{"id":55421,"date":"2023-02-03T18:14:07","date_gmt":"2023-02-03T16:14:07","guid":{"rendered":"https:\/\/www.iemn.fr\/?p=55421"},"modified":"2023-02-03T18:14:07","modified_gmt":"2023-02-03T16:14:07","slug":"these-a-ghaddar-guidage-dondes-de-surface-sur-des-metamateriaux-textiles","status":"publish","type":"post","link":"https:\/\/www.iemn.fr\/en\/theses-2022\/these-a-ghaddar-guidage-dondes-de-surface-sur-des-metamateriaux-textiles.html","title":{"rendered":"THESIS: A. GHADDAR - Surface wave guidance on textile metamaterials"},"content":{"rendered":"<div id='layer_slider_1'  class='avia-layerslider main_color avia-shadow  avia-builder-el-0  el_before_av_heading  avia-builder-el-first  container_wrap sidebar_right'  style='height: 261px;'  ><div id=\"layerslider_58_9v6ad7kszovc\" data-ls-slug=\"homepageslider\" class=\"ls-wp-container fitvidsignore ls-selectable\" style=\"width:1140px;height:260px;margin:0 auto;margin-bottom: 0px;\"><div class=\"ls-slide\" data-ls=\"duration:6000;transition2d:5;\"><img loading=\"lazy\" decoding=\"async\" width=\"2600\" height=\"270\" src=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1.jpg\" class=\"ls-bg\" alt=\"\" srcset=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1.jpg 2600w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1-300x31.jpg 300w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1-768x80.jpg 768w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1-1030x107.jpg 1030w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1-1500x156.jpg 1500w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1-705x73.jpg 705w\" sizes=\"auto, (max-width: 2600px) 100vw, 2600px\" \/><ls-layer style=\"font-size:14px;text-align:left;font-style:normal;text-decoration:none;text-transform:none;font-weight:700;letter-spacing:0px;border-style:solid;border-color:#000;background-position:0% 0%;background-repeat:no-repeat;width:180px;height:30px;left:0px;top:231px;line-height:32px;color:#ffffff;border-radius:6px 6px 6px 6px;padding-left:50px;background-color:rgba(0, 0, 0, 0.57);\" class=\"ls-l ls-ib-icon ls-text-layer\" data-ls=\"minfontsize:0;minmobilefontsize:0;\"><i class=\"fa fa-quote-right\" style=\"color:#ffffff;margin-right:0.8em;font-size:1em;transform:translateY( -0.125em );\"><\/i>ACTUALITES<\/ls-layer><\/div><\/div><\/div><div id='after_layer_slider_1'  class='main_color av_default_container_wrap container_wrap sidebar_right'  ><div class='container av-section-cont-open' ><div class='template-page content  av-content-small alpha units'><div class='post-entry post-entry-type-page post-entry-55421'><div class='entry-content-wrapper clearfix'>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-av_heading-1b4b95b86b19729a0ca867ec18f0bd7e\">\n#top .av-special-heading.av-av_heading-1b4b95b86b19729a0ca867ec18f0bd7e{\nmargin:0 0 10px 0;\npadding-bottom:4px;\n}\nbody .av-special-heading.av-av_heading-1b4b95b86b19729a0ca867ec18f0bd7e .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n.av-special-heading.av-av_heading-1b4b95b86b19729a0ca867ec18f0bd7e .av-subheading{\nfont-size:15px;\n}\n<\/style>\n<div  class='av-special-heading av-av_heading-1b4b95b86b19729a0ca867ec18f0bd7e av-special-heading-h2  avia-builder-el-1  el_after_av_layerslider  el_before_av_hr  avia-builder-el-first'><h2 class='av-special-heading-tag'  itemprop=\"headline\"  >THESE : A. GHADDAR &#8211; Guidage d\u2019ondes de surface sur des m\u00e9tamat\u00e9riaux textiles <\/h2><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-18u73nj-dad6a947580930e400fc42ba200e80f1\">\n#top .hr.av-18u73nj-dad6a947580930e400fc42ba200e80f1{\nmargin-top:5px;\nmargin-bottom:5px;\n}\n.hr.av-18u73nj-dad6a947580930e400fc42ba200e80f1 .hr-inner{\nwidth:100%;\n}\n<\/style>\n<div  class='hr