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本文设计了两种新颖的旋转对称单极子宽带天线 ,其终端分别采用球形加载和锥形加载技术 ,母线运用圆滑曲线过渡避免天线半径导数的不连续 ,有效地改善了阻抗特性、展宽了频段。文中应用扩展矩量法进行理论分析和实际计算 ,比较了同一高度、相同锥角条件下两种天线和不同高度、相同锥角及同一高度、不同锥角条件下同种天线的驻波比和增益获得了超宽频带的良好特性 ,其理论计算与实验测量结果吻合较好 ,为工程设计提供了理论依据。
In this paper, two novel rotary symmetric monopole broadband antennas are designed. Their terminals are respectively loaded with spherical loading and tapered loading technology. The bus uses smooth transition to avoid the discontinuity of antenna radiance, which effectively improves the impedance characteristics and broadens the frequency band . In the paper, the method of extended moment method is used to carry out theoretical analysis and practical calculation. Comparing the two kinds of antenna under the same height and the same taper angle, and comparing the standing wave ratio of the same antenna with different height, same taper angle and same height and different taper angle The gain obtained the good characteristics of ultra-wideband, and its theoretical calculation is in good agreement with the experimental measurement, which provides a theoretical basis for engineering design.