{"id":50459,"date":"2022-02-10T11:33:05","date_gmt":"2022-02-10T09:33:05","guid":{"rendered":"https:\/\/www.iemn.fr\/?p=50459"},"modified":"2022-04-28T12:42:32","modified_gmt":"2022-04-28T10:42:32","slug":"these-de-amine-rami-djouadi-antennes-et-metamateriaux-textiles-pour-la-recuperation-de-lenergie-electromagnetique-ambiante","status":"publish","type":"post","link":"https:\/\/www.iemn.fr\/en\/actualites\/these-de-amine-rami-djouadi-antennes-et-metamateriaux-textiles-pour-la-recuperation-de-lenergie-electromagnetique-ambiante.html","title":{"rendered":"Th\u00e8se de Amine Rami Djouadi \u2013 \u00ab\u00a0Antennes et m\u00e9tamat\u00e9riaux textiles pour la r\u00e9cup\u00e9ration de l\u2019\u00e9nergie \u00e9lectromagn\u00e9tique ambiante\u00a0\u00bb"},"content":{"rendered":"<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-24ezuj-a10f26575bd88f04b190ee82b2441fdb\">\n.flex_column.av-24ezuj-a10f26575bd88f04b190ee82b2441fdb{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-24ezuj-a10f26575bd88f04b190ee82b2441fdb av_one_full  avia-builder-el-0  avia-builder-el-no-sibling  first flex_column_div av-zero-column-padding'     ><section  class='av_textblock_section av-kzgs6ofx-56d311bc25de60bc7ceb1be6302e98ee'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><h4 style=\"text-align: center;\">Th\u00e8se de Amine Rami DJOUADI<\/h4>\n<h4 style=\"text-align: center;\">\u00ab\u00a0Antennes et m\u00e9tamat\u00e9riaux textiles pour la r\u00e9cup\u00e9ration de l\u2019\u00e9nergie \u00e9lectromagn\u00e9tique ambiante\u00a0\u00bb<\/h4>\n<blockquote><p>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-ikveov-92c0e1e8a70f730b34d6ee48b092e96b\">\n.av_font_icon.av-ikveov-92c0e1e8a70f730b34d6ee48b092e96b .av-icon-char{\nfont-size:30px;\nline-height:30px;\n}\n<\/style>\n<span  class='av_font_icon av-ikveov-92c0e1e8a70f730b34d6ee48b092e96b avia_animate_when_visible av-icon-style- avia-icon-pos-left av-no-color avia-icon-animate'><span class='av-icon-char' aria-hidden='true' data-av_icon='\ue8c9' data-av_iconfont='entypo-fontello' ><\/span><\/span>Soutenance le 28 mars 2022 \u00e0 10h30<br \/>\nIEMN Amphitheatre - Central Laboratory - Villeneuve d'Ascq<\/p>\n<\/blockquote>\n<h5>Jury :<\/h5>\n<p>T\u00e2n-Phu VUONG, Professeur, IMEP LAHC, Universit\u00e9 Grenoble Alpes, Rapporteur<br \/>\nH\u00e9l\u00e8ne ROUSSEL, Professeur, GeePs, Sorbonne Universit\u00e9, Rapporteur<br \/>\nHerv\u00e9 AUBERT, Professeur, LAAS, INP Toulouse, Examinateur<br \/>\nDivitha SEETHARAMDOO, Directeur, Charg\u00e9e de recherche, Universit\u00e9 Gustave Eiffel, Examinateur<br \/>\nEric LHEURETTE, Professeur, IEMN, Universit\u00e9 de Lille, Directeur de th\u00e8se<br \/>\nLudovic BURGNIES, Director, IEMN, Universit\u00e9 du Littoral-C\u00f4te d'Opale, Co-supervisor<br \/>\nC\u00e9dric COCHRANE, Directeur, GEMTEX, ENSAIT, Invit\u00e9<\/p>\n<h5>Abstract<\/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.<br \/>\nCes 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 to produce structures based on metamaterials and metasurfaces fabricated on flexible substrates (Kapton and textile) for electromagnetic energy harvesting invariant with the incident wave polarization. Split Ring Resonators (SRRs) and metasurfaces with crossed dipoles have been studied by simulation and in experiments for an ISM-2.4 GHz frequency band operation. A straight dipole antenna with square-shaped SRRs on Kapton substrate and S-shaped dipole antennas with circular-shaped SRRs manufactured on textile by embroidery have been studied. The antennas have been designed with two objectives by means of the SRRs resonance: a size reduction of the antenna and a multifrequency operation. For the S-shaped antennas, connection losses have been decreased by using a copper wire dipole fixed by embroidery on the textile, whereas the SRRs have been embroidered by using two different conductive yarns. Based on numerical simulations, a good impedance matching of the antenna and a double frequency operation have been obtained by analyzing the dipole and SRRs resonances and their coupling.<\/p>\n<p>These results have been experimentally validated with two resonances measured at 2.5 GHz and 4.3 GHz for the antenna with square-shaped SRR on Kapton and 1.8 and 2.2 GHz for the antenna with circular-shaped SRR on textile with a reflection coefficient S11 greater than -20 dB and -31 dB, respectively. A metasurface, which is an electromagnetic energy harvester based on symmetric crossed dipoles integrating a rectifier circuit (Schottky diodes) and a filter (parallel LC circuits) for RF \/ DC conversion, is also shown. A 4\u00d74 cross resonators array has been designed on flexible Kapton substrate in order to operate in the ISM-2.4 GHz band. In each crossed dipole, a rectifier diode is integrated in each of the arms as well as a parallel LC filter tuned to 2.45 GHz. The LC filter makes it possible to isolate each elementary cell of the metasurface in RF and to take benefit of the DC signals collected by each unit cell. A maximum conversion efficiency of around 40% has been predicted by simulation, and 22% has been measured for a metasurface loaded by a resistance of 400 Ohms and for an incident power of 10 dBm. Then, a DC voltage of 4 V has been measured when the metasurface is loaded by a 400 Ohms impedance and this value is decreased down to 1 V when the metasurface is loaded by a 50 Ohms impedance.<\/p>\n<\/div><\/section><\/div>","protected":false},"excerpt":{"rendered":"","protected":false},"author":2,"featured_media":34921,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"class_list":["post-50459","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites"],"_links":{"self":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts\/50459","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\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/comments?post=50459"}],"version-history":[{"count":0,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts\/50459\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/media\/34921"}],"wp:attachment":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/media?parent=50459"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/categories?post=50459"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/tags?post=50459"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}