Experimental investigation of radiation properties of an antenna embedded in low permittivity thin‐wire‐based metamaterial

Bonefačić, Davor; Hrabar, Silvio; Kvakan, Dražen

doi:10.1002/mop.21994

Cited by 16 publications

(5 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Substituting the value of periodic interaction constant, i.e. C p int given by Equations (6)- (8) in Equation (30) and simplifying, the modified dispersion equation can be written as,…”

Section: Imperfections For a Uniaxial Wire Mediummentioning

confidence: 99%

“…k m y = iα xm (8) where α xm = k 2 xm − k 2 ρ with Re[α xm ] > 0 and k xm = k x + 2π m/d x . Also C is the Euler's constant, i.e.…”

Section: A Uniaxial Periodic Wire Mediummentioning

confidence: 99%

“…The directive radiation characteristics of different type of antennas embedded in wire medium have been discussed in [8][9][10][11]. Also, the electromagnetic properties of a waveguide and cavity resonator filled with wire medium are studied by Nefedov and Viitanen [12] and Couture et al [13] respectively.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Imperfections for an equivalent surface impedance of a uniaxial wire medium

Awan

2014

Journal of Electromagnetic Waves and Applications

View full text Add to dashboard Cite

A uniaxial wire medium is a medium formed by a two-dimensional array of conducting parallel thin wires. An analytical study of small imperfections in positioning of wires is considered for an equivalent surface impedance of this wire medium. It is studied that effects of these small imperfections in positioning of wires introduce an equivalent additional surface impedance. This additional impedance is taken to be an error impedance which is mainly dependent upon the positioning error standard deviations along two orthogonal directions. It is further studied that an increase in the positioning error standard deviations along two perpendicular directions increases the magnitude of this error impedance. Also, if the propagation of wave is taken to be normal inside the wire medium then the effects of imperfections in a plane along direction of propagation are more pronounced than these imperfections in a plane transverse to the direction of propagation.

show abstract

“…Substituting the value of periodic interaction constant, i.e. C p int given by Equations (6)- (8) in Equation (30) and simplifying, the modified dispersion equation can be written as,…”

Section: Imperfections For a Uniaxial Wire Mediummentioning

confidence: 99%

“…k m y = iα xm (8) where α xm = k 2 xm − k 2 ρ with Re[α xm ] > 0 and k xm = k x + 2π m/d x . Also C is the Euler's constant, i.e.…”

Section: A Uniaxial Periodic Wire Mediummentioning

confidence: 99%

See 1 more Smart Citation

Imperfections for an equivalent surface impedance of a uniaxial wire medium

Awan

2014

Journal of Electromagnetic Waves and Applications

View full text Add to dashboard Cite

show abstract

“…[17][18][19] A zero refractive index condition can be achieved by three different cases of the permittivity and permeability. [17][18][19] A zero refractive index condition can be achieved by three different cases of the permittivity and permeability.…”

Section: Introductionmentioning

confidence: 99%

Synthesizing metamaterials with angularly independent effective medium properties based on an anisotropic parameter retrieval technique coupled with a genetic algorithm

Jiang

Bossard

Wang

et al. 2011

Journal of Applied Physics

View full text Add to dashboard Cite

Articles you may be interested inEffects of parameter variations on negative effective constitutive parameters of non-metallic metamaterials J. Appl. Phys. 113, 063501 (2013); 10.1063/1.4790714 Asymmetrical stripline based method for retrieving the electromagnetic properties of metamaterials J. Appl. Phys. 113, 024912 (2013); 10.1063/1.4775721Full extraction methods to retrieve effective refractive index and parameters of a bianisotropic metamaterial based on material dispersion models Determination of the effective parameters of a metamaterial by field summation method Effective properties of split-ring resonator metamaterials using measured scattering parameters: Effect of gap orientationIn this paper, we present a method to retrieve the effective electromagnetic parameters of a slab of anisotropic metamaterial from reflection and transmission coefficients ͑or scattering parameters͒. In this retrieval method, calculated or measured scattering parameters are employed for plane waves incident obliquely on a metamaterial slab at different angles. Useful analytical expressions are derived for extracting the homogeneous anisotropic medium parameters of a metamaterial. To validate the method, the effective permittivity and permeability tensor parameters for a composite split-ring resonator-wire array are retrieved and shown to be consistent with observations previously reported in the literature. This retrieval method is further incorporated into a genetic algorithm ͑GA͒ to synthesize an infrared zero-index-metamaterial with a wide field-of-view, demonstrating the utility of the new design approach. The anisotropic parameter retrieval algorithm, when combined with a robust optimizer such as GA, can provide a powerful design tool for exploiting the anisotropic properties in metamaterials to achieve specific angle dependant or independent responses.

show abstract

“…In such a 2D configuration a purely field is excited, with the electric field polarized along the wire axis , and thus the homogenized metamaterial can be treated as isotropic; conditions for maximizing radiation at broadside and for achieving high broadside directivity have been derived in [10], and they have been shown to be related to the excitation of a weakly-attenuated dominant leaky mode supported by the grounded metamaterial slab when its equivalent permittivity is positive and much smaller than one. In [24], experimental results on highlydirective antennas based on wire-medium slabs have been presented. In [25] we have compared the leaky-wave model with a pure geometrical-optics analysis.…”

Section: Introductionmentioning

confidence: 99%