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Автор: Grafiati
Опубліковано: 11 вересня 2023

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Статті в журналах з теми "ARTIFICIAL MAGNETIC CONDUCTOR PLANE"

1

Park, I. Y., and D. Kim. "High-gain antenna using an intelligent artificial magnetic conductor ground plane." Journal of Electromagnetic Waves and Applications 27, no. 13 (August 5, 2013): 1602–10. http://dx.doi.org/10.1080/09205071.2013.817957.

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2

Wang, S., A. P. Feresidis, G. Goussetis, and J. C. Vardaxoglou. "Low-profile resonant cavity antenna with artificial magnetic conductor ground plane." Electronics Letters 40, no. 7 (2004): 405. http://dx.doi.org/10.1049/el:20040306.

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3

Yan, Sen, Ping Jack Soh, and Guy A. E. Vandenbosch. "Low-Profile Dual-Band Textile Antenna With Artificial Magnetic Conductor Plane." IEEE Transactions on Antennas and Propagation 62, no. 12 (December 2014): 6487–90. http://dx.doi.org/10.1109/tap.2014.2359194.

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4

Kumar Pandey, Gaurav, Hari Shankar Singh, and Manoj Kumar Meshram. "Investigations of triple band artificial magnetic conductor back plane with UWB antenna." Microwave and Optical Technology Letters 58, no. 8 (May 27, 2016): 1900–1906. http://dx.doi.org/10.1002/mop.29943.

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5

Abdulbari, Ali Abdulateef, Sharul Kamal Abdul Rahim, Firas Abedi, Ping Jack Soh, Ali Hashim, Rami Qays, Sarosh Ahmad, and Mohammed Yousif Zeain. "Single-Layer Planar Monopole Antenna-Based Artificial Magnetic Conductor (AMC)." International Journal of Antennas and Propagation 2022 (July 21, 2022): 1–9. http://dx.doi.org/10.1155/2022/6724175.

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Анотація:
In this paper, a coplanar waveguide (CPW)-fed patch antenna is fabricated on a layer of metasurface to increase gain. The antenna is fabrication on Roger substrate with a thickness of 0.25 mm, with the overall dimension of the proposed design being 45 × 30 × 0.25 mm3. The size of the patch antenna is 24 × 14 × 0.25 mm3, and the AMC unit cell is 22 × 22 × 0.25 mm3. This metasurface is designed based on the split-ring resonator unit cells forming an array of the artificial magnetic conductor (AMC). Meanwhile, the antenna operation on 3.5 GHz is enabled by etching a split-ring resonator slot on the ground plane with a small gap to enhance antenna gain and improve impedance bandwidth when integrated with a metasurface. This simulation planer monopole antenna is applied for 5G application. The experimenter test is applied for the antenna performance in terms of return loss, gain, and radiation patterns. The operating frequency range with and without MTM is from 3.41 to 3.68 GHz (270 MHz) and 3.37 to 3.55 GHz (180 MHz), respectively, with gain improvements of about 2.7 dB (without MTM) to 6.0 dB (with MTM) at 3.5 GHz. The maximum improvement of the gain is about 42% when integrated with the AMC. The AMC has solved several issues to overcome the typical limitation in conventional antenna design. A circuit model is also proposed to simplify the estimation of the performance of this antenna at the desired frequency band. The proposed design is simulated by CST microwave studio. Finally, the antenna is fabricated and measured. Result comparison between simulations and measurements indicates a good agreement between them.
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6

Dewan, Raimi, M. K. A. Rahim, Mohamad Rijal Hamid, and M. F. M. Yusoff. "Analysis of Wideband Antenna Performance over Dual Band Artificial Magnetic Conductor (AMC) Ground Plane." Applied Mechanics and Materials 735 (February 2015): 273–77. http://dx.doi.org/10.4028/www.scientific.net/amm.735.273.

