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data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Alternar o índice" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Alternar o índice</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Modulação em frequência</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Ir para um artigo noutra língua. Disponível em 57 línguas" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-57" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">57 línguas</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-am mw-list-item"><a href="https://am.wikipedia.org/wiki/%E1%8B%B5%E1%8C%8D%E1%8C%8D%E1%88%9E%E1%88%BD_%E1%88%98%E1%8A%A8%E1%88%AD%E1%8A%A8%E1%88%9D" title="ድግግሞሽ መከርከም — amárico" lang="am" hreflang="am" data-title="ድግግሞሽ መከርከም" data-language-autonym="አማርኛ" data-language-local-name="amárico" class="interlanguage-link-target"><span>አማርኛ</span></a></li><li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%AA%D8%B6%D9%85%D9%8A%D9%86_%D8%A7%D9%84%D8%AA%D8%B1%D8%AF%D8%AF" title="تضمين التردد — árabe" lang="ar" hreflang="ar" data-title="تضمين التردد" data-language-autonym="العربية" data-language-local-name="árabe" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-be mw-list-item"><a href="https://be.wikipedia.org/wiki/%D0%A7%D0%B0%D1%81%D1%82%D0%BE%D1%82%D0%BD%D0%B0%D1%8F_%D0%BC%D0%B0%D0%B4%D1%83%D0%BB%D1%8F%D1%86%D1%8B%D1%8F" title="Частотная мадуляцыя — bielorrusso" lang="be" hreflang="be" data-title="Частотная мадуляцыя" data-language-autonym="Беларуская" data-language-local-name="bielorrusso" class="interlanguage-link-target"><span>Беларуская</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%A7%D0%B5%D1%81%D1%82%D0%BE%D1%82%D0%BD%D0%B0_%D0%BC%D0%BE%D0%B4%D1%83%D0%BB%D0%B0%D1%86%D0%B8%D1%8F" title="Честотна модулация — búlgaro" lang="bg" hreflang="bg" data-title="Честотна модулация" data-language-autonym="Български" data-language-local-name="búlgaro" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-bn mw-list-item"><a href="https://bn.wikipedia.org/wiki/%E0%A6%AB%E0%A7%8D%E0%A6%B0%E0%A6%BF%E0%A6%95%E0%A7%8B%E0%A6%AF%E0%A6%BC%E0%A7%87%E0%A6%A8%E0%A7%8D%E0%A6%B8%E0%A6%BF_%E0%A6%AE%E0%A6%A1%E0%A7%81%E0%A6%B2%E0%A7%87%E0%A6%B6%E0%A6%A8" title="ফ্রিকোয়েন্সি মডুলেশন — bengalês" lang="bn" hreflang="bn" data-title="ফ্রিকোয়েন্সি মডুলেশন" data-language-autonym="বাংলা" data-language-local-name="bengalês" class="interlanguage-link-target"><span>বাংলা</span></a></li><li class="interlanguage-link interwiki-bs mw-list-item"><a href="https://bs.wikipedia.org/wiki/Frekvencijska_modulacija" title="Frekvencijska modulacija — bósnio" lang="bs" hreflang="bs" data-title="Frekvencijska modulacija" data-language-autonym="Bosanski" data-language-local-name="bósnio" class="interlanguage-link-target"><span>Bosanski</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Freq%C3%BC%C3%A8ncia_modulada" title="Freqüència modulada — catalão" lang="ca" hreflang="ca" data-title="Freqüència modulada" data-language-autonym="Català" data-language-local-name="catalão" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Frekven%C4%8Dn%C3%AD_modulace" title="Frekvenční modulace — checo" lang="cs" hreflang="cs" data-title="Frekvenční modulace" data-language-autonym="Čeština" data-language-local-name="checo" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/Frekvensmodulation" title="Frekvensmodulation — dinamarquês" lang="da" hreflang="da" data-title="Frekvensmodulation" data-language-autonym="Dansk" data-language-local-name="dinamarquês" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Frequenzmodulation" title="Frequenzmodulation — alemão" lang="de" hreflang="de" data-title="Frequenzmodulation" data-language-autonym="Deutsch" data-language-local-name="alemão" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-el mw-list-item"><a href="https://el.wikipedia.org/wiki/%CE%94%CE%B9%CE%B1%CE%BC%CF%8C%CF%81%CF%86%CF%89%CF%83%CE%B7_%CF%83%CF%85%CF%87%CE%BD%CF%8C%CF%84%CE%B7%CF%84%CE%B1%CF%82" title="Διαμόρφωση συχνότητας — grego" lang="el" hreflang="el" data-title="Διαμόρφωση συχνότητας" data-language-autonym="Ελληνικά" data-language-local-name="grego" class="interlanguage-link-target"><span>Ελληνικά</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/Frequency_modulation" title="Frequency