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Lopetegi, T.; Laso, M.A.G.; Gonzalo, R.; Erro, M. J.; Falcone, Francisco; Benito, D.; Garde, M. J.; Maagt, P. de; Sorolla, M.

doi:10.1023/a:1013398019677

Cited by 19 publications

(1 citation statement)

References 13 publications

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“…[19][20][21][22] Some reports have confirmed the materialization of photonic band gaps with etching in the ground plane, without modulating the width of the top side of the microstrip line. [23][24][25] The impedance (Z 0 ) and the effective dielectric constant (ε eff ) are estimated as described in Ref. 26 in terms of the width of the wide lines W w , width of the narrow lines W n , thickness t of the lines, and thickness h and dielectric constant ε r of the substrate, as shown in Fig.…”

Section: Experimental Methodsmentioning

confidence: 99%

Effect of segment length modification on localized modes in Cantor bar microstrip lines

Kitahara¹,

Suzuki²,

Miyashita³

et al. 2018

Jpn. J. Appl. Phys.

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We investigated the impurity modes in a one-dimensional fractal called Cantor bar by modifying the central and side segment lengths of the microstrip lines to control the propagation properties of the microwaves. It was confirmed, using a vector network analyzer, that there exists several localized modes in the photonic gap regions in the third-stage Cantor bar with self-similar patterns. By simulating the electrical current using the method of moments, the microwaves were found to localize in either the central segment area or in both the end areas of the fractal pattern. The length modification of the segment where the microwave is localized led to large frequency shifts of the localized modes and hardly influenced the gap region. The quality factors of the modes localized in the central area are quite affected by the length modifications of both the first and second segments.

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Section: Experimental Methodsmentioning

confidence: 99%

Effect of segment length modification on localized modes in Cantor bar microstrip lines

Kitahara¹,

Suzuki²,

Miyashita³

et al. 2018

Jpn. J. Appl. Phys.

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Novel synthesis technique for microwave circuits based on inverse scattering: Efficient algorithm implementation and application

Chudzik

Arnedo

Arregui

et al. 2011

Int J RF and Microwave Comp Aid Eng

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In this article, an efficient algorithm implementation is presented for the synthesis of microwave circuits with arbitrary frequency responses. A comprehensive theory development is included starting from the formalism of the coupled-mode theory to obtain an exact series solution for the inverse scattering problem. A final algorithm in pseudocode is available in this article together with graphical diagrams to provide a straightforward implementation for the interested reader showing its feasibility for parallel computing. As an example, a design of a matched filter for broadband communications is presented along with the operational insight of the applied method, the influence of the auxiliary parameters, and the comparison between target frequency responses, simulations, and measurements. This application in microstrip technology is enclosed as an instance of the versatility of our synthesis technique and the accuracy of the presented algorithm.

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Improved performance of EBGs on a co‐planar transmission line using tapered distribution

Padhi

2004

Micro & Optical Tech Letters

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Conventional electromagnetic crystals or electromagnetic bandgaps (EBGs) with uniform distribution show spurious ripples in the pass band and poor stop‐band responses. This paper presents a detailed theoretical investigation of the performance of EBGs on a uniplanar transmission line using tapered distribution. The nonuniform size of the EBGs is used to improve the ripple height, 20‐dB rejection band, and selectivity of the filter over the pass‐band and stop‐band regions. The calculated S parameters exhibit significant improvement in ripple height and rejection bandwidth, as compared with the conventional EBG‐assisted coplanar transmission line. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 42: 128–131, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20228

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Untitled

Cited by 19 publications

References 13 publications

Effect of segment length modification on localized modes in Cantor bar microstrip lines

Effect of segment length modification on localized modes in Cantor bar microstrip lines

Novel synthesis technique for microwave circuits based on inverse scattering: Efficient algorithm implementation and application

Improved performance of EBGs on a co‐planar transmission line using tapered distribution

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