An efficient analyzing approach is presented for large slotted-waveguide antenna arrays by using hybrid finite element-boundary integral-multilevel fast multipole algorithm（FE-BI-MLFMA）in this paper.A simple computa...An efficient analyzing approach is presented for large slotted-waveguide antenna arrays by using hybrid finite element-boundary integral-multilevel fast multipole algorithm（FE-BI-MLFMA）in this paper.A simple computation model for slotted-waveguide antenna is presented by using thin current probe excitation and perfectly matched layer（PML）absorber.Since each slotted-waveguide antenna can be considered as a single sub-domain,the domain decomposition algorithm（DDA）can be applied to FE-BI-MLFMA to greatly reduce the computation resources and achieve high efficiency.This DDA-FE-BI-MLMFA is parallelized to further strength its capability.The comparisons of the computed radiation patterns with measured data and results from the commercial software show that our method has good accuracy for slottedwaveguide array.Then the influence of mutual coupling between adjacent slotted-waveguides is studied.To demonstrate capability of the presented method,a carefully designed large X-band slotted-waveguide antenna array containing eighteen waveguides with Taylor amplitude and inverse phase excitation distribution are analyzed in the paper.展开更多
设计了一种波导宽边细缝缝隙天线,并利用Ansoft公司的电磁仿真软件HFSS(high frequency structure simulator)进行仿真.电磁仿真软件HFSS能给出波导宽边细缝缝隙天线的回波损耗和辐射方向图.基于同轴线理论、波导宽边缝隙天线理论和梯...设计了一种波导宽边细缝缝隙天线,并利用Ansoft公司的电磁仿真软件HFSS(high frequency structure simulator)进行仿真.电磁仿真软件HFSS能给出波导宽边细缝缝隙天线的回波损耗和辐射方向图.基于同轴线理论、波导宽边缝隙天线理论和梯形渐变器理论设计波导宽边细缝缝隙天线,采用HFSS仿真设计该天线,并制造波导宽边细缝缝隙天线.测试所设计的天线,分析了影响波导宽边细缝缝隙天线E面和H面方向图的主要原因,为今后设计和制造波导缝隙天线提供一种分析方法,对实际工程应用有着重要的意义.展开更多
针对W波段波导缝隙天线加工难度高、加工后缝隙尺寸不易修改的问题,提出了一种改进型缝隙电导函数提取方法.首先,根据工艺可实现性,设定合理的波导辐射面壁厚和缝隙宽度;然后,应用HFSS软件计算出不同缝隙切入深度和缝隙倾斜角度的缝隙...针对W波段波导缝隙天线加工难度高、加工后缝隙尺寸不易修改的问题,提出了一种改进型缝隙电导函数提取方法.首先,根据工艺可实现性,设定合理的波导辐射面壁厚和缝隙宽度;然后,应用HFSS软件计算出不同缝隙切入深度和缝隙倾斜角度的缝隙电导值;最后,利用Matlab软件拟合出电导函数曲线,并进行阶梯状的分段近似,以简化加工工艺复杂度.基于优化设计结果,加工出4套天线样品,采用紧缩场测试方法对天线进行辐射方向图测量.结果表明,在75~79 GHz的频带内,天线增益均大于23.5 d Bi,E面3 d B波束宽度为1.2°,旁瓣电平低于-20 d B.当频率从75 GHz扫描至79 GHz时,E面3 d B波束覆盖范围为5.5°.4套天线的性能测试结果展现出较好的一致性,从而验证了设计方法的正确性和有效性.展开更多
基金Supported by the National Key Basic Research Program(973 Program)(2012CB720702,61320602)the 111 Project of China(B14010)the National Natural Science Foundation of China(61371002)
文摘An efficient analyzing approach is presented for large slotted-waveguide antenna arrays by using hybrid finite element-boundary integral-multilevel fast multipole algorithm（FE-BI-MLFMA）in this paper.A simple computation model for slotted-waveguide antenna is presented by using thin current probe excitation and perfectly matched layer（PML）absorber.Since each slotted-waveguide antenna can be considered as a single sub-domain,the domain decomposition algorithm（DDA）can be applied to FE-BI-MLFMA to greatly reduce the computation resources and achieve high efficiency.This DDA-FE-BI-MLMFA is parallelized to further strength its capability.The comparisons of the computed radiation patterns with measured data and results from the commercial software show that our method has good accuracy for slottedwaveguide array.Then the influence of mutual coupling between adjacent slotted-waveguides is studied.To demonstrate capability of the presented method,a carefully designed large X-band slotted-waveguide antenna array containing eighteen waveguides with Taylor amplitude and inverse phase excitation distribution are analyzed in the paper.
文摘设计了一种波导宽边细缝缝隙天线,并利用Ansoft公司的电磁仿真软件HFSS(high frequency structure simulator)进行仿真.电磁仿真软件HFSS能给出波导宽边细缝缝隙天线的回波损耗和辐射方向图.基于同轴线理论、波导宽边缝隙天线理论和梯形渐变器理论设计波导宽边细缝缝隙天线,采用HFSS仿真设计该天线,并制造波导宽边细缝缝隙天线.测试所设计的天线,分析了影响波导宽边细缝缝隙天线E面和H面方向图的主要原因,为今后设计和制造波导缝隙天线提供一种分析方法,对实际工程应用有着重要的意义.
文摘针对W波段波导缝隙天线加工难度高、加工后缝隙尺寸不易修改的问题,提出了一种改进型缝隙电导函数提取方法.首先,根据工艺可实现性,设定合理的波导辐射面壁厚和缝隙宽度;然后,应用HFSS软件计算出不同缝隙切入深度和缝隙倾斜角度的缝隙电导值;最后,利用Matlab软件拟合出电导函数曲线,并进行阶梯状的分段近似,以简化加工工艺复杂度.基于优化设计结果,加工出4套天线样品,采用紧缩场测试方法对天线进行辐射方向图测量.结果表明,在75~79 GHz的频带内,天线增益均大于23.5 d Bi,E面3 d B波束宽度为1.2°,旁瓣电平低于-20 d B.当频率从75 GHz扫描至79 GHz时,E面3 d B波束覆盖范围为5.5°.4套天线的性能测试结果展现出较好的一致性,从而验证了设计方法的正确性和有效性.