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Анотація:
A Coplanar Waveguide (CPW) wideband antenna operates from 2.69 GH to 6.27 GHz which act as reference antenna (RA) has been designed. A Dual Band AMC (DBAMC) unit cells have been proposed to operate at 2.45 GHz and 5.8 GHz. AMC is a metamaterial which mimics the behavior of zero reflection phase of Perfect Magnetic Conductor (PMC) at resonance frequency which not naturally existed in nature. Subsequently the antenna is incorporated with AMC unit cell, herein referred as Antenna with Dual Band AMC (ADBAMC). The DBAMC succesfully excites additional resonance at 2.45 GHz outside the initial operating range of standalone CPW wideband antenna. Incorporation of DBAMC to antenna achieves back lobe suppression at 2.45 GHz and 5.8 GHz. The overall average gain of AMC incorporated antenna is improved from 2.69 to 6.29 GHz as opposed to the standalone reference CPW wideband antenna. Study of surface current is also presented and discussed.
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7

Yeo, J., and D. Kim. "Design of a Wideband Artificial Magnetic Conductor (AMC) Ground Plane for Low-Profile Antennas." Journal of Electromagnetic Waves and Applications 22, no. 16 (January 2008): 2125–34. http://dx.doi.org/10.1163/156939308787522546.

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8

Libi Mol, V. A., and C. K. Aanandan. "Radar Cross Section Reduction of Low Profile Fabry-Perot Resonator Antenna Using Checker Board Artificial Magnetic Conductor." Advanced Electromagnetics 7, no. 2 (March 3, 2018): 76–82. http://dx.doi.org/10.7716/aem.v7i2.686.

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Анотація:
This paper presents a novel low profile, high gain Fabry-Perot resonator antenna with reduced radar cross section (RCS). An artificial magnetic conductor which provides zero degree reflection phase at resonant frequency is used as the ground plane of the antenna to obtain the low profile behavior. A checker board structure consisting of two artificial magnetic conductor (AMC) surfaces with antiphase reflection property is used as the superstrate to reduce the RCS. The bottom surface of superstrate is perforated to act as partially reflective surface to enhance the directivity of antenna. The antenna has a 3 dB gain bandwidth from 9.32 GHz to 9.77 GHz with a peak gain of 12.95 dBi at 9.6 GHz. The cavity antenna also has reduced reflectivity with a maximum reduction of 14.5 dB at 9.63 GHz.
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9

Fan, Fangfang, Xiao Fan, Xiaoyu Wang, and Zehong Yan. "A Low-Profile Broadband Circularly Polarised Wide-Slot Antenna with an Artificial Magnetic Conductor Reflector." Applied Computational Electromagnetics Society 36, no. 6 (August 6, 2021): 740–46. http://dx.doi.org/10.47037/2020.aces.j.360616.

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Анотація:
In this letter, a novel broadband circularly polarisation (CP) wide-slot antenna with an artificial magnetic conductor (AMC) as the reflector is presented. The wide-slot antenna is composed of a knife-shaped radiator and an improved ground plane. A broadband CP characteristic can be achieved by slotting the ground plane to make it an asymmetric ground shape. However, the average gain of the wide-slot antenna is only about 3 dBic because of bidirectional radiation. An AMC reflector is adopted to enhance the gain of the wide-slot antenna without introducing a high profile similar to the PEC reflector. In addition, the four metal plates are vertically placed around the antenna to broaden the axial ratio (AR) bandwidth of the antenna with the AMC reflector. The measurement results show that the 3dB AR bandwidth of the proposed CP antenna is 32.4% (2.35GHz─3.26GHz), the average gain is 6.5dBic in the AR bandwidth and the value of VSWR in the AR bandwidth is less than 2. The size of the antenna is 0.84λ0× 0.84λ0× 0.13λ0 at the centre frequency of 2.805 GHz. The proposed antenna has a low profile, broad AR bandwidth and high gain, thereby being a good candidate for various wireless communication systems.
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10

de Cos, M. E., F. Las Heras, and M. Franco. "Design of Planar Artificial Magnetic Conductor Ground Plane Using Frequency-Selective Surfaces for Frequencies Below 1 GHz." IEEE Antennas and Wireless Propagation Letters 8 (2009): 951–54. http://dx.doi.org/10.1109/lawp.2009.2029133.

