{"id":429282,"date":"2023-08-10T10:04:51","date_gmt":"2023-08-10T08:04:51","guid":{"rendered":"https:\/\/www.eenewseurope.com\/?p=429282"},"modified":"2023-08-10T10:04:51","modified_gmt":"2023-08-10T08:04:51","slug":"un-radar-100-fois-plus-precis-grace-a-une-technique-quantique","status":"publish","type":"post","link":"https:\/\/www.ecinews.fr\/fr\/un-radar-100-fois-plus-precis-grace-a-une-technique-quantique\/","title":{"rendered":"Un radar 100 fois plus pr\u00e9cis gr\u00e2ce \u00e0 une technique quantique"},"content":{"rendered":"<h4>Des chercheurs am\u00e9ricains affirment avoir r\u00e9alis\u00e9 une perc\u00e9e fondamentale qui accro\u00eet les performances des syst\u00e8mes radar gr\u00e2ce \u00e0 la superposition quantique.<\/h4>\n<p>Les chercheurs de l&rsquo;universit\u00e9 Chapman et d&rsquo;autres institutions am\u00e9liorent la r\u00e9solution de la distance entre les objets dans une avanc\u00e9e majeure pour le radar, d\u00e9montrant une r\u00e9solution de la distance plus de 100 fois sup\u00e9rieure \u00e0 la limite longtemps suppos\u00e9e.<\/p>\n<p>Cela rompt le compromis traditionnel entre la r\u00e9solution et la longueur d&rsquo;onde, permettant aux op\u00e9rateurs d&rsquo;utiliser de grandes longueurs d&rsquo;onde et d&rsquo;obtenir une r\u00e9solution spatiale \u00e9lev\u00e9e.<\/p>\n<p>Cette premi\u00e8re exp\u00e9rience visant une d\u00e9monstration de principe ouvre un nouveau domaine de recherche avec de nombreuses applications possibles qui peuvent cr\u00e9er une technologie de rupture dans l&rsquo;industrie du radar, depuis les voitures sans conducteur ou la d\u00e9tection m\u00e9dicale jusqu&rsquo;aux technologies des processus industriels.<\/p>\n<ul>\n<li><a href=\"https:\/\/www.eenewseurope.com\/en\/radar-measurements-in-energy-and-process-industries\/\">Mesures radar dans les industries de l&rsquo;\u00e9nergie et des proc\u00e9d\u00e9s<\/a><\/li>\n<li><a href=\"https:\/\/www.eenewseurope.com\/en\/ai-3d-antenna-boost-for-driverless-car-radar\/\">L&rsquo;IA et l&rsquo;antenne 3D au service du radar de 79 GHz pour les voitures sans conducteur <\/a><\/li>\n<\/ul>\n<p>\u00ab\u00a0Nous pensons que ce travail ouvrira la voie \u00e0 une multitude de nouvelles applications et am\u00e9liorera les technologies existantes\u00a0\u00bb, d\u00e9clare John Howell, chercheur principal. \u00ab\u00a0La possibilit\u00e9 d&rsquo;un d\u00e9minage humanitaire efficace ou d&rsquo;une d\u00e9tection m\u00e9dicale non invasive \u00e0 haute r\u00e9solution est tr\u00e8s motivante\u00a0\u00bb, a-t-il d\u00e9clar\u00e9.<\/p>\n<p>Howell et une \u00e9quipe de chercheurs de l&rsquo;Institut d&rsquo;\u00e9tudes quantiques de l&rsquo;universit\u00e9 Chapman, de l&rsquo;universit\u00e9 h\u00e9bra\u00efque de J\u00e9rusalem, de l&rsquo;universit\u00e9 de Rochester, de l&rsquo;Institut Perimeter et de l&rsquo;universit\u00e9 de Waterloo ont utilis\u00e9 des fonctions utilisant la superposition de formes d&rsquo;ondes sp\u00e9cialement con\u00e7ues pour mesurer des variations extr\u00eamement faibles de la forme d&rsquo;onde afin de pr\u00e9dire avec pr\u00e9cision la distance entre deux objets, tout en \u00e9tant r\u00e9sistant aux pertes d&rsquo;absorption.