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Dissertations / Theses on the topic 'ARTIFICIAL MAGNETIC CONDUCTOR PLANE'

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Published: 11 September 2023

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1

Visser, Hugo Hendrik. "An artificial magnetic ground-plane for a log-periodic antenna." Thesis, Stellenbosch : University of Stellenbosch, 2010. http://hdl.handle.net/10019.1/4176.

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Thesis (MScEng (Electrical and Electronic Engineering))--University of Stellenbosch, 2010.<br>ENGLISH ABSTRACT: This paper presents the implementation of an artificial magnetic ground-plane with a low profile Log-periodic Dipole Array (LPDA) antennas. After the properties of three typical Electromagnetic Bandgap (EBG) structures are investigated and their bandwidth properties are studied, a mechanism is presented to improve the band-width over which the EBG surface acts as a perfect magnetic conductor (PMC). A low profile LPDA is modeled above this surface and the results indicate an impr
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2

Almutawa, Ahmad Tariq. "Log-Periodic Microstrip Patch Antenna Miniaturization Using Artificial Magnetic Conductor Surfaces." Scholar Commons, 2011. http://scholarcommons.usf.edu/etd/2982.

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Microstrip patch antennas are attractive for numerous military and commercial applications due to their advantages in terms of low-profile, broadside radiation, low-cost, low-weight and conformability. However, the inherent narrowband performance of patch antennas prohibits their use in systems that demand wideband radiation. To alleviate the issue, an existing approach is to combine multiple patch antennas within a log-periodic array configuration. These log-periodic patch antennas (LPMAs) are capable of providing large bandwidths (>50%) with stable broadside radiation patterns. However, they
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3

Kostka, Darryl. "Enhancement of printed inductors using artificial magnetic conductor (AMC) surfaces for millimeter-wave applications." Thesis, McGill University, 2009. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=40815.

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Integrated inductors are one of the most basic elements used in the design of modern electronic systems. However, they generally suffer from poor quality and are inherently area intensive, thus limiting system performance and prove to be a bottleneck for compact system integration. Several research efforts have been devoted to the development of miniaturized, high quality inductors. One such method proposes the use of an Artificial Magnetic Conductor (AMC) surface to enhance the inductor performance by creating a second inductive region thereby enabling inductor reuse. It can theoretically be
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4

Jamaly, Nima. "Comparative Study of Different Excitation Techniques for Microstrip-like Structures over an Infinite Perfect Electric Conductor Plane." Thesis, University of Gävle, Department of Technology and Built Environment, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-326.

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<p>The overall goal of the thesis is to establish detailed comparisons among different well-known models of excitations in their application on Microstrip-like Monopoles. Comparisons are made over the input impedances predicted by these excitations. In this way, the Galerkin’s version of the Method of Moment is applied and rooftops functions are chosen as our basis/weighting functions. Different excitation models have their influence over the excitation vector and a unique MoM matrix is used to give input impedances. We shall elicit the effects of several parameters over relative input self/mu
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5

Wang, Shenhong. "High-gain planar resonant cavity antennas using metamaterial surfaces." Thesis, Loughborough University, 2006. https://dspace.lboro.ac.uk/2134/12481.

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This thesis studies a new class of high gain planar resonant cavity antennas based on metamaterial surfaces. High-gain planar antennas are becoming increasing popular due to their significant advantages (e.g. low profile, small weight and low cost). Metamaterial surfaces have emerged over the last few years as artificial structures that provide properties and functionalities not readily available from existing materials. This project addresses novel applications of innovative metamaterial surfaces on the design of high-gain planar antennas. A ray analysis is initially employed in order to desc
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6

Guo, Yunchuan. "Analysis and design of novel electromagnetic metamaterials." Thesis, Loughborough University, 2006. https://dspace.lboro.ac.uk/2134/7864.