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Дисертації з теми "ARTIFICIAL MAGNETIC CONDUCTOR PLANE"

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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Анотація:
Thesis (MScEng (Electrical and Electronic Engineering))--University of Stellenbosch, 2010.
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 improved band-width region. Compared with a LPDA in free space the frequency band is shifted higher by the EBG surface and the gain pattern is shifted from a horizontal orientation to a vertical orientation.
AFRIKAANSE OPSOMMING: Hierdie dokument stel voor die implementering van kunsmatige magnetiese grondvlakke met Logaritmiese Periodiese Dipool Samestelling (LPDS) antennas. Die eienskappe van drie tipiese Elektromagnetiese Bandgaping (EBG) strukture word ondersoek en hul bandwydte eienskappe word bestudeer. ’n Meganisme word voorgestel om die bandwydte te verbeter waar die EBG oppervlakte soos n perfekte magnetiese geleier optree. ’n Lae profiel LPDS word bo hierdie oppervlakte geplaas. Die resultate dui aan ’n verbetering in the bandwydte. In vergelyking met ’n LPDS in vrye ruimte skuif die frekwensie band ho¨er as gevolg van die EBG oppervlakte en die aanwins patroon skuif van ’n horisontale orientasie na ’n vertikale orientasie.
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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 suffer from electrically large sizes. Therefore, their miniaturization without degrading the bandwidth performance holds promise for extending their use in applications that demand conformal and wideband installations. In recent years, electromagnetic band gap structures have been proposed to enhance the radiation performances of printed antennas. These engineered surfaces consist of a periodic arrangement of unit cells having specific metallization patterns. At particular frequencies, they provide a zero-degree phase shift for reflected plane waves and effectively act as high impedance surfaces. Since, their band-limited electromagnetic field behavior is quite similar to a hypothetical magnetic conductor; they are also referred to as artificial magnetic conductors (AMCs). AMC structures were shown to allow lower antenna profile, larger bandwidth, higher gain, and good unidirectional radiation by alleviating the field cancellation effects observed in ground plane backed antenna configurations. Previous research studies have already demonstrated that microstrip patch antennas can enjoy significant size reductions when placed above the AMC surfaces. This project, for the first time, investigates the application of AMCs to LPMA configurations. Specifically, the goal is to reduce the LPMA size while retaining its highly desired large bandwidth performance. To accomplish this, we employ various AMC surface configurations (e.g. uniform, log-periodic) under traditional LPMAs and investigate their performance in terms of miniaturization, bandwidth, gain, and radiation patterns.
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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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Анотація:
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 shown, through image theory, that an AMC reflector can be used to effectively double the inductance of an inductor component. Accordingly, in order to validate this concept, two AMC surface designs are investigated for both on-chip and PCB-based implementations. The designed AMC surfaces are then integrated with standard loop inductor components in order to justify their performance benefits through measurement results of the fabricated prototypes. Finally, the practicality of this approach is demonstrated through the application of mm-wave VCOs by replacing a standard LC-VCO tank inductor with a miniaturized AMC-backed inductor. In order to do so, mm-wave LC-VCO prototypes are designed, fabricated and characterized through measurements.
Les inducteurs intégrés sont parmi les éléments élémentaires les plus utilisés dans la conception de systèmes électroniques modernes. Cependant, ils souffrent généralement d’une faible qualité et d’une large consomption d’espace, limitant ainsi les performances du système et compliquent donc l’intégration de systèmes compactes. Plusieurs efforts en recherche ont été consacrés au développement d’inducteurs de haute qualité miniatures. Une de ces méthodes proposent l’utilisation d’un Conducteur Magnétique Artificiel (CMA) comme surface pour améliorer la performance de l’inducteur en créant une deuxième région inductive ainsi permettant la réutilisation de l’inducteur. Il peut être démontré théoriquement, par la théorie des images, qu’un réflecteur CMA peut être utilisé pour doubler l’inductance total d’un inducteur. Par conséquent, afin de valider ce concept, deux designs de surfaces CMA sont investigués pour l’intégration sur puce (on-chip) et sur carte (PCB). Les surfaces CMA sont ensuite intégrées avec des composantes d’inducteurs en boucle standards afin de justifier leurs avantages en termes de performances par les résultats expérimentaux obtenus par ces prototypes. Finalement, le caractère pratique de cette approche est démontré par l’application d’un Oscillateur (VCO) d’ondes-mm en remplaçant le réservoir-LC par une version miniaturisée d’un inducteur par CMA. Pour ce faire, les prototypes d’Oscillateur-LC à ondes-mm sont conçus, fabriqués et caractérisé de façon expérimentale.
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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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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/mutual impedances derived from these excitation models and finally make conclusions about their differences in anticipating the input Resistance, input Reactance and also resonance frequencies.