modulation — inglês" lang="en" hreflang="en" data-title="Frequency modulation" data-language-autonym="English" data-language-local-name="inglês" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/Frekvencmodulado" title="Frekvencmodulado — esperanto" lang="eo" hreflang="eo" data-title="Frekvencmodulado" data-language-autonym="Esperanto" data-language-local-name="esperanto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Frecuencia_modulada" title="Frecuencia modulada — espanhol" lang="es" hreflang="es" data-title="Frecuencia modulada" data-language-autonym="Español" data-language-local-name="espanhol" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/Sagedusmodulatsioon" title="Sagedusmodulatsioon — estónio" lang="et" hreflang="et" data-title="Sagedusmodulatsioon" data-language-autonym="Eesti" data-language-local-name="estónio" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Frekuentzia_Modulatua" title="Frekuentzia Modulatua — basco" lang="eu" hreflang="eu" data-title="Frekuentzia Modulatua" data-language-autonym="Euskara" data-language-local-name="basco" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D9%85%D8%AF%D9%88%D9%84%D9%87%E2%80%8C%D8%B3%D8%A7%D8%B2%DB%8C_%D8%A8%D8%B3%D8%A7%D9%85%D8%AF" title="مدوله‌سازی بسامد — persa" lang="fa" hreflang="fa" data-title="مدوله‌سازی بسامد" data-language-autonym="فارسی" data-language-local-name="persa" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Taajuusmodulaatio" title="Taajuusmodulaatio — finlandês" lang="fi" hreflang="fi" data-title="Taajuusmodulaatio" data-language-autonym="Suomi" data-language-local-name="finlandês" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Modulation_de_fr%C3%A9quence" title="Modulation de fréquence — francês" lang="fr" hreflang="fr" data-title="Modulation de fréquence" data-language-autonym="Français" data-language-local-name="francês" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-ga mw-list-item"><a href="https://ga.wikipedia.org/wiki/Modhn%C3%BA_minic%C3%ADochta" title="Modhnú minicíochta — irlandês" lang="ga" hreflang="ga" data-title="Modhnú minicíochta" data-language-autonym="Gaeilge" data-language-local-name="irlandês" class="interlanguage-link-target"><span>Gaeilge</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%90%D7%A4%D7%A0%D7%95%D7%9F_%D7%AA%D7%93%D7%A8" title="אפנון תדר — hebraico" lang="he" hreflang="he" data-title="אפנון תדר" data-language-autonym="עברית" data-language-local-name="hebraico" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%86%E0%A4%B5%E0%A5%83%E0%A4%A4%E0%A5%8D%E0%A4%A4%E0%A4%BF_%E0%A4%AE%E0%A5%89%E0%A4%A1%E0%A5%8D%E0%A4%AF%E0%A5%82%E0%A4%B2%E0%A5%87%E0%A4%B6%E0%A4%A8" title="आवृत्ति मॉड्यूलेशन — hindi" lang="hi" hreflang="hi" data-title="आवृत्ति मॉड्यूलेशन" data-language-autonym="हिन्दी" data-language-local-name="hindi" class="interlanguage-link-target"><span>हिन्दी</span></a></li><li class="interlanguage-link interwiki-hr mw-list-item"><a href="https://hr.wikipedia.org/wiki/Frekvencijska_modulacija" title="Frekvencijska modulacija — croata" lang="hr" hreflang="hr" data-title="Frekvencijska modulacija" data-language-autonym="Hrvatski" data-language-local-name="croata" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/Sz%C3%B6gmodul%C3%A1ci%C3%B3" title="Szögmoduláció — húngaro" lang="hu" hreflang="hu" data-title="Szögmoduláció" data-language-autonym="Magyar" data-language-local-name="húngaro" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Modulasi_frekuensi" title="Modulasi frekuensi — indonésio" lang="id" hreflang="id" data-title="Modulasi frekuensi" data-language-autonym="Bahasa Indonesia" data-language-local-name="indonésio" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Modulazione_di_frequenza" title="Modulazione di frequenza — italiano" lang="it" hreflang="it" data-title="Modulazione di frequenza" data-language-autonym="Italiano" data-language-local-name="italiano" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E5%91%A8%E6%B3%A2%E6%95%B0%E5%A4%89%E8%AA%BF" title="周波数変調 — japonês" lang="ja" hreflang="ja" data-title="周波数変調" data-language-autonym="日本語" data-language-local-name="japonês" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-ka mw-list-item"><a