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This thesis introduces efficient numerical techniques for the analysis of novel electromagnetic metamaterials. The modelling is based on a Method of Moments modal analysis in conjunction with an interpolation scheme, which significantly accelerates the computations. Triangular basis functions are used that allow for modelling of arbitrary shaped metallic elements. Unlike the conventional methods, impedance interpolation is applied to derive the dispersion characteristics of planar periodic structures. With these techniques, the plane wave and the surface wave responses of fractal structures ha
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7

Meng, Fanhong. "Développement d’antennes à base de structures métamatériaux pour les applications aéronautiques (GPS/DME, bande L) et de communications haut débit (en bade E – 80 GHz)." Thesis, Paris 10, 2015. http://www.theses.fr/2015PA100203.

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Les travaux présentés dans ce manuscrit sont relatifs à la conception et au développement d’antennes basées sur les structures artificielles – métamatériaux. La première antenne conçue et réalisée est une antenne bi-fonction en bande L (~1GHz) (GPS et DME) à diversité de bande/de polarisation, destinée aux applications aéronautiques. Ces travaux rentrent dans le cadre du projet MSIE (pôle de compétitivité ASTHEC) pour lequel notre LEME a été très actif. Les partenaires industriels de ce projet sont EADS/IW, Dassault aviation, INEO-Défense, SATIMO. Les résultats montrent la faisabilité d’une an
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8

Raimbault, Narcisse. "Antenne hélice compacte directive à polarisation circulaire pour dispositif RFID." Thesis, Rennes 1, 2015. http://www.theses.fr/2015REN1S009/document.

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La technologie RFID (Radio Frequency Identification) prend une place de plus en plus importante dans la société d'aujourd'hui notamment dans des domaines aussi variés que la santé, la sécurité, la logistique... Le développement de cette technologie met en évidence de nouvelles contraintes comme la réduction des zones de lecture et la géo-localisation pour le stockage et le suivi de marchandises. Dans ce contexte, la thèse s'est focalisée sur le développement d'antennes pour lecteur RFID dans le cadre du projet SPINNAKER piloté par TAGSYS RFID et soutenu par OSEO. L'objectif de cette étude est
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9

Kristou, Nebil. "Étude et conception de métamatériaux accordables pour la miniaturisation d’antennes aux fréquences micro-ondes." Thesis, Rennes 1, 2018. http://www.theses.fr/2018REN1S016/document.

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Les antennes présentes dans la plupart des systèmes communicants comme les véhicules automobiles, les avions et les trains se multiplient et sont soumises à une contrainte d’intégration de plus en plus sévère. De nombreuses techniques de miniaturisation d’antennes existent et passent toutes par un compromis entre la taille et les performances (bande passante et/ou rendement de rayonnement). Pour les systèmes cités ci-dessus, les antennes sont souvent placées devant ou à proximité d’un réflecteur métallique (toit de véhicule, carlingue d’aéronef). Dans ce cas, l’épaisseur de système antennaire
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10

Silva, Pimenta Marcio. "Antennes souples à base de métamatériaux de type conducteurs magnétiques artificiels pour les standards de systèmes de géolocalisation." Phd thesis, Université Nice Sophia Antipolis, 2013. http://tel.archives-ouvertes.fr/tel-00923200.

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Grâce aux progrès réalisés ces dernières années dans la conception de réseaux intelligents, tels que les réseaux centrés sur la personne (WBAN) ou les réseaux sans fils de proximité (WPAN), de nouveaux types d'applications émergent et utilisent des capteurs d'informations capables de relever les paramètres physiologiques, environnementaux et plus particulièrement le positionnement des personnes. Dans ce cadre, nous nous sommes attachés dans ce travail de recherche à la conception et la réalisation d'antennes en polarisation circulaire pouvant être intégrées dans des vêtements, pour les standar
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11

CHAUHAN, MANOJ SINGH. "INVESTIGATION OF ELECTROMAGNETIC BAND GAP STRUCTURES FOR MICRO STRIP PATCH ANTENNA." Thesis, 2014. http://dspace.dtu.ac.in:8080/jspui/handle/repository/15452.

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The main objective of this dissertation “Investigation of Electromagnetic Band Gap Structures for Micro Strip patch Antenna” is to design and simulate the various electromagnetic band gap (EBG) structure in order to investigate their frequency band gap region and reflection phase characteristic for micro strip antenna parameter improvement. Range of frequency region at which wave cannot propagate in the material is known as frequency band gap region and variation in phase of a reflected wave is produced by a surface determined by the reflection phase property. Two dimensional mushroom-li
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12

Peng, Guan-Fu, and 彭冠富. "Design of a Novel Artificial Magnetic Conductor." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/60437937815906937556.