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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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Анотація:
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 describe the beamfonning action of planar resonant cavity antennas. The phase equations of resonance predict the possibility of low-profile/subwavelength resonant cavity antennas and tilted beams. The reduction of the resonant cavity profile can be obtained by virtue of novel metamaterial ground planes. Furthermore, the EBG property of metamaterial ground planes would suppress the surface waves and obtain lower backlobes. By suppressing the TEM mode in a resonant cavity, a novel aperture-type EBG Partially Reflective Surface (PRS) is utilized to get low sidelobes in both planes (E-plane and H-plane) in a relatively finite structure. The periodicity optimization of PRS to obtain a higher maximum directivity is also investigated. Also it is shown that antennas with unique tilted beams are achieved without complex feeding mechanism. Rectangular patch antennas and dipole antennas are employed as excitations of resonant cavity antennas throughout the project. Three commercial electromagnetic simulation packages (Flomerics Microstripes ™ ver6.S, Ansoft HFSSTM ver9.2 and Designer ™ ver2.0) are utilized during the rigorous numerical computation. Related measurements are presented to validate the analysis and simulations.
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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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Анотація:
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 have been studied by means of transmission coefficients and dispersion diagrams. The multiband properties and the compactness of the proposed structures are presented. Based on this method, novel planar left-handed metamaterials are also proposed. Verifications of the left-handedness are presented by means of full wave simulation of finite planar arrays using commercial software and lab measurement. The structures are simple, readily scalable to higher frequencies and compatible with low-cost fabrication techniques.
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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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Анотація:
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 antenne unique pouvant avoir simultanément deux fonctions avec une diversité de polarisation et de bande spectrale. L’utilisation des métamatériaux a permis en particulier le maintien de la polarisation circulaire de l’antenne GPS -L1 à L5. La fonction DME a été consolidée avec le maintien de son gain. La seconde antenne est une antenne cavité Fabry-Pérot mettant en œuvre une structure partiellement réfléchissante double couche. Nous avons démontré le phénomène physique d’inversion de la phase du coefficient de réflexion de la PRS. Nous avons obtenu un gradient positif de phase sur une bande de 5 GHz autour de 80GHz. Grace à ce profil nouveau de la phase obtenu par la structure métamatériau PRS, on dispose d’une avance linéaire de la phase qui compense le retard du à la cavité Fabry-Pérot. Ainsi on maintient les conditions de résonance de la cavité sur une large bande, 5GHz. Nous démontrons, que la mise en œuvre de cette structure aux caractéristiques inédites permet de réaliser une antenne cavité ultra-directive sur une très large bande spectrale de 5GHz. Les performances atteintes sont une directivité de 35 à 40dBi sur 5 GHz, une adaptation parfaite (gain ~ directivité) avec très peu de sources primaires. L’antenne est compacte avec une hauteur totale inférieure au 10mm (connecteur compris) et une surface de 100mmx100mm
The work presented in this manuscript is related to the design and development of antennas based on artificial structures - metamaterials. The first designed and built antenna is a GPS and DME dual-function in the L (~ 1GHz). It is an antenna designed with polarization and spectral diversities for aeronautical applications. The work is within the MSIE project of ASTHEC cluster for which our laboratory (LEME) was very active. The industrial partners of the project are EADS/IW, Dassault Aviation, INEO-Defense SATIMO. The results show the feasibility of a single antenna having simultaneously two functions with a diversity of polarization and spectral band. The use of metamaterials enabled in particular the preservation of circular polarization of the GPS antenna on the bands ranging from L1 to L2. The DME function was consolidated with the same gain.The second antenna is an antenna Fabry-Perot cavity employing a partially reflective structure (PRS) Double-layer. We have demonstrated by numerical simulation and experimental characterization, the physical phenomenon of inversion phase of the reflection coefficient PRS. We obtain a positive gradient of the phase over a broad band of 5 GHz around 80GHz. Thanks to this new profile obtained by the PRS metamaterial structure, it has a linear advance of the phase which compensates for the delay of the Fabry-Perot cavity. Thus the cavity resonance conditions are maintained over a wide band, 5GHz. We demonstrate that the implementation of this structure with unique features allows a highly directive antenna cavity over a very wide spectral band 5GHz. The performance are a directivity of 35-40 dBi over 5 GHz, a perfect adaptation (gain ~ directivity) with very few primary sources
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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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Анотація:
