Hexagonal fractal multiband antenna

Tang, Tang; Wahid,

doi:10.1109/lawp.2004.829989

Cited by 26 publications

(3 citation statements)

References 3 publications

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“…The Sierpinski gasket, better known as a Sierpinski triangle, was the first fractal shape preferred for antenna design purposes [3]. In recent years, antenna researchers have tried other fractal shapes, too, including the Sierpinski carpet, Hilbert curve, hexagonal shape [4], cactus shape, and Giuseppe Peano. All these fractal geometries are intended to design low-profile and multiresonant antennas with considerable gain, often with similar radiation characteristics in their bands.…”

Section: Introductionmentioning

confidence: 99%

A novel approach of design and analysis of fractal antenna using a neurocomputational method for reconfigurable RF MEMS antenna

Chawla¹,

Khanna²

2016

Turk J Elec Eng & Comp Sci

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Abstract:A mathematical neural approach/artificial neural network (ANN) for the design of a swastika-shaped reconfigurable antenna as a feedforward side is proposed. Further design parameter calculations using the reverse procedure of the above method is presented. Neural network computational is one of the optimization methods that could be considered to improve the performance of the device. In this paper, the proposed planar antenna up to the 2nd iteration is simulated using finite element method-based HFSS software. The developed ANN algorithm method allows the optimization of the antenna to be carried out by exchanging repetitive simulations and also provides reduced processing times while still retaining great accuracy as compared to traditional mathematical formulation. The simulated S-parameter (return loss) results of the proposed antenna are verified with the ANN and show good agreement. Furthermore, for proof of concept, the above proposed antenna as well as a swastika-shaped reconfigurable antenna (2nd iteration) with radio frequency microelectromechanical system switches are fabricated and tested using a vector network analyzer. The results presented here show that the antenna works well in the frequency range of 1.5 to 6.5 GHz and resonates on multiple bands. The novelty of the approach described here offers ease of designing the process using the ANN algorithm, maintaining the miniaturization of antenna size, multiband behavior, and utility of the antenna in the mobile terminal.

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Section: Introductionmentioning

confidence: 99%

A novel approach of design and analysis of fractal antenna using a neurocomputational method for reconfigurable RF MEMS antenna

Chawla¹,

Khanna²

2016

Turk J Elec Eng & Comp Sci

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“…An antenna has multiband and ultra-band characteristics on account of being self-similarity of fractal geometry (Garg et al, 2001;Puente-Baliarda et al, 1998) whereas miniaturization of antenna is constructed with the space filling properties (Khan et al, 2008;Lule and Babij, 2004). Fractal hexagon shape has been evaluated and found appropriate for multiband usage (Gianvittorio and Rahmat-Samii, 2002;Tang and Wahid, 2004). Circular microstrip fractal antenna has also been constructed ultra wide bandwidth reduced size using self-similarity and space filling characteristics.…”

Section: Introductionmentioning

confidence: 99%

Triple Frequency Fractal Patch Structure Antenna for C Band Applications

Samsuzzaman¹,

Islam²,

Faruque

2014

RJASET

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In this study, a triple frequency fractal triangular shape microstrip patch antenna is presented for C band applications. The proposed antenna comprises of two triangular shape patches with two triangular slots and excited by a 50 Ω microstrip transmission line. The antenna excites three separate resonant modes where lower resonant mode of the antenna has an impedance bandwidth (VSWR<2) of 50 MHz (5.64-5.69 GHz), middle resonant modes impedance bandwidth 140 MHz (6.47-6.61 GHz) and the upper resonant mode impedance bandwidth of 140 . It has achieved stable radiation pattern in the operating frequency band. The proposed fractal triangular patch antenna is presented and discussed in details.

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“…A Sierpinski fractal derived from the Pascal triangle also provides multiple resonances, as proposed by Jordi Romeu [16], who explains how the number of iterations is related to the number of bands [17]. A hexagonal fractal for multiband is explained by P. W. Tang [18]. Antennas have a relative gain, which is the ratio of the radiation intensity in a particular direction to the power radiated in that direction by an isotropic antenna.…”

mentioning

confidence: 99%