The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
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The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
Este artigo apresenta uma metagração retrodiretiva conformada com capacidade de operação em ângulo multi-azimutal. Primeiro, uma metagrade plana composta por uma matriz periódica de elementos de remendo retangulares únicos, substratos empilhados em duas camadas e um plano de terra é implementada para obter retrorreflexão unidirecional em um ângulo específico. O ângulo de elevação da retrorreflexão é manipulado ajustando com precisão o valor do período. Para controlar o acoplamento de energia ao modo retrodiretivo, as dimensões do comprimento e largura do remendo retangular são investigadas sob o efeito da alteração da espessura do substrato. Três valores de comprimento, largura e espessura são então escolhidos para obter uma alta eficiência de potência de retrorreflexão. Em seguida, para criar um design conforme operando simultaneamente em vários ângulos azimutais, o conjunto de patches retangulares usando uma camada guia ultrafina flexível é conformado a um substrato cilíndrico dielétrico apoiado por um plano de aterramento condutor elétrico perfeito. Além disso, para otimizar ainda mais a eficiência da retrorreflexão, duas placas metálicas circulares são adicionadas nas duas extremidades do substrato cilíndrico para eliminar a reflexão especular dentro do espaço do cilindro. A seção transversal do radar medida mostra uma eficiência energética da metagração retrodiretiva de aproximadamente 91% e 93% para ângulo de elevação retrodirecionado de 30° nos ângulos azimutais de 0° e 90°, respectivamente, a 5.8GHz.
The Viet HOANG
Hongik University
Jeong-Hae LEE
Hongik University
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The Viet HOANG, Jeong-Hae LEE, "Efficient Conformal Retrodirective Metagrating Operating Simultaneously at Multiple Azimuthal Angles" in IEICE TRANSACTIONS on Communications,
vol. E104-B, no. 1, pp. 73-79, January 2021, doi: 10.1587/transcom.2020EBP3037.
Abstract: This paper presents a conformal retrodirective metagrating with multi-azimuthal-angle operating ability. First, a flat metagrating composed of a periodic array of single rectangular patch elements, two-layer stacked substrates, and a ground plane is implemented to achieve one-directional retroreflection at a specific angle. The elevation angle of the retroreflection is manipulated by precisely tuning the value of the period. To control the energy coupling to the retrodirective mode, the dimensions of the length and width of the rectangular patch are investigated under the effect of changing the substrate thickness. Three values of the length, width, and thickness are then chosen to obtain a high retroreflection power efficiency. Next, to create a conformal design operating simultaneously at multiple azimuthal angles, the rectangular patch array using a flexible ultra-thin guiding layer is conformed to a dielectric cylindrical substrate backed by a perfect electric conductor ground plane. Furthermore, to further optimize the retroreflection efficiency, two circular metallic plates are added at the two ends of the cylindrical substrate to eliminate the specular reflection inside the space of the cylinder. The measured radar cross-section shows a power efficiency of the retrodirective metagrating of approximately 91% and 93% for 30° retrodirected elevation angle at the azimuthal angles of 0° and 90°, respectively, at 5.8GHz.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.2020EBP3037/_p
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@ARTICLE{e104-b_1_73,
author={The Viet HOANG, Jeong-Hae LEE, },
journal={IEICE TRANSACTIONS on Communications},
title={Efficient Conformal Retrodirective Metagrating Operating Simultaneously at Multiple Azimuthal Angles},
year={2021},
volume={E104-B},
number={1},
pages={73-79},
abstract={This paper presents a conformal retrodirective metagrating with multi-azimuthal-angle operating ability. First, a flat metagrating composed of a periodic array of single rectangular patch elements, two-layer stacked substrates, and a ground plane is implemented to achieve one-directional retroreflection at a specific angle. The elevation angle of the retroreflection is manipulated by precisely tuning the value of the period. To control the energy coupling to the retrodirective mode, the dimensions of the length and width of the rectangular patch are investigated under the effect of changing the substrate thickness. Three values of the length, width, and thickness are then chosen to obtain a high retroreflection power efficiency. Next, to create a conformal design operating simultaneously at multiple azimuthal angles, the rectangular patch array using a flexible ultra-thin guiding layer is conformed to a dielectric cylindrical substrate backed by a perfect electric conductor ground plane. Furthermore, to further optimize the retroreflection efficiency, two circular metallic plates are added at the two ends of the cylindrical substrate to eliminate the specular reflection inside the space of the cylinder. The measured radar cross-section shows a power efficiency of the retrodirective metagrating of approximately 91% and 93% for 30° retrodirected elevation angle at the azimuthal angles of 0° and 90°, respectively, at 5.8GHz.},
keywords={},
doi={10.1587/transcom.2020EBP3037},
ISSN={1745-1345},
month={January},}
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TY - JOUR
TI - Efficient Conformal Retrodirective Metagrating Operating Simultaneously at Multiple Azimuthal Angles
T2 - IEICE TRANSACTIONS on Communications
SP - 73
EP - 79
AU - The Viet HOANG
AU - Jeong-Hae LEE
PY - 2021
DO - 10.1587/transcom.2020EBP3037
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E104-B
IS - 1
JA - IEICE TRANSACTIONS on Communications
Y1 - January 2021
AB - This paper presents a conformal retrodirective metagrating with multi-azimuthal-angle operating ability. First, a flat metagrating composed of a periodic array of single rectangular patch elements, two-layer stacked substrates, and a ground plane is implemented to achieve one-directional retroreflection at a specific angle. The elevation angle of the retroreflection is manipulated by precisely tuning the value of the period. To control the energy coupling to the retrodirective mode, the dimensions of the length and width of the rectangular patch are investigated under the effect of changing the substrate thickness. Three values of the length, width, and thickness are then chosen to obtain a high retroreflection power efficiency. Next, to create a conformal design operating simultaneously at multiple azimuthal angles, the rectangular patch array using a flexible ultra-thin guiding layer is conformed to a dielectric cylindrical substrate backed by a perfect electric conductor ground plane. Furthermore, to further optimize the retroreflection efficiency, two circular metallic plates are added at the two ends of the cylindrical substrate to eliminate the specular reflection inside the space of the cylinder. The measured radar cross-section shows a power efficiency of the retrodirective metagrating of approximately 91% and 93% for 30° retrodirected elevation angle at the azimuthal angles of 0° and 90°, respectively, at 5.8GHz.
ER -