href="https://ka.wikipedia.org/wiki/%E1%83%A1%E1%83%98%E1%83%AE%E1%83%A8%E1%83%98%E1%83%A0%E1%83%A3%E1%83%9A%E1%83%98_%E1%83%9B%E1%83%9D%E1%83%93%E1%83%A3%E1%83%9A%E1%83%90%E1%83%AA%E1%83%98%E1%83%90" title="სიხშირული მოდულაცია — georgiano" lang="ka" hreflang="ka" data-title="სიხშირული მოდულაცია" data-language-autonym="ქართული" data-language-local-name="georgiano" class="interlanguage-link-target"><span>ქართული</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EC%A3%BC%ED%8C%8C%EC%88%98_%EB%B3%80%EC%A1%B0" title="주파수 변조 — coreano" lang="ko" hreflang="ko" data-title="주파수 변조" data-language-autonym="한국어" data-language-local-name="coreano" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-lt mw-list-item"><a href="https://lt.wikipedia.org/wiki/Da%C5%BEnio_moduliacija" title="Dažnio moduliacija — lituano" lang="lt" hreflang="lt" data-title="Dažnio moduliacija" data-language-autonym="Lietuvių" data-language-local-name="lituano" class="interlanguage-link-target"><span>Lietuvių</span></a></li><li class="interlanguage-link interwiki-lv mw-list-item"><a href="https://lv.wikipedia.org/wiki/Frekvences_modul%C4%81cija" title="Frekvences modulācija — letão" lang="lv" hreflang="lv" data-title="Frekvences modulācija" data-language-autonym="Latviešu" data-language-local-name="letão" class="interlanguage-link-target"><span>Latviešu</span></a></li><li class="interlanguage-link interwiki-mk mw-list-item"><a href="https://mk.wikipedia.org/wiki/%D0%A7%D0%B5%D1%81%D1%82%D0%BE%D1%82%D0%BD%D0%B0_%D0%BC%D0%BE%D0%B4%D1%83%D0%BB%D0%B0%D1%86%D0%B8%D1%98%D0%B0" title="Честотна модулација — macedónio" lang="mk" hreflang="mk" data-title="Честотна модулација" data-language-autonym="Македонски" data-language-local-name="macedónio" class="interlanguage-link-target"><span>Македонски</span></a></li><li class="interlanguage-link interwiki-ml mw-list-item"><a href="https://ml.wikipedia.org/wiki/%E0%B4%AB%E0%B5%8D%E0%B4%B0%E0%B5%80%E0%B4%95%E0%B5%8D%E0%B4%B5%E0%B5%BB%E0%B4%B8%E0%B4%BF_%E0%B4%AE%E0%B5%8B%E0%B4%A1%E0%B5%81%E0%B4%B2%E0%B5%87%E0%B4%B7%E0%B5%BB" title="ഫ്രീക്വൻസി മോഡുലേഷൻ — malaiala" lang="ml" hreflang="ml" data-title="ഫ്രീക്വൻസി മോഡുലേഷൻ" data-language-autonym="മലയാളം" data-language-local-name="malaiala" class="interlanguage-link-target"><span>മലയാളം</span></a></li><li class="interlanguage-link interwiki-mn mw-list-item"><a href="https://mn.wikipedia.org/wiki/%D0%94%D0%B0%D0%B2%D1%82%D0%B0%D0%BC%D0%B6%D0%B8%D0%B9%D0%BD_%D0%BC%D0%BE%D0%B4%D1%83%D0%BB%D1%8F%D1%86" title="Давтамжийн модуляц — mongol" lang="mn" hreflang="mn" data-title="Давтамжийн модуляц" data-language-autonym="Монгол" data-language-local-name="mongol" class="interlanguage-link-target"><span>Монгол</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Modulasi_frekuensi" title="Modulasi frekuensi — malaio" lang="ms" hreflang="ms" data-title="Modulasi frekuensi" data-language-autonym="Bahasa Melayu" data-language-local-name="malaio" class="interlanguage-link-target"><span>Bahasa Melayu</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Frequentiemodulatie" title="Frequentiemodulatie — neerlandês" lang="nl" hreflang="nl" data-title="Frequentiemodulatie" data-language-autonym="Nederlands" data-language-local-name="neerlandês" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-nn mw-list-item"><a href="https://nn.wikipedia.org/wiki/Frekvensmodulasjon" title="Frekvensmodulasjon — norueguês nynorsk" lang="nn" hreflang="nn" data-title="Frekvensmodulasjon" data-language-autonym="Norsk nynorsk" data-language-local-name="norueguês nynorsk" class="interlanguage-link-target"><span>Norsk nynorsk</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Frekvensmodulasjon" title="Frekvensmodulasjon — norueguês bokmål" lang="nb" hreflang="nb" data-title="Frekvensmodulasjon" data-language-autonym="Norsk bokmål" data-language-local-name="norueguês bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Modulacja_cz%C4%99stotliwo%C5%9Bci" title="Modulacja częstotliwości — polaco" lang="pl" hreflang="pl" data-title="Modulacja częstotliwości" data-language-autonym="Polski" data-language-local-name="polaco" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/Modula%C8%9Bie_%C3%AEn_frecven%C8%9B%C4%83" title="Modulație în frecvență — romeno" lang="ro" hreflang="ro" data-title="Modulație în