Using Multiple Resonances to Widen the Band for High-Permeability Spiral-Pair Metamaterials

Nguyen, Quang Minh; Zaghloul, Amir I.; Anthony, Theodore K.; Weiss, Steven J.

doi:10.1109/lawp.2019.2908148

Cited by 5 publications

(3 citation statements)

References 22 publications

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“…Different strategies for designing metamaterials with a broad bandwidth and operating at multiple frequency bands have been sought in literature. The first approach was to stack or to gather in the same plane resonators of different sizes and topologies, each of them resonating either at a frequency close to others to improve the bandwidth, or at separated frequency for a multiband operation . A second solution was to design a multiresonant elementary cell achieved either by a combination of split rings or by nested resonators .…”

Section: Introductionmentioning

confidence: 99%

Multiresonant Split Ring Resonator with Meandered Strips

Hao

Djouadi

Rault

et al. 2020

Physica Status Solidi (a)

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A multiresonant split ring resonator (SRR) composed of two circular‐shaped meandered strips is presented. Resonances are first analyzed by means of eigenmodes computation and field mapping. It is shown that a resonance can emerge from a standing wave taking place in each slot produced by a meandered strip. A slot operates as a two‐wire transmission line section short‐circuited at one termination and loaded by an open‐circuit at the other end. Consecutively, a resonance occurs approximately when a quarter‐wavelength matches the length of the slot. A resonance frequency shift is observed, and it is related to a transverse magnetic coupling between a first antisymmetric mode and a second symmetric mode. Finally, multiple resonances in an SRR are experimentally evidenced by spectroscopy of the input impedance of an SRR resonator antenna. Experimental results are favorably compared with simulation.

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Section: Introductionmentioning

confidence: 99%

Multiresonant Split Ring Resonator with Meandered Strips

Hao

Djouadi

Rault

et al. 2020

Physica Status Solidi (a)

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“…In this section, we tackle the narrowband issue by using the concept of multiresonance as proposed in our previous work [18]. We present a macrocell design consisting of multi-unit cells with small incremental variations in dimension.…”

Section: Increasing Bandwidth Of Ml-loaded Elc Resonatorsmentioning

confidence: 99%

“…Unlike existing designs, the proposed design exhibits strong electric response with minimal magnetic and magnetoelectric effects. Furthermore, by introducing incremental variations in the dimensions of the meander line, we can broaden the operating bandwidth using the concept of multiresonant structures [18]. The design is simulated using the commercial electromagnetic simulator FEKO to obtain the scattering parameters S. Then the effective constitutive parameters, i.e., permittivity, permeability, and refractive index, are calculated through the retrieval process, which uses the S-parameters as the input [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

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RSL

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Alternative designs for wideband compact electric-inductive-capacitive (ELC) inclusions, which can be used to construct metamaterials with desired high permittivity over a wide frequency band, are proposed and analyzed in this letter. To design a compact ELC inclusion, we incorporate a meander line (ML) into the conventional ELC structure. This helps to increase the equivalent inductance, which could lower the resonant frequency of the structure effectively. To expand the operating bandwidth, we introduce incremental variations in the dimensions of the ML. This helps create multiresonant responses of metamaterials, which could achieve high permittivity over a wide frequency band. The proposed design, which has an electrical size of about 1/14 of the wavelength in free space, can achieve approximately 40% more bandwidth than the single-resonance case for permittivity values greater than 3.5, or a 350 MHz bandwidth at 5 GHz. Experimental verifications were carried out to verify the design concept.

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