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SchoolofElectronic&InformationEngineeringSouthChinaUniversitySouthChinaUniversityofResearchInstituteofAntennas&RFTechniquesSchoolofElectronic&InformationEngineering7.1V形振SouthChinaUniversitySouthChinaUniversityof線。如V形振子和曲線振子,其思路是利用采用長度和角度可調(diào)的V形振子是最常用的選ResearchInstituteofAntennas&RFTechniquesSchoolofElectronic&InformationEngineeringV形振子的設(shè)計:根據(jù)工作頻率,確定振子的SouthChinaUniversitySouthChinaUniversityofh采用矩量0.5h3的V形振子,在扇hh152()2h

388(

0.5hhhh11.5()2h

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1.5hhD2.95(h

ResearchInstituteofAntennas&RFTechniquesSchoolofElectronic&InformationEngineering計算表明:h=0.75的VSouthChinaUniversityof最大輻射方SouthChinaUniversityof角度ResearchInstituteofAntennas&RFTechniquesSchoolofElectronic&InformationEngineering折合振子(folded-dipole)是常用的線天線之一SouthChinaSouthChinaUniversityofResearchInstituteofAntennas&RFTechniquesSchoolofElectronic&InformationEngineeringSouthChinaUniversityofSouthChinaUniversityofL/ResearchInstituteofAntennas&RFTechniquesSchoolofElectronic&InformationEngineeringSouthChinaSouthChinaUniversityofResearchInstituteofAntennas&RFTechniquesSchoolofElectronic&InformationEngineeringSouthChinaUniversitySouthChinaUniversityofV1Z11I1Z12 V2Z12I1VinZ11IinZ120Z12Iin

Z Vin/IinZ11Z12I2/ Z2/ ResearchInstituteofAntennas&RFTechniquesSchoolofElectronic&InformationEngineeringV1V2SouthSouthChinaUniversityofI1I2

eeVe(Z11Z12)Ie ee VeZd

其中,Zd為單個對稱振子的輸入阻抗ResearchInstituteofAntennas&RFTechniquesSchoolofElectronic&InformationEngineeringV1V2 I1I2SouthChinaUniversityof相當(dāng)SouthChinaUniversityof

Vo(Z11Z12)IoL/2的短路雙導(dǎo)線輸線。于VoIoZtIojZ0tan(L/Z11Z12其中,Zt、Z0分別為雙

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VinVeResearchInstituteofAntennas&RFTechniquesSchoolofElectronic&InformationEngineeringSouthChinaUniversityof VinVoVe Vin/2Vin/ SouthChinaUniversityof IoIe (1/2Zd1/Zt)Vin/ 2ZdZt2ZdZ11Z12ZtZ11

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Z ZdZt/ 2ZdZResearchInstituteofAntennas&RFTechniquesSchoolofElectronic&InformationEngineeringSouthChinaUniversityofYin1/Zin1/4ZSouthChinaUniversityof 2Z0tan(L/對于半波折合振子

Z tan 4Z=4 半波折合振子的輸入阻抗是半波對稱振子的4倍。ResearchInstituteofAntennas&RFTechniquesSchoolofElectronic&InformationEngineeringSouthChinaUniversityofSouthChinaUniversityofResearchInstituteofAntennas&RFTechniquesSchoolofElectronic&InformationEngineeringSouthChinaUniversityofSouthChinaUniversityof折合振子常被用于FM廣播的接收天ResearchInstituteofAntennas&RFTechniquesSchoolofElectronic&InformationEngineeringSouthChinaSouthChinaUniversityofZin(1c2d

(L/通常a1,a2遠(yuǎn)小于d,c近似cln(d/ln(d/a2

俯視 端視ResearchInstituteofAntennas&RFTechniquesSchoolofElectronic&InformationEngineeringSouthChinaSouthChinaUniversityofResearchInstituteofAntennas&RFTechniquesSchoolofElectronic&InformationEngineeringSouthChinaSouthChinaUniversityofResearchInstituteofAntennas&RFTechniquesSchoolofElectronic&InformationEngineeringSouthChinaUniversityofSouthChinaUniversityofI1I0costI2I0sinResearchInstituteofAntennas&RFTechniquesSchoolofElectronic&InformationEngineeringE1KI0costSouthChinaUniversityofE2KI0sint )KISouthChinaUniversityof0o0KE2EE1E2KI0(costsinsintcos)KI0sin(E1KI0E2KI0 E KI0cost+KI0sintKI0 ResearchInstituteofAntennas&RFTechniquesSchoolofElectronic&InformationEngineeringf()sin(SouthChinaUniversityof其形狀為SouthChinaUniversityof時間變化8字形圍角頻率旋轉(zhuǎn),最大點旋數(shù),場是圓極化的。ResearchInstituteofAntennas&RFTechniquesSchoolofElectronic&InformationEngineeringSouthChinaUniversityofSouthChinaUniversityof cosf() coscos(cos ResearchInstituteofAntennas&RFTechniquesSchoolofElectronic&InformationEngineeringSouthChinaSouthChinaUniversityof5%的起伏

ResearchInstituteofAntennas&RFTechniquesSchoolofElectronic&InformationEngineering對于N層十字天線陣,增益可近SouthSouthChinaUniversityofResearchInstituteofAntennas&RFTechniquesSchoolofElectronic&InformationEngineeringSouthChinaSouthChinaUniversityof典型結(jié)構(gòu),是金ResearchInstituteofAntennas&RFTechniquesSchoolofElectronic&InformationEngineeringSouthChinaUniversityofSouthChinaUniversityofSouthChinaUniversityofSouthChinaUniversityof是一致的。ResearchInstituteofAntennas&RFTechniquesSchoolofElectronic&InformationEngineeringEEA-A點同EEA-A點同SouthChinaUniversityofSouthChinaUniversityofSouthChinaUniversityofResearchInstituteofAntennas&RFTechniquesSchoolofElectronic&InformationEngineeringSouthChinaUniversityofSouthChinaUniversityof ResearchInstituteofAntennas&RFTechniquesSchoolofElectronic&InformationEngineeringSouthChinaUniversityofSouthChinaUniversityofdG2.44d為層間距離,N為蝙蝠翼的層數(shù)ResearchInstituteofAntennas&RFTechniquesSchoolofElectronic&InformationEngineering與十字形振子Sou

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