frecvență" data-language-autonym="Română" data-language-local-name="romeno" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%A7%D0%B0%D1%81%D1%82%D0%BE%D1%82%D0%BD%D0%B0%D1%8F_%D0%BC%D0%BE%D0%B4%D1%83%D0%BB%D1%8F%D1%86%D0%B8%D1%8F" title="Частотная модуляция — russo" lang="ru" hreflang="ru" data-title="Частотная модуляция" data-language-autonym="Русский" data-language-local-name="russo" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sh mw-list-item"><a href="https://sh.wikipedia.org/wiki/Frekvencijska_modulacija" title="Frekvencijska modulacija — servo-croata" lang="sh" hreflang="sh" data-title="Frekvencijska modulacija" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="servo-croata" class="interlanguage-link-target"><span>Srpskohrvatski / српскохрватски</span></a></li><li class="interlanguage-link interwiki-si mw-list-item"><a href="https://si.wikipedia.org/wiki/%E0%B7%83%E0%B6%82%E0%B6%9B%E0%B7%8A%E2%80%8D%E0%B6%BA%E0%B7%8F%E0%B6%AD_%E0%B6%B8%E0%B7%96%E0%B6%BB%E0%B7%8A%E0%B6%A2%E0%B6%B1%E0%B6%BA" title="සංඛ්‍යාත මූර්ජනය — cingalês" lang="si" hreflang="si" data-title="සංඛ්‍යාත මූර්ජනය" data-language-autonym="සිංහල" data-language-local-name="cingalês" class="interlanguage-link-target"><span>සිංහල</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Frequency_modulation" title="Frequency modulation — Simple English" lang="en-simple" hreflang="en-simple" data-title="Frequency modulation" data-language-autonym="Simple English" data-language-local-name="Simple English" class="interlanguage-link-target"><span>Simple English</span></a></li><li class="interlanguage-link interwiki-sk mw-list-item"><a href="https://sk.wikipedia.org/wiki/Frekven%C4%8Dn%C3%A1_modul%C3%A1cia" title="Frekvenčná modulácia — eslovaco" lang="sk" hreflang="sk" data-title="Frekvenčná modulácia" data-language-autonym="Slovenčina" data-language-local-name="eslovaco" class="interlanguage-link-target"><span>Slovenčina</span></a></li><li class="interlanguage-link interwiki-sl mw-list-item"><a href="https://sl.wikipedia.org/wiki/Frekven%C4%8Dna_modulacija" title="Frekvenčna modulacija — esloveno" lang="sl" hreflang="sl" data-title="Frekvenčna modulacija" data-language-autonym="Slovenščina" data-language-local-name="esloveno" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/%D0%A4%D1%80%D0%B5%D0%BA%D0%B2%D0%B5%D0%BD%D1%86%D0%B8%D1%98%D1%81%D0%BA%D0%B0_%D0%BC%D0%BE%D0%B4%D1%83%D0%BB%D0%B0%D1%86%D0%B8%D1%98%D0%B0" title="Фреквенцијска модулација — sérvio" lang="sr" hreflang="sr" data-title="Фреквенцијска модулација" data-language-autonym="Српски / srpski" data-language-local-name="sérvio" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-su mw-list-item"><a href="https://su.wikipedia.org/wiki/Modulasi_fr%C3%A9ku%C3%A9nsi" title="Modulasi frékuénsi — sundanês" lang="su" hreflang="su" data-title="Modulasi frékuénsi" data-language-autonym="Sunda" data-language-local-name="sundanês" class="interlanguage-link-target"><span>Sunda</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Frekvensmodulering" title="Frekvensmodulering — sueco" lang="sv" hreflang="sv" data-title="Frekvensmodulering" data-language-autonym="Svenska" data-language-local-name="sueco" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-ta mw-list-item"><a href="https://ta.wikipedia.org/wiki/%E0%AE%85%E0%AE%A4%E0%AE%BF%E0%AE%B0%E0%AF%8D%E0%AE%B5%E0%AF%86%E0%AE%A3%E0%AF%8D_%E0%AE%AA%E0%AE%A3%E0%AF%8D%E0%AE%AA%E0%AF%87%E0%AE%B1%E0%AF%8D%E0%AE%B1%E0%AE%AE%E0%AF%8D" title="அதிர்வெண் பண்பேற்றம் — tâmil" lang="ta" hreflang="ta" data-title="அதிர்வெண் பண்பேற்றம்" data-language-autonym="தமிழ்" data-language-local-name="tâmil" class="interlanguage-link-target"><span>தமிழ்</span></a></li><li class="interlanguage-link interwiki-th mw-list-item"><a href="https://th.wikipedia.org/wiki/%E0%B8%81%E0%B8%B2%E0%B8%A3%E0%B8%81%E0%B8%A5%E0%B9%89%E0%B8%B3%E0%B8%84%E0%B8%A7%E0%B8%B2%E0%B8%A1%E0%B8%96%E0%B8%B5%E0%B9%88" title="การกล้ำความถี่ — tailandês" lang="th" hreflang="th" data-title="การกล้ำความถี่" data-language-autonym="ไทย" data-language-local-name="tailandês" class="interlanguage-link-target"><span>ไทย</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Frekans_mod%C3%BClasyonu" title="Frekans modülasyonu — turco" lang="tr" hreflang="tr" data-title="Frekans modülasyonu" data-language-autonym="Türkçe" data-language-local-name="turco" class="interlanguage-link-target"><span>Türkçe</span></a></li><li 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href="/wiki/Ficheiro:Question_book.svg" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/9/97/Question_book.svg/40px-Question_book.svg.png" decoding="async" width="40" height="32" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/9/97/Question_book.svg/60px-Question_book.