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A 3D‐printed cylindrical Luneburg lens antenna working at 26 GHz is proposed in this article. The antenna consists of a feeding waveguide, a 3D‐printed cylinder, and a pair of printed metal grids which are stuck on the side faces of the cylinder. 3D‐printed structure ensures the convenience for processing and structural integrity of the Luneburg lens. Hole drilling technology is utilized for the design of the cylindrical lens. In the E‐plane, conversion of spherical waves into planar waves is achieved based on the gradient refractive index which is realized by the gradient equivalent relative dielectric constant. The main part of the lens contains a hole drilling region to realize the desired equivalent permittivity from 1.23 to 2, while another gradual‐thickness region realize the permittivity ranges from 1.23 to 1. H‐probe method is utilized for the optimization of the gradual‐thickness region in this article. And for the H‐plane, with the grids, H‐field distribution is optimized compared with the Luneburg lens antenna without the loading grids. Thus, the side lobe level (SLL) in H‐plane could be reduced. Meanwhile, a narrower half power beamwidth (HPBW) in H‐plane will be obtained due to the metal grids. Experiment results illustrate the feasibility and validity of the proposed 3D‐printed cylindrical Luneburg lens antenna.  相似文献   
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阵列天线相位中心的计算与分析   总被引:1,自引:0,他引:1  
为了得到阵列天线的相位中心,本文从阵列天线的场表达式推导出阵列天线远场区的相位方向图与选取的参考点之间的关系式。并根据该关系式,应用最小二乘法得出了求解阵列天线的视在相心的方法。结合得出的结论,对一个矩形平面阵进行了仿真实验,实验证实了本方法的有效性。同时发现,阵列单元在不同角域内对应的视在相心不同,并且阵列天线的视在相心主要取决于阵列单元在相应角域内的视在相心。  相似文献   
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为满足通信系统在天线增益方面的需求,通过将透波增强特性应用于天线设计中,提出了一种新型高增益天线。运用高频仿真软件Ansoft HFSS对天线进行了优化仿真,并加工出实物进行测试。测试结果显示,天线增益为12.9 dB,相对于传统的平板天线提高了6 dB。此外,由于设计的结构引入了环形孔结构和褶皱结构,天线的波瓣宽度测量结果为30°,相较于传统天线也减小了102°,天线的性能得到大幅提高。  相似文献   
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