{"id":341,"date":"2012-11-16T23:26:04","date_gmt":"2012-11-17T01:26:04","guid":{"rendered":"http:\/\/efagundes.com\/openclass_networking\/?page_id=341"},"modified":"2022-01-16T17:50:56","modified_gmt":"2022-01-16T20:50:56","slug":"propagacao-das-ondas-de-radio","status":"publish","type":"page","link":"https:\/\/efagundes.com\/networking\/transmissao-sem-fio\/propagacao-das-ondas-de-radio\/","title":{"rendered":"Propaga\u00e7\u00e3o das ondas de r\u00e1dio"},"content":{"rendered":"<p><a href=\"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide73.jpg\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"2442\" data-permalink=\"https:\/\/efagundes.com\/networking\/transmissao-sem-fio\/propagacao-das-ondas-de-radio\/slide7-4\/\" data-orig-file=\"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide73.jpg?fit=960%2C720&amp;ssl=1\" data-orig-size=\"960,720\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"Slide7\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide73.jpg?fit=960%2C720&amp;ssl=1\" class=\"alignnone size-full wp-image-2442\" src=\"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide73.jpg?resize=960%2C720\" alt=\"Slide7\" width=\"960\" height=\"720\" srcset=\"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide73.jpg?w=960&amp;ssl=1 960w, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide73.jpg?resize=300%2C225&amp;ssl=1 300w\" sizes=\"auto, (max-width: 960px) 100vw, 960px\" \/><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"parent":329,"menu_order":5,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-341","page","type-page","status-publish","hentry"],"jetpack_shortlink":"https:\/\/wp.me\/P8yKGp-5v","jetpack-related-posts":[{"id":345,"url":"https:\/\/efagundes.com\/networking\/transmissao-sem-fio\/radio-digital\/","url_meta":{"origin":341,"position":0},"title":"R\u00e1dio Digital","author":"Eduardo Fagundes","date":"16\/11\/2012","format":false,"excerpt":"\u00a0 Usa ondas eletromagn\u00e9ticas (r\u00e1dio ou infravermelho) para transmitir informa\u00e7\u00e3o de um ponto a outro, sem necessitar de alguma uma conex\u00e3o f\u00edsica. Ondas de r\u00e1dio s\u00e3o geralmente referidas como portadoras de r\u00e1dio porque simplesmente fazem a fun\u00e7\u00e3o de entregar energia para um receptor remoto. O dado a ser transmitido \u00e9\u2026","rel":"","context":"Post similar","block_context":{"text":"Post similar","link":""},"img":{"alt_text":"Slide9","src":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide93.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide93.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide93.jpg?resize=525%2C300 1.5x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide93.jpg?resize=700%2C400 2x"},"classes":[]},{"id":354,"url":"https:\/\/efagundes.com\/networking\/transmissao-sem-fio\/ondas-de-infravermelho-e-milimetricas\/","url_meta":{"origin":341,"position":1},"title":"Ondas de infravermelho e milim\u00e9tricas","author":"Eduardo Fagundes","date":"16\/11\/2012","format":false,"excerpt":"\u00a0 Ondas infravermelhas s\u00e3o ondas milim\u00e9tricas, de alt\u00edssima freq\u00fc\u00eancia (invis\u00edveis a olho n\u00fa), amplamente utilizadas para comunica\u00e7\u00e3o em pequenas dist\u00e2ncias (controles remotos de aparelhos eletrodom\u00e9sticos utilizam esta tecnologia). Elas s\u00e3o relativamente direcionais, baratas e de baixa complexidade para gerar, transmitir e receber. Por\u00e9m, sofre de um grande problema: n\u00e3o atravessa\u2026","rel":"","context":"Post similar","block_context":{"text":"Post similar","link":""},"img":{"alt_text":"Slide13","src":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide133.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide133.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide133.jpg?resize=525%2C300 1.5x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide133.jpg?resize=700%2C400 2x"},"classes":[]},{"id":352,"url":"https:\/\/efagundes.com\/networking\/transmissao-sem-fio\/transmissao-de-microondas\/","url_meta":{"origin":341,"position":2},"title":"Transmiss\u00e3o de microondas","author":"Eduardo Fagundes","date":"16\/11\/2012","format":false,"excerpt":"\u00a0 Acima de 100 MHz, as ondas viajam em linhas retas e podem ser estreitamente focadas atrav\u00e9s do alinhamento do transmissor e receptor.