{"id":55427,"date":"2022-12-01T10:43:51","date_gmt":"2022-12-01T08:43:51","guid":{"rendered":"https:\/\/www.iemn.fr\/?p=55427"},"modified":"2022-12-01T10:44:03","modified_gmt":"2022-12-01T08:44:03","slug":"these-a-djouadi-antennes-et-metamateriaux-textiles-pour-la-recuperation-de-lenergie-electromagnetique-ambiante","status":"publish","type":"post","link":"https:\/\/www.iemn.fr\/en\/theses-2022\/these-a-djouadi-antennes-et-metamateriaux-textiles-pour-la-recuperation-de-lenergie-electromagnetique-ambiante.html","title":{"rendered":"THESE : A. DJOUADI \u2013 Antennes et m\u00e9tamat\u00e9riaux textiles pour la r\u00e9cup\u00e9ration de l\u2019\u00e9nergie \u00e9lectromagn\u00e9tique ambiante"},"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_1bnh1i4dbnsw1\" 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-55427'><div class='entry-content-wrapper clearfix'>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-av_heading-929bcc86eb9edbf18cf16f1367098598\">\n#top .av-special-heading.av-av_heading-929bcc86eb9edbf18cf16f1367098598{\nmargin:0 0 10px 0;\npadding-bottom:4px;\n}\nbody .av-special-heading.av-av_heading-929bcc86eb9edbf18cf16f1367098598 .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n.av-special-heading.av-av_heading-929bcc86eb9edbf18cf16f1367098598 .av-subheading{\nfont-size:15px;\n}\n<\/style>\n<div  class='av-special-heading av-av_heading-929bcc86eb9edbf18cf16f1367098598 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. DJOUADI \u2013 Antennes et m\u00e9tamat\u00e9riaux textiles pour la r\u00e9cup\u00e9ration de l\u2019\u00e9nergie \u00e9lectromagn\u00e9tique ambiante <\/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>A. DJOUADI <\/strong><\/p>\n<p>Soutenance : <strong>28 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>Ce travail de th\u00e8se vise \u00e0 r\u00e9aliser des structures \u00e0 base des m\u00e9tamat\u00e9riaux et de m\u00e9tasurfaces sur des substrats flexibles (Kapton et textile) pour la r\u00e9cup\u00e9ration d\u2019\u00e9nergie \u00e9lectromagn\u00e9tique ind\u00e9pendante de la polarisation de l\u2019onde incidente. Des antennes \u00e0 anneaux fendus (SRRs) et des m\u00e9tasurfaces \u00e0 dip\u00f4les crois\u00e9s ont \u00e9t\u00e9 \u00e9tudi\u00e9es par la simulation et exp\u00e9rimentalement pour un fonctionnement dans la bande de fr\u00e9quence ISM-2.4 GHz. Une antenne dip\u00f4le rectiligne \u00e0 SRRs de forme carr\u00e9e sur substrat Kapton ainsi que des antennes dip\u00f4les en forme de S \u00e0 SRRs circulaires fabriqu\u00e9es sur textile par broderie ont \u00e9t\u00e9 \u00e9tudi\u00e9es. Les antennes ont \u00e9t\u00e9 con\u00e7ues en ciblant deux objectifs bas\u00e9s sur la r\u00e9sonance des SRRs : la r\u00e9duction de la taille de l\u2019antenne et un fonctionnement multifr\u00e9quence. Pour les antennes en forme de S, les pertes de connexion ont \u00e9t\u00e9 r\u00e9duites en utilisant un dip\u00f4le en fil de cuivre fix\u00e9 par broderie sur le textile, alors que les SRRs ont \u00e9t\u00e9 brod\u00e9s en utilisant deux fils conducteurs diff\u00e9rents. Sur la base de simulations num\u00e9riques, une bonne adaptation d\u2019imp\u00e9dance d\u2019entr\u00e9e de l\u2019antenne et un fonctionnement \u00e0 deux fr\u00e9quences ont \u00e9t\u00e9 obtenus en analysant les r\u00e9sonances du dip\u00f4le et des SRRs ainsi que leur couplage. Ces r\u00e9sultats ont \u00e9t\u00e9 confirm\u00e9s exp\u00e9rimentalement avec deux r\u00e9sonances mesur\u00e9es \u00e0 2,5 GHz et 4,3 GHz pour l\u2019antenne \u00e0 SRRs carr\u00e9s sur Kapton et 1,8 et 2,2 GHz pour l\u2019antenne \u00e0 SRRs circulaires sur textile avec un coefficient de r\u00e9flexion S11 sup\u00e9rieur \u00e0 -20 dB et -31 dB, respectivement. Une m\u00e9tasurface qui repr\u00e9sente un r\u00e9cup\u00e9rateur d\u2019\u00e9nergie \u00e9lectromagn\u00e9tique bas\u00e9 sur des dip\u00f4les sym\u00e9triques crois\u00e9s int\u00e9grant des circuits de redressement (diodes Schottky) et de filtrage (circuits LC parall\u00e8le) pour la rectification RF\/DC, est aussi pr\u00e9sent\u00e9e. Une m\u00e9tasurface de 4\u00d74 