{"id":9378,"date":"2021-10-21T16:30:09","date_gmt":"2021-10-21T16:30:09","guid":{"rendered":"https:\/\/knowhow.distrelec.com\/?p=9378"},"modified":"2021-10-21T16:30:10","modified_gmt":"2021-10-21T16:30:10","slug":"opprette-forbindelse-del-1-en-guide-til-antenner-og-koaksiale-antennekontakter-og-kabler","status":"publish","type":"post","link":"https:\/\/knowhow.distrelec.com\/no\/elektronikk\/opprette-forbindelse-del-1-en-guide-til-antenner-og-koaksiale-antennekontakter-og-kabler\/","title":{"rendered":"Opprette forbindelse: Del 1 &#8211; En guide til antenner og koaksiale antennekontakter og kabler"},"content":{"rendered":"\n<p><em>\u00c5 utstyre tr\u00e5dl\u00f8se enheter med en antenne inneb\u00e6rer flere beslutninger. I denne artikkelen, del 1 i en todelt serie, tar vi for oss noen av egenskapene som er viktige n\u00e5r du skal velge en passende antenne. Vi g\u00e5r n\u00e6rmere inn p\u00e5 antenneterminologi og spesifikasjonene du vil st\u00f8te p\u00e5 n\u00e5r du g\u00e5r gjennom et datablad. Emner inkluderer frekvensomr\u00e5det enheten opererer innenfor, antenneforsterkning og str\u00e5lingsm\u00f8nster. Mekaniske faktorer som inntrengningsbeskyttelse, innvendig eller utvendig plassering og monteringsmetode er ogs\u00e5 viktige.<\/em><\/p>\n\n\n\n<div class=\"wp-block-buttons is-content-justification-center is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link has-red-background-color has-background\" href=\"https:\/\/www.distrelec.com\/global\/?search=antennas\" target=\"_blank\" rel=\"noreferrer noopener\">Se produktserien til Distrelec antenne<\/a><\/div>\n<\/div>\n\n\n\n<h2 id=\"en-god-antenne-er-avgjorende-for-a-etablere-en-palitelig-og-fleksibel-tradlos-forbindelse\" class=\"wp-block-heading\">En god antenne er avgj\u00f8rende for \u00e5 etablere en p\u00e5litelig og fleksibel tr\u00e5dl\u00f8s forbindelse<\/h2>\n\n\n\n<p>Vi har alle opplevd \u00e5 m\u00e5tte flytte oss rundt eller holde mobiltelefonene v\u00e5re h\u00f8yt opp for \u00e5 forbedre mottakelsen i et omr\u00e5de med d\u00e5rlig signalstyrke. Ytelsen for enhver tr\u00e5dl\u00f8s tilkobling forbedres n\u00e5r det ikke er noen hindringer i veien mellom sender og mottaker. Tr\u00e6r, vegger, v\u00e6r og terreng absorberer radiosignaler og reduserer avstanden som enheter som kan etablere en god kobling over, enten det er data eller stemme. \u00c5 utstyre en tr\u00e5dl\u00f8s enhet med en godt tilpasset antenne reduserer p\u00e5virkningsfaktorene som reduserer signalstyrken. En optimal antenne sikrer at maksimal generert radiofrekvenseffekt fra senderens siste trinn blir utstr\u00e5lt til luften; og p\u00e5 samme m\u00e5te, p\u00e5 mottakersiden kan kun det signalet som kommer frem til antennen behandles. Som vi vil se i del 2, p\u00e5virker tilkoblingskabelen og de tilh\u00f8rende kontaktene ogs\u00e5 antennens ytelse.