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有限长V锥天线的辐射场
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【摘要】采用模式匹配法分析了有限长V锥天线的辐射特性，并给出了天线的辐射方向图。通过对天线周围空间的合理分区以及利用已有无限长V锥天线的辐射场公式，得到各分区的场量展开式，且展开系数由分区交界面的场分量连续条件加以确定，从而得到远区辐射场的解析表达式。计算结果与仿真结果十分吻合，证实了模式匹配法用于分析有限长V锥天线辐射特性是非常成功的。该结果对非轴对称天线的分析和V锥天线的工程设计有参考意义。
关 键 词 超宽带; V锥天线; 模式匹配; 三角板天线
Using mode match matching, the paper at first time analyses the radiation fields of the V-conical antennas with finite length for the first time. This approach is facilitated by dividing the space into two subregions reasonably, thus allowing use of spherical harmonic expansions in each subregion.The expansion coefficients are found by enforcing the continuity condition at the region boundary surface. The methods leads to very good agreements between the theoretical results and the simulated results,which is given by Ansoft HFSS 8.0.The conclusions. of this paper can be used for engineering design of V conical antennas.
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