A circularly polarized high-power antenna with higher-order mode excitation (TM01) is presented in this paper. The proposed structure consists of metal plates placed on the conical horn antenna's aperture for achieving TM01 to circular polarized TE11 mode conversion at the output. The structure is simulated on CST Microwave Studio. The designed antenna exhibits high gain and a directive radiation pattern. The axial ratio of the proposed structure is below 3 dB. The simulated and measured reflection coefficient for TM01 mode excitation is below −10 dB over a frequency range of 2.95–3.13 GHz. The structure is purely metallic, and the calculated high-power microwave (HPM) capability is up to the MW level. The proposed antenna is helpful for portable HPM systems.

中文翻译：

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具有高阶模激励的圆极化大功率天线

具有高阶模式激励的圆极化大功率天线（TM01) 在本文中介绍。所提出的结构由放置在锥形喇叭天线孔径上的金属板组成，用于实现 TM01对圆极化 TE11在输出模式转换。该结构在 CST Microwave Studio 上进行仿真。所设计的天线具有高增益和定向辐射方向图。拟议结构的轴比低于 3 dB。TM 的模拟和测量反射系数01模式激励在 2.95–3.13 GHz 的频率范围内低于 -10 dB。该结构为纯金属结构，计算出的高功率微波（HPM）能力达到MW级。所提出的天线有助于便携式 HPM 系统。