\u00a0 Concentrando toda energia em um pequeno receptor, atrav\u00e9s de uma antena parab\u00f3lica (do tipo daquelas de TV por sat\u00e9lite), resulta em uma rela\u00e7\u00e3o sinal\/ru\u00eddo maior, mas as\u2026","rel":"","context":"Post similar","block_context":{"text":"Post similar","link":""},"img":{"alt_text":"Slide12","src":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide123.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide123.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide123.jpg?resize=525%2C300 1.5x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide123.jpg?resize=700%2C400 2x"},"classes":[]},{"id":331,"url":"https:\/\/efagundes.com\/networking\/transmissao-sem-fio\/ondas-e-energia\/","url_meta":{"origin":341,"position":3},"title":"Ondas e energia","author":"Eduardo Fagundes","date":"16\/11\/2012","format":false,"excerpt":"\u00a0 Voc\u00ea j\u00e1 deve ter atirado uma pedra em um lago, e mesmo que n\u00e3o o tenha feito, deve ter observado algum efeito semelhante. Quando atiramos uma pedra na \u00e1gua, ela agita a superf\u00edcie da \u00e1gua na forma de ondas. Estas ondas, na verdade, carregam a energia gerada pela queda\u2026","rel":"","context":"Post similar","block_context":{"text":"Post similar","link":""},"img":{"alt_text":"Slide2","src":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide214.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide214.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide214.jpg?resize=525%2C300 1.5x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide214.jpg?resize=700%2C400 2x"},"classes":[]},{"id":434,"url":"https:\/\/efagundes.com\/networking\/sistema-telefonico\/wll-wire-local-loop\/","url_meta":{"origin":341,"position":4},"title":"WLL Wire Local Loop","author":"Eduardo Fagundes","date":"17\/11\/2012","format":false,"excerpt":"\u00a0 A tecnologia WLL substitui, no todo ou em parte, os pares de cabos telef\u00f4nicos utilizados na conex\u00e3o do telefone do assinante at\u00e9 a central telef\u00f4nica. \u00c9 baseada em um terminal fixo que se comunica, via ondas de r\u00e1dio, com a central de telefonia p\u00fablica e que busca n\u00e3o utilizar\u2026","rel":"","context":"Post similar","block_context":{"text":"Post similar","link":""},"img":{"alt_text":"Slide20","src":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide203.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide203.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide203.jpg?resize=525%2C300 1.5x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide203.jpg?resize=700%2C400 2x"},"classes":[]},{"id":333,"url":"https:\/\/efagundes.com\/networking\/transmissao-sem-fio\/espectro-eletromagnetico-i\/","url_meta":{"origin":341,"position":5},"title":"Espectro eletromagn\u00e9tico (I)","author":"Eduardo Fagundes","date":"16\/11\/2012","format":false,"excerpt":"\u00a0 \u00a0 Quando el\u00e9trons se movem, eles criam ondas eletromagn\u00e9ticas que podem propagar-se atrav\u00e9s do espa\u00e7o livre, mesmo do v\u00e1cuo. Essas ondas foram inicialmente previstas pelo f\u00edsico brit\u00e2nico James Clerk Maxwell em 1865 e pela primeira vez produzidas pelo f\u00edsico alem\u00e3o Heinrich Hertz em 1887. O n\u00famero de oscila\u00e7\u00f5es por\u2026","rel":"","context":"Post similar","block_context":{"text":"Post similar","link":""},"img":{"alt_text":"Slide3","src":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide37.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide37.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide37.jpg?resize=525%2C300 1.5x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide37.jpg?resize=700%2C400 2x"},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/efagundes.com\/networking\/wp-json\/wp\/v2\/pages\/341","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/efagundes.com\/networking\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/efagundes.com\/networking\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/efagundes.com\/networking\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/efagundes.com\/networking\/wp-json\/wp\/v2\/comments?post=341"}],"version-history":[{"count":0,"href":"https:\/\/efagundes.com\/networking\/wp-json\/wp\/v2\/pages\/341\/revisions"}],"up":[{"embeddable":true,"href":"https:\/\/efagundes.com\/networking\/wp-json\/wp\/v2\/pages\/329"}],"wp:attachment":[{"href":"https:\/\/efagundes.com\/networking\/wp-json\/wp\/v2\/media?parent=341"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}