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 de concevoir des antennes compactes et directives à polarisation circulaire en bande UHF et SHF. L'antenne hélice présente toutes ces caractéristiques à l'exception de la hauteur, très importante dès que l'on souhaite obtenir des performances élevées surtout en gain. Dans ce manuscrit, trois solutions sont proposées pour réduire la hauteur de l'antenne hélice tout en répondant aux cahiers des charges. La première solution consiste à utiliser un réflecteur de forme cylindrique ou conique qui permet de réduire la hauteur d'une antenne hélice classique d'un facteur quatre pour atteindre 0,9λ. La réduction de la hauteur se traduit par une augmentation de la surface autour de l'antenne avec une dimension latérale de 2,3λ. La seconde solution consiste à utiliser l'antenne hélice avec une cavité Fabry-pérot. La hauteur du système antennaire obtenue est de 0,5λ avec un diamètre de 2λ. La dernière solution développée dans la thèse introduit une surface CMA à la solution précédente qui permet de réduire la hauteur à 0,25λ. Toutes les solutions proposées ont été validées expérimentalement
Over the past 20 years, the RFID (Radio Frequency Identification) technology is having a huge expansion. Nowadays, it is frequently used in different areas as the health, the security and the logistic. A lot of researches are ongoing on this topic, especially in order to reduce the reading zone of the readers and to locate the tags. This thesis focuses on the development of new antennas for Readers RFID devices and is part of the SPINNAKER project supported by OSEO. The antennas requirements are circular polarization, high directivity and gain with low profile. The helix antennas meet all these requirements except the axial length. In this manuscript, we propose three solutions to reduce the helix antenna axial length. The first one uses a cylindrical or conical optimal reflector to reduce the length by four. This reduction affects directly the surface witch increases up to 2.3λ. The second solution uses the helix antenna as a circular polarization feed for a Fabry-Perot (FP) cavity. The final antenna presents a cavity height of 0.5λ and a 2λ diameter. The last solution conserves the FP cavity in which we include an Artificial Magnetic Conductor (AMC) to reduce the cavity height to 0.25λ. All these solutions are validated by measurements
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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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Анотація:
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 est une contrainte majeure et les métamatériaux de type Conducteur Magnétique Artificiel (CMA) ouvrent des perspectives intéressantes grâce à leurs propriétés électromagnétiques non conventionnelles. Cependant, pour les applications sub-GHz (RFID, LTE, PMR…), les CMA sont limités par les dimensions des cellules unitaires nécessaires à leur mise en œuvre (λg/4) ainsi que leur bande réduite de fonctionnement. Réduire leurs dimensions permet de rendre leur utilisation compatible avec le contexte des antennes miniatures intégrées. Ajouter l’agilité fréquentielle permet de palier le problème de la bande passante réduite dans le cas des antennes et des CMA miniaturisés en ajustant le fonctionnement du système antennaire sur une large bande passante. Cette thèse de doctorat propose d’étudier et de développer un nouveau système antennaire à faible profil composé d’une antenne miniature associée à une métasurface compacte reconfigurable en fréquence et compatible avec le standard NB-IoT dans la bande basse LTE (700 MHz – 960 MHz)
Antennas are now very integrated in several connected systems like cars, airplanes and trains. Many antenna miniaturization techniques exist and all go through a compromise between size and performance (bandwidth and/or radiation efficiency). For the systems mentioned above, the antennas are often placed near a metallic reflector (vehicle roof, aircraft cabin). Within this context, Artificial Magnetic Conductors (AMC) present an attractive reflector for low profile antennas which can take advantage of intrinsic zero reflection phase response to boost antenna performance without the need for thick quarter wave backplane. However, for sub-GHz applications (RFID, LTE, PMR ...), AMC are limited by the size of the unit cells necessary for their implementation (λg/4) as well as their reduced operating bandwidth. AMC miniaturization makes their use compatible with small antennas. Adding tunability restores the possibility of adjusting the operating frequency over a large bandwidth. This PhD thesis proposes to study and develop a new electrically small, low-profile antenna based on miniaturized and tunable AMC for the NB-IoT standard in low LTE band (700 MHz – 960 MHz)
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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 standards de géolocalisation européen Galiléo et Américain GPS. Nous avons utilisé pour ces antennes des structures métamatériaux de type conducteurs magnétiques artificiels, afin d'augmenter les performances en rayonnement et pour diminuer le couplage avec et le corps humain. Une autre voie explorée est l'utilisation d'antennes patchs qui sont de nature faible encombrement. La bande de fréquence du standard de communications par satellite Iridium étant très proche du standard de géolocalisation GPS, nous avons trouvé intéressant de développer une solution de type patch couvrant les deux bandes GPS (1,575 GHz) et Iridium (1,621 GHz). L'antenne devant être intégrée sur une boite crânienne, les niveaux de débit d'absorption spécifique et les modifications du rayonnement sous conformation de l'antenne ont également été étudiés. L'évolution de ce travail a été ensuite d'étudier le comportement de cette antenne posée sur le dessus d'un casque militaire français. Les performances en rayonnement ont été satisfaisantes et ont montré la possibilité d'une telle application.
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Частини книг з теми "ARTIFICIAL MAGNETIC CONDUCTOR PLANE"

