Negative electrical permittivity in metamaterials for a wire of rectangular cross-sectional: an application to antennas design

G, Héctor Lorduy; Castellanos, Luis M.

doi:10.1080/09205071.2020.1791739

Cited by 2 publications

(2 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…where 𝑘 is the dielectric constant of the surrounding environment and c the speed of light in the free space. The effective electrical permittivity of the wire with rectangular cross-sectional is determined by using the Drude-Lorentz model and is given by [36],…”

Section: B Transmittance In a Metamaterialmentioning

confidence: 99%

Theoretical model for the transmittance in a left-handed metamaterial of different geometries

Salazar

2023

J. Microw. Optoelectron. Electromagn. Appl.

Self Cite

View full text Add to dashboard Cite

In this work, a theoretical model for the transmittance in a left-handed metamaterial of different geometries is presented. The proposed unit cells are a combination of conducting wires of rectangular cross-section with square-ring and hexagonal resonators. In this new dielectric compound, dependence of transmittance on the thickness of the resonators are analyzed for the particular case of normal incidence in the GHz range. It is found that the transmittance for the hexagonal resonator shows a significant increase compared to the square geometry resonator.

show abstract

Section: B Transmittance In a Metamaterialmentioning

confidence: 99%

Theoretical model for the transmittance in a left-handed metamaterial of different geometries

Salazar

2023

J. Microw. Optoelectron. Electromagn. Appl.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Materials with negative permittivity in the radio frequency (RF) have attracted much attention in recent years due to their great potential applications in electronic devices such as electromagnetic stealth, capacitors, transistors, and antennas . In general, the negative permittivity in RF can be achieved by the plasma oscillation of conductors or the dielectric resonance of ferroelectric materials under an applied electric field. − In past reports, these two negative permittivity behaviors have mostly appeared in different materials, − and thus have been studied separately.…”

Section: Introductionmentioning

confidence: 99%

Negative Permittivity Behaviors Derived from Dielectric Resonance and Plasma Oscillation in Percolative Bismuth Ferrite/Silver Composites

Yang

Sun

et al. 2022

J. Phys. Chem. C

View full text Add to dashboard Cite

Negative permittivity of materials can be obtained by plasma oscillation or dielectric resonance, but the relationship between these two negative permittivity behaviors has been neglected. Combining the advantages of two negative permittivity behaviors, the negative permittivity can be more tunable and is expected to realize epsilon-near-zero behavior. In this work, percolative bismuth ferrite/silver composites with different contents of Ag were successfully fabricated by a simple solid-state sintering method. With the addition of Ag, the Lorentz-like and Drude-like negative permittivity behaviors were successively observed in bismuth ferrite/silver composites. The reasons for the two types of negative permittivity behaviors are dielectric resonance and plasma oscillation, respectively. Further investigation revealed that the synergistic effect of dipole resonance and free electrons led to a change of resonance frequency, a decrease of magnitude, and a transition of two negative permittivity behaviors. Moreover, with the addition of Ag in percolative bismuth ferrite/silver composites, the electrical conductivity and thermal conductivity changed abruptly at a certain volume fraction, suggesting a percolation behavior.

show abstract

Negative electrical permittivity in metamaterials for a wire of rectangular cross-sectional: an application to antennas design

Cited by 2 publications

References 23 publications

Theoretical model for the transmittance in a left-handed metamaterial of different geometries

Theoretical model for the transmittance in a left-handed metamaterial of different geometries

Negative Permittivity Behaviors Derived from Dielectric Resonance and Plasma Oscillation in Percolative Bismuth Ferrite/Silver Composites

Contact Info

Product

Resources

About