Modified minkowski fractal multiband antenna with circular-shaped split-ring resonator for wireless applications

Rajkumar, R.; Dhanasekaran, D.; Chakraborty, Chinmay; Ponnan, Suresh

doi:10.1016/j.measurement.2021.109766

Cited by 26 publications

(9 citation statements)

References 31 publications

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“…Figures 1(a)-(c) exhibit intuitively the three different levels of fractal SM unit cells, which are composed of cross-shaped and U-shaped pillars (marked in blue). The combined U-shaped fractal SM (abbreviated to UFSM) is designed in a similar way to the Minkowski fractal geometry, which delivers higher performance in terms of miniaturization and bandwidth compared to other fractal geometries, such as Koch and Sierpinski fractal types [23]. The fractal pattern is created by iterating the initial combined structural geometry, which consists of a crossshaped and four U-shaped pillars, as shown in figure 1(a).…”

Section: Models and Methodsmentioning

confidence: 99%

Minkowski-like fractal seismic metamaterial with wide low-frequency band gaps on single and layered soil

Li¹,

Du²,

Peng³

et al. 2022

J. Phys. D: Appl. Phys.

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In this paper, we propose a resource-efficient Minkowski-like fractal seismic metamaterial by hybridizing U-shaped and cross-shaped pillars, providing wide complete band gaps due to its multi-scale self-similar property. Numerical modeling of seismic surface waves is used to study the band structure and transmission of our seismic metamaterial. A comparison of the band structures of the developed seismic metamaterials with various levels reveals that the iteration order itself is responsible for the increase in the number of frequency bands and the decrease of the center frequencies of the band gaps. Furthermore, the vibration modes are calculated and examined to understand the mechanism of band gap generation. To demonstrate the efficiency of earthquake shielding in multiple complete band gaps, investigations of seismic surface waves propagation on a 1D array of Minkowski-like fractal structure units on the surface of single and layered semi-infinite substrates are employed, and the results show that the layered soil has the function of widening band gaps by itself. Our proposed Minkowski-like fractal structure due to its multi-scale and self-similarity mitigates the intrinsic drawback of the narrow band gap of resonant metamaterials, providing a superior alternative in seismology and related areas of multi-frequency band vibration reduction. Moreover, its green design and manufacturing due to low filling rates, strong wear resistance, and ductility, can realize the low-carbon and sustainable development of the construction industry.

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Section: Models and Methodsmentioning

confidence: 99%

Minkowski-like fractal seismic metamaterial with wide low-frequency band gaps on single and layered soil

Li¹,

Du²,

Peng³

et al. 2022

J. Phys. D: Appl. Phys.

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“…Designing compact antennas with a wide bandwidth and good radiation performance is therefore a challenge. Many effective methods of bandwidth optimization have been proposed intensively, such as increasing substrate thickness [3], aperture coupling feeding [4], multi-layer metallic-dielectric array radiator [5], double dipole with stubs [6], or fractal geometry [7]. Meanwhile, several schemes for antenna gain optimization have also been proposed, such as the use of parasitic patches [8], shorted pins [9], array technology [10], and Fabry-Perot resonator cavity [11].…”

Section: Introductionmentioning

confidence: 99%

Low-Profile High-Gain Wideband Multi-Resonance Microstrip-Fed Slot Antenna With Anisotropic Metasurface

Zhou¹,

Cheng²,

Chen³

et al. 2022

PIER

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In this work, a high-gain and wideband microstrip-fed slot antenna is proposed and investigated, which is composed of an anisotropic metasurface (AMS) and an aperture coupled structure. The proposed microstrip antenna with four resonances can be obtained by merging the AMS with an anomalous inverted π-slot feed structure in a low profile (1.07λ × 1.07λ × 0.06λ). The simulated results indicate that the proposed microstrip antenna can achieve a wide impedance bandwidth of 56.1% from 3.32 to 5.91 GHz, which is verified by experiment. In addition, the measured results show that the peak gain of the proposed microstrip-fed slot antenna is 10.7 dBi at 5.3 GHz, and the relative bandwidth of 3-dBi gain is 42.2% from 3.85 to 5.91 GHz. Compared with previous works, the proposed design has a lower profile while achieving a much wider operating bandwidth, where the four controllable resonance modes offer more possibilities for band expansion. This work shows potential application in integration with high data rate systems.

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“…Wideband frequency characteristics have been achieved with the antenna substrate consist of epoxy-based composite having the tunable characteristics of the antenna discussed for multiband applications [9]. dual-band resonance investigated in fractal antenna with split-ring resonator for various wireless communications [10]. Dual-band rejection antenna with fork shaped inverted L-stub for UWB application was investigated [11].…”

Section: Introductionmentioning

confidence: 99%

Tuning of dual frequency resonance analysis of circular and rectangular patch UWB antenna used for wireless sensor networks

Sugapriya¹,

Omkumar

2022

ijhs

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In our modern digital world, communication plays a most important role in research of new designs and novel findings. The proposed analysis is based on Ultra-wide band microstrip patch antenna with two methods of circular and rectangular patch. The design analysis and comparison of various antenna parameters are used for wireless sensor networks. The V-shaped slot is introduced on top of the circular patch and the horizontal T-shaped slot on rectangular patch using jeans substrate material, the design gives good resonance frequency of 9.5GHz and 7.7GHz for wireless communication networks. At resonance the receiver of UWB antenna has a frequency sensing element and the antenna parameters were analyzed using High Frequency Structural Simulator. From the analysis, gain of an antenna, VSWR, return loss as well as radiation pattern, Specific Absorption Rate SAR values are in the acceptable range. The VSWR value of both rectangular and circular patch is 1.05, return loss below -11dB determined in order to avoid surface wave propagation, the specific absorption rate SAR value should be below 2W and gain of each antenna consists of positive value. Hence the antenna meets the requirement suitable for wireless sensor network application.

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Modified minkowski fractal multiband antenna with circular-shaped split-ring resonator for wireless applications

Cited by 26 publications

References 31 publications

Minkowski-like fractal seismic metamaterial with wide low-frequency band gaps on single and layered soil

Minkowski-like fractal seismic metamaterial with wide low-frequency band gaps on single and layered soil

Low-Profile High-Gain Wideband Multi-Resonance Microstrip-Fed Slot Antenna With Anisotropic Metasurface

Tuning of dual frequency resonance analysis of circular and rectangular patch UWB antenna used for wireless sensor networks

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