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Dewan, R., M. K. A. Rahim, M. R. Hamid, N. A. Samsuri, M. F. M. Yusoff, B. D. Bala, and M. E. Jalil. "Dual Band Stacked Artificial Magnetic Conductor with Dipole Antenna." In Theory and Applications of Applied Electromagnetics, 197–205. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-17269-9_21.

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Panda, Prakash Kumar, and Debalina Ghosh. "High Gain Slot Antenna by Using Artificial Magnetic Conductor." In Lecture Notes in Networks and Systems, 272–77. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-2774-6_34.

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Kumar, Ashok, Amrita Dixit, Ashok Kumar, and Arjun Kumar. "Studies of Various Artificial Magnetic Conductor for 5G Applications." In Lecture Notes in Electrical Engineering, 523–30. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-2926-9_57.

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Madhav, B. T. P., T. V. Rama Krishna, K. Datta Sri Lekha, D. Bhavya, V. S. Dharma Teja, T. Mahender Reddy, and T. Anilkumar. "Multiband Semicircular Planar Monopole Antenna with Spiral Artificial Magnetic Conductor." In Lecture Notes in Electrical Engineering, 599–607. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-7329-8_61.

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Kassim, S., Hasliza A. Rahim, Mohamedfareq Abdulmalek, R. B. Ahmad, M. H. Jamaluddin, M. Jusoh, D. A. Mohsin, et al. "UWB Antenna with Artificial Magnetic Conductor (AMC) for 5G Applications." In Lecture Notes in Networks and Systems, 239–50. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-3172-9_24.

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Girish, K. B. N., Pani Prithvi Raj, M. Vijaya Krishna Teja, S. Anand, and D. Sriram Kumar. "A Novel Proposal of Artificial Magnetic Conductor Loaded Rectangular Patch Antenna for Wireless Applications." In Lecture Notes in Electrical Engineering, 467–75. New Delhi: Springer India, 2015. http://dx.doi.org/10.1007/978-81-322-2728-1_43.

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Kumar, Ashok, Arjun Kumar, Ashok Kumar, and M. V. Karthikeyan. "Design and Investigation of Octagonal Patch Antenna Using Artificial Magnetic Conductor for 5G Applications." In Lecture Notes in Electrical Engineering, 393–400. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-2926-9_44.

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Raviteja, G. Viswanadh. "A Quad-Port Orthogonal Wideband MIMO Antenna Employing Artificial Magnetic Conductor for 60 GHz Millimeter-Wave Applications." In Smart Antennas, 179–92. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-76636-8_14.

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9

Joshi, Abhishek, and Rahul Singhal. "Probe-Fed Polygonal Patch UWB Antennas." In UWB Technology - New Insights and Developments [Working Title]. IntechOpen, 2023. http://dx.doi.org/10.5772/intechopen.110369.

