng http://creativecommons.org/licenses/by-nc-nd/3.0/es/ info:eu-repo/semantics/openAccess Atribución-NoComercial-SinDerivadas 3.0 España IEEE