Pérez Quintana, DayanEderra Urzainqui, ÍñigoBeruete Díaz, Miguel2022-02-102023-04-272021D. Pérez-Quintana, I. Ederra and M. Beruete, 'Compact Bull’s-Eye Antenna in Ridge Gap Waveguide with Circular Polarization at 60 GHz,' 2021 15th European Conference on Antennas and Propagation (EuCAP), 2021, pp. 1-5, doi: 10.23919/EuCAP51087.2021.9410954.978-88-31299-02-22164-334210.23919/EuCAP51087.2021.9410954https://academica-e.unavarra.es/handle/2454/42170In this work, a Bull's-Eye (BE) antenna with circular polarization (CP) based on ridge gap waveguide (RGW) technology, working in the millimeter-wave band (60 GHz) is numerically and experimentally demonstrated. The structure is coupled through a step transition to a ridge-line that ends in two orthogonal arms of different lengths to generate CP. The wave is coupled to the top plate by a central diamond slot surrounded by the BE structure, which consists of four concentric periodic corrugations around the slot. Simulations and experimental results are in good agreement, with practical bandwidth of 6.8% with respect to center frequency and peak gain of 18.4 dB. The antenna has right-handed CP (RHCP) with polarization discrimination of more than 30 dB.5 p.application/pdfeng© 2021 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.Bull's-eye (BE) antennaCircular polarization (CP)Ridge gap waveguide (RGW) technologyMillimeter wavesinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/openAccess