On the Use of Dimension and Lacunarity for Comparing the Resonant Behavior of Convoluted Wire Antennas

Comisso, M.

doi:10.2528/pier09082505

Cited by 16 publications

(11 citation statements)

References 17 publications

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“…Nowadays, various forms of these fractal structures are used in microstrip antennas and filters [16][17][18]. Bow-tie dipole and monopole antenna with Koch shape fractal has been designed for multi-band and miniaturization [19][20][21]. In addition, Fractal-Shaped Patch-Slot configuration used in miniaturized reflect-array unit cell and Minkowski fractal are compared for different steps [22].…”

Section: Introductionmentioning

confidence: 99%

A Dual Band Fractal Slot Antenna Loaded With Jerusalem Crosses for Wireless and Wimax Communications

Sedghi¹,

Naser‐Moghadasi²,

Zarrabi³

2016

PIER Letters

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Abstract-In this paper, a combination of the Jerusalem cross (JC) as a fractal load and fractal Minkowski slot antenna for dual-band application is investigated. The prototype slot antenna has a Minkowski fractal formation with four Jerusalem cross (JC) loads to achieve dual-band application with compact size to improve the bandwidth. A T-shaped feed line is implemented in the final modeled antenna. The fabricated antenna has a bi-directional pattern with sufficient bandwidth at 2.4-3.1 GHz and 5.1-5.9 GHz with VSWR < 2 for Wi-Fi, WiMAX, Bluetooth application as well as an IEEE WLAN protocol with a gain of 5-6 dBi, respectively. The size of the prototype patch antenna is 40×40 mm 2 , and the antenna is designed and fabricated on an FR-4 low cost substrate with ε r = 4.4 and thickness of 1.6 mm. It is simulated by HFSS full wave software. In addition, the VSWR, pattern and axial ratio of experimental results are presented and compared with simulation models. As a result, improvements of the Jerusalem cross compared with conventional cross have been achieved with some parameter tuning to improve the bandwidth.

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Section: Introductionmentioning

confidence: 99%

A Dual Band Fractal Slot Antenna Loaded With Jerusalem Crosses for Wireless and Wimax Communications

Sedghi¹,

Naser‐Moghadasi²,

Zarrabi³

2016

PIER Letters

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“…Then gliding box algorithm is used to calculate the lacunarity of each geometry, including Von Koch. To obviate the effect of box size, the box size weighted average is calculated as suggested in [25,26] and plotted in Fig. 6.…”

Section: Results and Analysismentioning

confidence: 99%

“…Then the results are discussed from the point of view of miniaturization and the expressions are developed to predict maximum miniaturization possible and the resonant frequency achieved with various iterations. The proposed fractals are also analysed by computing their lacunarity dimensions [25,26]. This gives comprehensive information about the proposed fractal geometry.…”

Section: Introductionmentioning

confidence: 99%

Generation, Application and Analysis of a Novel Family of M-Segment Quadratic Fractal Curves to Antennas

Khokle¹

2016

PIER C

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Abstract-A novel family of fractal curves is proposed which provides the designer a systematic way of miniaturizing the microwave components with the freedom of choosing among form factor, design complexity and achieved miniaturization. The proposed fractal curve is characterized by two integer values m and n. The m value determines the form factor of the fractal while n value governs the iteration number. The equations governing the geometry of fractals are also presented. The proposed fractal is characterized for miniaturization by designing a printed monopole antenna for various values of m and n. The results from the full wave simulations and experiments are analysed and explained. The effect of fractal on reducing the resonant frequency is quantified by an equation based on its physical interpretation. Based on this analysis, saturation point for miniaturization is established. The curves being symmetric around a straight line, distortionless radiation patterns are seen.

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“…Recently, the design of miniaturized fractal antennas capable of providing multiple resonant frequencies has received much attention due to ease of installation on vehicles and aerodynamic compatibility [5]. Several research papers have proposed novel antenna design techniques based on fractal geometry [6][7][8], showing how proper selection of fractal geometry can help reduce the overall antenna size and, simultaneously, ensure multi-band operation. Fractals are set of geometrical structures featuring two main properties -self-similarity and space filling [9].…”

Section: Introductionmentioning

confidence: 99%

A Novel Tri-Band Hexagonal Microstrip Patch Antenna Using Modified Sierpinski Fractal for Vehicular Communication

Mondal¹,

Samanta²,

Ghatak³

et al. 2015

PIER C

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Abstract-The present paper analyses and documents the merits of incorporating fractal design in microstrip antenna intended to be mounted on and integrated into the design of smart vehicles. A novel design is proposed for a compact tri-band hexagonal microstrip antenna to be integrated with the body of a smart vehicle for short range communication purpose in an Intelligent Transport System (ITS). This antenna can be used at 1.575 GHz of GPS L1 band for vehicle to roadside communication, at 3.71 GHz of mobile WiMAX band (IEEE 802.16e-2005) for blind spot detection and at 5.9 GHz of DSRC band (IEEE 802.11p) for vehicle to vehicle communication. At 3.71 GHz, the two major lobes of the antenna radiation beam, tilted by 35 • on both sides from its broadside direction, help the vehicle to detect blind spots efficiently. The largest dimension of the proposed antenna corresponds to the lowest resonating frequency, 1.575 GHz. Compared to the conventional hexagonal patch, the modified Sierpinski fractal proposed herein reduces the overall area, at 1.575 GHz, by 75%, with 5.2 dBi gain. In comparison with other popular fractals, the proposed fractal structure achieves demonstrably better antenna miniaturization. When the antenna is mounted on the vehicle, considered an electromagnetically larger object, the simulated and on-vehicle experimental results show antenna gains of more than 5.5 dBi at 1.575 GHz, 8 dBi at 3.71 GHz and 9 dBi at 5.9 GHz in the desired direction with negligible amount of electromagnetic interference inside the car.

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On the Use of Dimension and Lacunarity for Comparing the Resonant Behavior of Convoluted Wire Antennas

Cited by 16 publications

References 17 publications

A Dual Band Fractal Slot Antenna Loaded With Jerusalem Crosses for Wireless and Wimax Communications

A Dual Band Fractal Slot Antenna Loaded With Jerusalem Crosses for Wireless and Wimax Communications

Generation, Application and Analysis of a Novel Family of M-Segment Quadratic Fractal Curves to Antennas

A Novel Tri-Band Hexagonal Microstrip Patch Antenna Using Modified Sierpinski Fractal for Vehicular Communication

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