<\/p>\n\n\n\n<h2 id=\"antenneparametere\" class=\"wp-block-heading\">Antenneparametere<\/h2>\n\n\n\n<p>Fra et forenklet perspektiv er en lengde med ledning en antenne, og det er et forhold mellom ledningens optimale lengde for bruk ved en bestemt frekvens. Begrepet b\u00f8lgelengde refererer til avstanden mellom tilst\u00f8tende topper i et tr\u00e5dl\u00f8st signal. Det brukes til \u00e5 bestemme antennens fysiske lengde og egenskaper og indikerer resonanspunktet. For eksempel har et Wi-Fi-signal som opererer p\u00e5 2,4 GHz en b\u00f8lgelengde p\u00e5 12,5 cm, ved hjelp av formelen b\u00f8lgelengde i meter(m) = lysets\/frekvensens hastighet (Hz). Lysets hastighet er en konstant p\u00e5 299.792.458 m\/s, ofte tiln\u00e6rmet til 3&#215;108. Lengden p\u00e5 en antenne er beskrevet i forhold til dens driftsb\u00f8lgelengde, for eksempel en kvartb\u00f8lge, halvb\u00f8lge eller fullb\u00f8lge.<br><br>De mest popul\u00e6re tr\u00e5dl\u00f8se kommunikasjonsmetodene for data og tale som brukes i dag, for eksempel Wi -Fi, Bluetooth, mobilkommunikasjon (4G &#8211; 5G) og ISM-applikasjoner (industriell, vitenskapelig og medisinsk), involverer frekvenser fra 400 MHz til 3,4 GHz. Ved disse frekvensene blir antennens fysiske lengde stadig kortere, noe som tillater forskjellige konstruksjonsmetoder, inkludert integrasjon i et kretskort.<br><br>Mange antenner, spesielt de som brukes til bil-, transport- og telemetriapplikasjoner, er pakket med flere antenner sammen for \u00e5 im\u00f8tekomme Wi-Fi, GPS\/GNSS, kj\u00f8ret\u00f8y-til-kj\u00f8ret\u00f8y\/kj\u00f8ret\u00f8y-til-infrastruktur\/kj\u00f8ret\u00f8y-til-alt (V2V\/V2I\/V2X) og LTE mobilkommunikasjon. Et eksempel er <a href=\"https:\/\/www.distrelec.com\/global\/?search=30220262\" target=\"_blank\" rel=\"noreferrer noopener\">Taoglas Optimus MA220<\/a>. Se figur 1. Denne eksternt monterte antennen er IP67-tett.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img  loading=\"lazy\"  decoding=\"async\"  width=\"311\"  height=\"273\"  src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAATcAAAERAQMAAAAkGXJaAAAAA1BMVEUAAP+KeNJXAAAAAXRSTlMAQObYZgAAAAlwSFlzAAAOxAAADsQBlSsOGwAAACFJREFUaN7twTEBAAAAwqD1T20JT6AAAAAAAAAAAAAA4G8qqAABtX38AQAAAABJRU5ErkJggg==\"  alt=\"\"  class=\"wp-image-8773 pk-lazyload\"  data-pk-sizes=\"auto\"  data-ls-sizes=\"auto, (max-width: 311px) 100vw, 311px\"  data-pk-src=\"https:\/\/knowhow.distrelec.com\/wp-content\/uploads\/2021\/10\/taoglas-ma200.png\"  data-pk-srcset=\"https:\/\/knowhow.distrelec.com\/wp-content\/uploads\/2021\/10\/taoglas-ma200.png 311w, https:\/\/knowhow.distrelec.com\/wp-content\/uploads\/2021\/10\/taoglas-ma200.png?resize=300,263 300w\" ><figcaption>Figur 1 &#8211; Taoglas Optimus MA200 ekstern antenne i &laquo;puck&raquo;-utf\u00f8relse som brukes til transport og telemetri (kilde Taoglas)<\/figcaption><\/figure><\/div>\n\n\n\n<p><strong>Antenneforsterkning:<\/strong> Utformingen og konstruksjonen av noen antenner gj\u00f8r dem mer effektive til \u00e5 sende og motta enn en standard antennemodell. P\u00e5 databladet er denne faktoren uttrykt som forsterkning og m\u00e5les i dBi (dB isotrop). For eksempel illustrerer figur 2 ytelsen til <a href=\"https:\/\/wuct\/optimus-gpsglonass3m-rgww.taoglas.com\/prod-174-smam-cellular3m-rg-174-smam-2\/\" target=\"_blank\" rel=\"noreferrer noopener\">Taoglas MA220<\/a> for LTE mobilkommunikasjon.