scholarly journals Bandwidth and gain enhancement of a circular microstrip antenna using a DNG split ring resonator radome

2019 ◽  
Vol 8 (2) ◽  
pp. 637-643
Author(s):  
Ojo Rasheed ◽  
Mohd Faizal Jamlos ◽  
Ping Jack Soh ◽  
Mohd Aminudin Jamlos ◽  
Muammar Mohamad Isa
Keyword(s):  
Refractive Index ◽  
Microstrip Antenna ◽  
Ring Resonator ◽  
Split Ring Resonator ◽  
Negative Permittivity ◽  
Double Negative ◽  
Split Ring ◽  
Circular Patch ◽  
Gain Enhancement ◽  
Circular Microstrip Antenna

This paper present the design of a circular patch microstrip antenna with enhancement in terms of bandwidth and gain using a dielectric double negative (DNG) split ring metamaterial radome. This radome is positioned on top of the CP antenna operating from 5.2 GHz to 6.4 GHz. The metamaterial radome comprises of two alternate split rings of negative permittivity, permeability and refractive index. The circular microstrip antenna bandwidth of 430 MHz has been realized by the presence of DNG metamaterial radome compared to 220 MHz without the radome. The gain has been increased as well from 1.84 dBi to 3.87 dBi.

Characteristics of Left Handed Materials

2021 ◽  
Vol 19 (11) ◽  
pp. 01-14
Author(s):  
Thill A. Kadhum Al-Musawi ◽  
Samira Adnan Mahdi ◽  
Sundus Yaseen Hasan AL-Asadi
Keyword(s):  
Computer Simulation ◽  
Refractive Index ◽  
Ring Resonator ◽  
Split Ring Resonator ◽  
Negative Permittivity ◽  
Split Ring ◽  
Left Handed ◽  
Artificial Materials ◽  
Permittivity And Permeability ◽  
Gap Width

Researchers have been interested in studying so-called Left-Handed Metamaterials LHM, which are artificial materials. These materials have unusual characteristics, like negative permittivity and permeability, and therefore negative index. This paper has been discussed some characteristics of LHM by designing a square split ring resonator SRR and simulating with CST microwave studio (Computer Simulation Technology) to get S-parameters. The broadband frequencies (0-30) GHz were taking to specify the effective range of frequencies to work with, which was found to be between (8- 14) GHz. Then, the parameters of SRR have been varied such as split width on, gap width, metal width, rod width and metal material. The measurements show some of parameters have been affected the values of resonance frequency and the others are not. Also, the negative values of permittivity, permeability, and refractive index have been approved.

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