有限長V錐天線的輻射場

【摘要】采用模式匹配法分析了有限長V錐天線的輻射特性，并給出了天線的輻射方向圖。通過對天線周圍空間的合理分區(qū)以及利用已有無限長V錐天線的輻射場公式，得到各分區(qū)的場量展開式，且展開系數(shù)由分區(qū)交界面的場分量連續(xù)條件加以確定，從而得到遠區(qū)輻射場的解析表達式。計算結(jié)果與仿真結(jié)果十分吻合，證實了模式匹配法用于分析有限長V錐天線輻射特性是非常成功的。該結(jié)果對非軸對稱天線的分析和V錐天線的工程設計有參考意義。
關 鍵 詞 超寬帶; V錐天線; 模式匹配; 三角板天線

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.