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碩士<br>國立彰化師範大學<br>電信工程研究所<br>97<br>In this thesis, we propose a novel artificial magnetic conductor(AMC) structure using wire helix in a metal box. This structure is equivalent to a parallel resonant LC circuit resulting in some kinds of characteristics like the perfect magnetic conductor(PMC) at resonance frequency. Due to the periodic arrangement of this structure, the electromagnetic band-gap(EBG) effect will appear in this specific band. First, we calculate the effective AMC bandwidth with reflection phase between 45 degrees for AMC with infinite elements case by a numerical analysis
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13

Hsu, Sheng-Chieh, and 許勝傑. "Reflection Characteristics of a Gradient Artificial Magnetic Conductor." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/37128951384019539623.

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碩士<br>國立交通大學<br>電信工程研究所<br>99<br>We studied the electromagnetic reflection of a two-dimensional square patches array backed with a grounded dielectric slab. By tuning the size of the metal patch, the adjacent two patches may have an equal reflected-phase angle. Using this property of progressively reflected-phase angle in the array elements, for a normal incident wave we can steer the reflected wave into a desired direction. In this thesis, we have established a simple formula based on the array antenna theory to figure out the reflected wave pattern. Moreover, a time-domain full-wave simulati
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14

Yang, Cheng-Yan, and 楊承諺. "Design of Tag Antennas with Artificial Magnetic Conductor for On-Body Applications." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/97448130247265925963.

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碩士<br>國立宜蘭大學<br>電子工程學系碩士班<br>104<br>This thesis aims at designing UHF RFID tag antennas with artificial magnetic conductor and a circularly polarized(CP) antenna for on-body applications. UHF radio frequency identification (RFID) technology is capable of being used to monitor and identify objects or people. By using backscattering modulation to communicate between a reader and tags, UHF RFID has a relatively far reading range, quick data transferring rate, large data carrying capacity and other advantages. However, when on-body applications are required, the input impedance, radiation pattern,
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15

Kern, Douglas John Werner Douglas H. "Advancements in artificial magnetic conductor design for improved performance and antenna applications." 2009. http://etda.libraries.psu.edu/theses/approved/WorldWideIndex/ETD-4373/index.html.

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16

HONG, JHIH-HAN, and 洪志翰. "Design of Circularly Polarized Tag Antenna with Artificial Magnetic Conductor for On-Body Applications." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/422486.

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碩士<br>國立宜蘭大學<br>電子工程學系碩士班<br>105<br>This thesis aims at designing UHF tag antennas with artificial magnetic conductor (AMC) for on-body UHF RFID applications. RFID technology has extensive applications in the world markets. In the development of the IOT, there will be various kinds of object using tag antennas to transfer information. Even in case of developing for on-body applications, the wearable device or tags will be indispensable. Whenever the tag is applied on the different objects, the performance of the tag will be changed by the material of object. Designers must seriously consider t
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17

Han-LinYue and 岳翰林. "Research on Millimeter-Wave CMOS On-Chip Antennas and Artificial Magnetic Conductor (AMC) Antennas." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/18268790475031752540.

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18

Nafe, Mahmoud. "Gain-Enhanced On-Chip Antenna Utilizing Artificial Magnetic Conductor Reflecting Surface at 94 GHz." Thesis, 2015. http://hdl.handle.net/10754/565638.

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Nowadays, there is a growing demand for high frequency-bandwidth mm-wave (30-300 GHz) electronic wireless transceiver systems to support applications such as high data-rate wireless communication and high resolution imaging. Such mm-wave systems are becoming more feasible due to the extreme transistor downscaling in silicon-based integrated circuits, which enabled densely-integrated high-speed elec- tronics operating up to more than 100 GHz with low fabrication cost. To further enhance system integrability, it is required to implement all wireless system compo- nents on the chip. Presently, th
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19

"High Impedance Surface Using A Loop With Negative Impedance Elements." Master's thesis, 2010. http://hdl.handle.net/2286/R.I.8791.