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img  loading=\"lazy\"  decoding=\"async\"  width=\"817\"  height=\"465\"  src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAzEAAAHRAQMAAABgg6VoAAAAA1BMVEUAAP+KeNJXAAAAAXRSTlMAQObYZgAAAAlwSFlzAAAOxAAADsQBlSsOGwAAAEZJREFUeNrtwTEBAAAAwqD1T20LL6AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAgLcBvOgAAe+6p04AAAAASUVORK5CYII=\"  alt=\"\"  class=\"wp-image-8780 pk-lazyload\"  data-pk-sizes=\"auto\"  data-ls-sizes=\"auto, (max-width: 817px) 100vw, 817px\"  data-pk-src=\"https:\/\/knowhow.distrelec.com\/wp-content\/uploads\/2021\/10\/taoglas-figure-2.png\"  data-pk-srcset=\"https:\/\/knowhow.distrelec.com\/wp-content\/uploads\/2021\/10\/taoglas-figure-2.png 817w, https:\/\/knowhow.distrelec.com\/wp-content\/uploads\/2021\/10\/taoglas-figure-2.png?resize=300,171 300w, https:\/\/knowhow.distrelec.com\/wp-content\/uploads\/2021\/10\/taoglas-figure-2.png?resize=768,437 768w, https:\/\/knowhow.distrelec.com\/wp-content\/uploads\/2021\/10\/taoglas-figure-2.png?resize=380,216 380w, https:\/\/knowhow.distrelec.com\/wp-content\/uploads\/2021\/10\/taoglas-figure-2.png?resize=550,313 550w, https:\/\/knowhow.distrelec.com\/wp-content\/uploads\/2021\/10\/taoglas-figure-2.png?resize=800,455 800w\" ><figcaption>Figur 2 &#8211; LTE-antenneforsterkningen til Taoglas MA220 (kilde Taoglas)<\/figcaption><\/figure><\/div>\n\n\n\n<p><strong>Str\u00e5lingsm\u00f8nster:<\/strong> Noen antenner har spesielle egenskaper n\u00e5r det gjelder retning, noe som betyr at de er mer effektive til \u00e5 utstr\u00e5le og motta i bestemte retninger eller bestemte plan. En antenne med et isotropisk str\u00e5lingsm\u00f8nster betyr at den avgir samme mengde energi i alle retninger. En rundstr\u00e5lende antenne utstr\u00e5ler samme mengde energi i et bestemt plan, horisontalt eller vertikalt.<\/p>\n\n\n\n<p><strong>Antenneimpedans:<\/strong> Impedansen til en antenne endres med frekvensen. Det er sv\u00e6rt viktig \u00e5 tilpasse antennen til utgangsimpedansen til senderens utgangstrinn og p\u00e5 samme m\u00e5te mottakerens front-end. I del 2 av denne artikkelen l\u00e6rer vi ogs\u00e5 hvordan impedansen til tilkoblingskabelen og kontaktene er avgj\u00f8rende for \u00e5 oppn\u00e5 en god match. En impedans p\u00e5 50 Ohm er en sv\u00e6rt vanlig standard.<\/p>\n\n\n\n<p><strong>Antenneb\u00e5ndbredde:<\/strong> Frekvensomr\u00e5det som antennen er effektiv i, kalles b\u00e5ndbredden. B\u00e5ndbredde er vanligvis sitert basert p\u00e5 en senterfrekvens. Et eksempel p\u00e5 en kretskort-antenne er <a href=\"https:\/\/wuct\/optimus-gpsglonass3m-rgww.taoglas.com\/prod-174-smam-cellular3m-rg-174-smam-2\/\" target=\"_blank\" rel=\"noreferrer noopener\">Molex Wi-Fi PCB<\/a>-antenne.<\/p>\n\n\n\n<p>Den har en b\u00e5ndbredde p\u00e5 100 MHz p\u00e5 en senterfrekvens p\u00e5 2,45 GHz, en impedans p\u00e5 50 Ohm og 3,2 dBi forsterkning.