Open AccessA Metamaterial Inspired UWB Circular Antenna as Superstrate for Gain and Directivity Improvement’s
Author(s) -
Mourad Elhabchi,
Mohamed Nabil Srifi,
Raja Touahni
Publication year - 2019
Publication title -
international journal of innovative technology and exploring engineering
Language(s) - English
Resource type - Journals
ISSN - 2278-3075
DOI - 10.35940/ijitee.l3387.1081219
Subject(s) - directivity , metamaterial , hfss , antenna gain , metamaterial antenna , antenna (radio) , optics , acoustics , materials science , impedance matching , microwave , antenna measurement , antenna factor , physics , electrical impedance , computer science , microstrip antenna , telecommunications , engineering , electrical engineering
A Near Zero refractive Index (NZIM) metamaterial inspired UWB circular antenna as a superstrate for gain and directivity improvement’s is presented and investigated in this work. The frequency range with S11 less than -10dB is from 4.5GHz to 12.5GHz. The permeability and permittivity of the (NZIM) has an extraordinary property that could be optimized to synchronously approach zero and have an effective wave impedance matching with air and near-zero index simultaneously, this feature of metamaterial gives the NZIM the ability to collimates the incident bending waves and gather it’s towards the normal direction. Hence the antenna performances in term of the gain and directivity will be enhanced. The studied metamaterial design is optimized and analyzed using CST microwave. Obviously, the antenna gain and directivity are enhanced by 4.8 and 4.89 respectively. The simulation of this developed metamaterial antenna has been optimized and performed by using Computer Simulation TechnologyMicrowave Studio (CST) and Ansof High Frequency Structure Simulator (HFSS)