Pérez Quintana, DayanTorres García, Alicia E.Ederra Urzainqui, ÍñigoBeruete Díaz, Miguel2021-03-182021-07-082020D. Pérez-Quintana, A. Torres-García, I. Ederra and M. Beruete, 'A Gap Waveguide Fed Circular Polarization Antennas in the Millimeter Wave Range,' 2020 14th European Conference on Antennas and Propagation (EuCAP), Copenhagen, Denmark, 2020, pp. 1-3, doi: 10.23919/EuCAP48036.2020.9135308.978-88-31299-00-810.23919/EuCAP48036.2020.9135308https://academica-e.unavarra.es/handle/2454/39423In this work, a novel circular polarization (CP) antennas in ridge gap waveguide (RGW) working in the V-band of the millimeter-wave spectrum is presented. CP is generated in a simple and effective way by means of two orthogonal feeder arms that excite a CP in a rotated square-shaped slot placed on top metallic lid. Parametric simulation studies demonstrate that a difference between both arms length of approximately λ/4 leads to high-purity CP within a relatively broad bandwidth. A square-shaped slot antenna is manufactured and experimentally analyzed. A broadband matching with a reflection coefficient magnitude below -10 dB (S11 <; -10 dB) is achieved from 60.5 to 69.3 GHz. Applying the axial ratio criterion (AR <; 3 dB) the bandwidth in CP is 10.74%, with respect to the central frequency. The maximum gain at broadside is 5.49 dB at 66.8 GHz.3 p.application/pdfeng© 2020 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other work.AntennasGap waveguideCircular polarizationBroadbandinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/openAccess