Role of bianisotropy in negative permeability and left-handed metamaterials

Marqués, R.; Medina, F.; Rafii-El-Idrissi, R.

doi:10.1103/physrevb.65.144440

Cited by 860 publications

(636 citation statements)

References 12 publications

(30 reference statements)

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“…It is a resonant LC circuit that is shown to produce effective permeability and permittivity on propagating electromagnetic waves [8]. The design is based on circular double split ring resonators designed, modeled and fabricated by Marqués et al However, our design and modeling deviates from Marqués et al modeling based on two different characteristics [16]. First, our design is a rectangular double split ring resonator design, not a circular design.…”

Section: Theorymentioning

confidence: 90%

Using Inductance as a Tuning Parameter for RF Meta-atoms

2012

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Abstract:The resonant frequency of metamaterials structured with split ring resonator (SRR) meta-atoms is determined primarily through the capacitance and inductance of the individual meta-atoms. Two designs that vary inductance incrementally were modeled, simulated, fabricated, and tested to investigate the role inductance plays in metamaterial designs. The designs consisted of strategically adding sections to the SRR to increase the inductance, but in a manner that minimized capacitance variations. Each design showed a shift in resonant frequency that was proportional to the length of the added section. As the length of each section was increased, the resonant frequency shifted from 2.78 GHz to 2.18 GHz.

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Section: Theorymentioning

confidence: 90%

Using Inductance as a Tuning Parameter for RF Meta-atoms

2012

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“…The rings can be either square or circular in shape. Square SRRs are preferred to enhance magnetic coupling [12,15,24]. Thus by etching SRRs on both sides of a thin dielectric slab, the distributed capacitance between the rings can be significantly enhanced owing to the broadside coupling [11] which results in a lower resonant frequency compared to the edge-coupled SRRs.…”

Section: Conventional Broadside-coupled Resonatorsmentioning

confidence: 99%

“…Sub-wavelength structures such as open-loop resonators, splitring resonators (SRRs), miniaturized hair-pin resonators and other microstrip structures have been successfully used to design compact filters at microwave frequencies [5,[13][14][15][16][17][18][19][20][21][22][23], since these resonators can be designed with dimensions much smaller than the signal wavelength at their resonant frequency. Broadside coupled split-ring resonators with cross coupling are chosen to serve the purpose of implementing the multilayer filter compared to the conventional splitring resonators [12] to eliminate the cross-polarization effects [24] and to realize miniaturized structures. In order to improve the selectivity of the bandpass filter, cross-coupling is introduced among the resonators to achieve elliptic function response with a pair of attenuation pole at finite frequencies, thereby improving selectivity [25].…”

Section: Introductionmentioning

confidence: 99%

Compact Two-Layer Microstrip Bandpass Filters Using Broadside-Coupled Resonators

Vegesna¹,

Saed²

2012

PIER B

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Abstract-This paper presents a design methodology for realizing broadside-coupled microstrip bandpass filters on multilayer substrates to reduce the size of the filter. The new filter configuration consists of broadside coupled split-ring resonators on two layers backed by a ground plane. With the proposed new method, miniaturization to a greater extent can be achieved compared to the conventional method of realizing microstrip multilayer filters. In addition, coupling apertures in the ground plane used to achieve coupling among the resonators in conventional multilayer structures are eliminated. The proposed design is more flexible compared to traditional multilayer filters. Layers can be easily added to increase the filter order. To demonstrate the method, a miniaturized two-layered bandpass filter centered at 728 MHz with low insertion loss is implemented and investigated. Miniaturization of more than 25% is achieved compared to the conventional broadside coupled structure and more than 40% miniaturization compared to the edge coupled structure. The new microstrip filter discussed in this paper can be realized using simple fabrication techniques.

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“…Examples of these properties are negative permeability [1,2], negative permittivity [3], and negative index of refraction [4,5]. Correctly engineering and controlling these properties has yielded advances in cloaking [6], lensing [7,8], and antenna design [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Bandwidth Tuning in Transistor Embedded Metamaterials Using Variable Resistance

Barrett¹,

Katko²,

Cummer³

2016

PIER

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Abstract-Metamaterials have been previously loaded with diodes and other types of passive circuit elements. Transistors offer an alternative to these established loading elements to expand the possible capabilities of metamaterials. With embedded transistors, additional degrees of freedom are achieved and lay out the architecture for more complex electromagnetic metamaterial design. A mathematical analysis of transistor loaded SRR unit cells is described in which the transistor acts as a variable resistor. From the mathematical analysis, we calculate transmission coefficients for a single unit cell. We then experimentally measure two SRRs with tunable quality factors and thus tunable bandwidth based upon modulating the effective loading circuit resistance to confirm the calculations. From the agreement between the calculated and measured transmission coefficients, we expand the analysis to show that a slab of more densely packed unit cells can achieve negative permeability with varying degrees of dispersion.

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Role of bianisotropy in negative permeability and left-handed metamaterials

Cited by 860 publications

References 12 publications

Using Inductance as a Tuning Parameter for RF Meta-atoms

Using Inductance as a Tuning Parameter for RF Meta-atoms

Compact Two-Layer Microstrip Bandpass Filters Using Broadside-Coupled Resonators

Bandwidth Tuning in Transistor Embedded Metamaterials Using Variable Resistance

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