Series-fed two dipole array antenna using bow-tie elements with enhanced gain and front-to-back ratio

Yeo, Junho; Lee, J.-I.

doi:10.1080/09205071.2012.706788

Cited by 11 publications

(8 citation statements)

References 13 publications

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“…Although the gain after 1.8 GHz is improved, its value is still less than 6 dBi in the frequency ranges of 1.80-2.54 GHz and 3.19-3.60 GHz. It is well-known that the frequency band moves toward the low frequency, and the gain in the low-frequency region increases, when the length of the second dipole of the DDQYA increases [10]. Based on this knowledge, the length of D 2 is increased to l 2 = 61.2 mm in order to increase the gain in the low operating frequency band, as shown in Fig.…”

Section: Antenna Geometry and Design Proceduresmentioning

confidence: 99%

Bandwidth Enhancement of Double-Dipole Quasi-Yagi Antenna Using Stepped Slotline Structure

Yeo

Lee

2016

Antennas Wirel. Propag. Lett.

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In this letter, a method to enhance the bandwidth of a double dipole quasi-Yagi antenna using a stepped slotline structure is presented. A stepped slotline with different widths is employed in the coplanar strip line connecting the two dipoles in order to improve impedance matching over a wide frequency band. In addition, two parasitic strip directors are appended to the antenna to enhance the gain in the high-frequency region. A detailed design procedure for the proposed antenna is explained, along with a performance comparison of the input impedance, voltage standing wave ratio (VSWR), and broadside gain. To demonstrate the effectiveness of the proposed design method, a prototype antenna operating in the 1.60-3.60 GHz frequency range with a gain > 6 dBi is designed and fabricated on an FR4 substrate. Experiment results show that the proposed antenna has the desired impedance characteristics with a frequency band of 1.59-3.64 GHz (78.4%) for a VSWR < 2, and a stable gain of 6.4-7.4 dBi in the 1.60-3.60 GHz frequency range. Moreover, a measured front-to-back ratio > 10 dB is obtained. Index Terms-bandwidthenhancement, stepped slotline structure, strip directors, double dipole quasi-Yagi antenna (DDQYA), mobile communications 1536-1225 (c)

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Section: Antenna Geometry and Design Proceduresmentioning

confidence: 99%

Bandwidth Enhancement of Double-Dipole Quasi-Yagi Antenna Using Stepped Slotline Structure

Yeo

Lee

2016

Antennas Wirel. Propag. Lett.

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“…We note that the lengths L r = 300 mm and L 0 = 270 mm, with the R 0 D 0 D 1 , correspond to 0.45λ 0 (λ 0 ; free space wavelength at 450 MHz) and 0.41 λ 0 , respectively. It is well known that a dipole length can be reduced by using a (half) bow‐tie‐shaped element due to the increased current path on the modified element . As such, it might be expected that the width W of the QYA can be reduced by modifying the straight strip‐type elements to the half bow‐tie‐type, as shown in Figure (d).…”

Section: Antenna Structure and Designmentioning

confidence: 99%

Broadband Compact Quasi‐Yagi Antenna for Indoor Digital Tv

Lee

Yeo

Cho

2013

Micro & Optical Tech Letters

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In this article, a design method for a broadband three‐element quasi‐Yagi antenna for indoor digital television (DTV) is presented. The antenna consists of a dipole fed by a coplanar strip (CPS) line, a rectangular patch‐type director, and a ground reflector. The transition between a microstrip (MS) feed line and the CPS line is implemented on the CPS to match the input impedance of the antenna with a 75‐Ω MS feed line. The impedance bandwidth is improved by appending a wide strip‐type patch director at a location close to the dipole driver. The antenna size is reduced by using a half bow‐tie‐shaped dipole and reflector. The antenna is designed and optimized for operation in the terrestrial DTV band (470–806 MHz) and is fabricated on an FR4 substrate. Although, the antenna size (240 mm by 200 mm) corresponds only to 0.36λ0 by 0.30λ0 (λ0; free space wavelength at 450 MHz), the experiment results show that the antenna has good performance, such as a wide impedance band of 450–848 MHz for a voltage standing wave ratio < 2, a moderate gain of 3.5–4.6 dBi, and a high front‐to‐back ratio > 10.4 dB. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:2859–2863, 2013

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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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Series-fed two dipole array antenna using bow-tie elements with enhanced gain and front-to-back ratio

Cited by 11 publications

References 13 publications

Bandwidth Enhancement of Double-Dipole Quasi-Yagi Antenna Using Stepped Slotline Structure

Bandwidth Enhancement of Double-Dipole Quasi-Yagi Antenna Using Stepped Slotline Structure

Broadband Compact Quasi‐Yagi Antenna for Indoor Digital Tv

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

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