A Defected Ground Structure Based on Matryoshka Geometry

Neto, Alfrêdo Gomes; Silva, Jefferson Costa e; Coutinho, Ianes Barbosa Grécia; Filho, Saulo Souto Camilo; Santos, Danila Araújo; Albuquerque, Bruno Lima Cavalcanti de

doi:10.1590/2179-10742022v21i2256115

Cited by 4 publications

(4 citation statements)

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“…Due to ease of integration, design flexibility, and compactness, DGSs have found several applications such as in planar antennas [58,59], filters [60,61], power dividers [62,63], sensors [64,65], and wireless power transfer [66,67]. A DGS based on a Matryoshka geometry, as shown in Figure 54, was introduced in [30,43,68]. In [30], a method to design this type of DGS based on simple formulas is proposed.…”

Section: Filters With a Dgsmentioning

confidence: 99%

Planar Printed Structures Based on Matryoshka Geometries: A Review

Neto,

Silva,

Carvalho

et al. 2024

Micromachines

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A review on planar printed structures that are based on Matryoshka-like geometries is presented. These structures use the well-known principle of Matryoshka dolls that are successively nested inside each other. The well-known advantages of the planar printed technology and of the meandered nested Matryoshka geometries are combined to generate miniaturized, multi-resonance, and/or wideband configurations. Both metal and complementary slot structures are considered. Closed and open configurations were analyzed. The working principles were explored in order to obtain physical insight into their behavior. Low-cost and single-layer applications as frequency-selective surfaces, filters, antennas, and sensors, in the microwave frequency region, were reviewed. Potential future research perspectives and new applications are then discussed.

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Section: Filters With a Dgsmentioning

confidence: 99%

Planar Printed Structures Based on Matryoshka Geometries: A Review

Neto,

Silva,

Carvalho

et al. 2024

Micromachines

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“…As the rings are interconnected, the effective length of the matryoshka ring increases, without increasing the occupied area, limited to the area of the outmost concentric ring. This characteristic, when applied to frequency selective surfaces [19], [20] and filters [18], gives to matryoshka geometry a multi-resonance and more selective frequency response, as well as miniaturized dimensions. Although it is possible to use more than two concentric rings forming the matryoshka ring, in this work only two concentric rings will be considered.…”

Section: Proposed Matryoshka Dgs Designmentioning

confidence: 99%

“…Usually, 𝑤 𝑥𝑚𝑎1 = 𝑤 𝑦𝑚𝑎1 = 𝑤 𝑚𝑎1 and 𝑤 𝑥𝑚𝑎2 = 𝑤 𝑦𝑚𝑎2 = 𝑤 𝑚𝑎2 . As a first approach, the resonant frequency can be estimated by [18]:…”

Section: Proposed Matryoshka Dgs Designmentioning

confidence: 99%

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Compact Matryoshka DGS Using Dielectric Resonator

Neto,

Silva,

de Carvalho

et al. 2024

IEEE Access

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In this paper, a compact matryoshka DGS using dielectric resonator (DR) is proposed. Despite the use of dielectric resonators to obtain band-stop frequency response not being a new idea, the proposed compact matryoshka DGS is an original contribution, since only recently the matryoshka geometry was used in DGS applications. Furthermore, a numerical analysis of the positioning of the DR is presented, which makes it possible to determine the region of the DGS for which the minimum resonant frequency is reached, and the resonant frequency range that can be obtained. To the best of the authors' knowledge, this numerical analysis is an unpublished result, even more so, for the matryoshka DGS. The matryoshka geometry was described, including initial design equations. To verify the expected characteristics (miniaturization, selectivity, and resonant frequency tunability), two compact matryoshka DGSs (DGS1 and DGS2) were designed using a high permittivity ceramic (MCT-115) as DR. The obtained numerical and experimental results showed good agreement, and the initial design equations proved to be applicable, which allows new dimensions to be determined for other resonant frequencies, according to the application requirements. Resonant frequencies ranging from the maximum value to 33% (DGS1) and 27% (DGS2) were achieved, depending on the DR position. Considering 𝜆 0 the wavelength in free space, corresponding to the resonant frequency, DGS1 and DGS2 achieved an occupied area of 0.04𝜆 0 × 0.04𝜆 0 , and 0.05𝜆 0 × 0.05𝜆 0 , respectively, a good miniaturization. The proposed compact matryoshka DGS may be especially attractive for applications that require a very selective band-stop frequency response. If a wider band-stop is required, the proposed DGS can be cascaded.INDEX TERMS Defected ground structure, DGS, dielectric resonator, high permittivity ceramic, matryoshka.

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