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/9/97/Question_book.svg/80px-Question_book.svg.png 2x" data-file-width="252" data-file-height="199" /></a></span></div></td><td class="mbox-text"><div class="mbox-text-span">Este artigo <b>não cita <a href="/wiki/Wikip%C3%A9dia:Verificabilidade" title="Wikipédia:Verificabilidade">fontes confiáveis</a></b>.<span class="hide-when-compact"> Ajude a <a href="/wiki/Wikip%C3%A9dia:Livro_de_estilo/Cite_as_fontes" title="Wikipédia:Livro de estilo/Cite as fontes">inserir referências</a>. Conteúdo não <a href="/wiki/Wikip%C3%A9dia:Verificabilidade" title="Wikipédia:Verificabilidade">verificável</a> pode ser removido.—<small><i>Encontre fontes:</i> <span class="plainlinks"><a rel="nofollow" class="external text" href="https://wikipedialibrary.wmflabs.org/">ABW</a>  •  <a rel="nofollow" class="external text" href="https://www.periodicos.capes.gov.br">CAPES</a>  •  <a rel="nofollow" class="external text" href="https://www.google.com/search?as_eq=wikipedia&as_epq=Modula%C3%A7%C3%A3o+em+frequ%C3%AAncia">Google</a> (<a rel="nofollow" class="external text" href="https://www.google.com/search?hl=pt&tbm=nws&q=Modula%C3%A7%C3%A3o+em+frequ%C3%AAncia&oq=Modula%C3%A7%C3%A3o+em+frequ%C3%AAncia">notícias</a> • <a rel="nofollow" class="external text" href="http://books.google.com/books?&as_brr=0&as_epq=Modula%C3%A7%C3%A3o+em+frequ%C3%AAncia">livros</a> • <a rel="nofollow" class="external text" href="https://scholar.google.com/scholar?hl=pt&q=Modula%C3%A7%C3%A3o+em+frequ%C3%AAncia">acadêmico</a>)</span></small></span> <small class="date-container"><i>(<span class="date">Dezembro de 2017</span>)</i></small></div></td></tr></tbody></table> <div class="hatnote"><span typeof="mw:File"><span><img src="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Disambig_grey.svg/20px-Disambig_grey.svg.png" decoding="async" width="20" height="15" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Disambig_grey.svg/30px-Disambig_grey.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Disambig_grey.svg/40px-Disambig_grey.svg.png 2x" data-file-width="260" data-file-height="200" /></span></span> <b>Nota:</b> Não confundir com <a href="/wiki/R%C3%A1dio_FM" title="Rádio FM">Rádio FM</a>.</div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/Ficheiro:Frequency-modulation.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/d/df/Frequency-modulation.png/220px-Frequency-modulation.png" decoding="async" width="220" height="292" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/d/df/Frequency-modulation.png 1.5x" data-file-width="320" data-file-height="424" /></a><figcaption>frame.</figcaption></figure> <p>Em <a href="/wiki/Telecomunica%C3%A7%C3%B5es" title="Telecomunicações">telecomunicações</a> e <a href="/wiki/Processamento_de_sinal" title="Processamento de sinal">processamento de sinal</a>, a <b>modulação em frequência</b> (FM em inglês <i>frequency modulation</i>) transmite informações por meio de uma <a href="/w/index.php?title=Portadora&action=edit&redlink=1" class="new" title="Portadora (página não existe)">portadora</a> variando a sua frequência instantânea. Está em oposição com a <a href="/wiki/Modula%C3%A7%C3%A3o_em_amplitude" title="Modulação em amplitude">modulação em amplitude</a>, na qual a amplitude da portadora varia enquanto a frequência permanece constante. Em aplicações <a href="/wiki/Anal%C3%B3gico" class="mw-disambig" title="Analógico">analógicas</a>, a diferença entre a frequência instantânea e a frequência base da portadora é diretamente proporcional ao valor instantâneo da amplitude do sinal de entrada. Dados digitais podem ser enviados por uma mudança na frequência da portadora mediante uma variedade de configurações, uma técnica conhecida como <a href="/wiki/Modula%C3%A7%C3%A3o_por_chaveamento_de_frequ%C3%AAncia" class="mw-redirect" title="Modulação por chaveamento de frequência">Modulação por chaveamento de