Design and fabrication of a new high gain multilayer negative refractive index metamaterial antenna for X‐band applications

2020 ◽  
Vol 30 (9) ◽  
Author(s):  
Omid Borazjani ◽  
Mohammad Naser‐Moghadasi ◽  
Jalil Rashed‐Mohassel ◽  
RamezadAli Sadeghzadeh
Keyword(s):  
Refractive Index ◽  
Negative Refractive Index ◽  
High Gain ◽  
X Band ◽  
Metamaterial Antenna

Analysis and Design of High Gain NRI Superstrate Based Antenna for RF Energy Harvesting System

2016 ◽  
Vol 2 (3) ◽  
pp. 647
Author(s):  
K.K.A. Devi ◽  
C. H. Ng
Keyword(s):  
Refractive Index ◽  
Negative Refractive Index ◽  
Effective Permittivity ◽  
Resonant Cavity ◽  
High Gain ◽  
Split Ring Resonator ◽  
Unit Cell ◽  
Impedance Match ◽  
Strip Line ◽  
Analysis And Design

<p>A high gain patch antenna inspired by 4 layers of negative refractive index (NRI) metamaterial superstrate is proposed to operate at downlink radio frequency (RF) band (935 MHz to 960 MHz of GSM 900). The metamaterial unit cell consists of a nested split ring resonator (SRR) and strip line laminated on other side of FR4 substrate. The effective permittivity and permeability of the proposed unit cell are designed synchronously to approach zero, which leads the NRI superstrate to have impedance match with zero and negative refractive index.The NRI superstrate is studied using Fabry-Perot (F-P) resonant cavity. The gain is improved by 82.48% at the air gap of 55 mm in the desired frequency band.Therefore, the gain of the antenna is effectively enhanced based on the negative refractive index metamaterial. The measured radiation pattern and S parameter results also showed that it has good agreement with the simulation results.</p>

scholarly journals High-gain PDMS-magnetite zero refractive index metamaterial antenna for Vehicle-to-Vehicle communications

2019 ◽  
Vol 8 (1) ◽  
pp. 114-120
Author(s):  
Noorlindawaty Md. Jizat ◽  
Nazihah Ahmad ◽  
Zubaida Yusoff ◽  
Mohd Faizal Jamlos
Keyword(s):  
Refractive Index ◽  
High Gain ◽  
Unit Cell ◽  
Simulation Design ◽  
Wave Impact ◽  
Suitable Candidate ◽  
Antenna Performance ◽  
Vehicle To Vehicle ◽  
Metamaterial Antenna ◽  
V2v Communications

This paper presents the simulation design of a high-gain antenna using zero refractive index fishnet metamaterial (MTM) perforated on PDMS-Magnetite substrate for Vehicle-to-Vehicle (V2V) communications. In order to design the MTM, magnetite nanoparticles, 10-nm iron oxide (Fe3O4) are dispersed into polydimethylsiloxane (PDMS) matrix. Subsequently, the unit cell is designed by removing the circular hole with radius of 3.69 mm on the PDMS-Magnetite substrate layer and arranged in 5×5 array fishnet configuration. This optimized MTM is inserted between the antenna design and pure PDMS substrate to improve the gain. The characteristic of the respective unit-cell is investigated to operate at 5.9 GHz and the effectiveness of MTM is performed by comparing the antenna performance with and without MTM. The unique characteristics of zero refractive index transform the diverging wave into plane wave for perfectly parallel wave impact on the design to improve the directivity and gain of the antenna. The proposed MTM into design improves the antenna gain to 7.36 dB without having to compromise other antenna parameters of return loss, Voltage Standing Wave Ratio (VSWR), gain, directivity, efficiency, current distribution, radiation pattern and bandwidth. These advantages has made proposed antenna as a suitable candidate for V2V in Dedicated Short Range Communication (DSRC) application since high-gain directional antenna is required to increase the sensitivity towards signals coming from certain direction.

scholarly journals Multibeam Characteristics of a Negative Refractive Index Shaped Lens

Sensors ◽  
2020 ◽  
Vol 20 (19) ◽  
pp. 5703
Author(s):  
Salbiah Ab Hamid ◽  
Nurul Huda Abd Rahman ◽  
Yoshihide Yamada ◽  
Phan Van Hung ◽  
Dinh Nguyen Quoc
Keyword(s):  
Refractive Index ◽  
High Frequency ◽  
Negative Refractive Index ◽  
Beam Width ◽  
High Gain ◽  
Base Station ◽  
Base Stations ◽  
Simulation Based ◽  
Mobile Base Station ◽  
Mobile Base

Narrow beam width, higher gain and multibeam characteristics are demanded in 5G technology. Array antennas that are utilized in the existing mobile base stations have many drawbacks when operating at upper 5G frequency bands. For example, due to the high frequency operation, the antenna elements become smaller and thus, in order to provide higher gain, more antenna elements and arrays are required, which will cause the feeding network design to be more complex. The lens antenna is one of the potential candidates to replace the current structure in mobile base station. Therefore, a negative refractive index shaped lens is proposed to provide high gain and narrow beamwidth using energy conservation and Abbe’s sine principle. The aim of this study is to investigate the multibeam characteristics of a negative refractive index shaped lens in mobile base station applications. In this paper, the feed positions for the multibeam are selected on the circle from the center of the lens and the accuracy of the feed position is validated through Electromagnetic (EM) simulation. Based on the analysis performed in this study, a negative refractive index shaped lens with a smaller radius and slender lens than the conventional lens is designed, with the additional capability of performing wide-angle beam scanning.

Compact ring resonators using negative-refractive-index microstrip line

2005 ◽  
Vol 45 (4) ◽  
pp. 294-295 ◽  
Author(s):  
Aaron D. Scher ◽  
Christopher T. Rodenbeck ◽  
Kai Chang
Keyword(s):  
Refractive Index ◽  
Microstrip Line ◽  
Negative Refractive Index ◽  
Ring Resonators ◽  
Compact Ring

scholarly journals Optical pulse dynamics in active metamaterials with positive and negative refractive index

2013 ◽  
Vol 30 (4) ◽  
pp. 1077 ◽  
Author(s):  
Alexander O. Korotkevich ◽  
Kathryn E. Rasmussen ◽  
Gregor Kovačič ◽  
Victor Roytburd ◽  
Andrei I. Maimistov ◽  
...  
Keyword(s):  
Refractive Index ◽  
Optical Pulse ◽  
Negative Refractive Index ◽  
Pulse Dynamics ◽  
Active Metamaterials
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