Design of a transmission-line metamaterial with a negative index of refraction at S-Band / Concepção de um metamaterial de linha de transmissão com um índice negativo de refracção na banda S

2021 ◽  
Vol 7 (7) ◽  
pp. 73312-73322
Author(s):  
Lucas Douglas Ribeiro ◽  
Arthur Henrique de Lima Ferreira ◽  
Juscelino Júnior De Oliveira ◽  
Rose Mary de Souza Batalha
Keyword(s):  
Transmission Line ◽  
Transverse Electric ◽  
Negative Refractive Index ◽  
Impedance Matching ◽  
Equivalent Circuit Model ◽  
Index Of Refraction ◽  
Two Dimensional ◽  
Dispersion Characteristics ◽  
Negative Index Of Refraction ◽  
Line Network

A metamaterial based on a two-dimensional transmission-line network loaded with inductors and capacitors enabling to achieve negative-refractive-index (NRI) is developed. The dispersion characteristics are calculated by their equivalent circuit model and an operating frequency of 2.95 GHz in which there is impedance matching with free space is chosen in the S-Band. This NRI metamaterial supports transverse electric (TE) waves, thus it can be used in applications such as lensing. 

Negative Refractive Index Materials

2006 ◽  
Vol 3 (2) ◽  
pp. 189-218 ◽  
Author(s):  
Victor Veselago ◽  
Leonid Braginsky ◽  
Valery Shklover ◽  
Christian Hafner
Keyword(s):  
Photonic Crystals ◽  
Negative Refraction ◽  
Negative Refractive Index ◽  
Index Of Refraction ◽  
Negative Index ◽  
Practical Applications ◽  
The Third ◽  
Left Handed ◽  
Negative Index Of Refraction ◽  
History Of

The main directions of studies of materials with negative index of refraction, also called left-handed or metamaterials, are reviewed. First, the physics of the phenomenon of negative refraction and the history of this scientific branch are outlined. Then recent results of studies of photonic crystals that exhibit negative refraction are discussed. In the third part numerical methods for the simulation of negative index material configurations and of metamaterials that exhibit negative index properties are presented. The advantages and the shortages of existing computer packages are analyzed. Finally, details of the fabrication of different kinds of metamaterials are given. This includes composite metamaterials, photonic crystals, and transmission line metamaterials for different wavelengths namely radio frequencies, microwaves, terahertz, infrared, and visible light. Furthermore, some examples of practical applications of metamaterials are presented.

Multi-band Monopole Antennas Loaded with Metamaterial TL

Frequenz ◽  
2015 ◽  
Vol 69 (5-6) ◽  
Author(s):  
Zhi-jie Song ◽  
Jian-gang Liang
Keyword(s):  
Transmission Line ◽  
Equivalent Circuit ◽  
Impedance Matching ◽  
Equivalent Circuit Model ◽  
Circuit Model ◽  
Radiation Patterns ◽  
Archimedean Spiral ◽  
Lumped Element ◽  
Monopole Antennas ◽  
Better Than

AbstractA novel metamaterial transmission line (TL) by loading complementary single Archimedean spiral resonator pair (CSASRP) is investigated and used to design a set of multi-frequency monopole antennas. The particularity is that the CSASRP which features dual-shunt branches in the equivalent circuit model is directly etched in the signal strip. By smartly controlling the element parameters, three antennas are designed and one of them covering UMTS and Bluetooth bands is fabricated and measured. The antenna exhibits impedance matching better than –10 dB and normal monopolar radiation patterns at working bands of 1.9–2.22 and 2.38–2.5 GHz. Moreover, the loaded element also contributes to the radiation, which is the major advantage of this prescription over previous lumped-element loadings. The proposed antenna is also more compact over previous designs.

scholarly journals Design and analysis of an isotropic two-dimensional planar Composite Right/Left-Handed waveguide structure

2011 ◽  
Vol 9 ◽  
pp. 73-78 ◽  
Author(s):  
M. A. Eberspächer ◽  
M. Bauer ◽  
T. F. Eibert
Keyword(s):  
Equivalent Circuit Model ◽  
Simulation Software ◽  
Waveguide Structure ◽  
Unit Cell ◽  
Index Of Refraction ◽  
Mode Analysis ◽  
Two Dimensional ◽  
Microstrip Technology ◽  
Left Handed ◽  
Isotropic Composite

Abstract. A two-dimensional isotropic Composite Right/Left-Handed (CRLH) waveguide structure is proposed which is designed for operation in X-band. The balanced structure possesses left-handed behaviour over a large bandwidth from 7.5 GHz up to its transition frequency at 10 GHz. Above this region, the unit cell behaves in a right-handed manner up to 13.5 GHz. Operating the structure within these bands yields a frequency dependent index of refraction ranging from −2.5 ≤ n ≤ 0.8. Isotropic characteristics are obtained between 8.5 GHz ≤ f ≤ 12 GHz resulting in −1.5 ≤ n ≤ 0.8. The planar CRLH structure is designed based on transmission line theory, implemented in microstrip technology and optimized using full-wave simulation software. An equivalent circuit model is determined describing the electromagnetic behaviour of the structure whose element values are obtained by even and odd mode analysis. The design of the unit cell requires an appropriate de-embedding process in order to enable an analysis in terms of dispersion characteristics and Bloch impedance, which are performed both.

scholarly journals Design of a Novel Miniaturized Frequency Selective Surface Based on 2.5-Dimensional Jerusalem Cross for 5G Applications

2018 ◽  
Vol 2018 ◽  
pp. 1-6 ◽  
Author(s):  
Peng Zhao ◽  
Yihang Zhang ◽  
Rongrong Sun ◽  
Wen-Sheng Zhao ◽  
Yue Hu ◽  
...  
Keyword(s):  
Resonant Frequency ◽  
Equivalent Circuit ◽  
Equivalent Circuit Model ◽  
Frequency Selective Surface ◽  
Size Reduction ◽  
Two Dimensional ◽  
Physical Insight ◽  
Frequency Selective ◽  
Significant Size ◽  
Insight Into

A compact frequency selective surface (FSS) for 5G applications has been designed based on 2.5-dimensional Jerusalem cross. The proposed element consists of two main parts: the successive segments of the metal traces placed alternately on the two surfaces of the substrate and the vertical vias connecting traces. Compared with previous published two-dimensional miniaturized elements, the transmission curves indicate a significant size reduction (1/26 wavelengths at the resonant frequency) and exhibit good angular and polarization stabilities. Furthermore, a general equivalent circuit model is established to provide direct physical insight into the operating principle of this FSS. A prototype of the proposed FSS has been fabricated and measured, and the results validate this design.

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