A Metamaterial Inspired UWB Circular Antenna as Superstrate for Gain and Directivity Improvement’s
Mourad Elhabchi1, Mohamed Nabil Srifi2, Raja Touahni3

1Mourad Elhabchi*, LASTID Laboratory, Department of physics, Faculty of Sciences, Ibn Tofail University ,Kenitra, Morocco.
2Mohamed Nabil Srifi, Electronics and Telecommunication Systems Research Group, National School of Applied Sciences (ENSA), Ibn Tofail University, kenitra, Morocco
3Raja Touahni, LASTID Laboratory, Department of Physics, Faculty of Sciences, Ibn Tofail University ,Kenitra, Morocco .

Manuscript received on September 16, 2019. | Revised Manuscript received on 24 September, 2019. | Manuscript published on October 10, 2019. | PP: 496-499 | Volume-8 Issue-12, October 2019. | Retrieval Number: L3387081219/2019©BEIESP | DOI: 10.35940/ijitee.L3387.1081219
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)

Abstract: IA 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 Technology Microwave Studio (CST) and Ansof High Frequency Structure Simulator (HFSS).
Keywords: Near Zero Index Metamaterial, Gain, Directivity, UWB Circular Antenna.
Scope of the Article: Micro Strip Antenna