frequência</a> (FSK). A FSK é largamente utilizada em transmissão de dados e fax modem, e pode ser utilizada para transmitir <a href="/wiki/C%C3%B3digo_Morse" title="Código Morse">código Morse</a>. A Modulação em frequência é utilizada também em <a href="/wiki/Telemetria" title="Telemetria">telemetria</a>, <a href="/wiki/Radar" title="Radar">radar</a> e <a href="/wiki/Prospec%C3%A7%C3%A3o_s%C3%ADsmica" class="mw-redirect" title="Prospecção sísmica">prospecção sísmica</a>. A Modulação em frequência é conhecida como <a href="/wiki/Modula%C3%A7%C3%A3o_em_fase" title="Modulação em fase">modulação em fase</a> quando a modulação em fase da portadora é a integral do tempo do sinal FM. A FM é largamente utilizada para transmitir música e voz, rádio bidirecional, sistemas de gravação em fitas magnéticas e alguns sistemas de transmissão de vídeo. Em sistemas de rádio, a modulação em frequência com <a href="/wiki/Largura_de_banda" title="Largura de banda">largura de banda</a> suficiente fornece uma vantagem em cancelar ruídos que ocorrem naturalmente. </p> <figure class="mw-halign-right" typeof="mw:File/Thumb"><a href="/wiki/Ficheiro:Amfm3-en-de.gif" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/a/a4/Amfm3-en-de.gif/200px-Amfm3-en-de.gif" decoding="async" width="200" height="156" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/a/a4/Amfm3-en-de.gif 1.5x" data-file-width="256" data-file-height="200" /></a><figcaption></figcaption></figure> <p>A qualidade da transmissão por modulação em frequência fez com que esta fosse adotada para a <a href="/wiki/Transmiss%C3%A3o" class="mw-disambig" title="Transmissão">transmissão</a> do <a href="/wiki/%C3%81udio" class="mw-disambig" title="Áudio">áudio</a> da <a href="/wiki/TV" class="mw-redirect" title="TV">TV</a> aberta, tanto em <a href="/wiki/Very_High_Frequency" class="mw-redirect" title="Very High Frequency">VHF</a> (canais 2 a 13) quanto em <a href="/wiki/Ultra_High_Frequency" class="mw-redirect" title="Ultra High Frequency">UHF</a> (canais 14 a 69). </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Desvantagens">Desvantagens</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Modula%C3%A7%C3%A3o_em_frequ%C3%AAncia&veaction=edit&section=1" title="Editar secção: Desvantagens" class="mw-editsection-visualeditor"><span>editar</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Modula%C3%A7%C3%A3o_em_frequ%C3%AAncia&action=edit&section=1" title="Editar código-fonte da secção: Desvantagens"><span>editar código-fonte</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Uma das desvantagens dos receptores FM é de apresentarem uma característica conhecida como <i>efeito de captura</i>. Esse efeito ocorre da seguinte maneira: se existirem dois ou mais sinais de FM emitidos na mesma frequência, o receptor de FM irá responder ao sinal de maior potência e ignorar os menores (os restantes). </p><p>Pode variar de sinal (conforme a distância) podendo oscilar por exemplo de lugares mais altos e baixos. </p> <div class="mw-heading mw-heading2"><h2 id="Ver_também"><span id="Ver_tamb.C3.A9m"></span>Ver também</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Modula%C3%A7%C3%A3o_em_frequ%C3%AAncia&veaction=edit&section=2" title="Editar secção: Ver também" class="mw-editsection-visualeditor"><span>editar</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Modula%C3%A7%C3%A3o_em_frequ%C3%AAncia&action=edit&section=2" title="Editar código-fonte da secção: Ver também"><span>editar código-fonte</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/DX" title="DX">DX</a></li> <li><a href="/wiki/Modula%C3%A7%C3%A3o" title="Modulação">Modulação</a></li> <li><a href="/wiki/Modula%C3%A7%C3%A3o_em_amplitude" title="Modulação em amplitude">Modulação em amplitude</a></li> <li><a href="/wiki/Modula%C3%A7%C3%A3o_em_fase" title="Modulação em fase">Modulação em fase</a></li> <li><a href="/wiki/Modula%C3%A7%C3%A3o_por_deslocamento_de_fase" title="Modulação por deslocamento de fase">Modulação por deslocamento de fase</a></li> <li><a href="/wiki/Propaga%C3%A7%C3%A3o_de_radiofrequ%C3%AAncia" title="Propagação de radiofrequência">Propagação de radiofrequência</a></li></ul> <h2 id="Referências" style="cursor: help;" title="Esta seção foi configurada para não ser editável diretamente. Edite a página toda ou a seção anterior em vez disso."