Novel sunflower MIMO fractal antenna with low mutual coupling and dual wide operating bands

Abed, Amer T.

doi:10.1017/s1759078719001375

Cited by 18 publications

(11 citation statements)

References 32 publications

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“…Length of the upper arm ¼ 0:5X þ 0:3X þ 0:1X þ 0:12X þ 0:34X ¼ 1:36X (13) Length of left arm ¼ 0:34X þ 0:17X þ 0:1X þ 0:22X þ 0:38X ¼ 1:21X (14) Length of bottom arm ¼ 0:4X þ 0:13X þ 0:1X þ 0:17X þ 0:47X ¼ 1:27X (15) Length of right arm ¼ 0:44X þ 0:1X þ 0:1X þ 0:13X þ 0:52X ¼ 1:29X (16) Thus, the total length of meandered ring equals 5.13X. The length of meandered ring increases by a factor of 1.28 compared with the length of the square ring of the same size in the first iteration.…”

Section: Antenna Designmentioning

confidence: 99%

“…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%

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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: Antenna Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fractal Antennas for Wireless Communications

Abed¹,

Abu-AlShaer²,

Jawad³

2020

Modern Printed-Circuit Antennas

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“…Amer fractal slot loaded antenna has been designed by Adeb et al 44 for 3G, LTE (4G), WLAN, WiMAX, ISM, and 5G communications. Whereas, a novel sunflower-shaped multipleinput and multiple-output (MIMO) FA has been investigated by Adeb 45 with low mutual coupling and dual operational frequency bands. The distinct fractal geometries have been used by the researchers to design the antenna useful for 5G applications.…”

Section: Introductionmentioning

confidence: 99%

Comparative analysis of hybrid fractal antennas: A review

Sharma

Bhatia

2021

Int J RF Microw Comput Aided Eng

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The comprehensive review of hybrid fractal antenna (HFA) has been presented in this article. Distinguished researchers have designed, analyzed, and investigated numerous types of HFA's as per the requirement of the market. Firstly, it gives introduction about the fractal antennas (FAs) along with the need of integration of the fractal geometries then research motivation. The extensive literature survey has been divided into three different parts as, fusion of same type of fractal geometries, amalgamation of two distinct fractal geometries and concoction of three different fractal geometries, further, the comparative analysis among these HFA's has been made on the basis of their size, geometries used for designing, number of resonant frequency bands, gain, bandwidth, radiation efficiency, circular polarization, and their applications. The juxtaposition among different HFA's has also been delineated in tabular form for more limpidity along with the findings of individual research article. The challenges faced by researchers while designing the antennas are also being portrayed in this article. This review may be supportive for the novices to carry out their research on HFA as such type of comparative analysis on HFA's is not existing in the open state of art literature as per best of authors knowledge.

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“…In Reference 17, a 41 × 99.4 mm 2 aperture-coupled-fed complementary Sierpinski gasket fractal array integrated with two modified complementary Archimedean spiral-shaped DGS is reported to cover a wide operational range from 4.3 to 11.6 GHz (91.8% FBW) with S 21 /S 12 ≤ −15.8 dB and ECC ≤0.007. All the aforementioned fractal MIMO antennas [12][13][14][15][16][17] occupy a large surface area with a low degree of inter-port isolation, therefore, they cannot be considered as a good choice for the implementation in the modern portable electronic gadgets, functioning in a highly scattered surrounding. Also, some of the reported MIMO antennas 16,17 covers the frequency band outside the FCC's allocated UWB band, which can further give rise to interference problems.…”

Section: Introductionmentioning

confidence: 99%

“…All the aforementioned fractal MIMO antennas [12][13][14][15][16][17] occupy a large surface area with a low degree of inter-port isolation, therefore, they cannot be considered as a good choice for the implementation in the modern portable electronic gadgets, functioning in a highly scattered surrounding. Also, some of the reported MIMO antennas 16,17 covers the frequency band outside the FCC's allocated UWB band, which can further give rise to interference problems. Table 1 presents the shortcomings of the formerly investigated UWB-MIMO antennas as compared to the proposed fractal MIMO antenna.…”

Section: Introductionmentioning

confidence: 99%

Computational analysis of a dual‐port semi‐circular patch antenna combined with Koch curve fractals for ultra‐wideband systems

Sohi

Kaur

2021

Engineering Reports

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This paper presents a two-port microstrip-fed semi-circular patch antenna integrated with Koch curve fractals and common ground with defected ground structure for the effective implementation in handheld ultra-wideband (UWB) systems. The proposed array is engraved on a 1.57 mm thick FR-4 substrate with an overall array size of 30.5 × 47 × 1.64 mm 3 . The parametric analysis of the proposed array indicates that the two optimized Koch curve fractal (second iteration order) radiators (upper substrate layer) provides an optimum matching performance in a wide operational band (4.395-10.184 GHz, 79.4%) and minimizes the patch area by 41.2% as compared to the conventional circular patch. To realize good port-to-port isolation (S 21 /S 12 ≤ −16.8 dB), the reduced ground is slotted and incorporated with a funnel-shaped decoupling structure at the center. The prototype of the proposed array is fabricated and experimentally tested to justify the simulated S-parameter results. All diversity metrics like envelope correlation coefficient, diversity gain (DG), mean effective gain, channel capacity loss, and total active reflection coefficient lie within their acceptable limits which affirm a high signal-to-noise ratio and the proficiency of the proposed array in the development of high data-rate UWB communication devices. K E Y W O R D Sdefected ground structure (DGS), Koch curve fractal, multiple-input multiple-output (MIMO), ultra-wideband (UWB)This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

show abstract

Novel sunflower MIMO fractal antenna with low mutual coupling and dual wide operating bands

Cited by 18 publications

References 32 publications

Fractal Antennas for Wireless Communications

Fractal Antennas for Wireless Communications

Comparative analysis of hybrid fractal antennas: A review

Computational analysis of a dual‐port semi‐circular patch antenna combined with Koch curve fractals for ultra‐wideband systems

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