A Full-Wave Analysis of a Complete Model for a Radial Line Slot Antenna
A Full-Wave Analysis of a Complete Model for a Radial Line Slot Antenna
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径向线缝隙天线完整模型的全波分析
DOI：
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发表时间：
1999
影响因子：
0.7
通讯作者：
M. Ando
中科院分区：
文献类型：
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作者：
T. Yamamoto;J. Hirokawa;M. Ando
用矩量法对极小孔径径向线槽天线进行了分析。首先，确定了具有螺旋槽排列的RLSA圆柱波导的矩形腔模分析模型。首次预测了RLSAs实际结构的总驻波比和旋转对称性，并通过实验得到了证实。其次，利用传统矩形波导分析模型在径向波导短周处设计匹配槽对时，对径向波导同轴阵列RLSA的最小直径进行了估计。结果表明，对于增益小于25 dBi的小型rlsa，在设计和分析时必须考虑曲率和孔径周边的圆柱短壁。关键词：径向线槽天线，小孔径，矩形
Extremely small aperture radial line slot antennas (RLSAs) are analyzed by method of moments. At first, the analysis model of cylindrical waveguide in terms of rectangular cavity modes is confirmed for a RLSA with a spiral slot arrangement. The overall VSWR as well as rotational symmetry of the actual structure of RLSAs is predicted for the first time and is confirmed experimentally. Secondly, the minimum diameter of the concentric array RLSA is estimated for which the conventional analysis model of a rectangular waveguide is valid for the design of matching slot pairs at the shorted periphery of the radial waveguide. It is found that the curvature and cylindrical short wall at aperture periphery must be considered in the design and analysis of small RLSAs with the gain lower than about 25 dBi. key words: radial line slot antenna, small aperture, rectangular