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img  loading=\"lazy\"  decoding=\"async\"  width=\"817\"  height=\"465\"  src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAzEAAAHRAQMAAABgg6VoAAAAA1BMVEUAAP+KeNJXAAAAAXRSTlMAQObYZgAAAAlwSFlzAAAOxAAADsQBlSsOGwAAAEZJREFUeNrtwTEBAAAAwqD1T20LL6AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAgLcBvOgAAe+6p04AAAAASUVORK5CYII=\"  alt=\"\"  class=\"wp-image-8787 pk-lazyload\"  data-pk-sizes=\"auto\"  data-ls-sizes=\"auto, (max-width: 817px) 100vw, 817px\"  data-pk-src=\"https:\/\/knowhow.distrelec.com\/wp-content\/uploads\/2021\/10\/molex-figure-3.png\"  data-pk-srcset=\"https:\/\/knowhow.distrelec.com\/wp-content\/uploads\/2021\/10\/molex-figure-3.png 817w, https:\/\/knowhow.distrelec.com\/wp-content\/uploads\/2021\/10\/molex-figure-3.png?resize=300,171 300w, https:\/\/knowhow.distrelec.com\/wp-content\/uploads\/2021\/10\/molex-figure-3.png?resize=768,437 768w, https:\/\/knowhow.distrelec.com\/wp-content\/uploads\/2021\/10\/molex-figure-3.png?resize=380,216 380w, https:\/\/knowhow.distrelec.com\/wp-content\/uploads\/2021\/10\/molex-figure-3.png?resize=550,313 550w, https:\/\/knowhow.distrelec.com\/wp-content\/uploads\/2021\/10\/molex-figure-3.png?resize=800,455 800w\" ><figcaption>Figur 3 &#8211; Molex Wi-Fi kretskort-antenne (kilde Molex)<\/figcaption><\/figure><\/div>\n\n\n\n<p><strong>VSWR og returtap:<\/strong> Returtap m\u00e5ler hvor godt en antenne er tilpasset en sender og dens overf\u00f8ringsledning (koaksialkabelen). Returtap m\u00e5ler hvor mye effekt som reflekteres tilbake til senderen i stedet for \u00e5 bli utstr\u00e5lt og m\u00e5les i dB. Jo h\u00f8yere det (negative tallet) er, desto bedre er antennens ytelse. Spenning st\u00e5ende b\u00f8lgeforhold (VSWR) er en annen m\u00e5te \u00e5 m\u00e5le tap av retur. En antenne skal ha et returtap bedre enn -10 dB (VSWR 2). Figur 4 illustrerer returtapskarakteristikkene til <a href=\"https:\/\/www.distrelec.de\/en\/cellular-antenna-4g-3g-2g-wi-fi-gps-male-sma-magnetic-taoglas-ga-110-101111\/p\/30220242?q=&amp;pos=6&amp;origPos=6&amp;origPageSize=50&amp;track=true\" target=\"_blank\" rel=\"noreferrer noopener\">Taoglas GA110<\/a> mobilantenne.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img  loading=\"lazy\"  decoding=\"async\"  width=\"681\"  height=\"358\"  src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAqkAAAFmAQMAAAB0vpF4AAAAA1BMVEUAAP+KeNJXAAAAAXRSTlMAQObYZgAAAAlwSFlzAAAOxAAADsQBlSsOGwAAADVJREFUeNrtwQENAAAAwqD3T20ON6AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAABeDXmqAAEhyq5MAAAAAElFTkSuQmCC\"  alt=\"\"  class=\"wp-image-8794 pk-lazyload\"  data-pk-sizes=\"auto\"  data-ls-sizes=\"auto, (max-width: 681px) 100vw, 681px\"  data-pk-src=\"https:\/\/knowhow.distrelec.com\/wp-content\/uploads\/2021\/10\/Taoglas-figure-4.png\"  data-pk-srcset=\"https:\/\/knowhow.distrelec.com\/wp-content\/uploads\/2021\/10\/Taoglas-figure-4.png 681w, https:\/\/knowhow.distrelec.com\/wp-content\/uploads\/2021\/10\/Taoglas-figure-4.png?resize=300,158 300w, https:\/\/knowhow.distrelec.com\/wp-content\/uploads\/2021\/10\/Taoglas-figure-4.png?resize=380,200 380w, https:\/\/knowhow.distrelec.com\/wp-content\/uploads\/2021\/10\/Taoglas-figure-4.png?resize=550,289 550w\" ><figcaption>Figur 4 &#8211; Et plott av returtapskarakteristikkene til Taoglas mobilantenne viser returtap mot frekvens (kilde Taoglas)<\/figcaption><\/figure><\/div>\n\n\n\n<h2 id=\"maling-av-antenneparametere\" class=\"wp-block-heading\">M\u00e5ling av