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1、分類(lèi)號(hào):密級(jí):UDC:編號(hào):汽車(chē)防撞雷達(dá)天線的設(shè)計(jì)ADESIGNOFAUTOMOTIVEANTI-COLLISIONRADARANTENNA學(xué)位授予單位及代碼:(10186)學(xué)科專(zhuān)業(yè)名稱(chēng)及代碼:(0809)研究方向:申請(qǐng)學(xué)位級(jí)別:指導(dǎo)教師:研究生:論文起止時(shí)間:2009.11—2010.12摘要近年來(lái),毫米波汽車(chē)防撞雷達(dá)系統(tǒng)已經(jīng)成為汽車(chē)應(yīng)用領(lǐng)域的熱點(diǎn),具有廣闊的應(yīng)用前景。針對(duì)系統(tǒng)前端具有高穩(wěn)定性、體積小和成本低等的要求,本文結(jié)合毫米波具有波長(zhǎng)短、在霧、雪、塵埃等環(huán)境中有良好的傳播特性,設(shè)計(jì)出適合于毫米波
2、汽車(chē)防撞雷達(dá)系統(tǒng)的圓極化微帶天線。具體工作如下:1.在分析微帶天線理論和圓極化技術(shù)的基礎(chǔ)上,本文應(yīng)用AnsoftHFSS軟件設(shè)計(jì)了單個(gè)圓極化微帶天線。應(yīng)用理論計(jì)算天線的幾何尺寸,并通過(guò)軟件仿真對(duì)天線參數(shù)優(yōu)化,給出合理的幾何尺寸及參數(shù)值。2.在研究單個(gè)天線的基礎(chǔ)上,使用相位旋轉(zhuǎn)法(sequentialrotationmethod)對(duì)4陣元圓極化陣列天線進(jìn)行了設(shè)計(jì),諧振點(diǎn)在35GHz的附近,阻抗帶寬達(dá)到17%以上,軸比帶寬達(dá)到6%以上,增益在以上,水平方位掃描角約為,垂直高低掃描角約為。在此基礎(chǔ)上,將陣元數(shù)
3、擴(kuò)展至64,微帶陣列天線的增益達(dá)到dB以上,水平方位掃描角約為,垂直高低掃描角約為。本文設(shè)計(jì)的毫米波圓極化微帶陣列天線具有體積小、重量輕、結(jié)構(gòu)緊湊及便于集成等優(yōu)點(diǎn),能夠滿足毫米波汽車(chē)防撞雷達(dá)系統(tǒng)的需要。關(guān)鍵詞:毫米波汽車(chē)防撞圓極化微帶天線相位旋轉(zhuǎn)法ABSTRACTInrecentyearsautomotiveanti-collisionmillimeter-wave(MMW)radarsystemiswidelyusedinautomotiveapplication.Basedontherequireo
4、fhighstabilityandsmallsizefortheanti-collisionradarfront-end,acircularlypolarized(CP)microstrippatchantennahasbeendesignedconcerningitsgoodradiationcharacteristicslikeshortwavelength,widebandandstrongpenetrabilityinsnow,rainandfogetc.Thedetailedworkinclu
5、des:1.Basedonanalyzingthemicrostripantennatheoryandcircularlypolarizationtechnology,aCPmicrostrippatchantennahasbeendesignedusingAnsoftHFSS.Thethesishascaculatedthesizesoftheantennabyusingtheory,optimizedtheantennaparameterswithsoftwaresimulatedandprovid
6、edthereasonablesizesandparameters.2.BasedonanalyzingsingleCPmicrostripantenna,afour-elementCParrayantennahasbeendesignedusingsequentialrotationmethod.Thearrayworksat35GHzwithimpedancebandwidthover17%,axialratiobandwidthover6%andgainover12dB,anditsazimuth
7、angleandverticalanglereachesaboutand,respectively.Basedontheaboveanalysis,64-elementCParrayantennahasbeensimulated,andthegainhasreached24dB,anditsazimuthangleandverticalanglereachesaboutand,respectively.TheMMWCPantennadesignedinthisthesishastheadvantages
8、ofsmallvolume,lessweight,compactstructureandeasytobeintegrated,whichcansatisfytheneedofanti-collisionmillimeter-wave(MMW)radarsystem.Keywords:millimeter-waveautomotiveanti-collisioncircularlypolarizedmicrostripantennaseque