A Koch-Like Sided Fractal Bow-Tie Dipole Antenna

Li, Daotie; Mao, Jun‐Fa

doi:10.1109/tap.2012.2189719

Cited by 95 publications

(53 citation statements)

References 15 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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“…The curve theoretically can achieve an infinite length while the area surrounded by the curve stays the same. Therefore, this practice has recently been widely applied to achieve antenna miniaturization [8][9][10].…”

Section: Antenna Structurementioning

confidence: 99%

Design and Analysis of a Novel CPW-Fed Koch Fractal Yagi-Uda Antenna With Small Electric Length

Lin¹,

Liu²,

Ma³

2012

PIER C

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Abstract-A novel Koch fractal printed Yagi-Uda antenna fed by coplanar waveguide (CPW) is proposed and analyzed. The antenna has first-order Koch fractal monopoles, and the monopoles' ground plane acts as the ground plane of the antenna. The radiation characteristics of the antenna are simulated by CST Microwave Studio and explained by the simulated results. The antenna's currents distribution becomes more uniform after being fractal, which is conducive to increasing antenna's radiation directivity. The proposed Koch fractal Yagi-Uda antenna has an operating band of 885-913 MHz (relative bandwidth 3.1%) with the center frequency of 900 MHz. The total antenna size is 171 mm × 85 mm (0.51λ × 0.25λ) and the length in the antenna's polarization direction is only 25% of the wavelength corresponding to the center frequency. Compared to traditional Yagi-Uda antenna, the proposed antenna can achieve a 50% miniaturization effect.

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“…The parasitic directors are used to enhance the radiation in the forward end fire direction. Owing to the advantages of high gain, end-fire radiation pattern, ease-fabrication and low cost, the printed Yagi-Uda antenna has attracted much interest with many applications in radar, millimeterwave imaging, wireless communication system and etc.. As the development of wireless communication proceeding, many significant efforts have been made to design printed Yagi-Uda antenna and improve its performance for several wireless communications such as the series-fed two bowtie dipole array for enhancing the front-to-back ratio [2], the Sierpinki or Koch fractals shaped dipole elements for reduction in size [3][4][5] and dipole driver with derived sections for multiband operation [6,7].…”

Section: Introductionmentioning

confidence: 99%

A Novel Design of Folded Dipole for Broadband Printed Yagi-Uda Antenna

Wang¹,

Liu²,

Yin³

et al. 2014

PIER C

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Abstract-In this paper, a printed wideband Yagi-Uda antenna with a novel folded dipole driver is proposed. The folded dipole driver is comprised of a folded dipole and a microstrip feedline which functions as an internal balun to mainly determine its wide impedance bandwidth. With the optimized parameters, an operating band of 1.69 GHz ∼ 2.72 GHz can be obtained. Besides the folded dipole driver, the broadband printed Yagi-Uda antenna also consists of three directors and a reflector. Its wideband performance is mainly determined by the folded dipole driver, while the reflector and directors improve its performance slightly. By optimizing the geometrical parameters of the folded dipole driver, a bandwidth of 61.8% (1.53 GHz ∼ 2.93 GHz) for return loss being higher than 10 dB is achieved. The proposed printed Yagi-Uda antenna is realized on FR4 substrate with a measured operating bandwidth of 62% (1.51 GHz ∼ 2.94 GHz), a flat gain (5.6 dB ∼ 7.3 dB), more than 10 dB front-to-back ratio and lower than −15 dB cross-polarization level.

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A Koch-Like Sided Fractal Bow-Tie Dipole Antenna

Cited by 95 publications

References 15 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

Design and Analysis of a Novel CPW-Fed Koch Fractal Yagi-Uda Antenna With Small Electric Length

A Novel Design of Folded Dipole for Broadband Printed Yagi-Uda Antenna

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