{"id":52776,"date":"2018-03-09T22:40:26","date_gmt":"2018-03-09T22:40:26","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/diseno-de-antenas-monopolo-de-banda-ancha-mediantes-modelo-de-lineas-de-transmision\/"},"modified":"2018-03-09T22:40:26","modified_gmt":"2018-03-09T22:40:26","slug":"diseno-de-antenas-monopolo-de-banda-ancha-mediantes-modelo-de-lineas-de-transmision","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/radiocomunicaciones\/diseno-de-antenas-monopolo-de-banda-ancha-mediantes-modelo-de-lineas-de-transmision\/","title":{"rendered":"Dise\u00f1o de antenas monopolo de banda ancha mediantes modelo de lineas de transmision"},"content":{"rendered":"

Tesis doctoral de Daniel Valderas Gazquez <\/strong><\/h2>\n

Las nuevas demandas de dispositivos de banda ancha para transmisi\u00f3n de datos a alta velocidad, entre los que se incluyen los sistemas de transmisi\u00f3n pulsada, establecen nuevas pautas en el dise\u00f1o de sistemas de comunicaci\u00f3n y localizaci\u00f3n presentes y futuros. La disposici\u00f3n de redes de alta conectividad predispone al empleo de las convencionales e inal\u00e1mbricas conjugadas bajo el mismo sistema. Las ventajas de los sistemas inal\u00e1mbricos quedan patentes al analizar su alta versatilidad, su baja inversi\u00f3n inicial, el elevado n\u00famero de usuarios que justifique la instalaci\u00f3n del cable, y su capacidad de acceso a lugares remotos. Estas ventajas se ponen en entredicho cuando el factor limitante procede la velocidad de transmisi\u00f3n de datos que proporciona el sistema, cuyo cuello de botella suele ser el elemento radi ante. En una evoluci\u00f3n en el que se prima la compacidad de los dise\u00f1os en terminales y la lineal i dad de fase, las antenas que tradicionalmente se han considerado de banda ancha, como los arrays de dipolos logoperi\u00f3dicos, espirales y bocinas, no est\u00e1n en condiciones de dar respuesta a estas demandas. Las antenas monopolo que abandonan su concepci\u00f3n unifilar tradicional para banda estrecha, suponen una alternativa v\u00e1lida. La diferencia estriba en que, al no ser autosimilares a diferentes escalas, se separan de la l\u00ednea de las antenas consideradas como independientes con la frecuencia. Es entonces cuando muchos dise\u00f1os aportados de monopolos planos aparecen para optimizaci\u00f3n de ancho de banda en impedancia. Sin embargo, cuando se aborda el problema de la variabilidad del diagrama de radiaci\u00f3n con la frecuencia, o bien rara vez se est\u00e1 en condiciones de controlarla, o bien se aborda como cap\u00edtulo independiente a la adaptaci\u00f3n en banda ancha sin metodolog\u00eda globalizadora. Por ello, se ve necesario emplear un modelo lo suficientemente vers\u00e1til como para abarcar un dise\u00f1o tan complejo como el que consiga que cada par\u00e1metro de la antena sea lo m\u00e1s constante posible con la frecuencia. A la vez, deber\u00eda ser lo suficientemente apropiado como para proporcionar directrices de dise\u00f1o claras. Es lo que se consigue con el modelo de l\u00edneas de transmisi\u00f3n aplicado a antenas monopolo. En \u00e9l, se establece una analog\u00eda gr\u00e1fica sobre el diagrama de smith para lograr la adaptaci\u00f3n en banda ancha requerida mediante transformaciones geom\u00e9tricas del monopolo. \u00e9stas son compatibles con diferentes configuraciones monopolares que permiten precisar el diagrama de radiaci\u00f3n. Estabilidad de adaptaci\u00f3n y radiaci\u00f3n en banda ancha se abordan as\u00ed desde un mismo punto de vista. Ello permite establecer una metodolog\u00eda capaz de ofrecer un dise\u00f1o concreto que d\u00e9 respuesta a las especificaciones de ancho de banda requerido y omnidireccionalidad, cuando \u00e9sta se considera como factor de m\u00e9rito. En el presente trabajo se dise\u00f1an antenas de ancho de banda creciente desde 1.4 ghz con relaci\u00f3n entre extremos de 1:3.1, 1:3.7, 1:9, 1:16 y m\u00e1s de 1:37. Adem\u00e1s se demuestra para un mismo ancho de banda, c\u00f3mo se pueden lograr relaciones de omnidireccionalidad crecientes o controlables en todo o en parte del rango. Como hip\u00f3tesis de trabajo se emplea la tecnolog\u00eda ultra-wideband como fuente de especificaciones. Por ello la caracterizaci\u00f3n de las antenas se aborda no s\u00f3lo en t\u00e9rminos de coeficiente de reflexi\u00f3n u omnidireccionalidad del diagrama de radiaci\u00f3n, sino tambi\u00e9n de funci\u00f3n de transferencia de pulso y retraso de grupo. the new demands of broadband devices for high-speed data transmission establish new guidelines in the design of present and future communicati\u00f3n and location systems. In these devices, pul sed transmission systems are included. The establishment of high connectivity networks tends to the use of both conventional and wireless ones under the same system. The advantages of the wireless systems become clear when analyzing their high versatility, low initial investment, the high number of users whom the cable installation iustifies and the access capability to remote places. The question ari ses when tne constraint comes from the data transmission speed that the system provides, which is usually given by the antenna.%&\/Provided an evolution in which the design compactness in terminals and the phase linearity are primed, the antennas that traditionally have been considered as broadband, like logoperiodic di pole arrays, spirals and horns, cannot answer to these demands. The monopole antennas that leave their traditional one-dimensional character for narrow bandwidth offer a valid alternative. Since they are not self-similar at different scales, they keep asi de from the antennas considered as frequency independent. Then, many impedance broadband optimized planar monopoles appear. Nevertheless, when the radiation pattern variability problem with frequency is approached, either it can hardly be controlled or it is approached as an independent topic to the broadband matching without overall methodology. For that reason, a versatile enough model is needed to approach such a complex design as the one that achieves that each antenna parameter is most constant possible with frequency. Simultaneously, it would have to be suitable enough so as to provi de clear design clues. It is what is achieved with transmission line model applied to monopole antennas. In the model, a eraphical analogy is settled down on the smith chart to obtain the requi red roadband matching by means of monopole geom\u00e9tric transformations. These are compatible with different monopole configurations that define the radiation pattern. Thus, broadband matching and radiation stability are approached from the same point of view. Establishing a methodology is now possible, which can offer a concrete design that answers the requi red patterns and bandwidth specifi cations, in the current work, antennas of increasing bandwidth are designed from 1,4 ghz with ratio between \u00ablimits of 3.1:1, 3.7:1, 9:1, 16:1 and more than 37:1. Furthermore, for the same bandwidth, it is demonstrated how is it possible to achieve either increasingly or controlled omnidirectionality ratios within the impedance bandwidth. As work hypothesis is used the ultra-wideband technology as an point of specifi cations. For that reason the characterization of the antennas is approached not only by reflection coefficient or radiation pattern omnidireccionality, but also by pulse transfer function and group delay.<\/p>\n