dip\u00f4les crois\u00e9s sur un substrat de Kapton flexible a \u00e9t\u00e9 con\u00e7ue pour fonctionner dans la bande ISM-2.4 GHz. Au niveau de chaque dip\u00f4le crois\u00e9, une diode de redressement est int\u00e9gr\u00e9e dans chacune des branches ainsi qu\u2019un circuit LC parall\u00e8le accord\u00e9 \u00e0 la fr\u00e9quence de fonctionnement de 2.45 GHz. Ce circuit de filtrage permet d\u2019isoler chaque cellule \u00e9l\u00e9mentaire de la m\u00e9tasurface en RF et de collecter l\u2019ensemble des signaux DC collect\u00e9s par chaque cellule. La m\u00e9tasurface pr\u00e9sente un rendement maximum de conversion RF\/DC de l\u2019ordre de 40% en simulation et un rendement de conversion de 22% a \u00e9t\u00e9 mesur\u00e9 pour une m\u00e9tasurface charg\u00e9e par une r\u00e9sistance de 400 Ohms et pour une puissance incidente de 10 dBm. La tension DC collect\u00e9e s\u2019\u00e9l\u00e8ve alors \u00e0 plus de 4 V et diminue \u00e0 environ 1 V lorsque la m\u00e9tasurface est charg\u00e9e par une r\u00e9sistance de 50 Ohms.<\/p>\n<h5>Abstract:<\/h5>\n<p>This thesis work aims at realizing structures based on metamaterials and metasurfaces on flexible substrates (Kapton and textile) for the recovery of electromagnetic energy independent of the polarization of the incident wave. Split ring antennas (SRRs) and crossed dipole metasurfaces have been studied by simulation and experimentally for operation in the ISM-2.4 GHz frequency band. A straight dipole antenna with square shaped SRRs on Kapton substrate as well as S-shaped dipole antennas with circular SRRs fabricated on textile by embroidery were studied. The antennas were designed with two objectives based on the resonance of the SRRs: reduction of the antenna size and multi-frequency operation. For the S-shaped antennas, the connection losses were reduced by using a copper wire dipole embroidered on the textile, while the SRRs were embroidered using two different conductive wires. Based on numerical simulations, a good input impedance matching of the antenna and a two-frequency operation were obtained by analyzing the resonances of the dipole and the SRRs and their coupling. These results were confirmed experimentally with two resonances measured at 2.5 GHz and 4.3 GHz for the square SRRs antenna on Kapton and 1.8 and 2.2 GHz for the circular SRRs antenna on textile with a reflection coefficient S11 greater than -20 dB and -31 dB, respectively. A metasurface representing an electromagnetic energy recuperator based on crossed symmetric dipoles integrating rectifying (Schottky diodes) and filtering (parallel LC circuits) circuits for RF\/DC rectification is also presented. A metasurface of 4\u00d74 crossed dipoles on a flexible Kapton substrate has been designed to operate in the ISM-2.4 GHz band. At each crossed dipole, a rectifier diode is integrated in each branch as well as a parallel LC circuit tuned to the operating frequency of 2.45 GHz. This filtering circuit allows to isolate each elementary cell of the metasurface in RF and to collect all the DC signals collected by each cell. The metasurface presents a maximum RF\/DC conversion efficiency of about 40% in simulation and a conversion efficiency of 22% was measured for a metasurface loaded by a 400 Ohms resistor and for an incident power of 10 dBm. The collected DC voltage rises to more than 4 V and decreases to about 1 V when the metasurface is loaded by a 50 Ohm resistor.<\/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-55427","post","type-post","status-publish","format-standard","hentry","category-theses-2022"],"_links":{"self":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts\/55427","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=55427"}],"version-history":[{"count":0,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts\/55427\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/media?parent=55427"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/categories?post=55427"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/tags?post=55427"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}