{"id":95485,"date":"2018-03-11T10:15:28","date_gmt":"2018-03-11T10:15:28","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/high-resolution-algorithms-for-the-reconstruction-of-the-equivalent-currents-of-an-antenna-by-means-of-modal-theory-and-a-priori-information\/"},"modified":"2018-03-11T10:15:28","modified_gmt":"2018-03-11T10:15:28","slug":"high-resolution-algorithms-for-the-reconstruction-of-the-equivalent-currents-of-an-antenna-by-means-of-modal-theory-and-a-priori-information","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/electromagnetismo\/high-resolution-algorithms-for-the-reconstruction-of-the-equivalent-currents-of-an-antenna-by-means-of-modal-theory-and-a-priori-information\/","title":{"rendered":"High-resolution algorithms for the reconstruction of the equivalent currents of an antenna by means of modal theory and a priori information"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Daniel S\u00e1nchez Escuderos <\/strong><\/h2>\n<p>El objetivo del diagn\u00f3stico de antenas es la detecci\u00f3n de errores en antena fabricadas. Dado que este diagn\u00f3stico es dif\u00edcil de realizar simplemente observando medidas de campo, el diagn\u00f3stico se realiza usando las corrientes equivalentes reconstruidas en una superficie pr\u00f3xima a la antena. Esta tesis describe diferentes posibilidades de realizar esta reconstrucci\u00f3n en una superficie plana a partir de medidas esf\u00e9ricas en campo pr\u00f3ximo. En concreto, se estudian extensivamente, y se aplican a situaciones reales, las t\u00e9cnicas de la expansi\u00f3n modal. el problema principal de las t\u00e9cnicas modales es la limitaci\u00f3n en la resoluci\u00f3n de las corrientes equivalentes. La raz\u00f3n de esta limitaci\u00f3n es la peque\u00f1a regi\u00f3n disponible del espectro de ondas planas (cuya transformada de fourier son las corrientes equivalentes). En esta tesis se estudia este problema, se muestran varios ejemplos y se describen las posibilidades de mejorar la resoluci\u00f3n. De entre estas posibilidades, se propone el uso de una t\u00e9cnica de extrapolaci\u00f3n con la que estimar el espectro no visible a partir de la regi\u00f3n conocida (el espectro visible) y de informaci\u00f3n adicional sobre la antena como, por ejemplo, el tama\u00f1o de la antena. entre las diferentes t\u00e9cnicas de extrapolaci\u00f3n, se describen y comparan las t\u00e9cnicas m\u00e1s usadas com\u00fanmente. En primer lugar, se aplica el algoritmo iterativo de papoulis-gerchberg usando el tama\u00f1o y la forma de la antena. Despu\u00e9s se describen las versiones directas de este algoritmo, es decir la matriz de extrapolaci\u00f3n por filas y columnas y la matriz de extrapolaci\u00f3n generalizada. Finalmente, se estudia la transformaci\u00f3n pdft y se compara con los algoritmos anteriores. Todas estas t\u00e9cnicas son aplicadas en situaciones reales con una importante mejora en la resoluci\u00f3n. el \u00faltimo cap\u00edtulo de esta tesis trata de los procedimientos de calibraci\u00f3n de sonda. Estos procedimientos son especialmente importantes en el diagn\u00f3stico de antenas ya que permiten tener en cuenta el efecto de la sonda en la medida de campo. De este modo, se puede llevar a cabo el mejor diagn\u00f3stico de la antena bajo estudio. En esta tesis se describe el algoritmo iterativo de calibraci\u00f3n de sondas propuesto por hansen. Adem\u00e1s se proponen varias alternativas a este algoritmo para tres situaciones diferentes. Estas t\u00e9cnicas son verificadas en situaciones reales con resultados bastante buenos.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>High-resolution algorithms for the reconstruction of the equivalent currents of an antenna by means of modal theory and a priori information<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 High-resolution algorithms for the reconstruction of the equivalent currents of an antenna by means of modal theory and a priori information <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Daniel S\u00e1nchez Escuderos <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Polit\u00e9cnica de Valencia<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 21\/07\/2009<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li>Mar\u00eda no Baquero Escudero<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Miguel Ferrando bataller <\/li>\n<li>Manuel Sierra casta\u00f1er (vocal)<\/li>\n<li>lLuis Jofre roca (vocal)<\/li>\n<li>Fernando Las heras andr\u00e9s (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Daniel S\u00e1nchez Escuderos El objetivo del diagn\u00f3stico de antenas es la detecci\u00f3n de errores en antena fabricadas. [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"footnotes":""},"categories":[14043,987,16820],"tags":[196404,38003,15962,179634,16846,15964],"class_list":["post-95485","post","type-post","status-publish","format-standard","hentry","category-antenas","category-electromagnetismo","category-politecnica-de-valencia","tag-daniel-sanchez-escuderos","tag-fernando-las-heras-andres","tag-lluis-jofre-roca","tag-manuel-sierra-castaner","tag-maria-no-baquero-escudero","tag-miguel-ferrando-bataller"],"_links":{"self":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts\/95485","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/comments?post=95485"}],"version-history":[{"count":0,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts\/95485\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/media?parent=95485"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/categories?post=95485"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/tags?post=95485"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}