A Novel Coplanar Antenna Butterfly Structure for Portable Communication Devices: A Compact Antenna With Multioperating Bands

Abed, Amer T.

doi:10.1109/map.2020.2964524

Cited by 14 publications

(14 citation statements)

References 24 publications

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“…5. Compared with those in References 1,4,5,11,14,21,23, and the gain of the proposed antenna is above 3 dBi across all the operating bands. 6.…”

Section: Performance Comparison Of Proposed Antenna With Other Pionmentioning

confidence: 69%

“…To achieve both compact size and multiband operations, various monopole antenna designs have been investigated. [18][19][20][21][22] However, the aforementioned antennas designs are required to be integrated with chip inductor [18][19][20] chip resistor, 21 or chip capacitor. 22 Even though the use of additional chip components can easily aid in achieving good frequency tuning, impedance matching, or decoupling, it is noteworthy that the incorporation of additional chip component may result in a reduction of antenna efficiency, which is mainly due to additional power consumption by the component.…”

Section: Introductionmentioning

confidence: 99%

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Multiband , miniaturized, maze shaped antenna with an air‐gap for wireless applications

Kulkarni

Sim

2020

Int J RF Microw Comput Aided Eng

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A novel maze shaped multiband monopole antenna with a miniaturized size of only 6 × 4 × 1.6 mm 3 is proposed. To further achieving excellent radiation performances across the desired operating bands, an air-gap is set between the proposed antenna and system ground. To assess the performances of the antenna, simulations are initially carried out by loading a 1.6 mm thick nonconducting Polycarbonate material (analogous to an air-gap) between the antenna and system ground, and a simplified equivalent circuit (EC) model of the proposed antenna is also derived. The proposed antenna has excited two different resonance frequencies, in which the lower band (f L) and upper band (f U) can yield broad 10-dB impedance bandwidths of 6.5% (2.37-2.53 GHz) and 16% (5.05-5.90 GHz), respectively. Furthermore, desirable gain and radiation efficiency of 2.85 to 6.40 dBi and 57% to 85%, respectively across the two operating bands were also achieved. A practical experiment is also carried out by installing the proposed antenna into a real laptop computer (L412 Think Pad Lenovo).

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“…5. Compared with those in References 1,4,5,11,14,21,23, and the gain of the proposed antenna is above 3 dBi across all the operating bands. 6.…”

Section: Performance Comparison Of Proposed Antenna With Other Pionmentioning

confidence: 69%

Section: Introductionmentioning

confidence: 99%

Multiband , miniaturized, maze shaped antenna with an air‐gap for wireless applications

Kulkarni

Sim

2020

Int J RF Microw Comput Aided Eng

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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%

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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“…At present, modern communication networks, such as Wi-Fi, 3G, WiMAX (4G), and LTE use multiple-input and multiple-output (MIMO) antennas to improve wireless channel capacity and provide effective and high-data rates [1]. In MIMO technology, data are simultaneously transmitted and received in the same channel [1]. Many studies have designed MIMO antennas using different geometries (patch, slot, and fractal) with various types of feed, e.g., strip, coaxial, and coplanar waveguide (CPW) lines.…”

Section: Introductionmentioning

confidence: 99%

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

Abed

2019

Int. J. Microw. Wireless Technol.

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A novel multiple-input and multiple-output (MIMO) fractal antenna excited by a coplanar waveguide was investigated in this study. A novel technique was used to improve the isolation of 20 dB between the dual radiating elements by inserting a strip line into the outer edges of the ground plane. A sunflower structure was used to configure the antenna in three steps. At each step, an additional sunflower structure was added with half the size of that used in the previous step to enhance the impedance bandwidth. The measured values of envelop correlation coefficient and total active reflection coefficient indicated that the proposed MIMO antenna has high-diversity performance between radiating elements. Wide dual operating bands of 2–2.9 and 5–10 GHz were obtained, which can support different wireless communications, such as 3G, LTE (2.6 GHz), WLAN (2.4 GHz/5 GHz), WiMAX (2.4 GHz/5GHz), ISM (2.4 GHz/5 GHz), 5G (5–6 GHz), and satellite communications (6–8 GHz). The MIMO fractal antenna with a small size achieved a maximum efficiency of 85% and a peak value gain of 6 dBi, low-channel capacity loss of 0.15–0.4 b/s/Hz, and high isolation between radiating elements is suitable for portable communication devices.

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A Novel Coplanar Antenna Butterfly Structure for Portable Communication Devices: A Compact Antenna With Multioperating Bands

Cited by 14 publications

References 24 publications

Multiband , miniaturized, maze shaped antenna with an air‐gap for wireless applications

Multiband , miniaturized, maze shaped antenna with an air‐gap for wireless applications

Fractal Antennas for Wireless Communications

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

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