資源描述:
《雙頻圓極化微帶天線的優(yōu)化設(shè)計(jì)-論文.pdf》由會(huì)員上傳分享,免費(fèi)在線閱讀,更多相關(guān)內(nèi)容在行業(yè)資料-天天文庫。
1、科技通報(bào)第31卷第7期Vol.31No.72015年7月BULLETINOFSCIENCEANDTECHNOLOGYJul.2015雙頻圓極化微帶天線的優(yōu)化設(shè)計(jì)房明明(威海職業(yè)學(xué)院信息工程系,山東威海264210)摘要:如今的單饋點(diǎn)雙層微帶天線具有厚度大,回?fù)軗p耗高的弊端,制約了其微型化以及小周期特征的發(fā)展。依據(jù)微帶天線的工作特征曲線,設(shè)計(jì)了一種雙頻段圓極化GPS微帶天線,在考慮回波損耗的基礎(chǔ)上,通過增加圓環(huán)形貼片,改變貼片間空氣層的厚度,對增加芯片的介電常數(shù)進(jìn)行研究,采用腔模理論分析方法,對增加圓環(huán)形貼片
2、的微帶天線干擾進(jìn)行優(yōu)化分析,使其保證抗擾性最優(yōu)。通過電磁仿真軟件HFSS11進(jìn)行仿真,結(jié)果說明,所設(shè)計(jì)的雙層微帶天線其阻的抗帶寬分別是46MHz(9.1%)以及34MHz(4.6%),具有較高的回波損耗特征以及增益,并且提高了天線設(shè)計(jì)的效率。關(guān)鍵詞:圓極化;雙頻特性;微帶天線;天線中圖分類號:TM22文獻(xiàn)標(biāo)識碼:A文章編號:1001-7119(2015)07-0179-04StudyontheDual-FrequencyBehaviorofStackedCircularlyPolarizedMicrostr
3、ipAntennaFangMingming(DepartmentofInformationEngineering,WeihaiVocationalCollege,Weihai264210,China)Abstract:Nowthesinglefeedpointofdouble-layermicrostripantennawithlargethickness,backtodialthedisadvantagesofhighloss,restrictingthedevelopmentoftheminiaturi
4、zationandthecharacteristicsofsmallcycle.Accordingtoworkingcharacteristiccurvemicrostripantenna,thedesignisakindofGPSanddual-bandcircularpolarizationmicrostripantenna,onthebasisofconsideringthereturnloss,byincreasingthecircularpatch,thethicknessoftheairlaye
5、rbetweenthepatchandthedielectricconstantofhowtoincreasethechip,usuallyadoptsthemodestheoryanalysismethod,toincreasethecircularpatchmicrostripantennainterferenceoptimizationanalysis,theperturbationresistancemakeitguaranteeoptimality.,throughtheelectromagnet
6、icsimulationsoftwareHFSS11simulationresultsshowsthatthedesignedtwo-layermicrostripantennaimpedancebandwidthoftheresistancewere46MHz(9.1%)and34MHz(4.6%),hasthehighreturnlossandgain,andimprovetheefficiencyoftheantennadesign.Keywords:circularlypolarized;dual-
7、frequencybehavior;microstripantenna;antenna當(dāng)前GPS(globalpositioningsystem)技術(shù)全面型化,文獻(xiàn)[3]通過方環(huán)形貼片,在L1實(shí)現(xiàn)阻抗帶[1]應(yīng)用在導(dǎo)航、資源勘探、物理觀測等領(lǐng)域。天線寬、3-dB軸比帶寬分別是1.1%以及0.03%的圓極的質(zhì)量好壞對于GRS接收機(jī)具有重要作用。微化GPS天線,并且要求GPS天線在L1(1575MHz)和[4,5]帶天線具有低剖面、便于集成和完成圓極化的優(yōu)L2(1227MHz)兩個(gè)頻段中實(shí)現(xiàn)圓極化。勢,在GRS
8、中具有重要的應(yīng)用價(jià)值。大多數(shù)文獻(xiàn)的GPS天線只在L1頻率上運(yùn)行,1雙頻微帶天線優(yōu)化設(shè)計(jì)研究如文獻(xiàn)[2]GPS天線在L1處采用對稱的貼片實(shí)現(xiàn)小收稿日期:2015-02-05作者簡介:房明明(1982-),女,山東威海人,工程碩士,講師,從事電子與通信工程教學(xué)工作。180科技通報(bào)第31卷本文設(shè)計(jì)了一種優(yōu)化的微帶天線設(shè)計(jì)方法。圖1描述了單饋點(diǎn)雙層圓極化微帶天線的結(jié)構(gòu)。通過雙層貼片,貼片間是空氣層,上、下層貼片處于介電常