><span id="Refer.C3.AAncias"></span>Referências</h2> <div class="reflist" style="list-style-type: decimal;"></div> <div class="mw-heading mw-heading2"><h2 id="Ligações_externas"><span id="Liga.C3.A7.C3.B5es_externas"></span>Ligações externas</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Modula%C3%A7%C3%A3o_em_frequ%C3%AAncia&veaction=edit&section=3" title="Editar secção: Ligações externas" class="mw-editsection-visualeditor"><span>editar</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Modula%C3%A7%C3%A3o_em_frequ%C3%AAncia&action=edit&section=3" title="Editar código-fonte da secção: Ligações externas"><span>editar código-fonte</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><cite class="citation web"><a rel="nofollow" class="external text" href="https://www.radios.pt/">«Portal Rádios – Directório das emissoras de rádio em Portugal»</a></cite><span title="ctx_ver=Z39.88-2004&rfr_id=info%3Asid%2Fpt.wikipedia.org%3AModula%C3%A7%C3%A3o+em+frequ%C3%AAncia&rft.btitle=Portal+R%C3%A1dios+%93+Direct%C3%B3rio+das+emissoras+de+r%C3%A1dio+em+Portugal&rft.genre=unknown&rft_id=https%3A%2F%2Fwww.radios.pt%2F&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook" class="Z3988"><span style="display:none;"> </span></span></li> <li><cite class="citation web"><a rel="nofollow" class="external text" href="https://www.mundodaradio.info/">«Mundo da Rádio – website dedicado um dos mais importantes meios de comunicação social: a rádio»</a></cite><span title="ctx_ver=Z39.88-2004&rfr_id=info%3Asid%2Fpt.wikipedia.org%3AModula%C3%A7%C3%A3o+em+frequ%C3%AAncia&rft.btitle=Mundo+da+R%C3%A1dio+%93+website+dedicado+um+dos+mais+importantes+meios+de+comunica%C3%A7%C3%A3o+social%3A+a+r%C3%A1dio&rft.genre=unknown&rft_id=https%3A%2F%2Fwww.mundodaradio.info%2F&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook" class="Z3988"><span style="display:none;"> </span></span></li> <li><cite class="citation web"><a rel="nofollow" class="external text" href="https://www.mundodaradio.info/livro/manualdaradio.pdf">«Manual da Rádio – pequeno livro digital e gratuito sobre a rádio»</a> <span style="font-size:85%;">(PDF)</span></cite><span title="ctx_ver=Z39.88-2004&rfr_id=info%3Asid%2Fpt.wikipedia.org%3AModula%C3%A7%C3%A3o+em+frequ%C3%AAncia&rft.btitle=Manual+da+R%C3%A1dio+%93+pequeno+livro+digital+e+gratuito+sobre+a+r%C3%A1dio&rft.genre=unknown&rft_id=https%3A%2F%2Fwww.mundodaradio.info%2Flivro%2Fmanualdaradio.pdf&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook" class="Z3988"><span style="display:none;"> </span></span></li></ul> <style data-mw-deduplicate="TemplateStyles:r69328899">.mw-parser-output .navbox{box-sizing:border-box;border:1px solid #a2a9b1;width:100%;clear:both;font-size:88%;text-align:center;padding:1px;margin:0 auto 0}.mw-parser-output .navbox .navbox{margin-top:0}.mw-parser-output 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ultravioleta">Ultravioleta</a>  <b>·</b>  <a href="/wiki/Espectro_vis%C3%ADvel" title="Espectro visível">Espectro visível</a>  <b>·</b>  <a href="/wiki/Radia%C3%A7%C3%A3o_infravermelha" title="Radiação infravermelha">Infravermelho</a>  <b>·</b>  <a href="/wiki/Radia%C3%A7%C3%A3o_Terahertz" title="Radiação Terahertz">Raios T</a>  <b>·</b>  <a href="/wiki/Micro-ondas" title="Micro-ondas">Micro-ondas</a>  <b>·</b>  <a href="/wiki/Onda_de_r%C3%A1dio" title="Onda de rádio">Rádio</a></b> <figure class="mw-halign-center" typeof="mw:File"><a href="/wiki/Ficheiro:Frequency_vs._wave_length.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/6/62/Frequency_vs._wave_length.svg/500px-Frequency_vs._wave_length.svg.png" decoding="async" width="500" height="65" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/62/Frequency_vs._wave_length.svg/750px-Frequency_vs._wave_length.