<\/p>\n<p>Le radar de rupture utilise des impulsions personnalis\u00e9es pour g\u00e9n\u00e9rer un nouveau type d&rsquo;impulsions superpos\u00e9es, cr\u00e9ant une onde composite avec des caract\u00e9ristiques uniques de sous-longueur d&rsquo;onde qui peuvent \u00eatre utilis\u00e9es pour calculer la distance entre les objets.<\/p>\n<ul>\n<li><a href=\"https:\/\/www.eenewseurope.com\/en\/tiny-highly-integrated-60-ghz-radar-sensor\/\">Petit capteur radar 60 GHz hautement int\u00e9gr\u00e9<\/a><\/li>\n<li><a href=\"https:\/\/www.eenewseurope.com\/en\/materials-boost-for-adas-radar\/\">Des mat\u00e9riaux pour les radars ADAS<\/a><\/li>\n<\/ul>\n<p>\u00ab\u00a0Dans le domaine de la radiotechnique, les interf\u00e9rences sont un gros mot et sont consid\u00e9r\u00e9es comme un effet n\u00e9faste. Ici, nous renversons cette attitude et utilisons les effets d&rsquo;interf\u00e9rence des ondes pour d\u00e9passer de plusieurs ordres de grandeur la limite de port\u00e9e des radars\u00a0\u00bb, explique Andrew Jordan, directeur des \u00e9tudes quantiques \u00e0 l&rsquo;universit\u00e9 Chapman.<\/p>\n<p>\u00ab\u00a0Dans la d\u00e9tection radar \u00e0 distance, seule une petite partie du rayonnement \u00e9lectromagn\u00e9tique est renvoy\u00e9e au d\u00e9tecteur. Les formes d&rsquo;onde personnalis\u00e9es que nous avons con\u00e7ues ont la propri\u00e9t\u00e9 importante d&rsquo;\u00eatre autor\u00e9f\u00e9renc\u00e9es, de sorte que les propri\u00e9t\u00e9s de la cible peuvent \u00eatre distingu\u00e9es de la perte de signal\u00a0\u00bb.<\/p>\n<p>\u00ab\u00a0Nous nous effor\u00e7ons maintenant de d\u00e9montrer qu&rsquo;il est possible de mesurer non seulement la distance entre deux objets, mais aussi entre plusieurs objets ou de proc\u00e9der \u00e0 une caract\u00e9risation d\u00e9taill\u00e9e des surfaces\u00a0\u00bb, a d\u00e9clar\u00e9 M. Howell.<\/p>\n<p>L&rsquo;article est disponible \u00e0 l&rsquo;adresse suivante : <a href=\"https:\/\/journals.aps.org\/prl\/abstract\/10.1103\/PhysRevLett.131.053803\">journals.aps.org\/prl\/abstract\/10.1103\/PhysRevLett.131.053803<\/a>.<\/p>\n<p><a href=\"http:\/\/www.chapman.edu\/\">www.chapman.edu<\/a><\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Des chercheurs am\u00e9ricains affirment avoir r\u00e9alis\u00e9 une perc\u00e9e fondamentale qui accro\u00eet les performances des syst\u00e8mes radar gr\u00e2ce \u00e0 la superposition quantique. Les chercheurs de l&rsquo;universit\u00e9 Chapman et d&rsquo;autres institutions am\u00e9liorent la r\u00e9solution de la distance entre les objets dans une avanc\u00e9e majeure pour le radar, d\u00e9montrant une r\u00e9solution de la distance plus de 100 fois [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":428846,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[883],"tags":[1603,4338],"domains":[47],"ppma_author":[3640],"class_list":["post-429282","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technologies","tag-quantique","tag-radars","domains-electronique-eci"],"acf":[],"yoast_head":"<title>Un radar 100 fois plus pr\u00e9cis gr\u00e2ce \u00e0 une technique quantique ...<\/title>\n<meta name=\"description\" content=\"Des chercheurs ont utilis\u00e9 la superposition quantique pour am\u00e9liorer de 100 fois la 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