排序方式: 共有12条查询结果,搜索用时 46 毫秒
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研究了一种具有良好工作性能的微带-喇叭组合右旋圆极化天线,首先设计了一种双层宽带圆极化微带天线结构,同时满足电压驻波比(VSWR)≤2,轴比(AR)≤4 dB的频带宽度(Bw)≥24%,主极化增益大于9 dBi;通过引入角锥喇叭结构,在工作频带内将天线增益提高到12 dBi以上,同时不影响原天线的其他性能。为更好了解微带-喇叭组合右旋圆极化天线的性能,并快速而准确地设计该天线结构,对天线主要几何参数进行了适当分析和研究。 相似文献
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An efficient hybrid method based on the method of moments(MOM)and physical optics(PO)for the analysis of radiation characteristics of an electrically large antenna-radome system is presented.Specifically,MOM is first applied to the antenna to find the current on its surface,and then the equivalent PO currents produced by the antenna radiation are assumed on the radome wall.When the coupling of the PO currents and antenna current is considered,the coupling matrix is divided into a series of partial matrices,in order to deduce the memory requirement and accelerate the evaluation process.Numerical results indicate that the proposed hybrid PO-MOM method is accurate and efficient. 相似文献
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Recently ,rigorousfull wavesolutionsbasedonthemomentmethodhavebeen presentedtoanalyzethemutualcouplingeffectbetweenthecylindricallyconformalmicrostripantennas[1,2 ] .Buttherearestilltwoproblemstobesolved .①Itiswellknownthatthetermsofcircumfer entialserieswillincreaserapidlywhentheradiusofthecylinderbecomeslarge .So ,itisverydifficulttoobtaintheconvergentresultsofthespectralfunctionintegrandsevenbyusingthesuperworkstationsuchasVAX6 42 0duetothedirectcomputationofhighorderBesselfunctionswithl… 相似文献
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一种宽频带圆柱共形微带天线全波分析和设计 总被引:1,自引:1,他引:1
采用双层介质双贴片结构展宽天线的阻抗带宽,并利用小的贴片电容补偿由厚介质衬底引起的探针电感效应,进一步扩展了频带宽度.基于共形FDTD法结合圆柱分层媒质中并矢格林函数的新方法,对此类天线的近场和远场特性进行了严格的全波分析.提出了系统的设计流程,使得天线的设计过程变得简单易行.设计和仿真结果表明,在不增加剖面厚度的情况下,工作于L和C波段的天线带宽(VSWR≤2.0)可达近30%甚至更宽. 相似文献
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