av-18u73nj-dad6a947580930e400fc42ba200e80f1 hr-custom  avia-builder-el-2  el_after_av_heading  el_before_av_textblock  hr-left hr-icon-no'><span class='hr-inner inner-border-av-border-thin'><span class=\"hr-inner-style\"><\/span><\/span><\/div>\n<section  class='av_textblock_section av-jriy64i8-2f4600354c0449b610997916bbd9b6bc'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" >\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-13ewzjw-68e036126b913e5028f77311dc66b825\">\n.av_font_icon.av-13ewzjw-68e036126b913e5028f77311dc66b825{\ncolor:#bfbfbf;\nborder-color:#bfbfbf;\n}\n.av_font_icon.av-13ewzjw-68e036126b913e5028f77311dc66b825 .av-icon-char{\nfont-size:60px;\nline-height:60px;\n}\n<\/style>\n<span  class='av_font_icon av-13ewzjw-68e036126b913e5028f77311dc66b825 avia_animate_when_visible av-icon-style- avia-icon-pos-left avia-icon-animate'><span class='av-icon-char' aria-hidden='true' data-av_icon='\ue8c9' data-av_iconfont='entypo-fontello' ><\/span><\/span>\n<p><strong>\u00a0A. GHADDAR<\/strong><\/p>\n<p>Soutenance : <strong>23 Mars 2022<br \/>\n<\/strong><span class=\"titre\">Th\u00e8se de doctorat en Electronique, micro\u00e9lectronique, nano\u00e9lectronique et micro-ondes, Universit\u00e9 de Lille, ENGSYS Sciences de l\u2019ing\u00e9nierie et des syst\u00e8mes.<\/span><\/p>\n<\/div><\/section>\n<section  class='av_textblock_section av-jtefqx33-628129dba2299b2ecd65ebfc92eac29d'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><div  class='hr av-kjh3zw-4dff888f744b728a1aca9b3a0971493a hr-default  avia-builder-el-6  avia-builder-el-no-sibling'><span class='hr-inner'><span class=\"hr-inner-style\"><\/span><\/span><\/div>\n<h5>Summary:<\/h5>\n<p>Les travaux pr\u00e9sent\u00e9s dans cette th\u00e8se sont consacr\u00e9s \u00e0 l\u2019\u00e9tude du guidage d\u2019ondes de surface sur des m\u00e9tamat\u00e9riaux fabriqu\u00e9s sur textile \u00e0 base de fils conducteurs. Ces \u00e9tudes ont pour objectif principal de contribuer au d\u00e9veloppement des technologies d\u00e9di\u00e9es aux ondes de surface sur des textiles pour les applications de communication autour du corps humain fonctionnant \u00e0 2.45 GHz. L\u2019existence de l\u2019onde de surface est connue davantage dans le domaine de l\u2019optique par le plasmon polariton de surface qui se propage naturellement sur la surface du m\u00e9tal. L\u2019onde de surface est caract\u00e9ris\u00e9e par un champ \u00e9lectromagn\u00e9tique confin\u00e9 \u00e0 la surface du m\u00e9tal et par une vitesse de propagation lente par rapport \u00e0 la vitesse de propagation en espace libre. Afin de b\u00e9n\u00e9ficier de ces propri\u00e9t\u00e9s, le domaine des m\u00e9tamat\u00e9riaux permet d\u2019\u00e9tendre ce concept vers les basses fr\u00e9quences gr\u00e2ce \u00e0 un arrangement p\u00e9riodique de motifs m\u00e9talliques. Les \u00e9tudes pr\u00e9sent\u00e9es dans cette th\u00e8se se focalisent sur la propagation d\u2019une onde de surface sur des lignes corrugu\u00e9es ou \u00e0 m\u00e9andre sans plan de masse, et sur des m\u00e9tasurfaces \u00e0 deux dimensions. Les ondes de surface ont \u00e9t\u00e9 excit\u00e9es en champ proche par des antennes dip\u00f4les. Des lignes et m\u00e9tasurfaces ont \u00e9t\u00e9 fabriqu\u00e9es en technologie de circuit imprim\u00e9 PCB, et d\u2019autres sur des textiles \u00e0 l\u2019aide de techniques de fabrications conventionnelles largement utilis\u00e9es dans le domaine textile \u00e0 savoir la broderie et le tricot 3D dit spacer. Les performances en termes de transmission et de diagramme de dispersion de l\u2019onde \u00e9lectromagn\u00e9tique sur les diff\u00e9rentes structures textiles sont analys\u00e9es en d\u00e9tails exp\u00e9rimentalement et en simulation. Elles sont aussi compar\u00e9es