Characteristics and Applications of a Novel Compact Spiral Electromagnetic Band-Gap (EBG) Structure

Zheng, Qiu-Rong; Lin, Baoqin; Fu, Yunqi; Yuan, Naichang

doi:10.1163/156939307779378844

Cited by 43 publications

(17 citation statements)

References 11 publications

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“…On the other hand, a composite consisting of ferroelectric inclusions in a polymer matrix can provide a flexible sheet with tunable permittivity and at the same time maintain the tunability properties of the ceramic. Tunable composites can be applied in the design of, for example, dual band antennas [10], tunable electromagnetic band-gap (EBG) structures [11], or tunable split ring resonators [12].…”

Section: Introductionmentioning

confidence: 99%

Tunability of Granular Ferroelectric Dielectric Composites

Jylhä¹,

Sihvola²

2008

PIER

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Abstract-Electrical tunability of a composite consisting of small ferroelectric spheres randomly dispersed into a dielectric background is studied. A new method to calculate the effective permittivity of such a nonlinear composite is introduced. The method is based on the Bruggeman effective medium theory and a specific model for the nonlinear permittivity of the ferrite. The resulting tunability (defined as a measure of the change in the permittivity due to the bias field) is a continuous function of the volume fraction of the ferroelectric material phase in the composite. As an example, SrTiO 3 is studied with two different nontunable background materials.

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Section: Introductionmentioning

confidence: 99%

Tunability of Granular Ferroelectric Dielectric Composites

Jylhä¹,

Sihvola²

2008

PIER

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“…We have known that, there is a problem with most of proposed HIS structures because they present a shift of the resonant frequency versus the incidence angle [22]. But in comparison with conventional antenna type placed above a metal ground plane, the antenna placed above the HIS has smoother radiation profile, less power wasted in the backward direction, better return loss, and higher gain and directivity [23,24]. In simulations, the characteristics of U-slot patch antennas were obtained by using the Ansoft high-frequency structure simulator (HFSS).…”

Section: Introductionmentioning

confidence: 99%

Bandwidth Enhancement of a U-Slot Patch Antenna Using Embedded HIS Structure

Agrawal¹,

Sharma²,

Singhal³

2012

Advanced Computational Techniques in Electromagnetics

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This paper proposes a new generation of antenna that applies metamaterial as a base construction. With the use of dual band high impedance surface (HIS) structures, the bandwidth, return loss, and gain of U-slot patch antenna is improved at resonant frequencies 2.24 GHz and 5.8 GHz.The proposed new modified U-slot antenna has dual band impedance bandwidth from about 2.1886 to 2.27 GHz and 5.6149 to 7.2259 GHz. From the simulation result it was found that the upper frequency band of the proposed antenna lies in the band of 5.725∼5.825 GHz regulated by IEEE 802.11a (upper band) and can be used for bluetooth and WLAN applications. We perform this analysis on structures which composed of rectangular lattice patches periodic arrangements. All the dimensions and shapes of the unit cell geometry are optimized in order to get a broad bandwidth and high return loss. The lattice structure comprises of an array of 7×5 rectangular patches embedded in the substrate.

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“…Some new techniques, which are mostly to increase the inductance or capacitance, are utilized to reduce the resonant frequency and increase the band-gap of EBG structures [3,4]. The convoluted metal strips of EBG cell is a effective structure, which is used to improve the characteristics of EBG structures [5]. [6] shows a slotted EBG with koch structure, which has two band-gaps.…”

Section: Introductionmentioning

confidence: 99%

A Novel Multi-Band Electromagnetic Band-Gap Structure

Xie¹,

Jiao²,

Song³

et al. 2009

PIER Letters

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Abstract-In this paper, a novel multi-band EBG structure is presented. By making slots on Sievenpiper High Impedance Surface (HIS) to increase the inductance and capacitance, the resonant frequency of the EBG structure can be significantly reduced. Transmission line method is used to determine the band-gap of the EBG structure. The simulated and experimental results show that the novel EBG structure can provide multiple band-gap. This proposed EBG can be usefully applied to multiple frequency antennas and low profile antennas.

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Characteristics and Applications of a Novel Compact Spiral Electromagnetic Band-Gap (EBG) Structure

Cited by 43 publications

References 11 publications

Tunability of Granular Ferroelectric Dielectric Composites

Tunability of Granular Ferroelectric Dielectric Composites

Bandwidth Enhancement of a U-Slot Patch Antenna Using Embedded HIS Structure

A Novel Multi-Band Electromagnetic Band-Gap Structure

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