Metamaterials: Reshape and Rethink

Liu, Ruopeng; Ji, Chunlin; Zhao, Zhiqin; Zhou, Tian

doi:10.15302/j-eng-2015036

Cited by 40 publications

(23 citation statements)

References 42 publications

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“…The intrinsic 3D characteristic of the metamaterial structures is embedded in the homogeneous equivalent properties, allowing this simplification. Due to the complex nature of metamaterials, 3D finite element models are limited to small portions of the sample or basically the periodic unit cell [13,14,[16][17][18]. In applications where the sample is much larger than the wavelengths and oddly shaped, a homogenized equivalent would make the simulation much simpler.…”

Section: Methodsmentioning

confidence: 99%

Using Homogeneous Equivalent Parameters in Finite Element Models of Curved Metamaterial Structures

Mattish¹,

Alves²,

Grbovic³

2018

PIER Letters

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We report on the experimental verification of the employment of equivalent parameters in a 2D finite element model to describe absorptivity of curve-shaped, large-scale metamaterial structures. Equivalent homogeneous optical parameters were retrieved from experimental measurements of flat metamaterial sheets with square resonators of 8 and 9 mm and used in a 2D FE model to obtain the absorptivity of curved structures with similar metamaterial unit cells. The curved structures were experimentally characterized and showed good agreement with the model. The tremendous simplification made possible by simulating complex structures as homogeneous materials makes the method very attractive for designing large-scale electromagnetic shields and absorbers.

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Section: Methodsmentioning

confidence: 99%

Using Homogeneous Equivalent Parameters in Finite Element Models of Curved Metamaterial Structures

Mattish¹,

Alves²,

Grbovic³

2018

PIER Letters

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“…The relevant theories of basic forms of antennas are available in open literature . It is further classified into high performance antennas, metamaterial antennas, CP antennas, reconfigurable antennas, and array antennas . It is a strong belief that prerequisites need to be cleared before using the implicit technique in proposed antenna models.…”

Section: Microwave Antennas In Rf Energy Harvesting Systemsmentioning

confidence: 99%

“…[107][108][109] The relevant theories of basic forms of antennas are available in open literature. 36,65,70,75,80,85,91,96,101,104,107 It is further classified into high performance antennas, [110][111][112][113]159 metamaterial antennas, [114][115][116][117][160][161][162] CP antennas, [118][119][120][121][122][123][124][125][126][127][164][165][166][167][168][169][170][171][172][173][174][175][176][177] reconfigurable antennas,…”

Section: Microwave Antennas In Rf Energy Harvesting Systemsmentioning

confidence: 99%

Microwave antennas—An intrinsic part of RF energy harvesting systems: A contingent study about its design methodologies and state‐of‐art technologies in current scenario

Behera

Meher

Mishra

2020

Int J RF Microw Comput Aided Eng

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With the significant rise of low power embedded devices in various applications of both consumer and commercial usage, the surge for continuous power requirements has initiated promising research toward alternative sources of energy. It includes the domain of wireless power transmission, internet‐of‐things, wireless sensor nodes, machine‐to‐machine, and radio frequency identification. Thus, the overall scope of this review article is to witness microwave antennas and its implementation in RF energy harvesting system through ambient RF signals. For this reason, unified understanding of classical electromagnetism is needed; beginning with the fundamentals of RF transmission and the exploration of concepts such as Fraunhofer's Distance and Friis Transmission Equation. It is followed up by the analogy of dependency of parameters like circuit build‐up, conversion efficiencies and amount of power harvested, which is quite crucial from the rectifier point‐of‐view. For better improvisement in RF energy harvesting systems, five different cases of monopole antennas are explored with reflector surfaces such as PEC (perfect electrical conductor) and AMC (artificial magnetic conductor) integrated with the rectifier circuit. Implementation with wide diversity has proposed a generalized solution for achieving tradeoffs: polarization and pattern diversity with consistent system efficiency; leads to clean and sustainable energy for low power‐embedded devices.

