Miniaturised wideband folded bow-tie antenna

Tanaka, Shingo; Nagatoshi, Mio; Kim, Y.; Morishita, H.; Horiuchi, Shuma; Narieda, Shusuke; Atsumi, Y.

doi:10.1049/el.2009.3399

Cited by 9 publications

(3 citation statements)

References 4 publications

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“…By introducing the L-shaped coupling feed and the tuning stub to improve the impedance characteristics of the lower band and the upper band, respectively, the proposed antenna can achieve a wide operating bandwidth from 1.38 GHz to 3.14 GHz (about 77.8%) for VSWR 2. In particular, the size of the antenna is reduced by connecting the two folded elements to the patches of the bowtie dipole [11]. Owing to its wide bandwidth and compact dimension, the proposed antenna is very suitable for the recent indoor base station wireless communication.…”

Section: Introductionmentioning

confidence: 99%

Wideband bowtie antenna with inverted L -shaped coupling feed and tuning stubs for indoor base station applications

Zhang

Zuo

Zhao

et al. 2015

JAE

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The paper proposes a wideband bowtie antenna for indoor base station applications. By using the inverted L-shaped coupling feed structure, the impedance bandwidth of the lower band is improved; while using the four tuning stubs, the upper band is enhanced. Thus, a wide impedance bandwidth of about 77.8% (VSWR 2) ranging from 1.38 to 3.14 GHz is obtained. In addition, by connecting two folded elements to the patches of the bowtie dipole, the compact dimensions of the antenna can be achieved. It also provides stable peak gain, unidirectional radiation patterns and low cross-polarization over the whole operating band. Owing to these good performances, the proposed antenna is very suitable for the recent indoor base station wireless communication services such as 3G, WiFi, WiMax, Bluetooth and LTE applications, etc.

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Section: Introductionmentioning

confidence: 99%

Wideband bowtie antenna with inverted L -shaped coupling feed and tuning stubs for indoor base station applications

Zhang

Zuo

Zhao

et al. 2015

JAE

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show abstract

“…Using the Γ‐shaped strip feed and the tuning stub to effectively improve the impendence matching, the proposed antenna can achieve an operating BW of about 58.6% ranging from 1.58–2.89 GHz (VSWR ≤ 1.5). In particular, compact dimension of the antenna is also obtained by the two folded elements connecting the patches of the bowtie dipole . With this compact dimension and the wideband characteristic, it is an excellent candidate for the recent wireless communication services for the indoor‐base station such as 3G, WiFi, WiMax, Bluetooth, and LTE, and so on.…”

Section: Introductionmentioning

confidence: 99%

Wideband Folded Bowtie Antenna With Γ‐Shaped Strip Feed and Tuning Stubs

Zhang

Zuo

Zhao

2013

Micro & Optical Tech Letters

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The wideband performance of a bowtie antenna with Γ‐shaped strip feed and tuning stubs is presented. Besides two folded elements connecting the patches of the bowtie dipole for a compact dimension, the Γ‐shaped strip feed structure and the four tuning stubs to effectively improve the impendence matching can be used for bandwidth enhancement. A wideband impedance characteristics of about 58.6% for VSWR ≤ 1.5 ranging from 1.58–2.89 GHz is obtained and the stable peak gain of around 9 dBi, unidirectional radiation patterns and low cross‐polarization over the whole operating band are also achieved. It is very suitable for the recent wireless communication services for the indoor‐base station such as 3G, WiFi, WiMax, Bluetooth, and LTE/2.5 applications, and so on. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:2145–2149, 2013

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“…Using the C-shaped strip feed and the tuning stub to effectively improve the impendence matching, the proposed antenna can achieve an operating BW of about 58.6% ranging from 1.58-2.89 GHz (VSWR 1.5). In particular, compact dimension of the antenna is also obtained by the two folded elements connecting the patches of the bowtie dipole [11]. With this compact dimension and the wideband characteristic, it is an excellent candidate for the recent wireless communication services for the indoor-base station such as 3G, WiFi, WiMax, Bluetooth, and LTE, and so on.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of a Circulator Using Yig Thin Film With a Coplanar Structure

Zahwe¹,

Sauviac²,

Samad³

et al. 2009

PIER C

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resonance effects also play a part. Having the casing would also be a more practical setup as it allows external magnets to be mounted, which are necessary to provide the magnetic bias, H o , out of the disk plane. Figures 1(a)-1(c) show the configurations of the proposed circulator. RESULTS AND DISCUSSIONAnsoft HFSS, which uses the finite element method, is used for the simulation of our CPW circulator design. In the simulation design, the casing and conductors used are assumed to be copper. The uniform applied magnetic bias perpendicular to the YIG disk plane is 450,000 A/m, and the design parameters are given in Table 1. The dimensions of the CPW are chosen such that its characteristic impedance is 50 X, so as to ensure impedance matching to most microwave circuits and probes. The YIG disk of thickness 0.5 mm is taken to have a dielectric constant of 15.3, saturation magnetization of 1750 G, loss tangent of 0.0002, and ferromagnetic linewidth of 50 Oe.From the simulation results in Figure 2, maximum circulation is observed to occur at 9.88 GHz, with the corresponding insertion loss of 20.37 dB, return loss of 218.5 dB, and isolation of 216.8 dB. Bosma's theory for a stripline circulator with the same YIG disk radius predicts circulation at 10 GHz. The fact that our CPW circulator has a maximum circulation frequency close to this value shows that the addition of the metallization above YIG disk is able to circumvent the field mismatch between our CPW structure and the stripline structure. Indeed, the results show the viability of implementing such a CPW circulator due to the good nonreciprocal performance and design simplicity. CONCLUSIONA circulator using pure CPW transmission lines has been designed, with HFSS simulation showing good nonreciprocal performance. Our CPW circulator design is compact, easily patterned using modern lithography techniques at low cost, and compatible with MMICs. This CPW circulator can be useful for many microwave applications, especially acting as passive components in monolithic MMIC.ABSTRACT: The wideband performance of a bowtie antenna with C-shaped strip feed and tuning stubs is presented. Besides two folded elements connecting the patches of the bowtie dipole for a compact dimension, the C-shaped strip feed structure and the four tuning stubs to effectively improve the impendence matching can be used for bandwidth enhancement. A wideband impedance characteristics of about 58.6% for VSWR 1.5 ranging from 1.58-2.89 GHz is obtained and the stable peak gain of around 9 dBi, unidirectional radiation patterns and low crosspolarization over the whole operating band are also achieved. It is very suitable for the recent wireless communication services for the indoor-base station such as 3G, WiFi, WiMax, Bluetooth, and LTE/2.5 applications, and so on.ABSTRACT: Two planar elliptical ultra-wideband (UWB) monopole antennas with total efficiency greater than 97% in the UWB are investigated. One has attractive feature and an excellent impedance matching with return loss lower than 222 dB in ...

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Miniaturised wideband folded bow-tie antenna

Cited by 9 publications

References 4 publications

Wideband bowtie antenna with inverted L -shaped coupling feed and tuning stubs for indoor base station applications

Wideband bowtie antenna with inverted L -shaped coupling feed and tuning stubs for indoor base station applications

Wideband Folded Bowtie Antenna With Γ‐Shaped Strip Feed and Tuning Stubs

Numerical Study of a Circulator Using Yig Thin Film With a Coplanar Structure

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