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《半雙工調(diào)頻無線對(duì)講機(jī)的畢業(yè)論文》由會(huì)員上傳分享,免費(fèi)在線閱讀,更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫。
1、畢業(yè)設(shè)計(jì)(論文)半雙工調(diào)頻無線對(duì)講機(jī)的設(shè)計(jì)HalfduplexDesignofaFMRadio[摘 要]隨著現(xiàn)在通信技術(shù)的日新月異,各種通信設(shè)備層出不窮如電話,手機(jī),對(duì)講機(jī)等。半雙工調(diào)頻無線對(duì)講機(jī)更是在日常生活中發(fā)揮著重要的作用,半雙工對(duì)講機(jī)系統(tǒng)具有使用簡(jiǎn)單、不受網(wǎng)絡(luò)限制、通話成本低、適用范圍廣等優(yōu)點(diǎn)。它是在鑒頻混頻等技術(shù)的基礎(chǔ)上,利用無線電通信原理研發(fā)的一種通信方式本系統(tǒng)的功能在于實(shí)現(xiàn)呼叫和通話功能。無線對(duì)講電話的特點(diǎn)是可供小型單位作內(nèi)部電話使用,此外由于采用成品無線模塊,從而使制作變得很簡(jiǎn)單,成本也很低。對(duì)講電話實(shí)現(xiàn)了內(nèi)部的通話,為人們的日常生活帶來了極大的方便,值得進(jìn)
2、一步推廣,有很好的發(fā)展前景。電子技術(shù)的研究才剛剛開始,隨著這項(xiàng)技術(shù)的研究逐漸深入,涉及的研究領(lǐng)域也將更廣。希望這項(xiàng)技術(shù)的研究能為人們以后的生活、工作帶來更大的便利,為人們提供更為舒適、完美的生活方式。本論文最后對(duì)對(duì)講機(jī)的現(xiàn)狀及發(fā)展前景進(jìn)行分析。[關(guān)鍵詞]對(duì)講機(jī);半雙工;調(diào)頻HalfduplexdesignofaFMradioCommunicationEngineeringMajor renleiAbstract:Nowwiththeadvancesincommunicationtechnology,allkindsofcommunicationsequipmentemerg
3、einendlessly,suchastelephone,mobilephone,interphone,etc.Ahalfduplexradiohaveusewirelesscallsystemsimple,notaffectedbynetworkrestrictions,calllowcost,wideapplication,etc.Itispopularlyusedinfrequencymixingtechnology,onthebasisofusingradiocommunicationprincipleofakindofcommunicationresearch.A
4、tpresent,peopleontheintercomresearchhasfromMoNiHuaintodigital.Thefunctionofthissystemistorealizecallandcallfunctions.Thecharacteristicsofwirelesstalkbacktelephoneisavailableforsmallunitsforinternaluse,moreoverduetothetelephonefinishedproduct,thusmakemakewirelessmodulebecomesverysimple,thec
5、ostislow.Talkbacktelephonecalls,realizedtheinternalforPeople'sDailylifehasbroughtgreatconvenienceanddeservesfurtherpromotion,haveverygoodprospectsfordevelopment.Electronictechnologyresearchisjustbeginning,asthetechnologyresearch,involvinggraduallygoesdeepresearchrealmwillbemorewidely.Hopet
6、histechnologyresearchforpeoplelaterlife,workbringgreaterconvenience,toprovidepeoplewithmorecomfortableandperfectwayoflife.Thispaperfinallytointercomcurrentsituationanddevelopmentprospectwereanalyzed.Keywords:Interphone;Half-duplex;Frequercymodulation目錄1引言11.1半雙工無線調(diào)頻對(duì)講機(jī)的目的和意義21.2半雙工無線調(diào)頻對(duì)講機(jī)的
7、應(yīng)用31.2.1專業(yè)對(duì)講機(jī)31.2.2民用對(duì)講機(jī)31.2.3商用對(duì)講機(jī)31.2.4業(yè)余對(duì)講機(jī)32無線調(diào)頻原理43系統(tǒng)總體概述及原理53.1工作原理圖53.2工作原理54單元模塊設(shè)計(jì)54.1混頻64.2鑒頻84.2.1乘積型鑒頻器94.2.2鎖相鑒頻104.3集成選頻放大器114.4鎖相環(huán)的構(gòu)成及工作原理134.4.1鎖相環(huán)路的基本組成134.4.2鎖相環(huán)鎖相原理144.4.3集成鎖相環(huán)NE564的介紹154.5音頻功率放大電路174.5.1單調(diào)諧放大器184.5.2雙調(diào)諧放大器204.6低通帶通濾波器204.7調(diào)頻