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“…Many private companies such as ViaSat, Space Engineering, Thales Alenia Space or Hispasat, collaborate with public entities in the achievement of this objective. Some featured examples can be found in [16]- [18]. In [16], a dual offset Ku-band reflector antenna on board high-speed trains and ground vehicles was presented.…”

Section: Parabolic Reflectorsmentioning

confidence: 99%

“…1.4. Furthermore, a recent contribution presented in [18] uses metamaterials to obtain a reflector with a planar shape that is only 2 mm thick. Fig.…”

Section: Parabolic Reflectorsmentioning

confidence: 99%

Gap Waveguide Array Antennas and Corporate-Feed Networks for mm-Wave band Applications

Rocher¹

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Just when you think you know all the answers, the universe changes all the questions." iv a todo el mundo. En cualquier minuto y siempre sin un pero. Es un placer haber viajado contigo, compartido aventuras en Londres, Paris, Boston...y haber aprendido tanto de ti. También a Nora y María, las chicas de la sala del GRE. Vosotras sois parte imprescindible de este trabajo, hemos crecido juntos. Muchas gracias por todos los momentos de distensión, las risas, por apoyarme con la tesis y también con el teatro.Mariano, Eva, Vicent M., Marta, Lorenzo, Juan, Felipe. Conoceros aún más y aprender de vosotros ha sido un privilegio. Gracias, además, por haberme permitido compartir docencia con vosotros. Han sido momentos para crecer tanto profesional como vitalmente.Gente que va y viene. Que de algún modo siempre está. Marc, Cristina, Alexia, Jaime, por supuesto Toni B. y Tomás. Que suerte haberos conocido y que pena no haber compartido más tiempo. Sois personas brillantes y con mucha luz, ojalá pudiera robaros algo de ese magnetismo que transmitís, y ojalá, de la manera que sea, volvamos a encontrarnos. A la familia de Ecuador: Fernando, Diana, Carlos, Daniel, Anibal. A la de Marruecos: Zakaria, Hamza, Yousra. A la de Argentina: Juan Pablo, Alberto, Guillermo y tantos otros que seguro que olvido. También parte de este trabajo ha sido posible gracias a Ashraf, Jian, Abbas, Sadegh y Jin Lin, que fueron un apoyo fundamental durante mi estancia en Chalmers University of Technology. A mi familia. A mis abuelos Rosita y Miguel, Amparo y Salvador. Sé que habéis estado conmigo.A mi hermana Nuria, por aguantar mil cenas oyéndonos hablar de Antenas.A mi madre, por apoyarme y espolearme. Por exigirme siempre más cuando yo creo que es suficiente.A mi padre, por ser un guía infatigable, porque llegar hasta aquí a tu lado es de las mejores cosas que haré en esta vida.A Dulce, la mujer más extraordinaria del mundo. Si existe el destino, hizo bien al ponernos juntos. Tu a mi lado y yo al tuyo para superar todos los obstáculos y superar todas las barreras. Nunca habrá suficientes gracias por haberme apoyado tanto y haber sido tan paciente y sincera en cada etapa de este viaje.Es curioso como al final de todo, de tanto trabajo, debería sentirme inmensamente feliz, pero echando la vista atrás, no soy más feliz ahora que durante todo el camino recorrido a vuestro lado. Gracias.x

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Metamaterials: Reshape and Rethink

Cited by 40 publications

References 42 publications

Using Homogeneous Equivalent Parameters in Finite Element Models of Curved Metamaterial Structures

Using Homogeneous Equivalent Parameters in Finite Element Models of Curved Metamaterial Structures

Microwave antennas—An intrinsic part of RF energy harvesting systems: A contingent study about its design methodologies and state‐of‐art technologies in current scenario

Gap Waveguide Array Antennas and Corporate-Feed Networks for mm-Wave band Applications

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