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《射頻微帶陣列天線(xiàn)設(shè)計(jì)畢業(yè)論文》由會(huì)員上傳分享，免費(fèi)在線(xiàn)閱讀，更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫(kù)。
1、射頻微帶陣列天線(xiàn)設(shè)計(jì)摘要微帶天線(xiàn)是一種具有體積小、重量輕、剖面低、易于載體共形、易于與微波集成電路一起集成等諸多優(yōu)點(diǎn)的天線(xiàn)形式，目前已在無(wú)線(xiàn)通信、遙感、雷達(dá)等諸多領(lǐng)域得到了廣泛應(yīng)用。同時(shí)研究也發(fā)現(xiàn)由于微帶天線(xiàn)其自身結(jié)構(gòu)特點(diǎn)，存在一些缺點(diǎn)，例如頻帶窄、增益低、方向性差等。通常將若干單個(gè)微帶天線(xiàn)單元按照一定規(guī)律排列起來(lái)組成微帶陣列天線(xiàn)，來(lái)增強(qiáng)天線(xiàn)的方向性，提高天線(xiàn)的增益。本文在學(xué)習(xí)微帶天線(xiàn)和天線(xiàn)陣的原理和基本理論，加以分析，利用Ansoft公司的高頻電磁場(chǎng)仿真軟件HFSS，設(shè)計(jì)了中心頻率在10GHz的4元均勻直線(xiàn)微帶陣列，優(yōu)化和調(diào)整了相關(guān)參數(shù)，然后分別對(duì)單個(gè)陣元和天線(xiàn)陣進(jìn)行仿真，對(duì)仿真結(jié)果進(jìn)行
2、分析，對(duì)比兩者在相關(guān)參數(shù)的差異。最后得到的研究結(jié)果表明，微帶天線(xiàn)陣列相較于單個(gè)微帶天線(xiàn)，由于陣元間存在互耦效應(yīng)以及存在饋電網(wǎng)絡(luò)的影響，微帶陣列天線(xiàn)的回波損耗要大于單個(gè)陣元。但是天線(xiàn)陣列增益明顯大于單個(gè)微帶天線(xiàn)，且陣列天線(xiàn)比單個(gè)陣元具有更好的方向性。關(guān)鍵詞：微帶天線(xiàn)微帶陣列天線(xiàn)方向性增益HFSS仿真Designof?Radio-Frequency?MicrostripArrayAntennaABSTRACTMicrostripantennaisakindofantennaformwithmanyadvantageslike,smallsize,lightweight,lowprofile,e
3、asy-to-carrierconformal,easyintegrationwithmanyotherofmicrowaveintegratedcircuitsandsoon.NowmicrostriparrayhavebeenwildlyappliedinthefiledofwirelessIcommunications,remotesensingandradar,andmanyotherfiled.Whilesomestudyalsofoundthatbecauseofthemicrostripantenna’sstructuralcharacteristics,thereareso
4、medisadvantages,suchasnarrow-band,lowgain,poordirectivity.Typicallyweusemicrostripantennaelementsarrangedinaccordancewithcertainlawstogethertoformamicrostriparrayantennatoenhancethedirectivityandimprovethegainoftheantenna.Inthispaper,afterlearningthebasictheoryandprinciplesaboutmicrostripantennaan
5、dantennaarray,Idesignedtwokindofantennamodelswith10GHzofcenterfrequency,oneisthesingleantenna,theotheroneisanantennaarraywith4singleantenna.ThenusingAnsoft'shighfrequencyelectromagneticsimulationsoftwareHFSS,optimizeandadjusttherelevantparameters.Afterthat,weusedtheHFSStosimulatethesinglearrayelem
6、entandanantennaarrayseparately.Thenanalyzedthesimulationresults,comparedtothedifferenceintherelevantparameters.Theresultingsuggestedthatbecauseofthepresenceofmutualcouplingeffectsandtheimpactofthepresenceofthefeednetworkbetweenthepickets,thereturnlossofmicrostripantennaarrayisgreaterthanthesinglem
7、icrostripantennaarray,butantennagainissignificantlylargerthanasinglearrayantenna,andtheantennaarrayhasabetterdirectivitythanthesinglemicrostripantenna.IIKeywords:MicrostripArrayMicrostripArrayAntennaDirectivityGa
