Amer fractal slot antenna with quad operating bands high efficiency for wireless communications

Abed, Amer T.; Singh, Mandeep Singh Jit; Islam, Mohammad Mahfuzul

doi:10.1109/istt.2016.7918075

Cited by 8 publications

(10 citation statements)

References 7 publications

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“…There are many geometries used in designing fractal antennas such as: Fractal slot [2], Giuseppe Peano Fractal Geometries [3], Fractal loop [4], Fractal Cantor [5], Minkowski Fractal [6], Koch Fractal [7], H-Fractal [8], Sierpinski gasket arrangement [9], Fern Fractal leaf [10], Mandelbrot Fractal antenna [11], Amer fractal slot [12], Sunflower Fractal [13], Flame Fractal [14] and Butterfly Structure [15].…”

Section: Introductionmentioning

confidence: 99%

Fractal Antennas for Wireless Communications

Abed¹,

Abu-AlShaer²,

Jawad³

2020

Modern Printed-Circuit Antennas

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When the length of the antenna is less than a quarter of the wavelength of the operating frequency, good radiation properties are difficult to obtain. However, size limitations can be overcome in this case using a fractal geometry antenna. The shape is repeated in a limited size such that the total length of the antenna is increased to match, for example, half of the wavelength of the corresponding desired frequency. Many fractal geometries, e.g., the tree, Koch, Minkowski, and Hilbert fractals, are available. This chapter describes the details of designing, simulations, and experimental measurements of fractal antennas. Based on dimensional geometry in terms of desired frequency bands, the characteristics of each iteration are studied carefully to improve the process of designing the antennas. In depth, the surface current distribution is investigated and analyzed to enhance the circular polarization radiation and axial ratio bandwidth (ARBW). Both, simulation and experimental, results are discussed and compared. Two types of fractal antennas are proposed. The first proposed fractal antenna has a new structure configured via a five-stage process. The second proposed fractal antenna has a low profile, wherein the configuration of the antenna was based on three iterations.

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Section: Introductionmentioning

confidence: 99%

Fractal Antennas for Wireless Communications

Abed¹,

Abu-AlShaer²,

Jawad³

2020

Modern Printed-Circuit Antennas

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show abstract

“…To identify the problem statement, Table 1 compares some important characteristics, such as operating band, gain, efficiency, axial ratio bandwidth (ARBW), size and weak points, of the antennas described in [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]22]. Most of the previously proposed fractal antennas are linearly polarised.…”

Section: Introductionmentioning

confidence: 99%

“…Most of the previously proposed fractal antennas are linearly polarised. However, some fractal antennas have CP radiation, such as those reported in [8,9,13,15,16,18,22].…”

Section: Introductionmentioning

confidence: 99%

“…The slot antenna reported in [15] has a 26% ARBW of the 1.8-2.7 GHz notched band and generates CP radiation by using the cavitybacked slot with a meandered strip line where ARBW is sensitive to the size of the slot in the ground plate. In [16], a special fractal slot structure (Amer fractal slot) was used to design an antenna for generating CP radiation. In this antenna, an ARBW of 1.1 GHz is ∼44% of that of the second operating band at 8.4-10.9 GHz and exceeds the required ARBW for Wi-Fi and WiMAX applications.…”

Section: Introductionmentioning

confidence: 99%

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Compact fractal antenna circularly polarised radiation for Wi‐Fi and WiMAX communications

Abed

Singh

Islam

2018

IET Microwaves, Antennas & Propagation

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A novel antenna design was configured via a five‐stage process. At each stage, a new modified square patch with a half size of that used in the previous stage was added to shape the dual fractal‐structure antenna. The antenna had measured dual operating bands (2.4–2.65 and 4.8–6.4 GHz) that meet the specifications of the wireless fidelity (Wi‐Fi) and worldwide interoperability for microwave access (WiMAX) applications. The structure of the antenna was carefully analysed to achieve an axial ratio bandwidth of 3thinmathspacedB, which was ∼35% of the first operating band and 30% of the second operating band. Right‐hand and left‐hand circular polarisations were achieved by switching the inputs. The proposed antenna can be used with portable communication devices because of its compact size (18 × 18 × 0.8 mm3) and maximum efficiency (85%) compared with other related antennas.

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“…Owing to their performance and large impedance bandwidth, printed slot antennas have recently been attracting the attention of researchers for application in microwave devices. Antennas with different slot shapes, such as rectangle, ellipse, arc, heptagon, spiral, and triangle have been designed [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Dual crescent‐shaped slot antenna fed by circular polarisation into dual orthogonal strip lines

Abed

Singh

Islam

et al. 2017

IET Microwaves, Antennas & Propagation

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In this research, a novel single‐layer dual crescent‐shaped slot antenna is fed by circular polarisation into dual orthogonal strip lines for worldwide interoperability for microwave access (Wi‐Max) and wireless fidelity (Wi‐Fi) applications. One phase of the feed strip lines is shifted by 90° to enhance the circular polarisation. The surface current and the effect of changing the dimensions for the parameters are carefully studied to optimise the dimensions of the proposed antenna to satisfy the specifications of the wireless local area network/Wi‐Fi standards of (2.4– 2.484)/(5.15–5.825) GHz and Wi‐Max standards of (2.5–2.6)/(3.4–3.6)/(5.25–5.85) GHz. Several of the critical design parameters, such as return loss, radiation pattern, polarisation, axial ratio bandwidth, and gain are also investigated.

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Amer fractal slot antenna with quad operating bands high efficiency for wireless communications

Cited by 8 publications

References 7 publications

Fractal Antennas for Wireless Communications

Fractal Antennas for Wireless Communications

Compact fractal antenna circularly polarised radiation for Wi‐Fi and WiMAX communications

Dual crescent‐shaped slot antenna fed by circular polarisation into dual orthogonal strip lines

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