{"id":597,"date":"2020-04-29T12:23:56","date_gmt":"2020-04-29T10:23:56","guid":{"rendered":"http:\/\/f6kmf.fr\/?p=597"},"modified":"2020-04-29T12:23:58","modified_gmt":"2020-04-29T10:23:58","slug":"optimisation-dantenne-parabolique","status":"publish","type":"post","link":"https:\/\/f6kmf.fr\/index.php\/2020\/04\/29\/optimisation-dantenne-parabolique\/","title":{"rendered":"Optimisation d’antenne parabolique"},"content":{"rendered":"\n

La p\u00e9riode de confinement est propice aux exp\u00e9rimentations … J’ai d\u00e9cid\u00e9 de v\u00e9rifier si ma parabole d\u00e9di\u00e9e aux liaisons par le satellite QO-100 \u00e9tait optimis\u00e9e.
Il faut s’assurer que la source d’\u00e9mission et\/ou la t\u00eate de r\u00e9ception (LNB ou low noise block-converter, bo\u00eetier contenant un pr\u00e9-amplificateur et un convertisseur de signaux)<\/em> est correctement positionn\u00e9e en fonction de la forme de la parabole.
La feuille EXCEL de F6AGR fourni tous les \u00e9l\u00e9ments pour la v\u00e9rification.<\/p>\n\n\n\n

Feuille de calcul<\/a>T\u00e9l\u00e9charger<\/a><\/div>\n\n\n\n
\"\"<\/figure>\n\n\n\n

Je saisi les c\u00f4tes de ma parabole et la feuille me donne la position optimale de la t\u00eate.
J’ai fait un gabarit pour v\u00e9rifier le positionnement et …… pas terrible ! <\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n
\"\"<\/figure>\n\n\n\n

La longueur du bras est correcte, mais il est a plus de 3 cm du point focal (ce qui a 10GHz est beaucoup … )
Il suffit dans mon cas de placer une cale sous le support pour compenser.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

Et voil\u00e0 la correction apport\u00e9e au montage, et qui m’arrange sinon l’antenne POTY \u00e9tait trop pr\u00e8s du bras !
Les premiers essais sont tout \u00e0 fait concluants.<\/p>\n","protected":false},"excerpt":{"rendered":"

La p\u00e9riode de confinement est propice aux exp\u00e9rimentations … J’ai d\u00e9cid\u00e9 de v\u00e9rifier si ma parabole d\u00e9di\u00e9e aux liaisons par<\/p>\n","protected":false},"author":4,"featured_media":607,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"colormag_page_container_layout":"default_layout","colormag_page_sidebar_layout":"default_layout","footnotes":""},"categories":[21,1,13,14],"tags":[],"class_list":["post-597","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-antenne","category-non-classe","category-qo-100","category-realisations"],"_links":{"self":[{"href":"https:\/\/f6kmf.fr\/index.php\/wp-json\/wp\/v2\/posts\/597","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/f6kmf.fr\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/f6kmf.fr\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/f6kmf.fr\/index.php\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/f6kmf.fr\/index.php\/wp-json\/wp\/v2\/comments?post=597"}],"version-history":[{"count":4,"href":"https:\/\/f6kmf.fr\/index.php\/wp-json\/wp\/v2\/posts\/597\/revisions"}],"predecessor-version":[{"id":608,"href":"https:\/\/f6kmf.fr\/index.php\/wp-json\/wp\/v2\/posts\/597\/revisions\/608"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/f6kmf.fr\/index.php\/wp-json\/wp\/v2\/media\/607"}],"wp:attachment":[{"href":"https:\/\/f6kmf.fr\/index.php\/wp-json\/wp\/v2\/media?parent=597"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/f6kmf.fr\/index.php\/wp-json\/wp\/v2\/categories?post=597"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/f6kmf.fr\/index.php\/wp-json\/wp\/v2\/tags?post=597"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}