Homogenization of metamaterials due to fractaloid structures in the microwave regime

Lenz, E; Henke, Heino

doi:10.1088/1464-4258/11/11/114021

Cited by 3 publications

(2 citation statements)

References 32 publications

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“…Essentially, an increment in the structural capacitance results in a realizable unit cell size down to λ 0 /40 for an MSRR and λ 0 /250 for an SR 13 . Fractal-based metamaterials with magnetic-field coupling similar to double SRR's have been reported 15 . The increased perimeter of the structure as a result of the fractal self-similarity leads to larger inductance and capacitance and a reduction in the resonance frequency.…”

Section: Existing Solutionsmentioning

confidence: 99%

Compact electric-LC resonators for metamaterials

Withayachumnankul¹,

Abbott²

2010

Opt. Express

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Alternative designs to an electric-LC (ELC) resonator, which is a type of metamaterial inclusion, are presented in this article. Fitting the resonator with an interdigital capacitor (IDC) helps to increase the total capacitance of the structure. In effect, its resonance frequency is shifted downwards. This implies a decreased overall resonator size with respect to its operating wavelength. As a result, the metamaterial, composed of an array of IDC-loaded ELC resonators with their collective electromagnetic response, possesses improved homogeneity and hence is less influenced by diffraction effects of individual cells. The impact of incorporating an IDC into ELC resonators in terms of the electrical size at resonance and other relevant properties are investigated through both simulation and experiment in the microwave regime. The proposed structures can be applied to the terahertz and infrared regimes via appropriate lithographic scaling.

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Section: Existing Solutionsmentioning

confidence: 99%

Compact electric-LC resonators for metamaterials

Withayachumnankul¹,

Abbott²

2010

Opt. Express

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“…Left-hand metamaterials can generally be divided into five types: patch-typed metamaterials, film-laminated metamaterials, granular composite metamaterials, transmission line metamaterials and fishing-net metamaterials [5][6][7][8][9]. By means of a mature manufacturing process in printed circuit boards (PCBs), patch-typed metamaterial configurations can be of almost unlimited designs, such as H-shape, I-shape and Omega-shape [10][11][12][13][14][15][16][17][18][19][20]. These researches have focused on the gigahertz frequency band, especially on the radio frequency band.…”

Section: Introductionmentioning

confidence: 99%

Topology optimization of patch-typed left-handed metamaterial configurations for transmission performance within the radio frequency band based on the genetic algorithm

Dong¹,

Liu²

2012

J. Opt.

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For the requirement of broadband transmission with low attenuation within the radio frequency band, a topology optimization model of microstructure configuration design of patch-typed left-handed metamaterials is established, with the objective function defined by the ratio of the mean attenuation to the absolute left-handed bandwidth; then a genetic algorithm based solution method and flow chart of the topology optimization are presented. An improved electromagnetic simulation analysis method is used to obtain accurate equivalent electromagnetic parameters from the S-parameter retrieval process. Three patch-typed microstructure configurations are given according to the results of topology optimization designs for different lattice sizes, and the transmission performance indicators of these creative configurations are computed and analyzed by numerical simulation. The contrast of the design results shows that a U-shaped-like structure of half a unit cell height exists among all these optimum configurations. It is found through a further analysis that the distribution of conduction currents of U-shaped-like structures is the key to broadband transmission with low attenuation. Finally, a new topology optimization design with the perimeter constraint is proposed to solve the problem in the manufacturing process for checkerboard-typed lattices from these configurations.

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Miniaturization of 3-D Anistropic Zero-Refractive-Index Metamaterials With Application to Directive Emissions

Wang

Cai

2014

IEEE Trans. Antennas Propagat.

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Homogenization of metamaterials due to fractaloid structures in the microwave regime

Cited by 3 publications

References 32 publications

Compact electric-LC resonators for metamaterials

Compact electric-LC resonators for metamaterials

Topology optimization of patch-typed left-handed metamaterial configurations for transmission performance within the radio frequency band based on the genetic algorithm

Miniaturization of 3-D Anistropic Zero-Refractive-Index Metamaterials With Application to Directive Emissions

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