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abstract: Antennas are required now to be compact and mobile. Traditional horizontally polarized antennas are placed in a quarter wave distance from a ground plane making the antenna system quite bulky. High impedance surfaces are proposed for an antenna ground in close proximity. A new method to achieve a high impedance surface is suggested using a metamaterial comprising an infinite periodic array of conducting loops each of which is loaded with a non-Foster element. The non-Foster element cancels the loop's inductance resulting in a material with high effective permeability. Using this mate
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20

YiWu and 吳易. "60- and 77-GHz Millimeter-Wave CMOS On-Chip Artificial-Magnetic-Conductor Antennas and Integrated Phased-Array Antenna RFIC." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/h99u3g.

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碩士<br>國立成功大學<br>電腦與通信工程研究所<br>102<br>This thesis presents the research of millimeter-wave (MMW) CMOS on-chip antennas fabricated using TSMC 90-nm and 0.18-μm CMOS standard process. The three-dimensional (3D) EM simulator HFSS is used for design and simulation. The designed MMW on-chip antennas including: (1) a 60-GHz CMOS integrated on-chip artificial-magnetic-conductor (AMC) spiral monopole-antenna with compact folded loop dual-mode bandpass filter; (2) a 60-GHz CMOS AMC bandpass-filtering spiral monopole-antenna; (3) a 77-GHz CMOS AMC 1×2 folded dipole antenna array; (4) a 60-GHz CMOS AMC 2×
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21

Yung-HsiagnChuang and 莊詠翔. "Research on 60- and 77-GHz GIPD On-Chip Antenna / Filtering-Antennas and CMOS Artificial Magnetic Conductor (AMC) Antennas." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/23845646976160362070.

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碩士<br>國立成功大學<br>電腦與通信工程研究所<br>100<br>This thesis presents the design of millimeter-wave (MMW) GIPD and CMOS on-chip antennas. The GIPD and CMOS MMW on-chip antennas are fabricated with tMt GIPD process and TSMC 90-nm CMOS standard process, respectively. The three-dimensional (3D) EM simulator HFSS is used for design simulation. The designed MMW on-chip antennas including: (1) a 77-GHz GIPD integrated on-chip Yagi antenna with balun-bandpass filter, which combined three passive components (antenna, balun, bandpass filter) of the MMW receiver front-end; (2) a 77-GHz CMOS integrated on-chip AMC-Y
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22

Huang, Chien-Jung, and 黃建融. "Formulation of a Standard Flow Chart of Feeding the Low Profile Antenna and Extraction of the Artificial Magnetic Conductor Band from the Reflection Phases." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/97925226528887092232.

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碩士<br>國立交通大學<br>電信工程研究所<br>102<br>A popular way to design a low profile antenna is by combining the traditional antenna with a high impedance surface (HIS), because the HIS can mimic the property of the perfect magnetic conductor (PMC) to improve the radiation. However, the way to feed the low profile antenna is still a big issue because the artificial magnetic conductor (AMC) condition of the HIS is a frequency-dependent property. It means the frequency band in which the PMC property of the HIS prevails is limited. This band is termed as the AMC region. There had been intensive research perfo
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23

Alibakhshikenari, M., B. S. Virdee, C. H. See, Raed A. Abd-Alhameed, F. Falcone, and E. Limiti. "High-gain metasurface in polyimide on-chip antenna based on CRLH-TL for sub-terahertz integrated circuits." 2020. http://hdl.handle.net/10454/17985.

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Yes<br>This paper presents a novel on-chip antenna using standard CMOS-technology based on metasurface implemented on two-layers polyimide substrates with a thickness of 500 μm. The aluminium ground-plane with thickness of 3 μm is sandwiched between the two-layers. Concentric dielectric-rings are etched in the ground-plane under the radiation patches implemented on the top-layer. The radiation patches comprise concentric metal-rings that are arranged in a 3 × 3 matrix. The antennas are excited by coupling electromagnetic energy through the gaps of the concentric dielectric-rings in the ground-
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