aux performances des structures sur PCB. Les lignes en m\u00e9andre et les m\u00e9tasurfaces brod\u00e9es sur un textile en coton ont r\u00e9v\u00e9l\u00e9 de bonnes performances avec une am\u00e9lioration de la transmission entre les antennes comparativement \u00e0 la transmission en espace libre. Les performances de transmission d\u2019une ligne en m\u00e9andre sous courbures ont aussi \u00e9t\u00e9 \u00e9valu\u00e9es exp\u00e9rimentalement dans l\u2019objectif des communications autour du corps humain. L\u2019ensemble des travaux pr\u00e9sent\u00e9s est bas\u00e9 sur des \u00e9tudes de simulation v\u00e9rifi\u00e9es exp\u00e9rimentalement en d\u00e9terminant d\u2019une part les courbes de dispersion et d\u2019autre part les propri\u00e9t\u00e9s de transmission.<\/p>\n<h5>Abstract:<\/h5>\n<p>The work presented in this thesis is devoted to the study of surface wave guidance on textile metamaterials based on conductive threads. The main objective of these studies is to contribute to the development of technologies dedicated to surface waves on textiles for communication applications around the human body operating at 2.45 GHz. The existence of the surface wave is known more in the field of optics by the surface plasmon polariton which propagates naturally on the surface of the metal. The surface wave is characterized by an electromagnetic field confined to the metal surface and by a slow propagation speed compared to the propagation speed in free space. In order to benefit from these properties, the field of metamaterials allows to extend this concept to low frequencies thanks to a periodic arrangement of metallic patterns. The studies presented in this thesis focus on the propagation of a surface wave on corrugated or meandering lines without ground plane, and on two-dimensional metasurfaces. The surface waves were excited in the near field by dipole antennas. Lines and metasurfaces were fabricated on PCB technology, and others on textiles using conventional fabrication techniques widely used in the textile field, namely embroidery and 3D knitting called spacer. The performances in terms of transmission and dispersion diagram of the electromagnetic wave on the various textile structures are analyzed in detail experimentally and in simulation. They are also compared to the performances of the structures on PCB. Meander lines and metasurfaces embroidered on a cotton textile showed good performance with improved transmission between antennas compared to free space transmission. The transmission performance of a meander line under curvature has also been experimentally evaluated for the purpose of communications around the human body. All the presented work is based on simulation studies verified experimentally by determining on the one hand the dispersion curves and on the other hand the transmission properties.<\/p>\n<\/div><\/section>","protected":false},"excerpt":{"rendered":"","protected":false},"author":20,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[316],"tags":[],"class_list":["post-55421","post","type-post","status-publish","format-standard","hentry","category-theses-2022"],"_links":{"self":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts\/55421","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/users\/20"}],"replies":[{"embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/comments?post=55421"}],"version-history":[{"count":0,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts\/55421\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/media?parent=55421"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/categories?post=55421"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/tags?post=55421"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}