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《雙頻圓極化微帶天線的研究和設(shè)計(jì)》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(kù)。
1、南京郵電大學(xué)碩士學(xué)位論文雙頻圓極化微帶天線的研究與設(shè)計(jì)姓名:溫丹亭申請(qǐng)學(xué)位級(jí)別:碩士專(zhuān)業(yè):電磁場(chǎng)與微波技術(shù)指導(dǎo)教師:張旭翔2011-03摘要隨著通信系統(tǒng)的發(fā)展,微帶天線在現(xiàn)代通信系統(tǒng)中發(fā)揮著越來(lái)越重要的作用。微帶天線作為通信系統(tǒng)重要部件,其性能的好壞直接影響真整個(gè)通信系統(tǒng)。為了使現(xiàn)代通信系統(tǒng)能夠工作在多個(gè)頻段,雙頻和多頻段的天線已經(jīng)成為天線設(shè)計(jì)者的重要的研究課題。如何設(shè)計(jì)小型化,高增益的雙頻圓極化天線,如何改善圓極化天線的軸比帶寬,這些都是具有相當(dāng)難度的技術(shù)。論文的最終目的是研究一款雙層結(jié)構(gòu)的雙頻圓極化天線,采用傳統(tǒng)的切角法,給出最終的仿真結(jié)果和分析
2、。全文的主要內(nèi)容如下:(a)對(duì)基于H型縫隙耦合饋電的線極化天線的進(jìn)行了設(shè)計(jì)研究,分析了H型縫隙天線的各個(gè)參量對(duì)天線的性能的影響;介紹了有關(guān)圓極化微帶天線的基本理論,結(jié)合天線圓極化的相關(guān)理論,設(shè)計(jì)出了基于H型縫隙耦合饋電的圓極化微帶天線。該天線采用了使輻射單元接地的辦法,抑制了表面波,提高了天線的增益,采用切角法實(shí)現(xiàn)天線的圓極化。(b)對(duì)雙頻圓極化微帶天線進(jìn)行了研究設(shè)計(jì),首先介紹了雙頻段天線的實(shí)現(xiàn)方法,研究了基于同軸饋電的雙頻圓極化天線,利用方環(huán)形輻射單元,使用同軸探針對(duì)其進(jìn)行饋電,設(shè)計(jì)給出了相應(yīng)的仿真結(jié)果,仿真結(jié)果表明工作在2.38GHz和2.81G
3、Hz的雙頻圓極化天線具有較高的增益、良好的雙頻特性和圓極化特性。關(guān)鍵字:微帶天線,雙頻,圓極化,H型縫隙IAbstractWtihthedevelopmentofthecommunicationsystem,microstripantennaisplayinganincreasinglyimportantroleinmoderncommunicationsystem.Astheimportantcomponentsincommunicationsystem,itsperformancewillhaveadirectimpactontruewholec
4、ommunicationsystem.Inordertomakethemoderncommunicationsystemcanworkinmultiplefrequencyband,dual-frequencyandmultiplefrequencybandantennahasbecometheimportantantennadesignerresearchtopic.Howtodesignminiaturization,highgaindual-bandcircularlypolarizedantenna,howtoimprovethecircul
5、arlypolarizedantennaARbandwidth,arefairlydifficulttechnology.Theultimategoalofthepaperistostudyatwo-layerdual-bandcircularlypolarizedantenna,adoptthetraditionalcornercutmethod,givethefinalsimulationresultsandanalysis.Themaincontentsandcontributionofthepaperasfollows:(a)Thepaper
6、designedandresearchedthebasedonthelinepolarizedantennaHaperturecouplingfeeder,analyzedtheinfluencetotheantennaperformancebytheeachparameterofHaperture;Introducedcircularpolarizationmicrostripantenna,anddesignedthetwo-layercircularpolarizationmicrostripantennasbasedonHapertureco
7、uplingfeedercombiningtherelatedtheoryofcircularlypolarizedantenna.Theantennaadoptedthemethodofmakingradiatingelementgroundingtoinhibitthesurfacewave,improvedtheantennagain,adoptedthecornercuttingmethodtoimplementtheantennacircularpolarization.(b)Thepaperstudiedanddesignedthedua
8、l-frequencymicrostripantennacircularpolarization,first