 <\/p>\n

Datos acad\u00e9micos de la tesis doctoral \u00abDise\u00f1o de antenas monopolo de banda ancha mediantes modelo de lineas de transmision<\/strong>\u00ab<\/h3>\n
    \n
  • T\u00edtulo de la tesis:<\/strong>\u00a0 Dise\u00f1o de antenas monopolo de banda ancha mediantes modelo de lineas de transmision <\/li>\n
  • Autor:<\/strong>\u00a0 Daniel Valderas Gazquez <\/li>\n
  • Universidad:<\/strong>\u00a0 Navarra<\/li>\n
  • Fecha de lectura de la tesis:<\/strong>\u00a0 26\/05\/2006<\/li>\n<\/ul>\n

     <\/p>\n

    Direcci\u00f3n y tribunal<\/h3>\n
      \n
    • Director de la tesis<\/strong>\n
        \n
      • Juan Ignacio Sancho Seuma<\/li>\n<\/ul>\n<\/li>\n
      • Tribunal<\/strong>\n
          \n
        • Presidente del tribunal: pedro Crespo bofill <\/li>\n
        • alenjandro Valero noguera (vocal)<\/li>\n
        • enrique Masgrau gomez (vocal)<\/li>\n
        • Jaime Aguilera p\u00e9rez (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n

           <\/p>\n","protected":false},"excerpt":{"rendered":"

          Tesis doctoral de Daniel Valderas Gazquez Las nuevas demandas de dispositivos de banda ancha para transmisi\u00f3n de datos a alta […]<\/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":[17749,2488,41336,26598],"tags":[116446,116445,15974,52138,53579,82075],"class_list":["post-52776","post","type-post","status-publish","format-standard","hentry","category-navarra","category-radiocomunicaciones","category-receptores-de-radio","category-transmisores-de-radio","tag-alenjandro-valero-noguera","tag-daniel-valderas-gazquez","tag-enrique-masgrau-gomez","tag-jaime-aguilera-perez","tag-juan-ignacio-sancho-seuma","tag-pedro-crespo-bofill"],"_links":{"self":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts\/52776","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=52776"}],"version-history":[{"count":0,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts\/52776\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/media?parent=52776"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/categories?post=52776"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/tags?post=52776"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}