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The chapter deals with the design of probe-fed planar antennas to operate at wider bands and techniques to improve peak or boresight gain using reflectors. The phenomenon of frequency excitation in dual-band, that is, C-band and X-band using the technique of partial removal of the ground plane, is well demonstrated here. The impedance bandwidth achieved by the sample antenna is 285 MHz and 380 MHz, respectively. The reduced ground plane technique is further exploited along with modifications in the shape of the ground plane to cover the entire ultra-wideband (UWB) range in a probe-fed hexagonal monopole antenna. Due to the existence of higher modes and especially when fed with a probe, UWB antennas are only capable of providing mediocre gain at higher frequencies. An approach to increase the probe-fed hexagonal UWB antenna’s peak gain involves the utilization of an appropriate reflector. The antenna is given an artificial magnetic conductor (AMC)-based reflector, which increases the peak gain as well as boresight gain across a band ≤ UWB. Peak and boresight gains of 3.74 dB and 5.5 dB, respectively, are observed with AMC. The equivalent circuit model and simulated impedance results of the sample antennas are validated with the measurement results.
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Diaz, Rodolfo E., and Sergio A. Clavijo. "Artificial Magnetic Conductor." In Encyclopedia of RF and Microwave Engineering. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2005. http://dx.doi.org/10.1002/0471654507.eme551.

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Тези доповідей конференцій з теми "ARTIFICIAL MAGNETIC CONDUCTOR PLANE"

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Shiji Pan, E. R. Iglesias, and F. Capolino. "Artificial magnetic conductor from a layer of dogbone-shaped conductors over a ground plane." In 2010 IEEE International Symposium Antennas and Propagation and CNC-USNC/URSI Radio Science Meeting. IEEE, 2010. http://dx.doi.org/10.1109/aps.2010.5562260.

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2

van den Biggelaar, A. J., U. Johannsen, and A. B. Smolders. "Angular Stable Artificial Magnetic Conductor for Oblique Incident TM Plane Waves." In Loughborough Antennas & Propagation Conference 2018 (LAPC 2018). Institution of Engineering and Technology, 2018. http://dx.doi.org/10.1049/cp.2018.1437.

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Dewan, R., S. K. A. Rahim, S. F. Ausordin, M. Z. M. Nor, and B. M. Saad. "Crescent moon-shaped artificial magnetic conductor ground plane for patch antenna application." In 2013 IEEE Symposium on Wireless Technology & Applications (ISWTA). IEEE, 2013. http://dx.doi.org/10.1109/iswta.2013.6688782.

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Soh, Ping Jack, Sen Yan, and Guy A. E. Vandenbosch. "SAR mitigation of textile antenna via an artificial magnetic conductor (AMC) plane." In 2015 1st URSI Atlantic Radio Science Conference (URSI AT-RASC). IEEE, 2015. http://dx.doi.org/10.1109/ursi-at-rasc.2015.7303228.

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Qi Luo, Henrique M. Salgado, Artur M. Moura, and Jose R. Pereira. "Dual-band antenna design using an EBG Artificial Magnetic Conductor ground plane." In Propagation Conference (LAPC). IEEE, 2008. http://dx.doi.org/10.1109/lapc.2008.4516905.

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Mehrabani, Ali M., and Lotfollah Shafai. "A sual-arm Archimedean spiral antenna over a low-profile artificial magnetic conductor ground plane." In 2009 13th International Symposium on Antenna Technology and Applied Electromagnetics and the Canadian Radio Science Meeting (ANTEM/URSI 2009). IEEE, 2009. http://dx.doi.org/10.1109/antemursi.2009.4805090.

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Xie, M. T., Q. G. Guo, and K. M. Huang. "Design of a novel Artificial Magnetic Conductor plane and its application for low-profile dipole." In 2010 International Conference on Microwave and Millimeter Wave Technology (ICMMT). IEEE, 2010. http://dx.doi.org/10.1109/icmmt.2010.5525228.

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Foroozesh, Alireza, and Lotfollah Shafai. "Application of the artificial magnetic conductor ground plane for enhancement of antenna input impedance bandwidth." In 2009 IEEE Antennas and Propagation Society International Symposium (APSURSI). IEEE, 2009. http://dx.doi.org/10.1109/aps.2009.5171694.

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Yuan, Yan-Ning, Jiao-Jie Feng, and Xiao-Li Xi. "Design of wearable antenna with compact artificial magnetic conductor reflecting plate." In 2017 Sixth Asia-Pacific Conference on Antennas and Propagation (APCAP). IEEE, 2017. http://dx.doi.org/10.1109/apcap.2017.8420366.

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Sudesh Darak, Mayur, S. Anand, and D. Sriram Kumar. "Bandwidth enhancement of a patch antenna by loading complementary K-shaped artificial magnetic conductors in ground plane." In 2014 IEEE Asia-Pacific Conference on Applied Electromagnetics (APACE). IEEE, 2014. http://dx.doi.org/10.1109/apace.2014.7043786.

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