Title :
All-metallic ε-near-zero (ENZ) lens based on ultra-narrow hollow rectangular waveguides: Experimental results
Author :
Orazbayev, B. ; Torres, V. ; Pacheco-Pena, V. ; Rodriguez, P. ; Teniente, J. ; Beruete, M. ; Sorolla, M. ; Navarro-Cia, M. ; Engheta, N.
Author_Institution :
Dept. of Electrical and Electronic Engineering, TERALAB, Antennas Group, Univ. Publica de Navarra, Pamplona, Spain
Abstract :
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.
Keywords :
lenses; optical focusing; rectangular waveguides; ENZ lens; all-metallic ε-near-zero lens; array stacking; focusing properties; plano-concave lens; radiation properties; ultra-narrow hollow rectangular waveguides; Brain modeling; Frequency measurement; Hollow waveguides; Lenses; Metamaterials; Optical waveguides; Permittivity; ENZ media; metamaterial lenses; millimeter waves;
Conference_Titel :
Microwave Symposium (MMS), 2014 14th Mediterranean
Print_ISBN :
978-1-4799-7390-3
DOI :
10.1109/MMS.2014.7088925
