Orazbayev, BakhtiyarTorres Landívar, VíctorPacheco-Peña, VíctorFalcone Lanas, FranciscoTeniente Vallinas, JorgeBeruete Díaz, MiguelSorolla Ayza, MarioNavarro Cía, MiguelEngheta, Nader2017-08-042017-08-042014B. Orazbayev et al., "All-metallic ε-near-zero (ENZ) lens based on ultra-narrow hollow rectangular waveguides: Experimental results," Proceedings of 2014 Mediterranean Microwave Symposium (MMS2014), Marrakech, 2014, pp. 1-4. doi: 10.1109/MMS.2014.7088925.2157-9822 (Print)2157-9830 (Electronic)10.1109/MMS.2014.7088925https://academica-e.unavarra.es/handle/2454/24941Trabajo presentado al 2014 Mediterranean Microwave Symposium. Marruecos, 2014.Here we perform numerical and experimental investigation of plano-concave all-metallic ε-near-zero (ENZ) lens with operational frequency f = 144 GHz. The ENZ lens is achieved by stacking an array of narrow hollow rectangular waveguides working near cut-off frequency. Focusing and radiation properties are numerically analyzed and measured. The enhancement of 5.61 dB and directivity of 17.6 dBi are shown. Good agreement between experimental and numerical results is demonstrated.4 p.application/pdfeng© 2014 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 works.Metamaterial lensesENZ mediaMillimeter wavesinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/openAccess