antenneparametere<\/h2>\n\n\n\n<p>En vektornettverksanalysator (VNA) brukes til \u00e5 m\u00e5le impedans- og returtapskarakteristikken til en antenne og dens overf\u00f8ringsleding. B\u00e6rbare og rimelige (&lt;150 Euro) VNAer gir tilstrekkelig m\u00e5leoppl\u00f8sning, men en mer profesjonell stasjon\u00e6r enhet som koster mer enn 5000 Euro er mer egnet for laboratoriebasert arbeid. Avanserte RF-spektrumanalysatorer har ofte en VNA-funksjon. VNA hjelper ogs\u00e5 til med \u00e5 oppn\u00e5 riktig design av kondensator- og induktansbaserte matchende nettverk mellom sender og overf\u00f8ringsledning.<\/p>\n\n\n\n<h2 id=\"parametere-i-antennedatablad-ikke-lenger-et-mysterium\" class=\"wp-block-heading\">Parametere i antennedatablad; ikke lenger et mysterium<\/h2>\n\n\n\n<p>Denne korte artikkelen forklarer noen av de viktigste parametrene du sannsynligvis vil st\u00f8te p\u00e5 n\u00e5r du leser et antenneblad. Med denne informasjonen f\u00e5r du et bedre innblikk i den beste antennen for ditt bruk, og som vil gi optimal ytelse. I del 2 vil vi se n\u00e6rmere p\u00e5 hvilken rolle antennekabler og de vanligste antennekontaktene spiller.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-content-justification-center is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link has-red-background-color has-background\" href=\"https:\/\/www.distrelec.com\/global\/?search=antennas\" target=\"_blank\" rel=\"noreferrer noopener\"> Se produktserien til Distrelec antenne <\/a><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"\u00c5 utstyre tr\u00e5dl\u00f8se enheter med en antenne inneb\u00e6rer flere beslutninger. I denne artikkelen, del 1 i en todelt&hellip;\n","protected":false},"author":4,"featured_media":8768,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"csco_singular_sidebar":"","csco_page_header_type":"","csco_appearance_grid":"","csco_page_load_nextpost":"","csco_post_video_location":[],"csco_post_video_location_hash":"","csco_post_video_url":"","csco_post_video_bg_start_time":0,"csco_post_video_bg_end_time":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[212,221],"tags":[653,903,652,651,654],"coauthors":[],"class_list":{"0":"post-9378","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-elektronikk","8":"category-telekommunikasjon","9":"tag-antenner","10":"tag-iot-no","11":"tag-iot-4","12":"tag-molex-4","13":"tag-taoglas-4","14":"cs-entry","15":"cs-video-wrap"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Opprette forbindelse: Del 1 - En guide til antenner og koaksiale antennekontakter og kabler - KnowHow<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/knowhow.distrelec.com\/no\/elektronikk\/opprette-forbindelse-del-1-en-guide-til-antenner-og-koaksiale-antennekontakter-og-kabler\/\" \/>\n<meta property=\"og:locale\" content=\"nb_NO\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Opprette forbindelse: Del 1 - En guide til antenner og koaksiale antennekontakter og kabler - KnowHow\" \/>\n<meta property=\"og:description\" content=\"\u00c5 utstyre tr\u00e5dl\u00f8se enheter med en antenne inneb\u00e6rer flere beslutninger. 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