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/62/Frequency_vs._wave_length.svg/1000px-Frequency_vs._wave_length.svg.png 2x" data-file-width="800" data-file-height="104" /></a><figcaption></figcaption></figure><i><big>←</big> menor comprimento de onda<span class="nowrap">       </span>maior comprimento de onda →</i></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background:lavender;"><a href="/wiki/Espectro_vis%C3%ADvel" title="Espectro visível">Espectro visível</a></th><td class="navbox-list navbox-odd" style="text-align:left;border-left-width:2px;border-left-style:solid;width:100%;padding:0px;line-height:1.5em;"><div style="padding:0em 0.25em"><a href="/wiki/Vermelho" title="Vermelho">Vermelho</a>  <b>·</b>  <a href="/wiki/Laranja_(cor)" title="Laranja (cor)">Alaranjado</a>  <b>·</b>  <a href="/wiki/Amarelo" title="Amarelo">Amarelo</a>  <b>·</b>  <a href="/wiki/Verde" title="Verde">Verde</a>  <b>·</b>  <a href="/wiki/Azul" title="Azul">Azul</a>  <b>·</b>  <a href="/wiki/Anil" title="Anil">Anil</a>  <b>·</b>  <a href="/wiki/Violeta_(cor)" title="Violeta (cor)">Violeta</a></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background:lavender;"><a href="/wiki/Micro-ondas" title="Micro-ondas">Micro-ondas</a></th><td class="navbox-list navbox-even" style="text-align:left;border-left-width:2px;border-left-style:solid;width:100%;padding:0px;line-height:1.5em;"><div style="padding:0em 0.25em"><a href="/wiki/Banda_W" title="Banda W">Banda W</a>  <b>·</b>  <a href="/wiki/Banda_V" title="Banda V">Banda V</a>  <b>·</b>  <a href="/wiki/Banda_Ka" title="Banda Ka">Banda K<sub>a</sub></a>  <b>·</b>  <a href="/wiki/Banda_K" title="Banda K">Banda K</a>  <b>·</b>  <a href="/wiki/Banda_Ku" title="Banda Ku">Banda K<sub>u</sub></a>  <b>·</b>  <a href="/wiki/Banda_X" title="Banda X">Banda X</a>  <b>·</b>  <a href="/wiki/Banda_C" title="Banda C">Banda C</a>  <b>·</b>  <a href="/wiki/Banda_S" title="Banda S">Banda S</a>  <b>·</b>  <a href="/wiki/Banda_L" title="Banda L">Banda L</a></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background:lavender;"><a href="/wiki/Onda_de_r%C3%A1dio" title="Onda de rádio">Ondas de rádio</a></th><td class="navbox-list navbox-odd" style="text-align:left;border-left-width:2px;border-left-style:solid;width:100%;padding:0px;line-height:1.5em;"><div style="padding:0em 0.25em"><a href="/wiki/Frequ%C3%AAncia_extremamente_alta" title="Frequência extremamente alta">EHF</a>  <b>·</b>  <a href="/wiki/Frequ%C3%AAncia_super_alta" title="Frequência super alta">SHF</a>  <b>·</b>  <a href="/wiki/Frequ%C3%AAncia_ultra-alta" title="Frequência ultra-alta">UHF</a>  <b>·</b>  <a href="/wiki/Frequ%C3%AAncia_muito_alta" title="Frequência muito alta">VHF</a>  <b>·</b>  <a href="/wiki/Onda_curta" title="Onda curta">HF</a>  <b>·</b>  <a href="/wiki/Frequ%C3%AAncia_m%C3%A9dia" title="Frequência média">MF</a>  <b>·</b>  <a href="/wiki/LF" class="mw-redirect" title="LF">LF</a>  <b>·</b>  <a href="/wiki/Frequ%C3%AAncia_muito_baixa" title="Frequência muito baixa">VLF</a>  <b>·</b>  <a href="/wiki/Frequ%C3%AAncia_ultrabaixa" title="Frequência ultrabaixa">ULF</a>  <b>·</b>  <a href="/wiki/Frequ%C3%AAncia_superbaixa" title="Frequência superbaixa">SLF</a>  <b>·</b>  <a href="/wiki/Frequ%C3%AAncia_extremamente_baixa" title="Frequência extremamente baixa">ELF</a></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background:lavender;"><a href="/wiki/Comprimento_de_onda" title="Comprimento de onda">Tipos de comprimento de onda</a></th><td class="navbox-list navbox-even" style="text-align:left;border-left-width:2px;border-left-style:solid;width:100%;padding:0px;line-height:1.5em;"><div style="padding:0em 0.25em"><a href="/wiki/Micro-ondas" title="Micro-ondas">Micro-ondas</a>  <b>·</b>  <a href="/wiki/Onda_curta" title="Onda curta">Onda curta</a>  <b>·</b>  <a href="/wiki/Onda_m%C3%A9dia" title="Onda média">Onda média</a>  <b>·</b>  <a href="/wiki/Onda_longa" title="Onda longa">Onda longa</a>  <b>·</b>  <a href="/wiki/Onda_tropical_(radiodifus%C3%A3o)" title="Onda tropical (radiodifusão)">Onda tropical</a></div></td></tr></tbody></table></div>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?useformat=desktop&type=1x1&usesul3=0" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Obtida de "<a dir="ltr" href="https://pt.wikipedia.org/w/index.php?title=Modulação_em_frequência&oldid=68197441">https://pt.wikipedia.org/w/index.php?title=Modulação_em_frequência&oldid=68197441</a>"</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a href="/wiki/Especial:Categorias" title="Especial:Categorias">Categorias</a>: <ul><li><a href="/wiki/Categoria:D%C3%A9cada_de_1930_na_ci%C3%AAncia" title="Categoria:Década de 1930 na ciência">Década de 1930 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